body.course-system-page,
body.hub-public-react-shell.course-system-page {
  min-width: 320px;
  margin: 0;
  background: var(--cs-bg);
  color: var(--cs-ink);
  font-family:
    "Inter Tight",
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

body.course-system-page,
body.hub-public-react-shell.course-system-page,
html.course-system-route,
.course-system-page {
  overflow-x: clip;
}

html.course-system-route body.hub-public-react-shell.course-system-page .hub-public-route {
  visibility: visible !important;
}

body.course-system-page .mobile-menu:not(.is-open),
body.course-system-page .mobile-menu-backdrop:not(.is-open) {
  display: none !important;
}

body.course-system-page .nav-locale-wrap:not(.is-open) .nav-locale-dropdown,
body.course-system-page .nav-user-wrap:not(.is-open) .nav-user-dropdown {
  display: none !important;
}

@media (max-width: 1180px) {
  body.course-system-page:not(.hub-nav-admin) header.nav .nav-links,
  body.course-system-page:not(.hub-nav-admin) .nav .nav-links,
  body.course-system-page .nav-links,
  body.course-system-page .nav-actions > .hide-mobile,
  body.course-system-page .nav-actions > .nav-sep.nav-public-action {
    display: none !important;
  }

  body.course-system-page .nav-burger {
    display: inline-flex !important;
  }

  body.course-system-page .nav-actions {
    width: auto !important;
    min-width: 0 !important;
    max-width: none !important;
    margin-left: auto !important;
    justify-content: flex-end !important;
  }
}

.course-system-page a {
  color: inherit;
}

body.digital-skills-study {
  background: var(--ds-bg);
}

body.digital-skills-study .site-footer,
body.digital-skills-study .legal-footer,
body.digital-skills-study #epso-whatsapp-cta {
  display: none;
}

.ds-course {
  display: grid;
  grid-template-columns: 270px minmax(0, 760px) 260px;
  gap: 28px;
  width: min(100vw - 56px, 1360px);
  margin: 0 auto;
  padding: 30px 0 58px;
  color: var(--ds-ink);
}

.ds-study-nav,
.ds-study-panel {
  position: sticky;
  top: calc(var(--nav-h, 68px) + 18px);
  align-self: start;
}

.ds-study-main {
  min-width: 0;
}

.ds-course-mark {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-course-mark img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.ds-course-mark span,
.ds-study-head span,
.ds-next-panel span,
.ds-source-row span {
  display: block;
  color: var(--ds-accent-dark);
  font-size: 11px;
  font-weight: 780;
  letter-spacing: 0;
  text-transform: uppercase;
}

.ds-course-mark strong {
  display: block;
  color: var(--ds-ink);
  font-size: 15px;
  line-height: 1.15;
}

.ds-course-mark small {
  display: block;
  margin-top: 3px;
  color: var(--ds-muted);
  font-size: 12px;
}

.ds-nav-scroll {
  display: grid;
  gap: 4px;
  max-height: calc(100vh - 170px);
  margin-top: 14px;
  overflow: auto;
  padding-right: 4px;
}

.ds-unit {
  border-bottom: 1px solid var(--ds-line);
  padding: 10px 0;
}

.ds-unit-head {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.ds-unit-head > span {
  color: var(--ds-muted);
  font-size: 11px;
  font-weight: 780;
  line-height: 20px;
}

.ds-unit-head strong,
.ds-unit-head small {
  display: block;
  min-width: 0;
}

.ds-unit-head strong {
  color: var(--ds-ink);
  font-size: 13px;
  line-height: 1.28;
}

.ds-unit-head small {
  margin-top: 3px;
  color: var(--ds-muted);
  font-size: 11px;
  line-height: 1.25;
}

.ds-unit-lessons {
  display: grid;
  gap: 2px;
  margin-top: 8px;
  padding-left: 38px;
}

.ds-lesson-link {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 6px;
  align-items: center;
  min-height: 30px;
  padding: 0 7px;
  border-radius: 6px;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 660;
  line-height: 1.25;
  text-decoration: none;
}

.ds-lesson-link:hover,
.ds-lesson-link.is-active {
  background: var(--ds-soft);
  color: var(--ds-ink);
}

.ds-lesson-link.is-complete span {
  color: var(--ds-accent);
}

.ds-study-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 138px;
  gap: 22px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-study-head h1 {
  max-width: 780px;
  margin: 5px 0 0;
  color: var(--ds-ink);
  font-size: clamp(31px, 3.2vw, 46px);
  font-weight: 760;
  line-height: 1.06;
  letter-spacing: 0;
}

.ds-study-head p {
  max-width: 720px;
  margin: 10px 0 0;
  color: var(--ds-muted);
  font-size: 15px;
  line-height: 1.55;
}

.ds-progress-chip {
  min-width: 0;
  padding-top: 4px;
}

.ds-progress-chip strong {
  display: block;
  color: var(--ds-ink);
  font-size: 24px;
  line-height: 1;
}

.ds-progress-chip progress {
  width: 100%;
  height: 6px;
  margin: 10px 0 6px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: var(--ds-soft);
}

.ds-progress-chip progress::-webkit-progress-bar {
  background: var(--ds-soft);
}

.ds-progress-chip progress::-webkit-progress-value {
  background: var(--ds-accent);
}

.ds-progress-chip small {
  color: var(--ds-muted);
  font-size: 12px;
}

.ds-mode-tabs {
  display: inline-grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin: 18px 0 20px;
  padding: 3px;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper);
}

.ds-mode-tabs button {
  min-width: 96px;
  min-height: 34px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ds-muted);
  font: inherit;
  font-size: 12px;
  font-weight: 760;
  cursor: pointer;
}

.ds-mode-tabs button.is-active {
  background: var(--ds-ink);
  color: var(--ds-paper);
}

.ds-lesson-paper {
  max-width: 760px;
}

.ds-mode-content {
  display: grid;
  gap: 22px;
}

.ds-learning-block {
  padding: 18px 0;
  border-top: 1px solid var(--ds-line);
}

.ds-learning-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.ds-learning-block h3 {
  margin: 0 0 8px;
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 820;
  letter-spacing: 0;
  text-transform: uppercase;
}

.ds-learning-block p {
  max-width: 720px;
  margin: 0;
  color: var(--ds-text-body);
  font-size: 17px;
  line-height: 1.72;
}

.ds-learning-block-plain {
  background: transparent;
}

.ds-error-list,
.ds-practice-list,
.ds-checklist {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 18px;
  color: var(--ds-text-body);
  font-size: 15px;
  line-height: 1.55;
}

.ds-checklist {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-left: 0;
  list-style: none;
}

.ds-checklist li {
  padding-left: 14px;
  border-left: 2px solid var(--ds-line-strong);
}

.ds-muted-line {
  margin-top: 12px !important;
  color: var(--ds-muted) !important;
  font-size: 14px !important;
}

.ds-source-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding-top: 18px;
  border-top: 1px solid var(--ds-line);
}

.ds-source-row a {
  color: var(--ds-accent-dark);
  font-size: 12px;
  font-weight: 720;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.ds-lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--ds-line);
}

.ds-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--ds-line-strong);
  border-radius: 7px;
  background: var(--ds-paper);
  color: var(--ds-ink);
  font: inherit;
  font-size: 13px;
  font-weight: 780;
  text-decoration: none;
  cursor: pointer;
}

.ds-action-primary {
  border-color: var(--ds-ink);
  background: var(--ds-ink);
  color: var(--ds-paper);
}

.ds-course-v2 .ds-action-primary {
  color: var(--ds-paper) !important;
}

.ds-action-secondary {
  color: var(--ds-ink);
}

.ds-study-panel {
  display: grid;
  gap: 12px;
}

.ds-next-panel,
.ds-panel-details {
  border-top: 1px solid var(--ds-line);
  padding-top: 14px;
}

.ds-next-panel strong {
  display: block;
  margin-top: 7px;
  color: var(--ds-ink);
  font-size: 17px;
  line-height: 1.25;
}

.ds-next-panel p {
  margin: 8px 0 13px;
  color: var(--ds-muted);
  font-size: 13px;
  line-height: 1.5;
}

.ds-panel-details summary {
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 820;
  cursor: pointer;
}

.ds-panel-details dl,
.ds-review-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 12px 0 0;
}

.ds-panel-details dl div,
.ds-review-stats div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  min-width: 0;
}

.ds-panel-details dt,
.ds-review-stats dt {
  color: var(--ds-muted);
  font-size: 12px;
}

.ds-panel-details dd,
.ds-review-stats dd {
  margin: 0;
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 800;
}

.ds-attempt-list {
  display: grid;
  gap: 7px;
  margin-top: 12px;
}

.ds-attempt-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 8px;
  align-items: baseline;
  padding: 8px 0;
  border-top: 1px solid var(--ds-line);
}

.ds-attempt-row strong {
  color: var(--ds-ink);
  font-size: 16px;
}

.ds-attempt-row span,
.ds-attempt-row small,
.ds-empty {
  color: var(--ds-muted);
  font-size: 12px;
  line-height: 1.4;
}

.ds-attempt-row small {
  grid-column: 2;
}

.ds-empty {
  margin: 10px 0 0;
}

.ds-link-button {
  min-height: 32px;
  margin-top: 10px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ds-accent-dark);
  font: inherit;
  font-size: 12px;
  font-weight: 780;
  cursor: pointer;
}

@media (max-width: 1120px) {
  .ds-course {
    grid-template-columns: minmax(0, 1fr);
    width: min(100vw - 32px, 860px);
  }

  .ds-study-main {
    order: 1;
  }

  .ds-study-nav {
    order: 2;
  }

  .ds-study-panel {
    order: 3;
  }

  .ds-study-nav,
  .ds-study-panel {
    position: static;
  }

  .ds-nav-scroll {
    max-height: 340px;
  }

  .ds-study-panel {
    grid-template-columns: 1fr;
  }
}

/* Integrated course shell: horizontal product navigation, no floating card. */
body.course-study-app .ds-course-v2:not(.ds-access-state),
body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed {
  width: 100%;
  max-width: none;
  min-height: calc(100svh - var(--nav-h, 68px));
  grid-template-columns: minmax(0, 1fr);
  margin: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: var(--ds-paper);
  box-shadow: none;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-course-top {
  position: sticky;
  z-index: 24;
  top: var(--nav-h, 68px);
  display: grid;
  width: 100%;
  height: 76px;
  min-height: 76px;
  grid-column: 1;
  grid-template-columns: minmax(220px, 280px) minmax(420px, 1fr) minmax(170px, 220px);
  grid-template-rows: 76px;
  align-items: stretch;
  border: 0;
  border-bottom: 1px solid var(--ds-line);
  background: color-mix(in srgb, var(--ds-paper) 94%, transparent);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--ds-ink) 5%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle {
  display: none;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity {
  display: grid;
  min-width: 0;
  grid-column: 1;
  grid-row: 1;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  justify-content: start;
  padding: 10px 24px;
  border: 0;
  border-right: 1px solid var(--ds-line);
  background: transparent;
  text-align: left;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity:hover {
  background: var(--ds-paper-soft);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity-copy,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity-copy {
  display: grid;
  min-width: 0;
  gap: 2px;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity-copy strong {
  overflow: hidden;
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity-copy small {
  overflow: hidden;
  color: var(--ds-text-meta);
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav {
  display: grid;
  min-width: 0;
  grid-column: 2;
  grid-row: 1;
  grid-template-columns: repeat(4, minmax(88px, 1fr));
  gap: 2px;
  align-items: stretch;
  padding: 8px 12px;
  border: 0;
  border-right: 1px solid var(--ds-line);
  background: transparent;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav button {
  min-width: 0;
  min-height: 44px;
  justify-content: center;
  gap: 8px;
  padding: 0 10px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button:hover {
  border-color: transparent;
  background: var(--ds-paper-soft);
  box-shadow: none;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button.is-active {
  border-color: transparent;
  background: transparent;
  color: var(--ds-accent-dark);
  box-shadow: inset 0 -3px 0 var(--ds-gold);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav .ds-icon {
  width: 17px;
  height: 17px;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-nav-label,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-nav-label {
  display: inline;
  min-width: 0;
  overflow: hidden;
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-top-progress {
  display: grid;
  grid-column: 3;
  grid-row: 1;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 12px;
  align-content: center;
  align-self: stretch;
  padding: 12px 22px;
  border: 0;
  background: transparent;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress strong {
  grid-column: 1;
  grid-row: 1;
  color: var(--ds-heading);
  font-size: 20px;
  line-height: 1;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress small {
  grid-column: 2;
  grid-row: 1;
  align-self: center;
  overflow: hidden;
  color: var(--ds-text-meta);
  font-size: 9px;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress progress {
  width: 100%;
  grid-column: 1 / -1;
  grid-row: 2;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-home-shell,
body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-study-layout,
body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-practice-shell,
body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-progress-shell {
  width: 100%;
  grid-column: 1;
}

body.course-study-app .ds-course-overview-identity .ds-home-icon {
  width: 46px;
  height: 46px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

body.course-study-app .ds-course-overview-identity .ds-home-icon img {
  width: 42px;
  height: 42px;
  filter: brightness(0) invert(1);
  opacity: 0.92;
}

@media (max-width: 980px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-course-top {
    grid-template-columns: minmax(210px, 250px) minmax(0, 1fr);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav {
    grid-column: 2;
    border-right: 0;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress {
    display: none;
  }
}

@media (max-width: 680px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-course-top {
    position: relative;
    top: auto;
    height: auto;
    min-height: 0;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 62px 58px;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity {
    grid-column: 1;
    grid-row: 1;
    padding: 8px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--ds-line);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity img {
    width: 34px;
    height: 34px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav {
    grid-column: 1;
    grid-row: 2;
    gap: 0;
    padding: 0 4px;
    border-right: 0;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav button {
    min-width: 0;
    min-height: 58px;
    flex-direction: column;
    gap: 4px;
    padding: 4px 2px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-nav-label {
    width: 100%;
    font-size: 9px;
    text-align: center;
  }
}

@media (max-width: 680px) {
  .ds-course {
    width: min(100vw - 20px, 860px);
    gap: 20px;
    padding-top: 18px;
  }

  .ds-study-head {
    grid-template-columns: 1fr;
  }

  .ds-study-head h1 {
    font-size: 31px;
  }

  .ds-progress-chip {
    display: none;
  }

  .ds-mode-tabs {
    display: grid;
    width: 100%;
  }

  .ds-mode-tabs button {
    min-width: 0;
  }

  .ds-learning-block p {
    font-size: 16px;
    line-height: 1.68;
  }

  .ds-checklist {
    grid-template-columns: 1fr;
  }

  .ds-lesson-actions,
  .ds-action {
    width: 100%;
  }

  .ds-unit-lessons {
    padding-left: 0;
  }
}

body.digital-skills-study {
  background: var(--ds-bg);
}

html body.digital-skills-focus .eu-ticker {
  display: none !important;
  visibility: hidden !important;
  min-height: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
}

body.digital-skills-focus .nav-links,
body.digital-skills-focus .nav-actions > :not(.nav-locale-wrap):not(.nav-burger) {
  visibility: hidden !important;
  pointer-events: none !important;
}

.ds-course-v2 {
  width: min(100vw - 48px, 1240px);
  margin: 0 auto;
  padding: 28px 0 58px;
  color: var(--ds-ink);
}

.ds-course-v2 *,
.ds-course-v2 *::before,
.ds-course-v2 *::after {
  box-sizing: border-box;
}

.ds-course-v2 :focus-visible {
  outline: 3px solid var(--ds-focus);
  outline-offset: 2px;
}

.ds-course-top {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(128px, 170px);
  gap: 18px;
  align-items: center;
  min-height: 56px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-course-identity,
.ds-surface-nav button,
.ds-action,
.ds-choice,
.ds-link-button,
.ds-focus-toggle {
  font-family:
    "Inter Tight",
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  letter-spacing: 0;
}

.ds-course-identity {
  display: inline-grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 11px;
  align-items: center;
  width: fit-content;
  max-width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.ds-course-identity img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.ds-course-identity strong,
.ds-course-identity small,
.ds-module-copy strong,
.ds-module-copy small,
.ds-module-copy em,
.ds-reader-meta span,
.ds-module-state b,
.ds-module-state small,
.ds-module-next {
  display: block;
  min-width: 0;
}

.ds-course-identity strong {
  overflow: hidden;
  color: var(--ds-ink);
  font-size: 15px;
  font-weight: 820;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ds-course-identity small {
  margin-top: 4px;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 660;
}

.ds-surface-nav {
  display: inline-grid;
  grid-template-columns: repeat(4, minmax(74px, 1fr));
  gap: 2px;
  align-items: center;
  justify-self: center;
  padding: 3px;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper);
}

.ds-surface-nav button {
  min-height: 34px;
  padding: 0 11px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 780;
  line-height: 1;
  cursor: pointer;
}

.ds-surface-nav button.is-active {
  background: var(--ds-ink);
  color: var(--ds-paper);
}

.ds-focus-toggle {
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--ds-line-strong);
  border-radius: 7px;
  background: var(--ds-paper);
  color: var(--ds-ink);
  font-size: 12px;
  font-weight: 780;
  line-height: 1;
  cursor: pointer;
}

.ds-focus-toggle[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--ds-accent) 45%, transparent);
  background: color-mix(in srgb, var(--ds-accent) 10%, transparent);
  color: var(--ds-accent-dark);
}

.ds-top-progress {
  justify-self: end;
  width: 100%;
}

.ds-top-progress strong {
  display: block;
  color: var(--ds-ink);
  font-size: 18px;
  font-weight: 850;
  line-height: 1;
  text-align: right;
}

.ds-top-progress progress,
.ds-home-next progress,
.ds-progress-list progress,
.ds-practice-progress progress {
  width: 100%;
  height: 7px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: var(--ds-soft);
}

.ds-top-progress progress {
  margin-top: 9px;
}

.ds-top-progress progress::-webkit-progress-bar,
.ds-home-next progress::-webkit-progress-bar,
.ds-progress-list progress::-webkit-progress-bar,
.ds-practice-progress progress::-webkit-progress-bar {
  background: var(--ds-soft);
}

.ds-top-progress progress::-webkit-progress-value,
.ds-home-next progress::-webkit-progress-value,
.ds-progress-list progress::-webkit-progress-value,
.ds-practice-progress progress::-webkit-progress-value {
  background: var(--ds-accent);
}

.ds-home-shell,
.ds-practice-shell,
.ds-progress-shell {
  padding-top: 36px;
}

.ds-home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: clamp(28px, 6vw, 76px);
  align-items: end;
  padding: 18px 0 38px;
}

.ds-home-copy span,
.ds-section-head span,
.ds-question-box > span,
.ds-kicker,
.ds-progress-main > span,
.ds-reader-head > span,
.ds-source-row span,
.ds-home-next > span {
  display: block;
  color: var(--ds-accent-dark);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.ds-home-copy h1,
.ds-reader-head h1,
.ds-practice-main h1,
.ds-progress-main h1 {
  max-width: 820px;
  margin: 8px 0 0;
  color: var(--ds-ink);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 760;
  line-height: 1.02;
  letter-spacing: 0;
}

.ds-reader-head h1,
.ds-practice-main h1,
.ds-progress-main h1 {
  font-size: clamp(34px, 4.3vw, 54px);
}

.ds-home-copy p,
.ds-reader-head p,
.ds-lead,
.ds-aside-block p {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--ds-muted);
  font-size: 17px;
  line-height: 1.62;
}

.ds-home-next {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 18px 0 0;
  border-top: 1px solid var(--ds-line);
}

.ds-home-next strong {
  color: var(--ds-ink);
  font-size: 24px;
  font-weight: 830;
  line-height: 1.05;
}

.ds-home-next small {
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 680;
}

.ds-section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: end;
  padding: 24px 0 16px;
  border-top: 1px solid var(--ds-line);
}

.ds-section-head h2,
.ds-reader-block h2,
.ds-aside-block h2,
.ds-learning-block h3 {
  margin: 0;
  color: var(--ds-ink);
  font-size: 15px;
  font-weight: 840;
  line-height: 1.2;
}

.ds-section-head p {
  max-width: 680px;
  margin: 7px 0 0;
  color: var(--ds-muted);
  font-size: 14px;
  line-height: 1.55;
}

.ds-module-timeline {
  display: grid;
  border-top: 1px solid var(--ds-line);
}

.ds-module-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 116px minmax(160px, 220px);
  gap: 18px;
  align-items: center;
  min-height: 104px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ds-line);
  color: inherit;
  text-decoration: none;
}

.ds-module-row:hover .ds-module-copy strong,
.ds-pending-list a:hover strong {
  color: var(--ds-accent-dark);
}

.ds-module-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 820;
}

.ds-module-row.is-complete .ds-module-index {
  border-color: color-mix(in srgb, var(--ds-accent) 35%, transparent);
  color: var(--ds-accent-dark);
}

.ds-module-copy strong {
  color: var(--ds-ink);
  font-size: 17px;
  font-weight: 820;
  line-height: 1.25;
}

.ds-module-copy small {
  margin-top: 5px;
  color: var(--ds-muted);
  font-size: 14px;
  line-height: 1.45;
}

.ds-module-copy em {
  margin-top: 9px;
  color: var(--ds-text-meta);
  font-size: 12px;
  font-style: normal;
  font-weight: 760;
}

.ds-module-state b {
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 820;
}

.ds-module-state small,
.ds-module-next {
  margin-top: 4px;
  color: var(--ds-muted);
  font-size: 12px;
  line-height: 1.35;
}

.ds-module-next {
  color: var(--ds-accent-dark);
  font-weight: 760;
}

.ds-study-layout {
  display: grid;
  grid-template-columns: minmax(210px, 260px) minmax(0, 760px) minmax(210px, 250px);
  gap: clamp(22px, 3vw, 34px);
  align-items: start;
  padding-top: 30px;
}

.ds-course-v2.is-focus {
  width: min(100vw - 48px, 1120px);
}

.ds-course-v2.is-focus .ds-study-layout {
  grid-template-columns: minmax(210px, 260px) minmax(0, 820px);
  justify-content: center;
}

.ds-course-v2.is-focus .ds-study-panel {
  display: none;
}

.ds-syllabus,
.ds-study-panel {
  position: sticky;
  top: calc(var(--nav-h, 68px) + 18px);
  align-self: start;
}

.ds-syllabus details {
  border-top: 1px solid var(--ds-line);
  padding-top: 14px;
}

.ds-syllabus summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 830;
  cursor: pointer;
  list-style-position: outside;
}

.ds-syllabus summary span {
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 760;
}

.ds-syllabus-scroll {
  max-height: calc(100vh - 178px);
  margin-top: 14px;
  overflow: auto;
  padding-right: 6px;
}

.ds-unit {
  padding: 12px 0;
  border-bottom: 1px solid var(--ds-line);
}

.ds-unit-head {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.ds-unit-head > span {
  color: var(--ds-muted);
  font-size: 11px;
  font-weight: 800;
  line-height: 20px;
}

.ds-unit-head strong,
.ds-unit-head small {
  display: block;
  min-width: 0;
}

.ds-unit-head strong {
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.25;
}

.ds-unit-head small {
  margin-top: 4px;
  color: var(--ds-muted);
  font-size: 11px;
  line-height: 1.25;
}

.ds-unit-lessons {
  display: grid;
  gap: 2px;
  margin-top: 9px;
  padding-left: 38px;
}

.ds-lesson-link {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 6px;
  align-items: center;
  min-height: 31px;
  padding: 0 8px;
  border-radius: 7px;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 680;
  line-height: 1.25;
  text-decoration: none;
}

.ds-lesson-link:hover,
.ds-lesson-link.is-active {
  background: var(--ds-soft);
  color: var(--ds-ink);
}

.ds-lesson-link.is-complete span {
  color: var(--ds-accent);
}

.ds-reader {
  min-width: 0;
}

.ds-reader-head {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-reader-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.ds-reader-meta span {
  color: var(--ds-text-meta);
  font-size: 12px;
  font-weight: 780;
}

.ds-reader-paper {
  padding: 10px 0 0;
}

.ds-reader-block,
.ds-learning-block {
  padding: 24px 0;
  border-bottom: 1px solid var(--ds-line);
  border-top: 0;
}

.ds-reader-block h2,
.ds-learning-block h3 {
  margin-bottom: 10px;
}

.ds-reader-block p,
.ds-learning-block p {
  max-width: 720px;
  margin: 0;
  color: var(--ds-text-body);
  font-size: 18px;
  line-height: 1.76;
}

.ds-rich-stack {
  display: grid;
  gap: 22px;
  padding: 8px 0 28px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-rich-panel {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.ds-rich-panel h3 {
  width: fit-content;
  max-width: 100%;
  margin: 0;
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 860;
  line-height: 1.2;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--ds-accent) 38%, transparent);
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
  text-transform: uppercase;
}

.ds-rich-panel p {
  margin: 0;
  color: var(--ds-text-body);
  font-size: 14px;
  line-height: 1.58;
}

.ds-document-paper {
  display: block;
}

.ds-doc-flow {
  display: grid;
  gap: 18px;
  color: var(--ds-text-body);
}

.ds-doc-heading {
  width: fit-content;
  max-width: 100%;
  margin: 0;
  color: var(--ds-ink);
  font-weight: 870;
  letter-spacing: 0;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--ds-accent) 36%, transparent);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.ds-doc-heading-2 {
  margin-top: 8px;
  font-size: 22px;
  line-height: 1.22;
}

.ds-doc-heading-3 {
  margin-top: 4px;
  font-size: 16px;
  line-height: 1.25;
}

.ds-doc-heading-4 {
  margin-top: 2px;
  color: var(--ds-accent-dark);
  font-size: 13px;
  line-height: 1.25;
  text-transform: uppercase;
}

.ds-doc-paragraph p,
.ds-doc-note p,
.ds-doc-table p {
  margin: 0;
  color: var(--ds-text-body);
  font-size: 16px;
  line-height: 1.72;
}

.ds-doc-paragraph p + p,
.ds-doc-note p + p,
.ds-doc-table p + p {
  margin-top: 8px;
}

.ds-doc-meta-grid {
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid color-mix(in srgb, var(--ds-accent) 20%, var(--ds-line));
  border-radius: 8px;
  background: color-mix(in srgb, var(--ds-accent) 5%, var(--ds-paper));
}

.ds-doc-meta-grid p {
  margin: 0;
  color: var(--ds-text-body);
  font-size: 14px;
  font-weight: 730;
  line-height: 1.5;
}

.ds-doc-note {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px;
  border: 1px solid color-mix(in srgb, var(--ds-accent) 24%, var(--ds-line));
  border-radius: 8px;
  background: color-mix(in srgb, var(--ds-accent) 7%, var(--ds-paper));
}

.ds-doc-note-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid color-mix(in srgb, var(--ds-accent) 24%, transparent);
  border-radius: 8px;
  background: var(--ds-paper);
  color: var(--ds-accent-dark);
}

.ds-doc-note h3 {
  margin: 0 0 8px;
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 860;
  line-height: 1.2;
  text-transform: uppercase;
}

.ds-doc-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding-left: 22px;
  color: var(--ds-text-body);
  font-size: 15px;
  line-height: 1.58;
}

.ds-doc-list li::marker {
  color: var(--ds-accent-dark);
  font-weight: 850;
}

.ds-doc-table-wrap {
  min-width: 0;
  overflow-x: auto;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper);
}

.ds-doc-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.ds-doc-table th,
.ds-doc-table td {
  min-width: 0;
  padding: 13px 14px;
  border: 1px solid var(--ds-line);
  text-align: left;
  vertical-align: top;
}

.ds-doc-table tr:first-child th,
.ds-doc-table tr:first-child td {
  border-top: 0;
}

.ds-doc-table tr:last-child td {
  border-bottom: 0;
}

.ds-doc-table th:first-child,
.ds-doc-table td:first-child {
  border-left: 0;
}

.ds-doc-table th:last-child,
.ds-doc-table td:last-child {
  border-right: 0;
}

.ds-doc-table tr.is-header th {
  background: var(--ds-soft);
}

.ds-doc-table th p {
  color: var(--ds-ink);
  font-size: 12px;
  font-weight: 860;
  line-height: 1.42;
  text-transform: uppercase;
}

.ds-doc-table td p {
  font-size: 14px;
  line-height: 1.58;
}

.ds-rich-callout {
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: start;
  padding: 16px;
  border: 1px solid color-mix(in srgb, var(--ds-accent) 22%, var(--ds-line));
  border-radius: 8px;
  background: color-mix(in srgb, var(--ds-accent) 7%, var(--ds-paper));
}

.ds-rich-icon,
.ds-mini-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid color-mix(in srgb, var(--ds-accent) 24%, transparent);
  border-radius: 8px;
  background: var(--ds-paper);
  color: var(--ds-accent-dark);
}

.ds-card-grid,
.ds-quality-grid,
.ds-dossier-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.ds-mini-card,
.ds-quality-grid article,
.ds-dossier-list article {
  display: grid;
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper-soft);
}

.ds-mini-card {
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.ds-mini-card strong,
.ds-quality-grid strong,
.ds-dossier-list strong,
.ds-step-list strong,
.ds-rubric-row strong {
  display: block;
  min-width: 0;
  color: var(--ds-ink);
  font-size: 14px;
  font-weight: 840;
  line-height: 1.25;
}

.ds-mini-card p,
.ds-quality-grid p,
.ds-dossier-list p {
  margin-top: 7px;
}

.ds-compare-table,
.ds-rubric-grid {
  display: grid;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper);
}

.ds-compare-head,
.ds-compare-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ds-compare-head {
  background: var(--ds-soft);
  color: var(--ds-ink);
  font-size: 12px;
  font-weight: 840;
  text-transform: uppercase;
}

.ds-compare-head span,
.ds-compare-row p {
  min-width: 0;
  padding: 12px 14px;
}

.ds-compare-row + .ds-compare-row,
.ds-rubric-row + .ds-rubric-row {
  border-top: 1px solid var(--ds-line);
}

.ds-compare-row p:first-child {
  color: var(--ds-muted);
}

.ds-compare-row p + p,
.ds-compare-head span + span {
  border-left: 1px solid var(--ds-line);
}

.ds-step-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ds-step-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 0;
  border-top: 1px solid var(--ds-line);
}

.ds-step-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.ds-step-list li > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  border: 1px solid var(--ds-line-strong);
  border-radius: 8px;
  color: var(--ds-accent-dark);
  font-size: 11px;
  font-weight: 860;
}

.ds-step-list em {
  display: block;
  margin-top: 7px;
  color: var(--ds-text-meta);
  font-size: 12px;
  font-style: normal;
  font-weight: 760;
}

.ds-quality-grid article {
  gap: 9px;
}

.ds-quality-grid p span {
  display: block;
  margin-bottom: 3px;
  color: var(--ds-accent-dark);
  font-size: 11px;
  font-weight: 840;
  text-transform: uppercase;
}

.ds-task-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
}

.ds-task-map div {
  min-width: 0;
  padding: 12px;
  border-left: 2px solid var(--ds-accent);
  background: var(--ds-paper-soft);
}

.ds-task-map dt {
  color: var(--ds-ink);
  font-size: 12px;
  font-weight: 840;
  text-transform: uppercase;
}

.ds-task-map dd {
  margin: 6px 0 0;
  color: var(--ds-text-body);
  font-size: 13px;
  line-height: 1.5;
}

.ds-rubric-grid {
  overflow-x: auto;
}

.ds-rubric-head,
.ds-rubric-row {
  display: grid;
  grid-template-columns: 150px repeat(3, minmax(170px, 1fr));
  min-width: 760px;
}

.ds-rubric-head {
  background: var(--ds-soft);
  color: var(--ds-ink);
  font-size: 11px;
  font-weight: 860;
  text-transform: uppercase;
}

.ds-rubric-head span,
.ds-rubric-row strong,
.ds-rubric-row p {
  min-width: 0;
  padding: 12px;
}

.ds-rubric-row strong {
  background: var(--ds-paper-soft);
}

.ds-rubric-head span + span,
.ds-rubric-row p,
.ds-rubric-row strong + p {
  border-left: 1px solid var(--ds-line);
}

.ds-error-list,
.ds-practice-list,
.ds-checklist,
.ds-pending-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding-left: 18px;
  color: var(--ds-text-body);
  font-size: 15px;
  line-height: 1.55;
}

.ds-checklist {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-left: 0;
  list-style: none;
}

.ds-checklist li {
  padding-left: 14px;
  border-left: 2px solid var(--ds-line-strong);
}

.ds-source-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding-top: 14px;
  border-top: 0;
}

.ds-source-row a {
  color: var(--ds-accent-dark);
  font-size: 12px;
  font-weight: 720;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.ds-reader-actions,
.ds-surface-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--ds-line);
}

.ds-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--ds-line-strong);
  border-radius: 7px;
  background: var(--ds-paper);
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 780;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
}

.ds-action-primary {
  border-color: var(--ds-ink);
  background: var(--ds-ink);
  color: var(--ds-paper);
}

.ds-action-secondary {
  color: var(--ds-ink);
}

.ds-study-panel {
  display: grid;
  gap: 18px;
}

.ds-aside-block {
  border-top: 1px solid var(--ds-line);
  padding-top: 16px;
}

.ds-note-block label {
  display: block;
  margin: 0 0 10px;
  color: var(--ds-ink);
  font-size: 15px;
  font-weight: 840;
  line-height: 1.2;
}

.ds-note-block textarea {
  width: 100%;
  min-height: 150px;
  resize: vertical;
  border: 1px solid var(--ds-line-strong);
  border-radius: 8px;
  background: var(--ds-paper);
  color: var(--ds-ink);
  font: 14px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  padding: 12px;
}

.ds-note-block textarea::placeholder {
  color: color-mix(in srgb, var(--ds-muted) 72%, transparent);
}

.ds-note-block p {
  margin-top: 8px;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 720;
}

.ds-aside-block p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.55;
}

.ds-practice-shell,
.ds-progress-shell {
  display: grid;
  grid-template-columns: minmax(0, 780px) minmax(240px, 320px);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.ds-practice-main,
.ds-progress-main {
  min-width: 0;
}

.ds-practice-progress {
  width: min(100%, 360px);
  margin-bottom: 24px;
}

.ds-practice-progress span {
  display: block;
  margin-bottom: 8px;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 780;
}

.ds-question-box {
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--ds-line);
}

.ds-question-box h2 {
  max-width: 760px;
  margin: 8px 0 0;
  color: var(--ds-ink);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 760;
  line-height: 1.18;
}

.ds-choice-list {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.ds-choice {
  width: 100%;
  min-height: 58px;
  padding: 14px 16px;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper);
  color: var(--ds-ink);
  text-align: left;
  cursor: pointer;
}

.ds-choice strong {
  display: block;
  color: var(--ds-ink);
  font-size: 15px;
  font-weight: 720;
  line-height: 1.45;
}

.ds-choice:hover,
.ds-choice.is-selected {
  border-color: var(--ds-line-strong);
  background: var(--ds-paper-hover);
}

.ds-choice.is-correct {
  border-color: color-mix(in srgb, var(--ds-accent) 55%, transparent);
  background: color-mix(in srgb, var(--ds-accent) 8%, transparent);
}

.ds-choice.is-incorrect {
  border-color: color-mix(in srgb, var(--ds-danger) 50%, transparent);
  background: color-mix(in srgb, var(--ds-danger) 7%, transparent);
}

.ds-feedback {
  margin-top: 16px;
  padding: 14px 16px;
  border-left: 3px solid var(--ds-line-strong);
  background: var(--ds-paper-hover);
}

.ds-feedback strong {
  color: var(--ds-ink);
  font-size: 14px;
  font-weight: 840;
}

.ds-feedback p {
  margin: 5px 0 0;
  color: var(--ds-text-body);
  font-size: 14px;
  line-height: 1.55;
}

.ds-feedback.is-success {
  border-left-color: var(--ds-accent);
}

.ds-feedback.is-error {
  border-left-color: var(--ds-danger);
}

.ds-result-card {
  display: grid;
  gap: 6px;
  max-width: 460px;
  margin-top: 32px;
  padding: 22px;
  border: 1px solid var(--ds-line);
  border-left: 4px solid var(--ds-line-strong);
  border-radius: 8px;
  background: var(--ds-paper);
}

.ds-result-card strong {
  color: var(--ds-ink);
  font-size: clamp(42px, 6vw, 64px);
  font-weight: 850;
  line-height: 0.95;
}

.ds-result-card span {
  color: var(--ds-muted);
  font-size: 14px;
  font-weight: 780;
}

.ds-result-card p {
  margin: 4px 0 0;
  color: var(--ds-text-body);
  font-size: 14px;
  line-height: 1.5;
}

.ds-result-card.is-pass {
  border-left-color: var(--ds-accent);
}

.ds-result-card.is-fail {
  border-left-color: var(--ds-danger);
}

.ds-progress-list {
  display: grid;
  gap: 0;
  margin-top: 36px;
  border-top: 1px solid var(--ds-line);
}

.ds-progress-list > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(140px, auto);
  gap: 16px;
  align-items: center;
  min-height: 70px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ds-line);
}

.ds-progress-list strong {
  color: var(--ds-ink);
  font-size: 16px;
  font-weight: 820;
}

.ds-progress-list span {
  color: var(--ds-muted);
  font-size: 14px;
  font-weight: 700;
  text-align: right;
}

.ds-progress-list progress {
  grid-column: 1 / -1;
}

.ds-pending-list {
  list-style: none;
  padding-left: 0;
}

.ds-pending-list a {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--ds-line);
  color: inherit;
  text-decoration: none;
}

.ds-pending-list strong {
  display: block;
  color: var(--ds-ink);
  font-size: 14px;
  line-height: 1.35;
}

.ds-pending-list span {
  display: block;
  margin-top: 4px;
  color: var(--ds-muted);
  font-size: 12px;
  line-height: 1.3;
}

.ds-attempt-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.ds-attempt-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 4px 8px;
  align-items: baseline;
  padding: 8px 0;
  border-top: 1px solid var(--ds-line);
}

.ds-attempt-row strong {
  color: var(--ds-ink);
  font-size: 16px;
}

.ds-attempt-row span,
.ds-attempt-row small,
.ds-empty {
  color: var(--ds-muted);
  font-size: 12px;
  line-height: 1.4;
}

.ds-attempt-row small {
  grid-column: 2;
}

.ds-empty {
  margin: 10px 0 0;
}

.ds-state {
  display: grid;
  place-items: center;
  min-height: 360px;
  text-align: center;
}

.ds-state-inline {
  display: grid;
  align-content: center;
  min-height: 360px;
}

@media (max-width: 1120px) {
  .ds-course-v2 {
    width: min(100vw - 32px, 940px);
  }

  .ds-course-top {
    grid-template-columns: minmax(0, 1fr);
    justify-items: stretch;
  }

  .ds-surface-nav {
    justify-self: stretch;
  }

  .ds-top-progress {
    justify-self: stretch;
  }

  .ds-top-progress strong {
    text-align: left;
  }

  .ds-study-layout,
  .ds-course-v2.is-focus .ds-study-layout,
  .ds-practice-shell,
  .ds-progress-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-reader {
    order: 1;
  }

  .ds-syllabus {
    order: 2;
  }

  .ds-study-panel {
    order: 3;
  }

  .ds-course-v2.is-focus .ds-syllabus {
    display: none;
  }

  .ds-syllabus,
  .ds-study-panel {
    position: static;
  }

  .ds-syllabus-scroll {
    max-height: 360px;
  }

  .ds-module-row {
    grid-template-columns: 44px minmax(0, 1fr) 100px;
  }

  .ds-module-next {
    grid-column: 2 / -1;
  }
}

@media (max-width: 680px) {
  .ds-course-v2 {
    width: min(100vw - 20px, 860px);
    padding-top: 18px;
  }

  .ds-surface-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ds-home-hero,
  .ds-section-head,
  .ds-progress-list > div {
    grid-template-columns: 1fr;
  }

  .ds-progress-list span {
    text-align: left;
  }

  .ds-module-row {
    grid-template-columns: 38px minmax(0, 1fr);
    align-items: start;
    min-height: 0;
    gap: 12px;
  }

  .ds-module-state,
  .ds-module-next {
    grid-column: 2;
  }

  .ds-home-copy h1,
  .ds-reader-head h1,
  .ds-practice-main h1,
  .ds-progress-main h1 {
    font-size: 34px;
  }

  .ds-home-copy p,
  .ds-reader-head p,
  .ds-lead,
  .ds-reader-block p,
  .ds-learning-block p {
    font-size: 16px;
    line-height: 1.68;
  }

  .ds-checklist {
    grid-template-columns: 1fr;
  }

  .ds-reader-actions,
  .ds-surface-actions,
  .ds-action {
    width: 100%;
  }

  .ds-unit-lessons {
    padding-left: 0;
  }
}

/* Course cockpit and compact curriculum */
.ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle {
  width: 34px;
  margin: 14px 14px 0 auto;
  padding: 0;
}

.ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle .ds-toggle-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.ds-course-v2:not(.ds-access-state) .ds-course-identity-copy strong {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-height: 1.22;
  white-space: normal;
}

.ds-course-v2:not(.ds-access-state) .ds-surface-nav button.is-active {
  background: var(--ds-paper);
  color: var(--ds-heading);
  box-shadow: inset 3px 0 0 var(--ds-gold);
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 10px;
  align-items: end;
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress strong {
  grid-row: 1 / 3;
  align-self: center;
  font-size: 24px;
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress small {
  color: var(--ds-muted);
  font-size: 10px;
  font-weight: 700;
  line-height: 1.35;
  text-align: right;
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress progress {
  margin-top: 0;
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress progress::-webkit-progress-value,
.ds-course-overview-progress progress::-webkit-progress-value {
  background: var(--ds-gold);
}

.ds-course-overview-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: clamp(34px, 6vw, 88px);
  align-items: end;
  padding: 2px 0 34px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-course-overview-identity {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ds-course-overview-identity .ds-home-icon {
  width: 52px;
  height: 52px;
  margin: 0;
}

.ds-course-overview-identity > span,
.ds-course-overview-progress > span,
.ds-course-resume-copy > span {
  color: var(--ds-muted);
  font-size: 10px;
  font-weight: 820;
  text-transform: uppercase;
}

.ds-course-overview-head .ds-home-copy h1 {
  max-width: 780px;
  margin-top: 18px;
  font-size: 48px;
  line-height: 1.02;
}

.ds-course-overview-head .ds-home-copy p {
  max-width: 680px;
  font-size: 16px;
}

.ds-course-overview-progress {
  display: grid;
  gap: 10px;
  min-width: 0;
  border-left: 1px solid var(--ds-line);
  padding-left: 28px;
}

.ds-course-overview-progress strong {
  color: var(--ds-heading);
  font-size: 28px;
  font-weight: 840;
  line-height: 1.05;
}

.ds-course-overview-progress small {
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 680;
}

.ds-course-overview-progress progress {
  width: 100%;
  height: 6px;
  overflow: hidden;
  border: 0;
  background: var(--ds-soft);
}

.ds-course-overview-progress progress::-webkit-progress-bar {
  background: var(--ds-soft);
}

.ds-course-resume {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
  margin: 28px 0 8px;
  overflow: hidden;
  border-radius: 8px;
  padding: 28px 30px 28px 34px;
  background: var(--ds-heading);
  color: var(--ds-paper);
}

.ds-course-resume::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--ds-gold);
}

.ds-course-resume-copy > span {
  color: var(--ds-gold);
}

.ds-course-resume-copy p {
  margin: 9px 0 0;
  color: color-mix(in srgb, var(--ds-paper) 72%, transparent);
  font-size: 12px;
  font-weight: 700;
}

.ds-course-resume-copy h2 {
  max-width: 760px;
  margin: 7px 0 0;
  color: var(--ds-paper);
  font-size: 25px;
  font-weight: 820;
  line-height: 1.15;
}

.ds-course-resume-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 14px;
  color: color-mix(in srgb, var(--ds-paper) 68%, transparent);
  font-size: 11px;
  font-weight: 680;
}

.ds-course-resume-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 48px;
  border: 1px solid var(--ds-gold);
  border-radius: 8px;
  padding: 0 20px;
  background: var(--ds-gold);
  color: var(--ds-heading);
  font-size: 13px;
  font-weight: 820;
  text-decoration: none;
  transition: transform 180ms ease, background-color 180ms ease;
}

.ds-course-resume-action:hover {
  background: color-mix(in srgb, var(--ds-gold) 88%, var(--ds-paper));
  transform: translate3d(0, -1px, 0);
}

.ds-course-resume-action .ds-icon {
  width: 17px;
  height: 17px;
}

.ds-course-v2[data-course-surface="overview"] .ds-section-head {
  align-items: center;
  margin-top: 18px;
  border-top: 0;
}

.ds-course-v2[data-course-surface="overview"] .ds-section-head h2 {
  font-size: 19px;
}

.ds-course-track-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 4px;
  margin: 2px 0 12px;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  padding: 4px;
  background: var(--ds-paper-soft);
}

.ds-course-track-tabs button {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  gap: 9px;
  align-items: center;
  min-width: 0;
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  padding: 8px 12px;
  background: transparent;
  color: var(--ds-muted);
  text-align: left;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease;
}

.ds-course-track-tabs button:hover {
  background: var(--ds-paper-hover);
  color: var(--ds-heading);
}

.ds-course-track-tabs button.is-active {
  background: var(--ds-heading);
  color: var(--ds-paper);
}

.course-system-page .ds-course-v2 .ds-course-resume-action {
  color: var(--ds-paper);
}

.ds-course-track-tabs button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--ds-gold) 72%, transparent);
  outline-offset: 2px;
}

.ds-course-track-tabs button > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ds-course-track-tabs .ds-icon {
  width: 17px;
  height: 17px;
}

.ds-course-track-tabs b {
  overflow: hidden;
  font-size: 12px;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ds-course-track-tabs small {
  color: inherit;
  font-size: 9px;
  font-weight: 720;
  opacity: 0.72;
  white-space: nowrap;
}

.ds-course-path {
  display: grid;
  gap: 8px;
  padding-bottom: 12px;
}

.ds-course-module {
  overflow: hidden;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper);
}

.ds-course-module.is-current {
  border-color: color-mix(in srgb, var(--ds-gold) 58%, var(--ds-line));
  box-shadow: inset 4px 0 0 var(--ds-gold);
}

.ds-course-module.is-complete {
  border-color: color-mix(in srgb, var(--ds-accent) 22%, var(--ds-line));
}

.ds-course-module-summary {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 112px 90px 24px;
  gap: 18px;
  align-items: center;
  min-height: 88px;
  padding: 14px 18px;
  list-style: none;
  cursor: pointer;
  transition: background-color 180ms ease;
}

.ds-course-module-summary::-webkit-details-marker {
  display: none;
}

.ds-course-module-summary:hover {
  background: var(--ds-paper-hover);
}

.ds-course-module[open] > .ds-course-module-summary {
  background: var(--ds-paper-soft);
}

.ds-course-module .ds-module-index {
  display: grid;
  grid-template-columns: 1fr;
  place-items: center;
  gap: 1px;
  width: 38px;
  height: 44px;
}

.ds-course-module .ds-module-index .ds-icon {
  width: 14px;
  height: 14px;
}

.ds-course-module .ds-module-index b {
  font-size: 9px;
}

.ds-course-module .ds-module-copy,
.ds-course-module .ds-module-meta,
.ds-course-module .ds-module-state {
  display: grid;
  min-width: 0;
  gap: 5px;
}

.ds-course-module .ds-module-copy strong {
  font-size: 16px;
}

.ds-course-module .ds-module-copy small {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
  margin: 0;
  font-size: 12px;
}

.ds-course-module .ds-module-meta b,
.ds-course-module .ds-module-state b {
  color: var(--ds-heading);
  font-size: 11px;
  font-weight: 800;
}

.ds-course-module .ds-module-meta small,
.ds-course-module .ds-module-state small {
  margin: 0;
  color: var(--ds-muted);
  font-size: 10px;
  font-weight: 680;
}

.ds-course-module.is-complete .ds-module-state b {
  color: var(--ds-accent-dark);
}

.ds-module-chevron {
  color: var(--ds-muted);
  transition: transform 180ms ease;
}

.ds-module-chevron .ds-icon {
  width: 16px;
  height: 16px;
}

.ds-course-module[open] .ds-module-chevron {
  transform: rotate(90deg);
}

.ds-course-module-lessons {
  display: grid;
  margin: 0;
  border-top: 1px solid var(--ds-line);
  padding: 0 18px 8px 80px;
  list-style: none;
  animation: ds-course-module-open 180ms ease both;
}

.ds-course-module-lessons li + li {
  border-top: 1px solid var(--ds-line-faint);
}

.ds-course-module-lessons a {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 20px;
  gap: 12px;
  align-items: center;
  min-height: 56px;
  color: inherit;
  text-decoration: none;
}

.ds-course-module-lessons a:hover .ds-course-lesson-copy strong,
.ds-course-module-lessons li.is-current .ds-course-lesson-copy strong {
  color: var(--ds-accent-dark);
}

.ds-course-lesson-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--ds-line-strong);
  border-radius: 50%;
  color: var(--ds-muted);
  font-size: 10px;
  font-weight: 800;
}

.ds-course-module-lessons li.is-complete .ds-course-lesson-index {
  border-color: color-mix(in srgb, var(--ds-accent) 35%, var(--ds-line));
  background: var(--ds-success-soft);
  color: var(--ds-accent-dark);
}

.ds-course-lesson-index .ds-icon {
  width: 13px;
  height: 13px;
}

.ds-course-lesson-copy {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.ds-course-lesson-copy strong {
  overflow: hidden;
  color: var(--ds-heading);
  font-size: 12px;
  font-weight: 760;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ds-course-lesson-copy small {
  color: var(--ds-muted);
  font-size: 10px;
  font-weight: 680;
}

.ds-course-module-lessons li.is-current .ds-course-lesson-copy small {
  color: var(--ds-gold-dark);
}

.ds-course-lesson-arrow {
  color: var(--ds-muted);
}

.ds-course-lesson-arrow .ds-icon {
  width: 14px;
  height: 14px;
}

.ds-course-v2[data-course-surface="study"] .ds-reader {
  max-width: 820px;
  margin: 0 auto;
}

.ds-course-v2[data-course-surface="study"] .ds-reader-head h1 {
  max-width: 720px;
  font-size: 42px;
}

.ds-course-v2[data-course-surface="study"] .ds-reader-actions {
  position: sticky;
  bottom: 0;
  z-index: 4;
  margin: 36px -18px -56px;
  border-top: 1px solid var(--ds-line);
  padding: 14px 18px;
  background: color-mix(in srgb, var(--ds-paper) 94%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

@keyframes ds-course-module-open {
  from {
    opacity: 0;
    transform: translate3d(0, -4px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@media (max-width: 1120px) {
  .ds-course-v2:not(.ds-access-state) .ds-course-top {
    grid-template-columns: minmax(220px, 1fr) auto;
    grid-template-rows: auto auto;
    align-items: center;
  }

  .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle {
    display: none;
  }

  .ds-course-v2:not(.ds-access-state) .ds-course-identity {
    grid-column: 1;
    grid-row: 1;
    border-bottom: 0;
    padding: 16px 20px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav {
    grid-column: 2;
    grid-row: 1;
    grid-template-columns: repeat(4, minmax(76px, 1fr));
    padding: 10px 14px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav button {
    justify-content: center;
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress {
    grid-column: 1 / -1;
    grid-row: 2;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    padding: 10px 20px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress strong {
    grid-row: auto;
    font-size: 16px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress small {
    grid-column: 3;
    grid-row: 1;
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress progress {
    grid-column: 2;
    grid-row: 1;
  }
}

@media (max-width: 760px) {
  .ds-course-overview-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .ds-course-overview-head .ds-home-copy h1 {
    font-size: 38px;
  }

  .ds-course-overview-progress {
    border-top: 1px solid var(--ds-line);
    border-left: 0;
    padding-top: 20px;
    padding-left: 0;
  }

  .ds-course-resume {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-course-resume-action {
    width: 100%;
  }

  .ds-course-module-summary {
    grid-template-columns: 40px minmax(0, 1fr) 82px 20px;
    gap: 12px;
  }

  .ds-course-module .ds-module-meta {
    display: none;
  }

  .ds-course-module-lessons {
    padding-left: 70px;
  }
}

@media (max-width: 680px) {
  .ds-course-v2:not(.ds-access-state) .ds-course-top {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto;
  }

  .ds-course-v2:not(.ds-access-state) .ds-course-identity {
    grid-column: 1;
    grid-row: 1;
    padding: 14px 16px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-course-identity img {
    width: 32px;
    height: 32px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav {
    grid-column: 1;
    grid-row: 2;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--ds-line);
    padding: 6px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav button {
    display: grid;
    justify-items: center;
    gap: 4px;
    min-width: 0;
    min-height: 48px;
    padding: 5px 2px;
    font-size: 9px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav button.is-active {
    box-shadow: inset 0 -3px 0 var(--ds-gold);
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress {
    display: none;
  }

  .ds-course-overview-identity .ds-home-icon {
    width: 42px;
    height: 42px;
  }

  .ds-course-overview-head .ds-home-copy h1 {
    font-size: 32px;
  }

  .ds-course-overview-head .ds-home-copy p {
    font-size: 15px;
  }

  .ds-course-resume {
    gap: 22px;
    margin-top: 22px;
    padding: 24px 20px 22px 24px;
  }

  .ds-course-resume-copy h2 {
    font-size: 21px;
  }

  .ds-course-v2[data-course-surface="overview"] .ds-section-head {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

  .ds-course-v2[data-course-surface="overview"] .ds-section-head .ds-action {
    width: auto;
    justify-self: start;
  }

  .ds-course-track-tabs button {
    display: flex;
    flex-direction: column;
    gap: 4px;
    justify-content: center;
    padding: 7px 4px;
    text-align: center;
  }

  .ds-course-track-tabs small {
    display: none;
  }

  .ds-course-track-tabs b {
    width: 100%;
    font-size: 10px;
    text-overflow: clip;
  }

  .ds-course-module-summary {
    grid-template-columns: 38px minmax(0, 1fr) 20px;
    min-height: 82px;
    padding: 12px;
  }

  .ds-course-module .ds-module-state,
  .ds-course-module .ds-module-meta {
    display: none;
  }

  .ds-course-module .ds-module-copy small {
    -webkit-line-clamp: 2;
  }

  .ds-course-module:not([open]) .ds-module-copy small {
    display: none;
  }

  .ds-course-module-lessons {
    padding: 0 12px 7px;
  }

  .ds-course-module-lessons a {
    min-height: 60px;
  }

  .ds-course-lesson-copy strong {
    white-space: normal;
  }

  .ds-course-v2[data-course-surface="study"] .ds-reader-head h1 {
    font-size: 32px;
  }

  .ds-course-v2[data-course-surface="study"] .ds-reader-actions {
    position: static;
    margin: 30px 0 0;
    padding: 16px 0 0;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

.ds-course-v2 {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 0;
  min-height: calc(100svh - var(--nav-h, 68px) - 40px);
  margin: 24px auto 56px;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper);
  box-shadow: var(--ds-shell-shadow);
}

.ds-course-v2.ds-access-state {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  width: min(100vw - 48px, 1240px);
  min-height: calc(100svh - var(--nav-h, 68px) - 40px);
  padding: 0;
  overflow: hidden;
  text-align: left;
  background: var(--ds-paper);
}

.ds-access-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 12px;
  border: 1px solid color-mix(in srgb, var(--ds-accent-dark) 16%, transparent);
  border-radius: 4px;
  background: color-mix(in srgb, var(--ds-accent) 8%, transparent);
  color: var(--ds-accent-dark);
  font-size: 11px;
  font-weight: 850;
  line-height: 1;
  text-transform: uppercase;
}

.ds-access-shell .ds-access-course-rail {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100%;
  border-right: 1px solid var(--ds-line);
  background: var(--ds-paper-soft);
}

.ds-access-course-identity {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-access-course-identity img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.ds-access-course-identity strong,
.ds-access-course-identity small {
  display: block;
}

.ds-access-course-identity strong {
  overflow: hidden;
  color: var(--ds-ink);
  font-size: 15px;
  font-weight: 780;
  line-height: 1.15;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ds-access-course-identity small {
  margin-top: 4px;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 650;
}

.ds-access-course-nav {
  display: grid;
  align-content: start;
  gap: 4px;
  padding: 18px 10px;
}

.ds-access-course-nav > span {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 0 14px;
  color: var(--ds-muted);
}

.ds-access-course-nav > span.is-current {
  border-color: color-mix(in srgb, var(--ds-accent) 18%, transparent);
  background: var(--ds-paper);
  color: var(--ds-accent-dark);
  box-shadow: inset 3px 0 0 var(--ds-accent);
}

.ds-access-course-nav i,
.ds-access-status-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ds-access-course-nav .ds-icon {
  width: 17px;
  height: 17px;
}

.ds-access-course-nav b {
  font-size: 12px;
  font-weight: 700;
}

.ds-access-course-progress {
  display: grid;
  gap: 10px;
  padding: 18px 20px 22px;
  border-top: 1px solid var(--ds-line);
  color: var(--ds-muted);
  font-size: 11px;
  font-weight: 760;
}

.ds-access-course-progress i {
  display: block;
  width: 100%;
  height: 4px;
  background: var(--ds-line);
}

.ds-access-shell-main {
  position: relative;
  min-width: 0;
  padding: 34px 44px 42px;
  overflow: hidden;
}

.ds-access-status {
  display: grid;
  grid-template-columns: 38px minmax(180px, 1fr) minmax(270px, 360px);
  align-items: center;
  gap: 14px;
  min-height: 62px;
  border-bottom: 1px solid var(--ds-line);
  padding-bottom: 18px;
  opacity: 0;
  transform: translate3d(0, -6px, 0);
  animation: ds-access-status-in 180ms ease 250ms forwards;
}

.ds-access-status-icon {
  width: 38px;
  height: 38px;
  border: 1px solid color-mix(in srgb, var(--ds-accent) 28%, transparent);
  border-radius: 7px;
  background: color-mix(in srgb, var(--ds-accent) 9%, var(--ds-paper));
  color: var(--ds-accent-dark);
}

.ds-access-status-icon .ds-icon {
  width: 18px;
  height: 18px;
}

.ds-access-status strong,
.ds-access-status small {
  display: block;
}

.ds-access-status strong {
  color: var(--ds-ink);
  font-size: 14px;
  font-weight: 780;
}

.ds-access-status small {
  margin-top: 4px;
  color: var(--ds-muted);
  font-size: 12px;
}

.ds-access-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ds-access-steps li {
  display: grid;
  gap: 7px;
  color: var(--ds-muted);
}

.ds-access-steps li > span {
  display: block;
  height: 3px;
  background: var(--ds-line);
}

.ds-access-steps li.is-complete > span,
.ds-access-steps li.is-active > span {
  background: var(--ds-accent);
}

.ds-access-steps li.is-active > span {
  animation: ds-access-stage-pulse 900ms ease-in-out infinite alternate;
}

.ds-access-steps b {
  font-size: 10px;
  font-weight: 750;
}

.ds-access-steps li.is-active b {
  color: var(--ds-accent-dark);
}

.ds-access-shell-head {
  padding: 34px 0 30px;
}

.ds-access-shell-head > span {
  color: var(--ds-accent-dark);
  font-size: 11px;
  font-weight: 780;
  text-transform: uppercase;
}

.ds-access-shell-head h1 {
  max-width: 18ch;
  margin: 8px 0 16px;
  color: var(--ds-ink);
  font-size: 42px;
  font-weight: 820;
  line-height: 1.04;
  letter-spacing: 0;
}

.ds-access-skeleton-line,
.ds-access-skeleton-block,
.ds-access-skeleton-row {
  background: var(--ds-line);
}

.ds-access-skeleton-line {
  width: 100%;
  height: 10px;
}

.ds-access-skeleton-line-lead {
  width: min(100%, 520px);
}

.ds-access-skeleton-line-kicker {
  width: 84px;
  height: 7px;
}

.ds-access-skeleton-line-title {
  width: min(88%, 560px);
  height: 24px;
  margin: 18px 0 24px;
}

.ds-access-skeleton-line-short {
  width: 68%;
  margin-top: 12px;
}

.ds-access-skeleton-content {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 28px;
  overflow: hidden;
}

.ds-access-skeleton-content::after {
  content: "";
  position: absolute;
  inset: -20% auto -20% -90px;
  width: 72px;
  background: color-mix(in srgb, var(--ds-paper) 66%, transparent);
  opacity: 0.64;
  transform: translate3d(0, 0, 0) rotate(8deg);
  animation: ds-access-skeleton-sweep 1450ms ease-in-out 220ms infinite;
  pointer-events: none;
}

.ds-access-skeleton-reader,
.ds-access-skeleton-aside {
  min-width: 0;
  border-top: 1px solid var(--ds-line);
  padding-top: 24px;
}

.ds-access-skeleton-block {
  height: 126px;
  margin-top: 28px;
}

.ds-access-skeleton-aside {
  display: grid;
  align-content: start;
  gap: 16px;
  border-left: 1px solid var(--ds-line);
  padding-left: 24px;
}

.ds-access-skeleton-row {
  height: 52px;
}

.ds-access-slow-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 30px;
  border-top: 1px solid var(--ds-line);
  padding-top: 22px;
}

.ds-access-slow-note strong {
  color: var(--ds-ink);
  font-size: 14px;
}

.ds-access-slow-note p {
  max-width: 560px;
  margin: 5px 0 0;
  color: var(--ds-muted);
  font-size: 12px;
  line-height: 1.5;
}

.ds-access-slow-actions {
  display: flex;
  gap: 8px;
}

.ds-access-slow-actions .ds-action {
  min-height: 40px;
  white-space: nowrap;
}

.ds-access-locked-main {
  position: relative;
  display: grid;
  align-content: center;
  justify-items: start;
  min-width: 0;
  overflow: hidden;
  padding: 64px;
}

.ds-access-locked-main h1 {
  max-width: 14ch;
  margin: 20px 0 18px;
  color: var(--ds-ink);
  font-size: 52px;
  font-weight: 840;
  line-height: 1.02;
  letter-spacing: 0;
}

.ds-access-locked-main .ds-lead {
  max-width: 620px;
  margin: 0;
  color: var(--ds-muted);
  font-size: 18px;
  line-height: 1.65;
}

.ds-access-locked-main .ds-surface-actions {
  margin-top: 30px;
}

.ds-access-pro-mark {
  position: absolute;
  right: 34px;
  bottom: -18px;
  color: var(--ds-line);
  font-size: 148px;
  font-weight: 880;
  line-height: 1;
  pointer-events: none;
}

@keyframes ds-access-status-in {
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes ds-access-stage-pulse {
  from {
    opacity: 0.42;
    transform: scaleX(0.45);
    transform-origin: left;
  }
  to {
    opacity: 1;
    transform: scaleX(1);
    transform-origin: left;
  }
}

@keyframes ds-access-skeleton-sweep {
  from {
    transform: translate3d(0, 0, 0) rotate(8deg);
  }
  to {
    transform: translate3d(1180px, 0, 0) rotate(8deg);
  }
}

body.course-access-checking #epso-cookie-banner,
body.course-access-locked #epso-cookie-banner {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.ds-course-v2 > .ds-home-shell,
.ds-course-v2 > .ds-study-layout,
.ds-course-v2 > .ds-practice-shell,
.ds-course-v2 > .ds-progress-shell {
  grid-column: 2;
  min-width: 0;
  padding: 34px clamp(28px, 4vw, 48px) 42px;
}

.ds-course-top {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto auto;
  gap: 0;
  align-self: stretch;
  align-items: start;
  min-height: 100%;
  padding: 0;
  border-right: 1px solid var(--ds-line);
  border-bottom: 0;
  background: var(--ds-paper-soft);
}

.ds-course-identity {
  width: 100%;
  padding: 22px 20px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-course-identity img {
  width: 38px;
  height: 38px;
}

.ds-surface-nav {
  display: grid;
  grid-template-columns: 1fr;
  justify-self: stretch;
  gap: 4px;
  padding: 18px 10px;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.ds-surface-nav button {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 7px;
  text-align: left;
}

.ds-surface-nav button.is-active {
  background: color-mix(in srgb, var(--ds-accent) 10%, var(--ds-paper));
  color: var(--ds-accent-dark);
  box-shadow: inset 3px 0 0 var(--ds-accent);
}

.ds-side-resource {
  justify-self: stretch;
  margin: 0 10px 18px;
  border-color: transparent;
  background: transparent;
  color: var(--ds-muted);
  justify-content: flex-start;
}

.ds-top-progress {
  justify-self: stretch;
  width: auto;
  padding: 18px 20px 22px;
  border-top: 1px solid var(--ds-line);
}

.ds-top-progress strong {
  text-align: left;
}

.ds-home-shell,
.ds-practice-shell,
.ds-progress-shell {
  padding-top: 34px;
}

.ds-home-hero {
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(28px, 5vw, 72px);
  min-height: 260px;
  padding: 0 0 34px;
  align-items: center;
}

.ds-home-icon {
  display: block;
  width: 72px;
  height: 72px;
  margin-bottom: 18px;
  object-fit: contain;
}

.ds-home-copy h1 {
  font-size: clamp(44px, 5vw, 72px);
}

.ds-home-next {
  padding: 22px;
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper-soft);
}

.ds-section-head {
  padding-top: 28px;
}

.ds-module-row {
  grid-template-columns: 44px minmax(0, 1fr) 120px minmax(160px, 230px);
  min-height: 88px;
  padding: 16px 0;
}

.ds-study-layout {
  display: grid;
  grid-template-columns: minmax(210px, 260px) minmax(0, 760px) minmax(240px, 290px);
  gap: 0;
  align-items: stretch;
  padding: 0;
}

.ds-course-v2 > .ds-study-layout {
  padding: 0;
}

.ds-syllabus,
.ds-study-panel {
  position: relative;
  top: auto;
  min-height: calc(100svh - var(--nav-h, 68px) - 42px);
  padding: 24px 20px;
  background: var(--ds-paper-soft);
}

.ds-syllabus {
  border-right: 1px solid var(--ds-line);
}

.ds-study-panel {
  align-content: start;
  border-left: 1px solid var(--ds-line);
}

.ds-reader {
  padding: 32px clamp(26px, 4vw, 42px) 88px;
}

.ds-reader-head h1,
.ds-practice-main h1,
.ds-progress-main h1 {
  font-size: clamp(34px, 4vw, 54px);
}

.ds-reader-block,
.ds-learning-block {
  padding: 26px 0;
}

.ds-panel-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-panel-tabs button {
  min-height: 42px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--ds-muted);
  font-size: 13px;
  font-weight: 780;
  cursor: default;
}

.ds-panel-tabs button.is-active {
  border-bottom-color: var(--ds-accent);
  color: var(--ds-accent-dark);
}

.ds-note-block {
  border-top: 0;
  padding-top: 0;
}

.ds-practice-shell {
  grid-template-columns: 132px minmax(0, 780px);
  justify-content: center;
  gap: clamp(30px, 5vw, 72px);
}

.ds-practice-aside {
  grid-column: 1;
  grid-row: 1;
}

.ds-practice-main {
  grid-column: 2;
  grid-row: 1;
}

.ds-practice-rail-card {
  display: grid;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--ds-line);
}

.ds-practice-rail-card > span {
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 780;
}

.ds-practice-rail-card > strong {
  color: var(--ds-ink);
  font-size: 22px;
  font-weight: 840;
}

.ds-practice-rail {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ds-practice-rail li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ds-muted);
}

.ds-practice-rail li::after {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--ds-line);
}

.ds-practice-rail li span {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--ds-line-strong);
  border-radius: 50%;
  background: var(--ds-paper);
  font-size: 12px;
  font-weight: 780;
}

.ds-practice-rail li.is-answered span {
  border-color: color-mix(in srgb, var(--ds-accent) 50%, transparent);
  color: var(--ds-accent-dark);
}

.ds-practice-rail li.is-current span {
  border-color: var(--ds-accent);
  background: var(--ds-accent);
  color: var(--ds-paper);
}

.ds-practice-progress {
  display: none;
}

.ds-question-box {
  margin-top: 38px;
}

.ds-progress-shell {
  grid-template-columns: minmax(0, 1fr) minmax(250px, 330px);
}

.ds-progress-list,
.ds-progress-aside .ds-aside-block {
  border: 1px solid var(--ds-line);
  border-radius: 8px;
  background: var(--ds-paper-soft);
}

.ds-progress-list > div {
  padding: 18px;
}

.ds-progress-list > div:last-child {
  border-bottom: 0;
}

.ds-course-v2.is-focus {
  grid-template-columns: minmax(0, 1fr);
  width: min(100vw - 48px, 980px);
}

.ds-course-v2.is-focus .ds-course-top,
.ds-course-v2.is-focus .ds-syllabus,
.ds-course-v2.is-focus .ds-study-panel {
  display: none;
}

.ds-course-v2.is-focus > .ds-study-layout {
  grid-column: 1;
  grid-template-columns: minmax(0, 840px);
  justify-content: center;
}

@media (max-width: 1120px) {
  .ds-course-v2 {
    grid-template-columns: 1fr;
  }

  .ds-course-v2 > .ds-home-shell,
  .ds-course-v2 > .ds-study-layout,
  .ds-course-v2 > .ds-practice-shell,
  .ds-course-v2 > .ds-progress-shell {
    grid-column: 1;
  }

  .ds-course-top {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--ds-line);
  }

  .ds-surface-nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .ds-study-layout,
  .ds-course-v2.is-focus > .ds-study-layout,
  .ds-practice-shell,
  .ds-progress-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-syllabus,
  .ds-study-panel {
    min-height: 0;
    border: 0;
    border-top: 1px solid var(--ds-line);
  }

  .ds-practice-aside,
  .ds-practice-main {
    grid-column: auto;
    grid-row: auto;
  }

  .ds-practice-rail {
    grid-template-columns: repeat(5, 28px);
  }

  .ds-practice-rail li::after {
    display: none;
  }
}

@media (max-width: 680px) {
  .ds-course-v2 {
    width: min(100vw - 18px, 860px);
    margin-top: 12px;
  }

  .ds-course-v2 > .ds-home-shell,
  .ds-course-v2 > .ds-practice-shell,
  .ds-course-v2 > .ds-progress-shell {
    padding: 24px 18px 30px;
  }

  .ds-home-hero,
  .ds-module-row {
    grid-template-columns: 1fr;
  }

  .ds-surface-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ds-surface-nav button {
    min-height: 38px;
    justify-content: center;
    text-align: center;
  }

  .ds-reader {
    padding: 26px 18px 52px;
  }

  .ds-action {
    width: 100%;
  }
}

/* Course rails: icons, collapsible navigation, module internals */
.ds-icon {
  display: block;
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 18px;
}

.ds-course-top {
  grid-template-rows: auto auto 1fr auto;
}

.ds-rail-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--ds-line);
  border-radius: 7px;
  background: var(--ds-paper);
  color: var(--ds-muted);
  font: 760 12px/1 Inter, ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0;
  cursor: pointer;
}

.ds-main-rail-toggle {
  justify-self: end;
  margin: 10px 10px 0;
}

.ds-rail-toggle:hover,
.ds-rail-toggle:focus-visible {
  border-color: var(--ds-line-strong);
  color: var(--ds-ink);
}

.ds-nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: inherit;
}

.ds-surface-nav button {
  gap: 10px;
}

.ds-course-v2.is-main-collapsed {
  grid-template-columns: 64px minmax(0, 1fr);
}

.ds-course-v2.is-main-collapsed .ds-course-identity {
  justify-content: center;
  grid-template-columns: 34px;
  padding: 16px 0;
}

.ds-course-v2.is-main-collapsed .ds-course-identity-copy,
.ds-course-v2.is-main-collapsed .ds-nav-label,
.ds-course-v2.is-main-collapsed .ds-toggle-label,
.ds-course-v2.is-main-collapsed .ds-top-progress {
  display: none;
}

.ds-course-v2.is-main-collapsed .ds-main-rail-toggle {
  justify-self: center;
  width: 38px;
  padding: 0;
  margin: 10px auto 0;
}

.ds-course-v2.is-main-collapsed .ds-surface-nav {
  padding: 14px 8px;
}

.ds-course-v2.is-main-collapsed .ds-surface-nav button {
  justify-content: center;
  padding: 0;
}

.ds-module-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  min-height: 0;
  padding: 0;
}

.ds-module-main {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 116px minmax(160px, 220px);
  gap: 18px;
  align-items: center;
  min-height: 92px;
  padding: 18px 0;
  color: inherit;
  text-decoration: none;
}

.ds-module-main:hover .ds-module-copy strong {
  color: var(--ds-accent-dark);
}

.ds-module-index {
  display: inline-grid;
  grid-template-rows: 18px 1fr;
  gap: 2px;
  align-items: center;
  justify-items: center;
}

.ds-module-index .ds-icon {
  width: 16px;
  height: 16px;
}

.ds-module-index b {
  font-size: 11px;
  font-weight: 820;
  line-height: 1;
}

.ds-module-lessons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 16px;
  margin: -2px 0 18px 66px;
  padding: 12px 0 0;
  border-top: 1px solid color-mix(in srgb, var(--ds-ink) 8%, transparent);
  list-style: none;
}

.ds-module-lessons a {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  min-height: 28px;
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
}

.ds-module-lessons a:hover {
  color: var(--ds-accent-dark);
}

.ds-module-lessons .ds-icon {
  width: 14px;
  height: 14px;
}

.ds-study-layout {
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
}

.ds-syllabus {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 16px;
}

.ds-syllabus-toggle {
  justify-self: end;
}

.ds-syllabus-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  padding-top: 2px;
  border-top: 1px solid var(--ds-line);
  color: var(--ds-ink);
  font-size: 13px;
  font-weight: 830;
}

.ds-syllabus-title span {
  color: var(--ds-muted);
  font-size: 12px;
  font-weight: 760;
}

.ds-syllabus details {
  border-top: 0;
  padding-top: 0;
}

.ds-syllabus summary::-webkit-details-marker {
  display: none;
}

.ds-syllabus summary {
  list-style: none;
}

.ds-syllabus-scroll {
  max-height: calc(100svh - var(--nav-h, 68px) - 150px);
}

.ds-course-v2.is-syllabus-collapsed .ds-study-layout {
  grid-template-columns: 58px minmax(0, 1fr);
}

.ds-course-v2.is-syllabus-collapsed .ds-syllabus {
  padding: 12px 8px;
  justify-items: center;
}

.ds-course-v2.is-syllabus-collapsed .ds-syllabus-inner,
.ds-course-v2.is-syllabus-collapsed .ds-syllabus-toggle .ds-toggle-label {
  display: none;
}

.ds-course-v2.is-syllabus-collapsed .ds-syllabus-toggle {
  width: 38px;
  padding: 0;
}

.ds-reader {
  max-width: 980px;
  width: 100%;
}

.ds-course-v2.is-main-collapsed .ds-reader,
.ds-course-v2.is-syllabus-collapsed .ds-reader {
  max-width: 1040px;
}

.ds-study-panel,
.ds-panel-tabs,
.ds-note-block {
  display: none !important;
}

@media (max-width: 1120px) {
  .ds-course-v2.is-main-collapsed,
  .ds-course-v2 {
    grid-template-columns: 1fr;
  }

  .ds-course-v2.is-main-collapsed .ds-course-identity-copy,
  .ds-course-v2.is-main-collapsed .ds-nav-label,
  .ds-course-v2.is-main-collapsed .ds-top-progress {
    display: block;
  }

  .ds-course-v2.is-main-collapsed .ds-course-identity {
    justify-content: flex-start;
    grid-template-columns: 34px minmax(0, 1fr);
    padding: 18px 20px;
  }

  .ds-course-v2.is-main-collapsed .ds-surface-nav button {
    justify-content: flex-start;
    padding: 0 12px;
  }

  .ds-study-layout,
  .ds-course-v2.is-syllabus-collapsed .ds-study-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-course-v2.is-syllabus-collapsed .ds-syllabus-inner {
    display: block;
  }

  .ds-module-main {
    grid-template-columns: 44px minmax(0, 1fr) 100px;
  }

  .ds-module-lessons {
    margin-left: 62px;
  }
}

@media (max-width: 680px) {
  .ds-module-main {
    grid-template-columns: 38px minmax(0, 1fr);
    align-items: start;
    gap: 12px;
  }

  .ds-module-state,
  .ds-module-next {
    grid-column: 2;
  }

  .ds-module-lessons {
    grid-template-columns: 1fr;
    margin-left: 50px;
  }

  .ds-surface-nav button {
    gap: 7px;
  }

  .ds-rich-callout,
  .ds-doc-note,
  .ds-mini-card,
  .ds-step-list li {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-doc-flow {
    gap: 16px;
  }

  .ds-doc-heading-2 {
    width: auto;
    font-size: 19px;
  }

  .ds-doc-heading-3 {
    width: auto;
  }

  .ds-doc-paragraph p,
  .ds-doc-note p {
    font-size: 15px;
    line-height: 1.68;
  }

  .ds-doc-table {
    min-width: 560px;
  }

  .ds-card-grid,
  .ds-quality-grid,
  .ds-dossier-list,
  .ds-task-map,
  .ds-compare-head,
  .ds-compare-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-compare-row p + p,
  .ds-compare-head span + span {
    border-left: 0;
    border-top: 1px solid var(--ds-line);
  }

  .ds-rich-panel h3 {
    width: auto;
  }
}

/* Generic course app shell for every course */
body.course-study-app {
  background: var(--ds-bg);
}

body.course-study-app .site-footer,
body.course-study-app .legal-footer,
body.course-study-app #epso-whatsapp-cta {
  display: none;
}

html body.course-study-focus .eu-ticker {
  display: none !important;
  visibility: hidden !important;
  min-height: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
}

body.course-study-focus .nav-links,
body.course-study-focus .nav-actions > :not(.nav-locale-wrap):not(.nav-burger) {
  visibility: hidden !important;
  pointer-events: none !important;
}

/* Course visual refresh */
body.course-study-app {
  background:
    linear-gradient(180deg, var(--ds-bg-top) 0%, var(--ds-bg-bottom) 100%);
  font-family: var(--course-ui-font);
}

.ds-course-v2 {
  border-color: var(--ds-line-soft);
  background: var(--ds-paper);
  box-shadow: var(--ds-shell-shadow);
  font-family: var(--course-ui-font);
}

.ds-course-v2,
.ds-course-v2 button,
.ds-course-v2 input,
.ds-course-v2 textarea {
  font-family: var(--course-ui-font);
}

.ds-course-top,
.ds-syllabus,
.ds-study-panel,
.ds-home-next,
.ds-progress-aside .ds-aside-block {
  background: linear-gradient(180deg, var(--ds-paper-glint) 0%, var(--ds-panel-bottom) 100%);
}

.ds-course-identity {
  padding: 24px 20px;
}

.ds-course-identity strong {
  font-size: 16px;
  font-weight: 760;
  line-height: 1.18;
}

.ds-course-identity small,
.ds-syllabus-title span,
.ds-unit-head small,
.ds-reader-meta span {
  color: var(--ds-text-meta);
  font-weight: 650;
}

.ds-surface-nav {
  padding: 16px 10px;
}

.ds-surface-nav button,
.ds-action,
.ds-focus-toggle,
.ds-lesson-link {
  font-family: var(--course-ui-font);
  font-weight: 700;
}

.ds-surface-nav button {
  min-height: 44px;
  border: 1px solid transparent;
  color: var(--ds-muted-strong);
}

.ds-surface-nav button:hover {
  border-color: color-mix(in srgb, var(--ds-accent) 14%, transparent);
  background: var(--ds-paper);
  color: var(--ds-ink);
}

.ds-surface-nav button.is-active {
  border-color: color-mix(in srgb, var(--ds-accent) 18%, transparent);
  background: var(--ds-paper);
  color: var(--ds-accent-dark);
  box-shadow:
    inset 3px 0 0 var(--ds-accent),
    0 8px 22px color-mix(in srgb, var(--ds-ink) 6%, transparent);
}

.ds-top-progress progress::-webkit-progress-value,
.ds-home-next progress::-webkit-progress-value,
.ds-progress-list progress::-webkit-progress-value,
.ds-practice-progress progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--ds-accent) 0%, var(--ds-gold) 100%);
}

.ds-study-layout {
  background: linear-gradient(90deg, var(--ds-paper-soft) 0, var(--ds-paper) 25%, var(--ds-paper) 75%, var(--ds-paper-soft) 100%);
}

.ds-syllabus-title,
.ds-syllabus summary {
  font-family: var(--course-ui-font);
  font-weight: 720;
}

.ds-syllabus-title strong {
  color: var(--ds-heading);
  font-size: 14px;
  font-weight: 720;
}

.ds-unit {
  padding: 14px 0;
}

.ds-unit-head > span {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid color-mix(in srgb, var(--ds-accent) 16%, transparent);
  border-radius: 8px;
  background: var(--ds-paper);
  color: var(--ds-accent-dark);
  line-height: 1;
}

.ds-unit-head strong {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.32;
}

.ds-unit-lessons {
  gap: 5px;
}

.ds-lesson-link {
  min-height: 36px;
  padding: 7px 9px;
  border: 1px solid transparent;
  color: var(--ds-muted-strong);
  font-size: 12px;
  font-weight: 640;
  line-height: 1.28;
}

.ds-lesson-link span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ds-muted-soft);
  line-height: 1.15;
}

.ds-lesson-link:hover,
.ds-lesson-link.is-active {
  border-color: color-mix(in srgb, var(--ds-accent) 14%, transparent);
  background: var(--ds-paper);
  color: var(--ds-ink);
  box-shadow:
    inset 3px 0 0 var(--ds-accent),
    0 8px 18px color-mix(in srgb, var(--ds-ink) 5%, transparent);
}

.ds-reader {
  background:
    linear-gradient(180deg, var(--ds-paper) 0%, var(--ds-paper) 64%, var(--ds-paper-glint) 100%);
}

.ds-reader-head {
  margin-bottom: 30px;
  padding: 28px clamp(22px, 3vw, 34px) 30px;
  border: 1px solid var(--ds-line-soft);
  border-radius: 8px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--ds-accent) 8%, transparent) 0%, color-mix(in srgb, var(--ds-gold) 9%, transparent) 46%, color-mix(in srgb, var(--ds-paper) 92%, transparent) 100%),
    var(--ds-paper);
  box-shadow: 0 18px 44px color-mix(in srgb, var(--ds-ink) 8%, transparent);
}

.ds-home-copy h1,
.ds-reader-head h1,
.ds-practice-main h1,
.ds-progress-main h1 {
  font-family: var(--course-display-font);
  color: var(--ds-ink);
  font-size: clamp(34px, 3.8vw, 50px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0;
}

.ds-reader-head > span,
.ds-home-copy span,
.ds-section-head span,
.ds-question-box > span,
.ds-kicker,
.ds-progress-main > span,
.ds-source-row span,
.ds-home-next > span {
  color: var(--ds-accent-dark);
  font-family: var(--course-ui-font);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0;
}

.ds-reader-head p,
.ds-home-copy p,
.ds-lead {
  color: var(--ds-lead);
  font-family: var(--course-ui-font);
  font-size: 18px;
  line-height: 1.62;
}

.ds-reader-meta {
  gap: 10px;
}

.ds-reader-meta span,
.ds-focus-toggle {
  min-height: 32px;
  padding: 7px 11px;
  border: 1px solid var(--ds-line-soft);
  border-radius: 8px;
  background: color-mix(in srgb, var(--ds-paper) 72%, transparent);
}

.ds-document-paper {
  padding-top: 0;
}

.ds-doc-flow {
  gap: 22px;
}

.ds-doc-heading {
  width: auto;
  color: var(--ds-ink);
  font-family: var(--course-display-font);
  font-weight: 720;
  letter-spacing: 0;
  text-decoration: none;
}

.ds-doc-heading-2 {
  position: relative;
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
  padding-bottom: 10px;
  border-bottom: 0;
  font-size: 25px;
  line-height: 1.22;
}

.ds-doc-heading-2::before {
  content: "";
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  border-radius: 3px;
  background-color: var(--ds-accent);
  background-image: linear-gradient(135deg, var(--ds-accent) 0%, var(--ds-gold) 100%);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--ds-accent) 8%, transparent);
}

.ds-doc-heading-2::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--ds-accent) 50%, transparent), color-mix(in srgb, var(--ds-gold) 42%, transparent), var(--ds-line-faint));
}

.ds-doc-heading-3 {
  margin-top: 8px;
  color: var(--ds-heading);
  font-size: 18px;
  line-height: 1.28;
}

.ds-doc-heading-4 {
  margin-top: 2px;
  color: var(--ds-accent-dark);
  font-size: 13px;
  font-weight: 760;
  line-height: 1.28;
  text-transform: uppercase;
}

.ds-doc-paragraph p {
  max-width: 72ch;
  color: var(--ds-reading);
  font-family: var(--course-reading-font);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.78;
}

.ds-doc-list {
  gap: 10px;
  max-width: 72ch;
  color: var(--ds-reading);
  font-family: var(--course-reading-font);
  font-size: 17px;
  line-height: 1.68;
}

.ds-doc-list li {
  padding-left: 4px;
}

.ds-doc-list li::marker {
  color: var(--ds-accent-dark);
  font-family: var(--course-ui-font);
  font-weight: 900;
}

.ds-doc-meta-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 18px;
  border-color: color-mix(in srgb, var(--ds-accent) 16%, transparent);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--ds-accent) 8%, transparent), color-mix(in srgb, var(--ds-gold) 8%, transparent)),
    var(--ds-paper);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--ds-ink) 6%, transparent);
}

.ds-doc-meta-grid p {
  padding: 12px;
  border: 1px solid var(--ds-line-faint);
  border-radius: 8px;
  background: color-mix(in srgb, var(--ds-paper) 72%, transparent);
  color: var(--ds-text-body);
  font-family: var(--course-ui-font);
  font-size: 13px;
  font-weight: 640;
}

.ds-doc-note {
  grid-template-columns: 42px minmax(0, 1fr);
  padding: 18px;
  border-color: color-mix(in srgb, var(--ds-accent) 18%, transparent);
  border-left: 4px solid var(--ds-accent);
  background: var(--ds-paper);
  box-shadow: 0 16px 34px color-mix(in srgb, var(--ds-ink) 8%, transparent);
}

.ds-doc-note-icon {
  border-color: color-mix(in srgb, var(--ds-accent) 18%, transparent);
  background: var(--ds-success-soft);
  color: var(--ds-accent-dark);
}

.ds-doc-note h3 {
  color: var(--ds-ink);
  font-family: var(--course-ui-font);
  font-size: 12px;
  font-weight: 760;
}

.ds-doc-note p {
  color: var(--ds-text-body);
  font-family: var(--course-reading-font);
  font-size: 17px;
  line-height: 1.72;
}

.ds-doc-table-wrap {
  border-color: var(--ds-line);
  background: var(--ds-paper);
  box-shadow: 0 14px 34px color-mix(in srgb, var(--ds-ink) 7%, transparent);
}

.ds-doc-table th,
.ds-doc-table td {
  padding: 15px 16px;
  border-color: var(--ds-line-soft);
}

.ds-doc-table tr.is-header th {
  background: var(--ds-heading);
}

.ds-doc-table th p {
  color: var(--ds-paper);
  font-family: var(--course-ui-font);
  font-size: 12px;
  font-weight: 720;
  line-height: 1.35;
}

.ds-doc-table td p {
  color: var(--ds-table-text);
  font-family: var(--course-ui-font);
  font-size: 14px;
  line-height: 1.58;
}

.ds-doc-table tbody tr:nth-child(odd):not(.is-header) td {
  background: var(--ds-paper-glint);
}

.ds-action {
  min-height: 42px;
  border-color: var(--ds-line-emphasis);
  border-radius: 8px;
  background: var(--ds-paper);
  box-shadow: 0 8px 18px color-mix(in srgb, var(--ds-ink) 5%, transparent);
}

.ds-action-primary {
  border-color: var(--ds-heading);
  background: var(--ds-heading);
  color: var(--ds-paper);
}

.ds-action:hover {
  transform: translateY(-1px);
}

@media (max-width: 680px) {
  .ds-course-v2 {
    box-shadow: 0 12px 38px color-mix(in srgb, var(--ds-ink) 12%, transparent);
  }

  .ds-reader-head {
    padding: 24px 18px;
  }

  .ds-home-copy h1,
  .ds-reader-head h1,
  .ds-practice-main h1,
  .ds-progress-main h1 {
    font-size: 30px;
    line-height: 1.1;
  }

  .ds-doc-meta-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-doc-paragraph p,
  .ds-doc-note p,
  .ds-doc-list {
    font-size: 16px;
    line-height: 1.68;
  }

  .ds-doc-heading-2 {
    font-size: 21px;
  }

  .ds-doc-heading-2::before {
    width: 9px;
    height: 9px;
  }

  .ds-doc-table-wrap {
    overflow: visible;
  }

  .ds-doc-table {
    min-width: 0;
    border-collapse: separate;
    border-spacing: 0;
  }

  .ds-doc-table tbody,
  .ds-doc-table tr,
  .ds-doc-table td {
    display: block;
    width: 100%;
  }

  .ds-doc-table tr.is-header {
    display: none;
  }

  .ds-doc-table tr:not(.is-header) {
    margin-bottom: 12px;
    overflow: hidden;
    border: 1px solid var(--ds-line-soft);
    border-radius: 8px;
    background: var(--ds-paper);
    box-shadow: 0 8px 20px color-mix(in srgb, var(--ds-ink) 4%, transparent);
  }

  .ds-doc-table tr:not(.is-header):last-child {
    margin-bottom: 0;
  }

  .ds-doc-table td {
    display: grid;
    grid-template-columns: minmax(84px, 34%) minmax(0, 1fr);
    gap: 10px;
    padding: 11px 12px;
    border: 0;
    border-top: 1px solid var(--ds-line-faint);
  }

  .ds-doc-table td:first-child {
    border-top: 0;
  }

  .ds-doc-table td::before {
    content: attr(data-label);
    color: var(--ds-accent-dark);
    font-family: var(--course-ui-font);
    font-size: 10px;
    font-weight: 760;
    line-height: 1.3;
    text-transform: uppercase;
  }

  .ds-doc-table td p {
    font-size: 13px;
    line-height: 1.48;
    overflow-wrap: anywhere;
  }
}

@media (max-width: 1120px) {
  .ds-course-v2.ds-access-state {
    grid-template-columns: 1fr;
  }

  .ds-access-shell .ds-access-course-rail {
    grid-template-columns: minmax(0, 1fr) 190px;
    grid-template-rows: auto;
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--ds-line);
  }

  .ds-access-course-identity {
    border-bottom: 0;
  }

  .ds-access-course-nav {
    display: none;
  }

  .ds-access-course-progress {
    align-self: center;
    border-top: 0;
  }

  .ds-access-shell-main,
  .ds-access-locked-main {
    grid-column: 1;
  }
}

@media (max-width: 680px) {
  .ds-course-v2.ds-access-state {
    width: calc(100vw - 20px);
    min-height: calc(100svh - var(--nav-h, 68px) - 28px);
    margin: 10px auto 30px;
  }

  .ds-access-shell .ds-access-course-rail {
    grid-template-columns: 1fr;
  }

  .ds-access-course-identity {
    padding: 18px;
  }

  .ds-access-course-progress {
    display: none;
  }

  .ds-access-shell-main {
    padding: 24px 20px 30px;
  }

  .ds-access-status {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 11px;
  }

  .ds-access-status-icon {
    width: 34px;
    height: 34px;
  }

  .ds-access-steps {
    grid-column: 1 / -1;
    margin-top: 8px;
  }

  .ds-access-shell-head {
    padding: 28px 0 24px;
  }

  .ds-access-shell-head h1 {
    font-size: 34px;
  }

  .ds-access-skeleton-content {
    grid-template-columns: 1fr;
  }

  .ds-access-skeleton-aside {
    display: none;
  }

  .ds-access-slow-note {
    display: grid;
  }

  .ds-access-slow-actions,
  .ds-access-slow-actions .ds-action {
    width: 100%;
  }

  .ds-access-locked-main {
    min-height: 520px;
    padding: 42px 24px;
  }

  .ds-access-locked-main h1 {
    font-size: 38px;
  }

  .ds-access-locked-main .ds-lead {
    font-size: 16px;
  }

  .ds-access-pro-mark {
    right: 18px;
    font-size: 96px;
  }
}

@media (max-width: 420px) {
  .ds-access-slow-actions,
  .ds-access-locked-main .ds-surface-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .ds-access-slow-actions .ds-action,
  .ds-access-locked-main .ds-action {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ds-course-module-lessons {
    animation: none;
  }

  .ds-course-resume-action,
  .ds-course-track-tabs button,
  .ds-course-module-summary,
  .ds-module-chevron {
    transition: none;
  }

  .ds-course-resume-action:hover {
    transform: none;
  }

  .ds-access-status {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .ds-access-steps li.is-active > span,
  .ds-access-skeleton-content::after {
    animation: none;
  }
}

/* Full-width professional course workspace */
body.course-study-app {
  background: var(--ds-bg);
}

.ds-course-v2:not(.ds-access-state) {
  display: grid;
  grid-template-columns: 252px minmax(0, 1fr);
  width: 100%;
  max-width: none;
  min-height: calc(100svh - var(--nav-h, 68px));
  margin: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: var(--ds-paper);
  box-shadow: none;
}

.ds-course-v2:not(.ds-access-state).is-main-collapsed {
  grid-template-columns: 68px minmax(0, 1fr);
}

.ds-course-v2:not(.ds-access-state) > .ds-course-top {
  position: sticky;
  top: var(--nav-h, 68px);
  z-index: 6;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  align-self: start;
  height: calc(100svh - var(--nav-h, 68px));
  min-height: 560px;
  overflow: hidden;
  border: 0;
  border-right: 1px solid var(--ds-line);
  background: var(--ds-paper-soft);
}

.ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle {
  width: 36px;
  min-height: 36px;
  margin: 16px 16px 0 auto;
  border-color: var(--ds-line-strong);
  border-radius: 6px;
  background: var(--ds-paper);
}

.ds-course-v2:not(.ds-access-state) .ds-course-identity {
  width: 100%;
  padding: 24px 22px 22px;
  border-bottom: 1px solid var(--ds-line);
}

.ds-course-v2:not(.ds-access-state) .ds-course-identity img {
  width: 40px;
  height: 40px;
}

.ds-course-v2:not(.ds-access-state) .ds-course-identity strong {
  color: var(--ds-heading);
  font-size: 16px;
  font-weight: 800;
}

.ds-course-v2:not(.ds-access-state) .ds-course-identity small {
  margin-top: 4px;
  color: var(--ds-muted);
  font-size: 11px;
}

.ds-course-v2:not(.ds-access-state) .ds-surface-nav {
  align-content: start;
  gap: 2px;
  padding: 22px 12px;
}

.ds-course-v2:not(.ds-access-state) .ds-surface-nav button {
  min-height: 46px;
  border: 0;
  border-radius: 0;
  padding: 0 14px;
  background: transparent;
  color: var(--ds-muted-strong);
  font-size: 12px;
  font-weight: 720;
}

.ds-course-v2:not(.ds-access-state) .ds-surface-nav button:hover {
  background: var(--ds-soft);
  color: var(--ds-heading);
}

.ds-course-v2:not(.ds-access-state) .ds-surface-nav button.is-active {
  background: var(--ds-paper);
  color: var(--ds-accent-dark);
  box-shadow: inset 3px 0 0 var(--ds-gold);
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress {
  align-self: end;
  padding: 22px;
  border-top: 1px solid var(--ds-line);
  background: var(--ds-soft);
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress strong {
  color: var(--ds-heading);
  font-size: 26px;
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress progress,
.ds-course-overview-progress progress,
.ds-course-module .ds-module-state progress {
  height: 5px;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: var(--ds-soft);
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress progress::-webkit-progress-bar,
.ds-course-overview-progress progress::-webkit-progress-bar,
.ds-course-module .ds-module-state progress::-webkit-progress-bar {
  background: var(--ds-soft);
}

.ds-course-v2:not(.ds-access-state) .ds-top-progress progress::-webkit-progress-value,
.ds-course-overview-progress progress::-webkit-progress-value,
.ds-course-module .ds-module-state progress::-webkit-progress-value {
  background: var(--ds-gold);
}

.ds-course-v2:not(.ds-access-state) > .ds-home-shell,
.ds-course-v2:not(.ds-access-state) > .ds-study-layout,
.ds-course-v2:not(.ds-access-state) > .ds-practice-shell,
.ds-course-v2:not(.ds-access-state) > .ds-progress-shell {
  grid-column: 2;
  width: 100%;
  min-width: 0;
}

.ds-course-v2:not(.ds-access-state) > .ds-home-shell {
  padding: 0;
  background: var(--ds-paper);
}

.ds-course-v2[data-course-surface="progress"] .ds-progress-list,
.ds-course-v2[data-course-surface="progress"] .ds-progress-aside .ds-aside-block {
  overflow: hidden;
  border-right: 0;
  border-left: 0;
  border-radius: 0;
  background: var(--ds-paper);
  box-shadow: none;
}

.ds-course-v2[data-course-surface="progress"] .ds-progress-list > div {
  padding: 22px 18px;
}

.ds-course-v2[data-course-surface="progress"] .ds-progress-aside .ds-aside-block {
  padding: 18px 0;
}

.ds-course-overview-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 300px);
  gap: clamp(48px, 7vw, 120px);
  align-items: end;
  min-height: 390px;
  padding: 58px clamp(36px, 5vw, 84px) 48px;
  border: 0;
  background: var(--clr-primary-900);
  color: var(--ds-paper);
}

.ds-course-overview-identity {
  gap: 12px;
}

.ds-course-overview-identity .ds-home-icon {
  width: 48px;
  height: 48px;
  margin: 0;
  border: 1px solid color-mix(in srgb, var(--ds-paper) 18%, transparent);
  padding: 8px;
  background: var(--ds-paper);
  object-fit: contain;
}

.ds-course-overview-identity > span {
  color: var(--ds-gold);
  font-size: 10px;
  font-weight: 820;
}

.ds-course-overview-head .ds-home-copy h1 {
  max-width: 920px;
  margin: 26px 0 0;
  color: var(--ds-paper);
  font-family: var(--course-display-font);
  font-size: 56px;
  font-weight: 700;
  line-height: 1.02;
}

.ds-course-overview-head .ds-home-copy > p {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--clr-primary-100);
  font-size: 17px;
  line-height: 1.6;
}

.ds-course-overview-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 34px 0 0;
}

.ds-course-overview-facts div {
  min-width: 118px;
  border-left: 1px solid color-mix(in srgb, var(--ds-paper) 18%, transparent);
  padding: 0 28px;
}

.ds-course-overview-facts div:first-child {
  border-left: 0;
  padding-left: 0;
}

.ds-course-overview-facts dt {
  color: var(--ds-muted-soft);
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
}

.ds-course-overview-facts dd {
  margin: 7px 0 0;
  color: var(--ds-paper);
  font-size: 24px;
  font-weight: 760;
  line-height: 1;
}

.ds-course-overview-progress {
  display: grid;
  gap: 12px;
  border-top: 1px solid color-mix(in srgb, var(--ds-paper) 20%, transparent);
  border-left: 0;
  padding: 26px 0 0;
}

.ds-course-overview-progress > span {
  color: var(--ds-muted-soft);
  font-size: 9px;
}

.ds-course-overview-progress strong {
  color: var(--ds-paper);
  font-size: 34px;
  line-height: 1.05;
}

.ds-course-overview-progress small {
  color: var(--clr-primary-100);
  font-size: 11px;
}

.ds-course-overview-progress progress {
  width: 100%;
  background: color-mix(in srgb, var(--ds-paper) 16%, transparent);
}

.ds-course-overview-progress progress::-webkit-progress-bar {
  background: color-mix(in srgb, var(--ds-paper) 16%, transparent);
}

.ds-course-resume {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
  margin: 0;
  border: 0;
  border-bottom: 1px solid var(--ds-line);
  border-radius: 0;
  padding: 28px clamp(36px, 5vw, 84px);
  background: var(--ds-paper);
  color: var(--ds-heading);
}

.ds-course-resume::before {
  display: none;
}

.ds-course-resume-marker {
  display: grid;
  gap: 5px;
  border-right: 1px solid var(--ds-line);
  padding-right: 24px;
}

.ds-course-resume-marker span {
  color: var(--clr-gold-dark);
  font-size: 9px;
  font-weight: 830;
  text-transform: uppercase;
}

.ds-course-resume-marker strong {
  color: var(--ds-heading);
  font-size: 30px;
  font-weight: 720;
  line-height: 1;
}

.ds-course-resume-copy > p {
  margin: 0;
  color: var(--ds-muted);
  font-size: 10px;
  font-weight: 760;
  text-transform: uppercase;
}

.ds-course-resume-copy h2 {
  max-width: 820px;
  margin: 7px 0 0;
  color: var(--ds-heading);
  font-size: 22px;
  font-weight: 760;
  line-height: 1.2;
}

.ds-course-resume-meta {
  margin-top: 10px;
  color: var(--ds-muted);
}

.ds-course-resume-action {
  min-height: 46px;
  border-color: var(--clr-primary-900);
  border-radius: 6px;
  background: var(--clr-primary-900);
  color: var(--ds-paper);
}

.ds-course-resume-action:hover {
  background: var(--clr-primary-800);
}

.ds-course-v2[data-course-surface="overview"] .ds-section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  margin: 0;
  border: 0;
  padding: 54px clamp(36px, 5vw, 84px) 24px;
  background: var(--ds-paper);
}

.ds-course-v2[data-course-surface="overview"] .ds-section-head span {
  display: block;
  margin-bottom: 8px;
  color: var(--clr-gold-dark);
  font-size: 9px;
  font-weight: 830;
  text-transform: uppercase;
}

.ds-course-v2[data-course-surface="overview"] .ds-section-head h2 {
  margin: 0;
  color: var(--ds-heading);
  font-size: 30px;
  font-weight: 730;
  line-height: 1.1;
}

.ds-course-v2[data-course-surface="overview"] .ds-section-head p {
  max-width: 720px;
  margin-top: 10px;
  color: var(--ds-muted);
  font-size: 14px;
  line-height: 1.55;
}

.ds-course-v2[data-course-surface="overview"] .ds-section-head .ds-action {
  gap: 9px;
  width: auto;
  min-height: 42px;
  border-radius: 6px;
  background: var(--ds-paper);
}

.ds-course-v2[data-course-surface="overview"] .ds-section-head .ds-icon {
  width: 16px;
  height: 16px;
}

.ds-course-track-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0 clamp(36px, 5vw, 84px) 24px;
  border: 0;
  border-top: 1px solid var(--ds-line);
  border-bottom: 1px solid var(--ds-line);
  border-radius: 0;
  padding: 0;
  background: var(--ds-paper);
}

.ds-course-track-tabs button {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 64px;
  border: 0;
  border-right: 1px solid var(--ds-line);
  border-radius: 0;
  padding: 0 18px;
  background: transparent;
  color: var(--ds-muted);
}

.ds-course-track-tabs button:last-child {
  border-right: 0;
}

.ds-course-track-tabs button:hover {
  background: var(--ds-paper-soft);
  color: var(--ds-heading);
}

.ds-course-track-tabs button.is-active {
  background: var(--ds-paper-soft);
  color: var(--ds-heading);
  box-shadow: inset 0 -3px 0 var(--ds-gold);
}

.ds-course-track-tabs b {
  font-size: 13px;
}

.ds-course-track-tabs small {
  font-size: 9px;
}

.ds-course-path {
  display: grid;
  gap: 0;
  padding: 0 clamp(36px, 5vw, 84px) 72px;
  background: var(--ds-paper);
}

.ds-course-module {
  overflow: hidden;
  border: 0;
  border-top: 1px solid var(--ds-line);
  border-radius: 0;
  background: var(--ds-paper);
}

.ds-course-module:last-child {
  border-bottom: 1px solid var(--ds-line);
}

.ds-course-module.is-current {
  border-color: var(--clr-gold-light);
  background: var(--clr-gold-50);
  box-shadow: inset 4px 0 0 var(--ds-gold);
}

.ds-course-module.is-complete {
  border-color: var(--ds-line);
}

.ds-course-module-summary {
  display: grid;
  grid-template-columns: 76px minmax(260px, 1fr) 130px 170px 22px;
  gap: 24px;
  align-items: center;
  min-height: 112px;
  padding: 18px 22px;
  background: transparent;
}

.ds-course-module-summary:hover {
  background: var(--ds-paper-soft);
}

.ds-course-module[open] > .ds-course-module-summary {
  background: var(--ds-bg);
}

.ds-course-module .ds-module-index {
  display: grid;
  gap: 5px;
  align-content: center;
  justify-items: start;
  width: auto;
  height: 64px;
  border-right: 1px solid var(--ds-line);
}

.ds-course-module .ds-module-index small,
.ds-course-module .ds-module-copy em,
.ds-course-module .ds-module-meta small,
.ds-course-module .ds-module-state small {
  color: var(--ds-muted-soft);
  font-size: 8px;
  font-style: normal;
  font-weight: 820;
  letter-spacing: 0;
  text-transform: uppercase;
}

.ds-course-module .ds-module-index b {
  color: var(--ds-heading);
  font-size: 27px;
  font-weight: 690;
  line-height: 1;
}

.ds-course-module .ds-module-copy {
  display: grid;
  gap: 6px;
}

.ds-course-module .ds-module-copy strong {
  color: var(--ds-heading);
  font-size: 18px;
  font-weight: 760;
  line-height: 1.22;
}

.ds-course-module .ds-module-copy small {
  display: block;
  max-width: 720px;
  overflow: visible;
  color: var(--ds-muted);
  font-size: 12px;
  line-height: 1.45;
}

.ds-course-module .ds-module-meta,
.ds-course-module .ds-module-state {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.ds-course-module .ds-module-meta b,
.ds-course-module .ds-module-state b {
  color: var(--ds-heading);
  font-size: 12px;
  font-weight: 760;
}

.ds-course-module .ds-module-meta em,
.ds-course-module .ds-module-state em {
  color: var(--ds-muted-soft);
  font-size: 10px;
  font-style: normal;
  font-weight: 680;
}

.ds-course-module .ds-module-state progress {
  width: 100%;
  margin-top: 2px;
}

.ds-module-chevron {
  justify-self: end;
  color: var(--ds-muted);
}

.ds-course-module-lessons {
  display: grid;
  margin: 0;
  border-top: 1px solid var(--ds-line);
  padding: 0 22px 10px 122px;
  background: var(--ds-paper);
}

.ds-course-module-lessons li {
  border-bottom: 1px solid var(--ds-line-faint);
}

.ds-course-module-lessons li:last-child {
  border-bottom: 0;
}

.ds-course-module-lessons a {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 120px 18px;
  gap: 16px;
  align-items: center;
  min-height: 68px;
  padding: 8px 0;
}

.ds-course-lesson-index {
  width: 28px;
  height: 28px;
  border-color: var(--ds-line);
  border-radius: 5px;
  background: var(--ds-paper-soft);
}

.ds-course-lesson-copy {
  display: grid;
  gap: 4px;
}

.ds-course-lesson-copy small {
  order: 0;
  color: var(--ds-muted-soft);
  font-size: 8px;
  font-weight: 800;
  text-transform: uppercase;
}

.ds-course-lesson-copy strong {
  order: 1;
  color: var(--ds-heading);
  font-size: 13px;
  font-weight: 720;
  white-space: normal;
}

.ds-course-lesson-status {
  color: var(--ds-muted);
  font-size: 10px;
  font-weight: 720;
  text-align: right;
}

.ds-course-module-lessons li.is-current .ds-course-lesson-status,
.ds-course-module-lessons li.is-current .ds-course-lesson-copy strong {
  color: var(--ds-accent);
}

.ds-course-module-lessons li.is-complete .ds-course-lesson-status {
  color: var(--ds-accent-dark);
}

.ds-course-v2:not(.ds-access-state) > .ds-study-layout {
  grid-template-columns: minmax(250px, 290px) minmax(0, 1fr);
  padding: 0;
  background: var(--ds-paper);
}

.ds-course-v2:not(.ds-access-state) .ds-syllabus {
  position: sticky;
  top: var(--nav-h, 68px);
  align-self: start;
  height: calc(100svh - var(--nav-h, 68px));
  min-height: 560px;
  border: 0;
  border-right: 1px solid var(--ds-line);
  padding: 28px 22px;
  background: var(--ds-paper-soft);
}

.ds-course-v2:not(.ds-access-state) .ds-reader {
  width: min(100%, 960px);
  max-width: 960px;
  margin: 0 auto;
  padding: 56px clamp(34px, 5vw, 72px) 100px;
  background: var(--ds-paper);
}

.ds-course-v2:not(.ds-access-state) .ds-reader-head {
  margin: 0 0 32px;
  border: 0;
  border-bottom: 1px solid var(--ds-line);
  border-radius: 0;
  padding: 0 0 32px;
  background: transparent;
  box-shadow: none;
}

.ds-course-v2:not(.ds-access-state) .ds-reader-head h1 {
  max-width: 820px;
  font-size: 46px;
  line-height: 1.08;
}

.ds-course-v2:not(.ds-access-state) .ds-reader-actions {
  position: static;
  margin: 42px 0 0;
  border-top: 1px solid var(--ds-line);
  padding: 20px 0 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.ds-course-v2:not(.ds-access-state) > .ds-practice-shell,
.ds-course-v2:not(.ds-access-state) > .ds-progress-shell {
  min-height: calc(100svh - var(--nav-h, 68px));
  padding: 52px clamp(36px, 5vw, 84px) 72px;
  background: var(--ds-paper);
}

@media (max-width: 1120px) {
  .ds-course-v2:not(.ds-access-state),
  .ds-course-v2:not(.ds-access-state).is-main-collapsed {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-course-v2:not(.ds-access-state) > .ds-course-top {
    position: relative;
    top: auto;
    grid-template-columns: minmax(200px, 1fr) auto;
    grid-template-rows: auto auto;
    height: auto;
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--ds-line);
  }

  .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle {
    display: none;
  }

  .ds-course-v2:not(.ds-access-state) .ds-course-identity {
    grid-column: 1;
    grid-row: 1;
    border-bottom: 0;
    padding: 16px 22px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav {
    grid-column: 2;
    grid-row: 1;
    grid-template-columns: repeat(4, minmax(76px, 1fr));
    padding: 10px 14px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav button {
    justify-content: center;
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress {
    grid-column: 1 / -1;
    grid-row: 2;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    padding: 10px 22px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress strong {
    grid-row: auto;
    font-size: 17px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress progress {
    grid-column: 2;
    grid-row: 1;
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress small {
    grid-column: 3;
    grid-row: 1;
  }

  .ds-course-v2:not(.ds-access-state) > .ds-home-shell,
  .ds-course-v2:not(.ds-access-state) > .ds-study-layout,
  .ds-course-v2:not(.ds-access-state) > .ds-practice-shell,
  .ds-course-v2:not(.ds-access-state) > .ds-progress-shell {
    grid-column: 1;
  }

  .ds-course-overview-head {
    min-height: 360px;
    padding-right: 42px;
    padding-left: 42px;
  }

  .ds-course-resume,
  .ds-course-v2[data-course-surface="overview"] .ds-section-head {
    padding-right: 42px;
    padding-left: 42px;
  }

  .ds-course-track-tabs {
    margin-right: 42px;
    margin-left: 42px;
  }

  .ds-course-path {
    padding-right: 42px;
    padding-left: 42px;
  }

  .ds-course-module-summary {
    grid-template-columns: 68px minmax(220px, 1fr) 120px 140px 20px;
    gap: 18px;
  }

  .ds-course-v2:not(.ds-access-state) > .ds-study-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-course-v2:not(.ds-access-state) .ds-syllabus {
    position: static;
    height: auto;
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--ds-line);
  }
}

@media (max-width: 760px) {
  .ds-course-overview-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
    min-height: 0;
  }

  .ds-course-overview-progress {
    max-width: none;
  }

  .ds-course-resume {
    grid-template-columns: 72px minmax(0, 1fr);
  }

  .ds-course-resume-action {
    grid-column: 1 / -1;
    width: 100%;
  }

  .ds-course-module-summary {
    grid-template-columns: 62px minmax(0, 1fr) 130px 20px;
  }

  .ds-course-module .ds-module-meta {
    display: none;
  }

  .ds-course-module-lessons {
    padding-left: 102px;
  }
}

@media (max-width: 680px) {
  .ds-course-v2:not(.ds-access-state) {
    min-height: calc(100svh - var(--nav-h, 68px));
  }

  .ds-course-v2:not(.ds-access-state) > .ds-course-top {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto;
  }

  .ds-course-v2:not(.ds-access-state) .ds-course-identity {
    grid-column: 1;
    grid-row: 1;
    padding: 14px 16px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-course-identity img {
    width: 34px;
    height: 34px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav {
    grid-column: 1;
    grid-row: 2;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--ds-line);
    padding: 5px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav button {
    display: grid;
    justify-items: center;
    gap: 3px;
    min-height: 50px;
    padding: 5px 2px;
    font-size: 9px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-surface-nav button.is-active {
    box-shadow: inset 0 -3px 0 var(--ds-gold);
  }

  .ds-course-v2:not(.ds-access-state) .ds-top-progress {
    display: none;
  }

  .ds-course-overview-head {
    gap: 28px;
    padding: 34px 18px 30px;
  }

  .ds-course-overview-identity .ds-home-icon {
    width: 42px;
    height: 42px;
  }

  .ds-course-overview-head .ds-home-copy h1 {
    margin-top: 22px;
    font-size: 38px;
  }

  .ds-course-overview-head .ds-home-copy > p {
    font-size: 15px;
  }

  .ds-course-overview-facts {
    margin-top: 26px;
  }

  .ds-course-overview-facts div {
    min-width: 0;
    flex: 1 1 33%;
    padding: 0 14px;
  }

  .ds-course-overview-facts dd {
    font-size: 21px;
  }

  .ds-course-overview-progress strong {
    font-size: 30px;
  }

  .ds-course-resume {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 16px;
    padding: 24px 18px;
  }

  .ds-course-resume-marker {
    padding-right: 14px;
  }

  .ds-course-resume-marker strong {
    font-size: 24px;
  }

  .ds-course-resume-copy h2 {
    font-size: 20px;
  }

  .ds-course-v2[data-course-surface="overview"] .ds-section-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    padding: 40px 18px 22px;
  }

  .ds-course-v2[data-course-surface="overview"] .ds-section-head h2 {
    font-size: 27px;
  }

  .ds-course-track-tabs {
    margin: 0 18px 18px;
  }

  .ds-course-track-tabs button {
    display: flex;
    min-height: 60px;
    flex-direction: column;
    gap: 4px;
    justify-content: center;
    padding: 7px 4px;
    text-align: center;
  }

  .ds-course-track-tabs small {
    display: none;
  }

  .ds-course-track-tabs b {
    width: 100%;
    font-size: 10px;
    text-overflow: clip;
  }

  .ds-course-path {
    padding: 0 18px 48px;
  }

  .ds-course-module-summary {
    grid-template-columns: 52px minmax(0, 1fr) 20px;
    gap: 14px;
    min-height: 100px;
    padding: 14px 10px;
  }

  .ds-course-module .ds-module-index {
    height: 58px;
  }

  .ds-course-module .ds-module-index b {
    font-size: 23px;
  }

  .ds-course-module .ds-module-copy strong {
    font-size: 16px;
  }

  .ds-course-module .ds-module-copy small {
    display: none;
  }

  .ds-course-module[open] .ds-module-copy small {
    display: block;
    margin-top: 2px;
  }

  .ds-course-module .ds-module-state,
  .ds-course-module .ds-module-meta {
    display: none;
  }

  .ds-course-module-lessons {
    padding: 0 10px 8px;
  }

  .ds-course-module-lessons a {
    grid-template-columns: 30px minmax(0, 1fr) 18px;
    gap: 11px;
    min-height: 68px;
  }

  .ds-course-lesson-status {
    grid-column: 2;
    grid-row: 2;
    text-align: left;
  }

  .ds-course-lesson-arrow {
    grid-column: 3;
    grid-row: 1 / 3;
  }

  .ds-course-v2:not(.ds-access-state) .ds-syllabus {
    padding: 20px 16px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-reader {
    padding: 34px 18px 64px;
  }

  .ds-course-v2:not(.ds-access-state) .ds-reader-head h1 {
    font-size: 36px;
  }

  .ds-course-v2:not(.ds-access-state) > .ds-practice-shell,
  .ds-course-v2:not(.ds-access-state) > .ds-progress-shell {
    padding: 34px 18px 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ds-course-module-summary,
  .ds-course-track-tabs button,
  .ds-course-resume-action {
    transition: none;
  }
}

/* Full-width editorial lesson reader */
.ds-reader-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  background: var(--ds-paper);
}

.ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head {
  position: relative;
  margin: 0;
  padding: 42px clamp(34px, 5vw, 76px) 34px;
  overflow: hidden;
  border: 0;
  border-bottom: 4px solid var(--ds-gold);
  border-radius: 0;
  background: var(--ds-heading);
  box-shadow: none;
  color: var(--ds-paper);
}

.ds-reader-head::after {
  content: "";
  position: absolute;
  top: 0;
  right: clamp(34px, 5vw, 76px);
  width: 1px;
  height: 100%;
  background: color-mix(in srgb, var(--ds-paper) 12%, transparent);
  pointer-events: none;
}

.ds-reader-context,
.ds-reader-head-footer,
.ds-reader-title-layout {
  position: relative;
  z-index: 1;
}

.ds-reader-context {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 34px;
  color: color-mix(in srgb, var(--ds-paper) 64%, transparent);
  font-family: var(--course-ui-font);
  font-size: 11px;
  font-weight: 720;
  line-height: 1.35;
  text-transform: uppercase;
}

.ds-reader-context > div {
  display: flex;
  min-width: 0;
  gap: 10px;
  align-items: center;
}

.ds-reader-context strong {
  min-width: 0;
  overflow: hidden;
  color: var(--ds-paper);
  font-weight: 720;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ds-reader-course-link {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ds-gold);
  font: inherit;
  font-weight: 780;
  text-transform: uppercase;
  cursor: pointer;
}

.ds-reader-course-link:hover {
  color: var(--ds-paper);
}

.ds-reader-position-label {
  flex: 0 0 auto;
  color: color-mix(in srgb, var(--ds-paper) 72%, transparent);
}

.ds-reader-title-layout {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.ds-reader-lesson-number {
  display: block;
  padding-top: 7px;
  border-top: 3px solid var(--ds-gold);
  color: var(--ds-gold);
  font-family: var(--course-display-font);
  font-size: 28px;
  font-weight: 680;
  line-height: 1;
}

.ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head h1 {
  max-width: 920px;
  margin: 0;
  color: var(--ds-paper);
  font-size: 50px;
  font-weight: 650;
  line-height: 1.06;
}

.ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head p {
  max-width: 760px;
  margin: 18px 0 0;
  color: color-mix(in srgb, var(--ds-paper) 74%, transparent);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.62;
}

.ds-reader-head-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(190px, 260px);
  gap: 28px;
  align-items: end;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid color-mix(in srgb, var(--ds-paper) 14%, transparent);
}

.ds-reader-meta {
  gap: 8px;
  margin: 0;
}

.ds-reader-meta span,
.ds-reader-meta .ds-focus-toggle {
  display: inline-flex;
  min-height: 36px;
  gap: 8px;
  align-items: center;
  padding: 8px 11px;
  border: 1px solid color-mix(in srgb, var(--ds-paper) 18%, transparent);
  border-radius: 6px;
  background: color-mix(in srgb, var(--ds-paper) 7%, transparent);
  color: color-mix(in srgb, var(--ds-paper) 82%, transparent);
  font-family: var(--course-ui-font);
  font-size: 11px;
  font-weight: 720;
  line-height: 1;
}

.ds-reader-meta .ds-reader-status.is-complete {
  border-color: color-mix(in srgb, var(--ds-gold) 42%, transparent);
  color: var(--ds-gold);
}

.ds-reader-meta .ds-focus-toggle {
  cursor: pointer;
}

.ds-reader-meta .ds-focus-toggle:hover,
.ds-reader-meta .ds-focus-toggle[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--ds-gold) 48%, transparent);
  background: color-mix(in srgb, var(--ds-gold) 12%, transparent);
  color: var(--ds-paper);
}

.ds-reader-meta .ds-icon {
  width: 15px;
  height: 15px;
  flex: 0 0 15px;
}

.ds-reader-position {
  display: grid;
  gap: 8px;
}

.ds-reader-position span {
  color: color-mix(in srgb, var(--ds-paper) 62%, transparent);
  font-family: var(--course-ui-font);
  font-size: 10px;
  font-weight: 720;
  line-height: 1.2;
  text-align: right;
  text-transform: uppercase;
}

.ds-reader-position progress {
  width: 100%;
  height: 4px;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: color-mix(in srgb, var(--ds-paper) 15%, transparent);
  appearance: none;
}

.ds-reader-position progress::-webkit-progress-bar {
  background: color-mix(in srgb, var(--ds-paper) 15%, transparent);
}

.ds-reader-position progress::-webkit-progress-value {
  background: var(--ds-gold);
}

.ds-reader-position progress::-moz-progress-bar {
  background: var(--ds-gold);
}

.ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-paper {
  width: min(calc(100% - 72px), 1080px);
  margin: 0 auto;
  padding: 54px 0 0;
}

.ds-reader-section {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 28px;
  margin: 0;
  padding: 38px 0;
  border: 0;
  border-top: 1px solid var(--ds-line);
}

.ds-reader-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.ds-reader-section-rail span,
.ds-doc-section-rail span {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ds-line-strong);
  border-radius: 50%;
  color: var(--ds-accent-dark);
  font-family: var(--course-ui-font);
  font-size: 11px;
  font-weight: 780;
  line-height: 1;
}

.ds-reader-section-copy {
  min-width: 0;
}

.ds-reader-section-copy h2 {
  margin: 0 0 14px;
  color: var(--ds-heading);
  font-family: var(--course-display-font);
  font-size: 29px;
  font-weight: 680;
  line-height: 1.18;
}

.ds-reader-section-copy > p {
  max-width: 72ch;
  margin: 0;
  color: var(--ds-reading);
  font-family: var(--course-reading-font);
  font-size: 18px;
  line-height: 1.76;
}

.ds-reader-section-objective .ds-reader-section-copy > p {
  max-width: 66ch;
  color: var(--ds-heading);
  font-size: 22px;
  font-weight: 540;
  line-height: 1.58;
}

.ds-reader-section-example,
.ds-reader-section-practice,
.ds-reader-section-mistakes,
.ds-reader-section-summary {
  padding-right: 24px;
  padding-left: 24px;
  background: var(--ds-paper-soft);
}

.ds-reader-section-example {
  border-left: 4px solid var(--ds-accent);
}

.ds-reader-section-practice {
  border-left: 4px solid var(--ds-gold);
}

.ds-reader-section-mistakes {
  border-left: 4px solid var(--ds-line-strong);
}

.ds-reader-section-summary {
  border-left: 4px solid var(--ds-accent-dark);
}

.ds-reader-section .ds-rich-stack {
  gap: 28px;
  margin-top: 34px;
  padding: 30px 0 0;
  border-top: 1px solid var(--ds-line);
  border-bottom: 0;
}

.ds-reader-section .ds-rich-panel {
  gap: 16px;
  padding: 0;
  box-shadow: none;
}

.ds-reader-section .ds-rich-panel > h3 {
  width: auto;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ds-line);
  color: var(--ds-heading);
  font-family: var(--course-ui-font);
  font-size: 13px;
  font-weight: 780;
  text-decoration: none;
}

.ds-reader-section .ds-mini-card,
.ds-reader-section .ds-rich-callout,
.ds-reader-section .ds-quality-grid article,
.ds-reader-section .ds-dossier-list article {
  box-shadow: none;
}

.ds-reader-section .ds-checklist,
.ds-reader-section .ds-error-list {
  margin-top: 4px;
}

.ds-reader-section .ds-checklist li {
  position: relative;
  padding: 13px 14px 13px 40px;
  border: 1px solid var(--ds-line);
  border-radius: 6px;
  background: var(--ds-paper);
  color: var(--ds-text-body);
}

.ds-reader-section .ds-checklist li::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 16px;
  width: 8px;
  height: 4px;
  border-bottom: 2px solid var(--ds-accent-dark);
  border-left: 2px solid var(--ds-accent-dark);
  transform: rotate(-45deg);
}

.ds-reader-section .ds-error-list {
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
}

.ds-reader-section .ds-error-list li {
  position: relative;
  padding-left: 24px;
  color: var(--ds-text-body);
  font-size: 15px;
  line-height: 1.58;
}

.ds-reader-section .ds-error-list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 10px;
  height: 2px;
  background: var(--ds-muted-strong);
}

.ds-document-paper {
  display: block;
}

.ds-doc-flow {
  display: grid;
  gap: 0;
}

.ds-doc-preface {
  display: grid;
  gap: 18px;
  padding: 0 0 42px;
}

.ds-doc-section {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 28px;
  padding: 44px 0;
  border-top: 1px solid var(--ds-line);
}

.ds-doc-section-copy {
  display: grid;
  min-width: 0;
  gap: 20px;
}

.ds-doc-section.is-opening-section .ds-doc-section-copy > .ds-doc-paragraph:first-of-type p:first-child {
  max-width: 66ch;
  color: var(--ds-heading);
  font-size: 22px;
  font-weight: 540;
  line-height: 1.58;
}

.ds-doc-heading {
  width: auto;
  color: var(--ds-heading);
  text-decoration: none;
}

.ds-doc-heading-2 {
  display: block;
  margin: 0 0 4px;
  padding: 0;
  border: 0;
  font-size: 30px;
  font-weight: 680;
  line-height: 1.18;
}

.ds-doc-heading-2::before,
.ds-doc-heading-2::after {
  display: none;
}

.ds-doc-heading-3 {
  margin: 14px 0 0;
  padding: 2px 0 2px 14px;
  border-left: 3px solid var(--ds-gold);
  color: var(--ds-heading);
  font-size: 20px;
  font-weight: 680;
  line-height: 1.3;
}

.ds-doc-heading-4 {
  margin: 8px 0 0;
  color: var(--ds-accent-dark);
  font-size: 13px;
  font-weight: 780;
  text-transform: uppercase;
}

.ds-doc-paragraph p,
.ds-doc-list {
  max-width: 74ch;
  color: var(--ds-reading);
  font-family: var(--course-reading-font);
  font-size: 18px;
  line-height: 1.76;
}

.ds-doc-paragraph p + p {
  margin-top: 14px;
}

.ds-doc-list {
  gap: 12px;
  margin: 0;
  padding-left: 24px;
}

.ds-doc-meta-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--ds-line);
  border-radius: 0;
  background: var(--ds-paper);
  box-shadow: none;
}

.ds-doc-meta-grid p {
  min-height: 64px;
  margin: 0;
  padding: 15px 18px;
  border: 0;
  border-bottom: 1px solid var(--ds-line);
  background: var(--ds-paper-soft);
  color: var(--ds-text-body);
  font-size: 13px;
  line-height: 1.5;
}

.ds-doc-meta-grid p:nth-child(odd) {
  border-right: 1px solid var(--ds-line);
}

.ds-doc-note {
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 18px;
  padding: 22px 24px;
  border: 0;
  border-top: 1px solid var(--ds-line-strong);
  border-bottom: 1px solid var(--ds-line-strong);
  border-left: 4px solid var(--ds-accent);
  border-radius: 0;
  background: var(--ds-paper-soft);
  box-shadow: none;
}

.ds-doc-note-icon {
  border-radius: 50%;
  background: var(--ds-paper);
}

.ds-doc-note h3 {
  color: var(--ds-heading);
  font-size: 12px;
  font-weight: 780;
}

.ds-doc-note p {
  max-width: 72ch;
  color: var(--ds-text-body);
  font-family: var(--course-reading-font);
  font-size: 16px;
  line-height: 1.68;
}

.ds-doc-table-wrap {
  border: 1px solid var(--ds-line-strong);
  border-radius: 0;
  box-shadow: none;
}

.ds-doc-table th,
.ds-doc-table td {
  padding: 15px 16px;
  border-color: var(--ds-line);
}

.ds-doc-table tr.is-header th {
  background: var(--ds-heading);
}

.ds-doc-table th p {
  color: var(--ds-paper);
  font-size: 11px;
  font-weight: 780;
}

.ds-doc-table td p {
  color: var(--ds-table-text);
  font-size: 14px;
  line-height: 1.58;
}

.ds-source-row {
  margin-top: 6px;
  padding: 24px 0 0 86px;
  border-top: 1px solid var(--ds-line);
}

.ds-source-row span {
  margin-right: 6px;
}

.ds-source-row a {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding: 5px 10px;
  border: 1px solid var(--ds-line);
  border-radius: 5px;
  background: var(--ds-paper-soft);
  text-decoration: none;
}

.ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-actions {
  position: static;
  display: grid;
  width: min(calc(100% - 72px), 1080px);
  grid-template-columns: minmax(0, 1fr) minmax(190px, auto) minmax(0, 1fr);
  gap: 14px;
  align-items: stretch;
  margin: 54px auto 0;
  padding: 28px 0 72px;
  border-top: 1px solid var(--ds-line-strong);
  background: transparent;
}

.ds-reader-nav-link,
.ds-reader-complete {
  display: flex;
  min-width: 0;
  min-height: 64px;
  align-items: center;
  border: 1px solid var(--ds-line);
  border-radius: 7px;
  background: var(--ds-paper);
  color: var(--ds-heading);
  font-family: var(--course-ui-font);
  text-decoration: none;
  cursor: pointer;
}

.ds-reader-nav-link {
  gap: 12px;
  padding: 12px 14px;
  text-align: left;
}

.ds-reader-nav-next {
  justify-content: flex-end;
  text-align: right;
}

.ds-reader-nav-link > span:not(.ds-reader-nav-icon) {
  display: grid;
  min-width: 0;
  gap: 4px;
}

.ds-reader-nav-link small {
  color: var(--ds-text-meta);
  font-size: 10px;
  font-weight: 760;
  text-transform: uppercase;
}

.ds-reader-nav-link strong {
  overflow: hidden;
  color: var(--ds-heading);
  font-size: 12px;
  font-weight: 720;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ds-reader-nav-icon {
  display: inline-flex;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ds-line);
  border-radius: 50%;
  color: var(--ds-accent-dark);
}

.ds-reader-nav-icon .ds-icon {
  width: 16px;
  height: 16px;
}

.ds-reader-complete {
  justify-content: center;
  gap: 9px;
  padding: 12px 18px;
  border-color: var(--ds-heading);
  background: var(--ds-heading);
  color: var(--ds-paper);
  font-size: 12px;
  font-weight: 760;
  line-height: 1.25;
  text-align: center;
}

.ds-reader-complete .ds-icon {
  width: 16px;
  height: 16px;
}

.ds-reader-nav-link:hover {
  border-color: var(--ds-accent);
  background: var(--ds-paper-soft);
}

.ds-reader-complete:hover {
  border-color: var(--ds-accent);
  background: var(--ds-accent-dark);
}

.ds-reader-course-link:focus-visible,
.ds-reader-nav-link:focus-visible,
.ds-reader-complete:focus-visible,
.ds-reader-meta .ds-focus-toggle:focus-visible {
  outline: 3px solid var(--ds-gold);
  outline-offset: 3px;
}

@media (max-width: 1120px) {
  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head {
    padding: 38px 30px 32px;
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head h1 {
    font-size: 43px;
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-paper,
  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-actions {
    width: min(calc(100% - 60px), 1080px);
  }
}

@media (max-width: 760px) {
  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head {
    padding: 30px 18px 28px;
  }

  .ds-reader-head::after {
    display: none;
  }

  .ds-reader-context {
    display: grid;
    gap: 8px;
    margin-bottom: 26px;
  }

  .ds-reader-position-label {
    justify-self: start;
  }

  .ds-reader-title-layout {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 16px;
  }

  .ds-reader-lesson-number {
    font-size: 21px;
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head h1 {
    font-size: 35px;
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head p {
    margin-top: 14px;
    font-size: 15px;
  }

  .ds-reader-head-footer {
    grid-template-columns: minmax(0, 1fr);
    margin-top: 26px;
    padding-top: 20px;
  }

  .ds-reader-position span {
    text-align: left;
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-paper,
  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-actions {
    width: calc(100% - 36px);
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-paper {
    padding-top: 38px;
  }

  .ds-reader-section,
  .ds-doc-section {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 16px;
    padding: 32px 0;
  }

  .ds-reader-section-rail span,
  .ds-doc-section-rail span {
    width: 34px;
    height: 34px;
    font-size: 10px;
  }

  .ds-reader-section-copy h2,
  .ds-doc-heading-2 {
    font-size: 24px;
  }

  .ds-reader-section-copy > p,
  .ds-doc-paragraph p,
  .ds-doc-list {
    font-size: 16px;
    line-height: 1.68;
  }

  .ds-reader-section-objective .ds-reader-section-copy > p,
  .ds-doc-section.is-opening-section .ds-doc-section-copy > .ds-doc-paragraph:first-of-type p:first-child {
    font-size: 19px;
  }

  .ds-reader-section-example,
  .ds-reader-section-practice,
  .ds-reader-section-mistakes,
  .ds-reader-section-summary {
    padding-right: 14px;
    padding-left: 12px;
  }

  .ds-reader-section .ds-checklist,
  .ds-doc-meta-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-doc-meta-grid p:nth-child(odd) {
    border-right: 0;
  }

  .ds-doc-note {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
    padding: 18px 14px;
  }

  .ds-source-row {
    padding-left: 56px;
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-actions {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .ds-reader-complete {
    grid-column: 1 / -1;
    grid-row: 1;
  }
}

@media (max-width: 520px) {
  .ds-reader-title-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .ds-reader-lesson-number {
    width: 42px;
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-head h1 {
    font-size: 32px;
  }

  .ds-reader-meta span,
  .ds-reader-meta .ds-focus-toggle {
    width: 100%;
    justify-content: flex-start;
  }

  .ds-reader-section,
  .ds-doc-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .ds-reader-section-rail span,
  .ds-doc-section-rail span {
    width: 32px;
    height: 32px;
  }

  .ds-reader-section-example,
  .ds-reader-section-practice,
  .ds-reader-section-mistakes,
  .ds-reader-section-summary {
    padding: 26px 14px;
  }

  .ds-source-row {
    padding-left: 0;
  }

  .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] .ds-reader-actions {
    grid-template-columns: minmax(0, 1fr);
    margin-top: 42px;
    padding-bottom: 52px;
  }

  .ds-reader-complete,
  .ds-reader-nav-previous,
  .ds-reader-nav-next {
    grid-column: 1;
  }

  .ds-reader-complete {
    grid-row: 1;
  }

  .ds-reader-nav-previous {
    grid-row: 2;
  }

  .ds-reader-nav-next {
    grid-row: 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ds-reader-nav-link,
  .ds-reader-complete,
  .ds-reader-course-link,
  .ds-reader-meta .ds-focus-toggle {
    transition: none;
  }
}

/* Horizontal syllabus drawer: no permanent secondary rail. */
body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-study-layout,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-syllabus-collapsed > .ds-study-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  background: var(--ds-paper);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus {
  position: sticky;
  z-index: 23;
  top: calc(var(--nav-h, 68px) + 76px);
  display: grid;
  width: 100%;
  height: 58px;
  min-height: 58px;
  grid-template-columns: minmax(0, 1fr) auto;
  order: 0;
  align-items: center;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--ds-line);
  background: color-mix(in srgb, var(--ds-paper) 96%, transparent);
  box-shadow: none;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.ds-syllabus-bar {
  display: flex;
  min-width: 0;
  gap: 12px;
  align-items: baseline;
  padding-left: 28px;
  color: var(--ds-heading);
  font-family: var(--course-ui-font);
}

.ds-syllabus-bar strong {
  font-size: 13px;
  font-weight: 760;
}

.ds-syllabus-bar span {
  color: var(--ds-text-meta);
  font-size: 10px;
  font-weight: 720;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-toggle,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-syllabus-collapsed .ds-syllabus-toggle {
  display: inline-flex;
  width: auto;
  min-width: 0;
  grid-column: 2;
  grid-row: 1;
  gap: 7px;
  justify-self: end;
  margin-right: 28px;
  padding: 0 12px;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-toggle .ds-toggle-label,
body.course-study-app .ds-course-v2:not(.ds-access-state).is-syllabus-collapsed .ds-syllabus-toggle .ds-toggle-label {
  display: inline;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-inner {
  position: absolute;
  top: 58px;
  right: 0;
  left: 0;
  display: block;
  max-height: min(58svh, 520px);
  grid-column: 1 / -1;
  grid-row: 2;
  padding: 18px 28px 24px;
  overflow: hidden;
  border-bottom: 1px solid var(--ds-line-strong);
  background: var(--ds-paper);
  box-shadow: none;
}

body.course-study-app .ds-course-v2:not(.ds-access-state).is-syllabus-collapsed .ds-syllabus-inner {
  display: none;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-scroll {
  display: grid;
  max-height: min(50svh, 450px);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 28px;
  padding-right: 8px;
  overflow-y: auto;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus .ds-unit {
  min-width: 0;
  padding: 12px 0;
  break-inside: avoid;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-reader {
  width: 100%;
  max-width: none;
  grid-column: 1;
  order: 1;
}

@media (max-width: 980px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-scroll {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus {
    top: var(--nav-h, 68px);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .ds-syllabus-bar {
    padding-left: 16px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-toggle,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-syllabus-collapsed .ds-syllabus-toggle {
    margin-right: 16px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-inner {
    max-height: min(64svh, 520px);
    padding: 10px 16px 18px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-scroll {
    max-height: min(58svh, 460px);
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }
}

/* Access validation uses the final course geometry to prevent a card-shaped flash. */
body.course-study-app .ds-course-v2.ds-access-state {
  display: grid;
  width: 100%;
  max-width: none;
  min-height: calc(100svh - var(--nav-h, 68px));
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: 76px minmax(0, 1fr);
  place-items: stretch;
  margin: 0;
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: var(--ds-paper);
  box-shadow: none;
  text-align: left;
}

body.course-study-app .ds-access-shell .ds-access-course-rail {
  position: sticky;
  z-index: 24;
  top: var(--nav-h, 68px);
  display: grid;
  width: 100%;
  height: 76px;
  min-height: 76px;
  grid-column: 1;
  grid-row: 1;
  grid-template-columns: minmax(220px, 280px) minmax(420px, 1fr) minmax(170px, 220px);
  grid-template-rows: 76px;
  align-items: stretch;
  border: 0;
  border-bottom: 1px solid var(--ds-line);
  background: color-mix(in srgb, var(--ds-paper) 94%, transparent);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--ds-ink) 5%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

body.course-study-app .ds-access-course-identity {
  display: grid;
  min-width: 0;
  grid-column: 1;
  grid-row: 1;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 10px 24px;
  border: 0;
  border-right: 1px solid var(--ds-line);
}

body.course-study-app .ds-access-course-identity strong {
  overflow: hidden;
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.course-study-app .ds-access-course-identity small {
  margin-top: 2px;
  font-size: 10px;
}

body.course-study-app .ds-access-course-nav {
  display: grid;
  min-width: 0;
  grid-column: 2;
  grid-row: 1;
  grid-template-columns: repeat(4, minmax(88px, 1fr));
  gap: 2px;
  align-content: stretch;
  padding: 8px 12px;
  border-right: 1px solid var(--ds-line);
}

body.course-study-app .ds-access-course-nav > span {
  display: flex;
  min-width: 0;
  min-height: 44px;
  grid-template-columns: none;
  gap: 8px;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  border: 0;
  border-radius: 0;
  background: transparent;
}

body.course-study-app .ds-access-course-nav > span.is-current {
  border: 0;
  background: transparent;
  box-shadow: inset 0 -3px 0 var(--ds-gold);
}

body.course-study-app .ds-access-course-nav b {
  min-width: 0;
  overflow: hidden;
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.course-study-app .ds-access-course-progress {
  display: grid;
  grid-column: 3;
  grid-row: 1;
  gap: 8px;
  align-content: center;
  align-self: stretch;
  padding: 12px 22px;
  border: 0;
}

body.course-study-app .ds-access-shell-main,
body.course-study-app .ds-access-locked-main {
  width: 100%;
  max-width: none;
  min-width: 0;
  grid-column: 1;
  grid-row: 2;
  margin: 0;
}

body.course-study-app .ds-access-shell-main {
  padding: 34px clamp(28px, 5vw, 72px) 54px;
}

@media (max-width: 980px) {
  body.course-study-app .ds-access-shell .ds-access-course-rail {
    grid-template-columns: minmax(210px, 250px) minmax(0, 1fr);
  }

  body.course-study-app .ds-access-course-nav {
    grid-column: 2;
    border-right: 0;
  }

  body.course-study-app .ds-access-course-progress {
    display: none;
  }
}

@media (max-width: 680px) {
  body.course-study-app .ds-course-v2.ds-access-state {
    min-height: calc(100svh - var(--nav-h, 68px));
    grid-template-rows: 120px minmax(0, 1fr);
  }

  body.course-study-app .ds-access-shell .ds-access-course-rail {
    position: relative;
    top: auto;
    height: 120px;
    min-height: 120px;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 62px 58px;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  body.course-study-app .ds-access-course-identity {
    grid-column: 1;
    grid-row: 1;
    padding: 8px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--ds-line);
  }

  body.course-study-app .ds-access-course-identity img {
    width: 34px;
    height: 34px;
  }

  body.course-study-app .ds-access-course-nav {
    display: grid;
    grid-column: 1;
    grid-row: 2;
    gap: 0;
    padding: 0 4px;
    border: 0;
  }

  body.course-study-app .ds-access-course-nav > span {
    min-width: 0;
    min-height: 58px;
    flex-direction: column;
    gap: 4px;
    padding: 4px 2px;
  }

  body.course-study-app .ds-access-course-nav b {
    width: 100%;
    font-size: 9px;
    text-align: center;
  }

  body.course-study-app .ds-access-shell-main {
    padding: 24px 18px 40px;
  }
}

/* Desktop course navigation: integrated vertical rail, never a floating card. */
@media (min-width: 761px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state) {
    grid-template-columns: 286px minmax(0, 1fr);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed {
    grid-template-columns: 76px minmax(0, 1fr);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-course-top {
    position: sticky;
    z-index: 22;
    top: var(--nav-h, 68px);
    display: grid;
    width: auto;
    height: calc(100svh - var(--nav-h, 68px));
    min-height: 560px;
    grid-column: 1;
    grid-row: 1;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    align-self: start;
    align-items: start;
    overflow: hidden;
    border: 0;
    border-right: 1px solid var(--ds-line);
    background: var(--ds-paper-hover);
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle {
    position: absolute;
    z-index: 3;
    top: 20px;
    right: 18px;
    display: inline-flex;
    width: 36px;
    min-width: 36px;
    min-height: 36px;
    margin: 0;
    padding: 0;
    border: 1px solid color-mix(in srgb, var(--ds-paper) 22%, transparent);
    border-radius: 6px;
    background: color-mix(in srgb, var(--ds-paper) 9%, transparent);
    color: var(--ds-paper);
    box-shadow: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle:hover,
  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle:focus-visible {
    border-color: color-mix(in srgb, var(--ds-paper) 48%, transparent);
    background: color-mix(in srgb, var(--ds-paper) 16%, transparent);
    color: var(--ds-paper);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle .ds-toggle-label {
    display: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity {
    display: grid;
    width: 100%;
    min-width: 0;
    grid-column: 1;
    grid-row: 1;
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    justify-content: start;
    min-height: 92px;
    padding: 20px 62px 20px 22px;
    border: 0;
    border-right: 0;
    border-bottom: 3px solid var(--ds-gold);
    background: var(--clr-primary-900);
    text-align: left;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity:hover {
    background: var(--clr-primary-800);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity img {
    width: 40px;
    height: 40px;
    padding: 5px;
    border-radius: 8px;
    background: var(--ds-paper);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity-copy,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity-copy {
    display: grid;
    min-width: 0;
    gap: 3px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity-copy strong {
    color: var(--ds-paper);
    font-size: 16px;
    line-height: 1.15;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity-copy small {
    color: color-mix(in srgb, var(--ds-paper) 62%, transparent);
    font-size: 10px;
    line-height: 1.35;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav {
    display: grid;
    min-width: 0;
    grid-column: 1;
    grid-row: 2;
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    align-content: start;
    align-items: start;
    padding: 14px 12px 16px;
    border: 0;
    border-bottom: 1px solid var(--ds-line);
    background: transparent;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav button {
    width: 100%;
    min-width: 0;
    min-height: 42px;
    justify-content: flex-start;
    gap: 11px;
    padding: 0 12px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    box-shadow: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button:hover {
    background: var(--ds-soft);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button.is-active {
    background: var(--ds-paper);
    color: var(--ds-accent-dark);
    box-shadow: inset 3px 0 0 var(--ds-accent), 0 5px 16px color-mix(in srgb, var(--clr-primary-900) 7%, transparent);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-nav-label,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-nav-label {
    display: inline;
    min-width: 0;
    overflow: hidden;
    font-size: 12px;
    text-align: left;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-top-progress {
    display: grid;
    grid-column: 1;
    grid-row: 4;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 8px 10px;
    align-content: center;
    align-self: end;
    padding: 18px 22px 22px;
    border: 0;
    border-top: 1px solid color-mix(in srgb, var(--ds-paper) 12%, transparent);
    background: var(--clr-primary-900);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress strong {
    grid-column: 1;
    grid-row: 1;
    color: var(--ds-paper);
    font-size: 18px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress small {
    grid-column: 2;
    grid-row: 1;
    color: color-mix(in srgb, var(--ds-paper) 62%, transparent);
    font-size: 9px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress progress {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress progress::-webkit-progress-bar {
    background: color-mix(in srgb, var(--ds-paper) 16%, transparent);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress progress::-webkit-progress-value {
    background: var(--ds-gold);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-home-shell,
  body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-study-layout,
  body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-practice-shell,
  body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-progress-shell {
    width: 100%;
    min-width: 0;
    grid-column: 2;
    grid-row: 1;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-main-rail-toggle {
    top: 16px;
    right: 20px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    min-height: 116px;
    padding: 58px 10px 18px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity-copy,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-nav-label,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-top-progress small {
    display: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav {
    padding: 14px 10px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav button {
    justify-content: center;
    padding: 0;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-top-progress {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    padding: 18px 10px 20px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus {
    top: var(--nav-h, 68px);
  }

  body.course-study-app .ds-course-v2.ds-access-state {
    grid-template-columns: 248px minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr);
  }

  body.course-study-app .ds-access-shell .ds-access-course-rail {
    position: sticky;
    top: var(--nav-h, 68px);
    display: grid;
    width: auto;
    height: calc(100svh - var(--nav-h, 68px));
    min-height: 560px;
    grid-column: 1;
    grid-row: 1;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr) auto;
    align-self: start;
    align-items: start;
    overflow: hidden;
    border: 0;
    border-right: 1px solid var(--ds-line);
    background: var(--ds-paper-soft);
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  body.course-study-app .ds-access-course-identity {
    grid-column: 1;
    grid-row: 1;
    padding: 24px 22px;
    border: 0;
    border-right: 0;
    border-bottom: 1px solid var(--ds-line);
  }

  body.course-study-app .ds-access-course-nav {
    display: grid;
    grid-column: 1;
    grid-row: 2;
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    align-content: start;
    padding: 20px 12px;
    border: 0;
  }

  body.course-study-app .ds-access-course-nav > span {
    display: flex;
    min-height: 46px;
    justify-content: flex-start;
    gap: 11px;
    padding: 0 14px;
  }

  body.course-study-app .ds-access-course-nav > span.is-current {
    background: color-mix(in srgb, var(--ds-accent) 8%, var(--ds-paper-soft));
    box-shadow: inset 3px 0 0 var(--ds-accent);
  }

  body.course-study-app .ds-access-course-nav b {
    font-size: 12px;
    text-align: left;
  }

  body.course-study-app .ds-access-course-progress {
    display: grid;
    grid-column: 1;
    grid-row: 3;
    align-self: end;
    padding: 20px 22px 24px;
    border: 0;
    border-top: 1px solid var(--ds-line);
  }

  body.course-study-app .ds-access-shell-main,
  body.course-study-app .ds-access-locked-main {
    grid-column: 2;
    grid-row: 1;
  }

  body.course-study-app .ds-course-v2[data-course-surface="study"] > .ds-course-top {
    grid-template-rows: auto auto minmax(160px, 1fr) auto;
  }

  body.course-study-app .ds-course-v2[data-course-surface="study"] .ds-surface-nav {
    grid-row: 2;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  body.course-study-app .ds-course-v2[data-course-surface="study"] .ds-top-progress {
    grid-row: 4;
  }

  body.course-study-app .ds-course-top > .ds-syllabus {
    position: relative;
    z-index: 1;
    top: auto;
    display: grid;
    width: 100%;
    height: auto;
    min-height: 0;
    grid-column: 1;
    grid-row: 3;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: 52px minmax(0, 1fr);
    align-self: stretch;
    padding: 0;
    overflow: hidden;
    border: 0;
    border-top: 0;
    border-bottom: 1px solid var(--ds-line);
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  body.course-study-app .ds-course-top > .ds-syllabus .ds-syllabus-bar {
    grid-column: 1;
    grid-row: 1;
    padding: 0 18px;
    border-bottom: 1px solid var(--ds-line);
    background: var(--ds-soft);
  }

  body.course-study-app .ds-course-top > .ds-syllabus .ds-syllabus-toggle,
  body.course-study-app .is-syllabus-collapsed .ds-course-top > .ds-syllabus .ds-syllabus-toggle {
    grid-column: 2;
    grid-row: 1;
    margin-right: 12px;
  }

  body.course-study-app .ds-course-top > .ds-syllabus .ds-syllabus-inner {
    position: static;
    display: block;
    max-height: none;
    min-height: 0;
    grid-column: 1 / -1;
    grid-row: 2;
    padding: 0;
    overflow: hidden;
    border: 0;
    background: transparent;
    box-shadow: none;
  }

  body.course-study-app .is-syllabus-collapsed .ds-course-top > .ds-syllabus .ds-syllabus-inner {
    display: none;
  }

  body.course-study-app .ds-course-top > .ds-syllabus .ds-syllabus-scroll {
    display: block;
    width: 100%;
    height: 100%;
    max-height: none;
    padding: 6px 10px 18px;
    overflow-x: hidden;
    overflow-y: auto;
  }

  body.course-study-app .ds-course-top > .ds-syllabus .ds-unit {
    padding: 0;
  }

  body.course-study-app .ds-course-v2.is-syllabus-collapsed[data-course-surface="study"] > .ds-course-top {
    grid-template-rows: auto auto auto 58px auto;
  }

  body.course-study-app .ds-course-v2.is-syllabus-collapsed .ds-course-top > .ds-syllabus {
    grid-template-rows: 58px;
  }

  body.course-study-app .ds-course-v2.is-main-collapsed[data-course-surface="study"] > .ds-course-top {
    grid-template-rows: auto minmax(0, 1fr) auto;
  }

  body.course-study-app .ds-course-v2.is-main-collapsed .ds-course-top > .ds-syllabus {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 58px;
  }

  body.course-study-app .ds-course-v2.is-main-collapsed .ds-course-top > .ds-syllabus .ds-syllabus-bar,
  body.course-study-app .ds-course-v2.is-main-collapsed .ds-course-top > .ds-syllabus .ds-syllabus-inner {
    display: none;
  }

  body.course-study-app .ds-course-v2.is-main-collapsed .ds-course-top > .ds-syllabus .ds-syllabus-toggle {
    grid-column: 1;
    justify-self: center;
    margin-right: 0;
    padding: 0;
  }

  body.course-study-app .ds-course-v2.is-main-collapsed .ds-course-top > .ds-syllabus .ds-toggle-label {
    display: none;
  }

  body.course-study-app .ds-access-shell .ds-access-course-rail {
    grid-template-rows: auto auto minmax(0, 1fr) auto;
  }

  body.course-study-app .ds-access-syllabus-placeholder {
    display: grid;
    min-height: 0;
    grid-column: 1;
    grid-row: 3;
    gap: 12px;
    align-content: start;
    padding: 18px 22px;
    border-top: 1px solid var(--ds-line);
    color: var(--ds-muted);
  }

  body.course-study-app .ds-access-syllabus-placeholder strong {
    color: var(--ds-ink);
    font-size: 12px;
  }

  body.course-study-app .ds-access-syllabus-placeholder span {
    display: block;
    width: 100%;
    height: 7px;
    background: var(--ds-line);
  }

  body.course-study-app .ds-access-syllabus-placeholder span:nth-of-type(2) {
    width: 78%;
  }

  body.course-study-app .ds-access-syllabus-placeholder span:nth-of-type(3) {
    width: 88%;
  }

  body.course-study-app .ds-access-syllabus-placeholder span:nth-of-type(4) {
    width: 64%;
  }

  body.course-study-app .ds-access-course-progress {
    grid-row: 4;
  }
}

@media (max-width: 760px) {
  body.course-study-app .ds-course-v2[data-course-surface="study"] > .ds-course-top {
    position: relative;
    top: auto;
    height: 178px;
    min-height: 178px;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 62px 58px 58px;
    overflow: visible;
  }

  body.course-study-app .ds-course-v2[data-course-surface="study"] .ds-course-identity {
    grid-column: 1;
    grid-row: 1;
    padding: 8px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--ds-line);
  }

  body.course-study-app .ds-course-v2[data-course-surface="study"] .ds-surface-nav {
    grid-column: 1;
    grid-row: 2;
    gap: 0;
    padding: 0 4px;
    border: 0;
  }

  body.course-study-app .ds-course-v2[data-course-surface="study"] .ds-surface-nav button {
    min-height: 58px;
    flex-direction: column;
    gap: 4px;
    padding: 4px 2px;
  }

  body.course-study-app .ds-course-v2[data-course-surface="study"] .ds-nav-label {
    width: 100%;
    font-size: 9px;
    text-align: center;
  }

  body.course-study-app .ds-course-v2[data-course-surface="study"] .ds-top-progress {
    display: none;
  }

  body.course-study-app .ds-course-top > .ds-syllabus {
    position: relative;
    top: auto;
    width: 100%;
    height: 58px;
    min-height: 58px;
    grid-column: 1;
    grid-row: 3;
    padding: 0;
    overflow: visible;
    border: 0;
    border-bottom: 1px solid var(--ds-line);
    background: var(--ds-paper);
  }

  body.course-study-app .ds-course-top > .ds-syllabus .ds-syllabus-inner {
    top: 58px;
    z-index: 2;
    grid-row: auto;
  }

  body.course-study-app .ds-access-syllabus-placeholder {
    display: none;
  }
}

@media (min-width: 761px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-top > .ds-syllabus {
    position: relative;
    top: auto;
    width: 100%;
    height: 100%;
    min-height: 0;
    max-height: none;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: 52px minmax(0, 1fr);
    overflow: hidden;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-top > .ds-syllabus .ds-syllabus-inner {
    position: static;
    display: block;
    width: 100%;
    height: 100%;
    min-height: 0;
    max-height: none;
    grid-column: 1 / -1;
    grid-row: 2;
    padding: 0;
    overflow: hidden;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-syllabus-collapsed .ds-course-top > .ds-syllabus .ds-syllabus-inner,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-top > .ds-syllabus .ds-syllabus-inner {
    display: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-top > .ds-syllabus .ds-syllabus-scroll {
    display: block;
    width: 100%;
    height: 100%;
    max-height: none;
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 8px 12px 18px;
    overflow-x: hidden;
    overflow-y: auto;
  }
}

/* Course outline: dense editorial hierarchy for modules and lessons. */
body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-bar {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-bar strong {
  color: var(--clr-primary-900);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-bar > span {
  display: inline-flex;
  min-width: 42px;
  min-height: 24px;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border: 1px solid var(--ds-line-strong);
  border-radius: 999px;
  background: var(--ds-paper);
  color: var(--ds-muted-strong);
  font-size: 10px;
  font-weight: 800;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit {
  margin: 0;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--ds-line);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-head {
  display: grid;
  min-height: 72px;
  grid-template-columns: 32px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: center;
  padding: 11px 8px;
  color: var(--clr-primary-900);
  cursor: pointer;
  list-style: none;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-head::-webkit-details-marker {
  display: none;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-head:hover {
  background: var(--ds-soft);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit[open] > .ds-unit-head {
  background: var(--clr-primary-50);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-index {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--ds-line-strong);
  border-radius: 6px;
  background: var(--ds-paper);
  color: var(--ds-muted-strong);
  font-size: 10px;
  font-weight: 850;
  line-height: 1;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit[open] > .ds-unit-head .ds-unit-index {
  border-color: var(--ds-gold);
  background: var(--clr-primary-900);
  color: var(--ds-paper);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy {
  display: grid;
  min-width: 0;
  gap: 6px;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy strong {
  display: -webkit-box;
  min-width: 0;
  overflow: hidden;
  color: var(--ds-heading);
  font-size: 11.5px;
  font-weight: 800;
  line-height: 1.32;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy small {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 48px;
  gap: 8px;
  align-items: center;
  color: var(--ds-muted);
  font-size: 9px;
  font-weight: 720;
  line-height: 1.2;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy progress {
  width: 48px;
  height: 4px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: var(--ds-line-strong);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy progress::-webkit-progress-bar {
  background: var(--ds-line-strong);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy progress::-webkit-progress-value {
  background: var(--ds-accent);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-chevron {
  display: grid;
  width: 16px;
  height: 16px;
  place-items: center;
  color: var(--ds-muted);
  transition: transform 180ms ease;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-chevron .ds-icon {
  width: 14px;
  height: 14px;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit[open] > .ds-unit-head .ds-unit-chevron {
  transform: rotate(90deg);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-lessons {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 5px 0 10px 42px;
  background: var(--ds-paper-soft);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link {
  display: grid;
  min-height: 40px;
  grid-template-columns: 31px minmax(0, 1fr);
  gap: 7px;
  align-items: center;
  padding: 6px 8px 6px 0;
  border-radius: 0;
  color: var(--ds-muted);
  font-size: 11px;
  font-weight: 680;
  line-height: 1.32;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link:hover {
  background: var(--ds-soft);
  color: var(--ds-heading);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link.is-active {
  background: var(--ds-paper);
  color: var(--ds-accent-dark);
  box-shadow: inset 3px 0 0 var(--ds-accent);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-index {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border: 1px solid var(--ds-line-strong);
  border-radius: 50%;
  background: var(--ds-paper);
  color: var(--ds-muted);
  font-size: 9px;
  font-weight: 820;
  line-height: 1;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link.is-active .ds-lesson-index {
  border-color: var(--ds-accent);
  background: color-mix(in srgb, var(--ds-accent) 10%, var(--ds-paper));
  color: var(--ds-accent-dark);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link.is-complete .ds-lesson-index {
  border-color: var(--ds-accent);
  background: var(--ds-accent);
  color: var(--ds-paper);
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-index .ds-icon {
  width: 13px;
  height: 13px;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-title {
  min-width: 0;
}

/* Syllabus is part of the main course rail; it has no independent collapse state. */
body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-toggle {
  display: none !important;
}

body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus {
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 761px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-top > .ds-syllabus {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 52px minmax(0, 1fr);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed[data-course-surface="study"] > .ds-course-top {
    grid-template-rows: auto auto minmax(0, 1fr) auto;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-top > .ds-syllabus {
    display: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-top-progress {
    grid-row: 4;
  }
}

@media (max-width: 760px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state)[data-course-surface="study"] > .ds-course-top {
    height: auto;
    min-height: 0;
    grid-template-rows: auto auto auto;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-top > .ds-syllabus {
    height: auto;
    min-height: 0;
    grid-template-rows: 48px auto;
    overflow: hidden;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-top > .ds-syllabus .ds-syllabus-inner {
    position: static;
    display: block;
    max-height: 48svh;
    grid-row: 2;
    padding: 0;
    overflow: hidden;
    border-top: 1px solid var(--ds-line);
    border-bottom: 0;
    background: transparent;
    box-shadow: none;
  }
}

/* Unified course typography and editorial navigation rail. */
body.course-study-app .ds-course-v2 {
  font-family: var(--course-display-font);
}

body.course-study-app .ds-course-v2 :where(
    a,
    button,
    dd,
    dt,
    em,
    h1,
    h2,
    h3,
    h4,
    input,
    label,
    li,
    p,
    select,
    small,
    span,
    strong,
    table,
    textarea
  ) {
  font-family: var(--course-display-font);
}

body.course-study-app .ds-reader-paper .ds-doc-paragraph p,
body.course-study-app .ds-reader-paper .ds-doc-note p,
body.course-study-app .ds-reader-paper .ds-reader-section p {
  text-align: justify;
  text-justify: inter-word;
  hyphens: auto;
}

@media (min-width: 761px) {
  body.course-study-app .ds-course-v2:not(.ds-access-state) {
    grid-template-columns: 312px minmax(0, 1fr);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed {
    grid-template-columns: 72px minmax(0, 1fr);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) > .ds-course-top {
    border-right: 1px solid var(--ds-line);
    background: var(--ds-paper-soft);
    box-shadow: 12px 0 32px color-mix(in srgb, var(--clr-primary-900) 6%, transparent);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity {
    min-height: 88px;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 13px;
    padding: 18px 58px 18px 18px;
    border-bottom: 1px solid var(--ds-line);
    background: var(--ds-paper);
    box-shadow: inset 0 3px 0 var(--ds-gold);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity:hover {
    background: var(--ds-paper-glint);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity img {
    width: 42px;
    height: 42px;
    padding: 6px;
    border: 1px solid var(--clr-primary-800);
    border-radius: 7px;
    background: var(--clr-primary-900);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity-copy strong {
    color: var(--clr-primary-900);
    font-size: 15px;
    font-weight: 750;
    line-height: 1.18;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-identity-copy small {
    color: var(--ds-muted);
    font-size: 10px;
    font-weight: 650;
    line-height: 1.35;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-main-rail-toggle {
    top: 25px;
    right: 14px;
    width: 34px;
    min-width: 34px;
    min-height: 34px;
    border: 1px solid var(--ds-line-strong);
    border-radius: 6px;
    background: var(--ds-paper);
    color: var(--clr-primary-900);
    box-shadow: 0 4px 12px color-mix(in srgb, var(--clr-primary-900) 6%, transparent);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle:hover,
  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-main-rail-toggle:focus-visible {
    border-color: var(--ds-gold);
    background: var(--clr-primary-900);
    color: var(--ds-paper);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav {
    gap: 5px;
    padding: 13px 12px;
    border-bottom: 1px solid var(--ds-line);
    background: var(--ds-soft);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav button {
    min-height: 43px;
    gap: 10px;
    padding: 0 12px;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--ds-muted-strong);
    font-size: 12px;
    font-weight: 680;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button:hover {
    border-color: var(--ds-line);
    background: var(--ds-paper);
    color: var(--clr-primary-900);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button.is-active {
    border-color: var(--clr-primary-900);
    background: var(--clr-primary-900);
    color: var(--ds-paper);
    box-shadow: 0 8px 18px color-mix(in srgb, var(--clr-primary-900) 16%, transparent);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-surface-nav button.is-active .ds-nav-icon {
    color: var(--ds-gold);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-nav-label,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-nav-label {
    font-size: 12px;
    font-weight: 680;
  }

  body.course-study-app .ds-course-top > .ds-syllabus .ds-syllabus-bar {
    min-height: 48px;
    padding: 0 16px;
    border-bottom: 1px solid var(--ds-line);
    background: var(--ds-paper);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-bar strong {
    color: var(--clr-primary-900);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.08em;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-syllabus-bar > span {
    min-width: 40px;
    min-height: 23px;
    border-color: var(--clr-gold-light);
    border-radius: 5px;
    background: var(--clr-gold-50);
    color: var(--clr-gold-dark);
    font-size: 10px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-course-top > .ds-syllabus .ds-syllabus-scroll {
    padding: 0 10px 18px;
    scrollbar-color: var(--clr-primary-100) transparent;
    scrollbar-width: thin;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit {
    border-bottom: 1px solid var(--ds-line);
    background: transparent;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-head {
    min-height: 68px;
    grid-template-columns: 28px minmax(0, 1fr) 16px;
    gap: 9px;
    padding: 10px 7px;
    border-left: 3px solid transparent;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-head:hover {
    background: var(--ds-soft);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit[open] > .ds-unit-head {
    border-left-color: var(--ds-gold);
    background: var(--ds-soft);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-index {
    width: 28px;
    height: 28px;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--clr-gold-dark);
    font-size: 11px;
    font-weight: 800;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit[open] > .ds-unit-head .ds-unit-index {
    border: 0;
    background: transparent;
    color: var(--clr-primary-900);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy {
    gap: 5px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy strong {
    color: var(--ds-heading);
    font-size: 12px;
    font-weight: 720;
    line-height: 1.32;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-summary-copy small {
    color: var(--ds-muted);
    font-size: 9.5px;
    font-weight: 620;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-lessons {
    position: relative;
    gap: 4px;
    padding: 4px 5px 11px 38px;
    background: var(--ds-paper-soft);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-unit-lessons::before {
    content: "";
    position: absolute;
    top: 4px;
    bottom: 12px;
    left: 23px;
    width: 1px;
    background: var(--ds-line-strong);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link {
    min-height: 39px;
    grid-template-columns: 25px minmax(0, 1fr);
    gap: 8px;
    padding: 6px 8px 6px 0;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--ds-muted-strong);
    font-size: 11px;
    font-weight: 620;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link:hover {
    border-color: var(--ds-line);
    background: var(--ds-paper);
    color: var(--clr-primary-900);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link.is-active {
    border-color: color-mix(in srgb, var(--ds-accent) 30%, var(--ds-paper));
    background: color-mix(in srgb, var(--ds-accent) 10%, var(--ds-paper));
    color: var(--ds-accent-dark);
    box-shadow: none;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-index {
    position: relative;
    z-index: 1;
    width: 23px;
    height: 23px;
    border-color: var(--ds-line-strong);
    background: var(--ds-paper-soft);
    font-size: 8.5px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-lesson-link.is-active .ds-lesson-index {
    border-color: var(--ds-accent);
    background: var(--ds-accent);
    color: var(--ds-paper);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress,
  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-top-progress {
    gap: 8px 10px;
    padding: 15px 18px 18px;
    border-top: 1px solid var(--ds-line);
    background: var(--ds-paper);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress strong {
    color: var(--clr-primary-900);
    font-size: 20px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress small {
    color: var(--ds-muted);
    font-size: 9.5px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress progress::-webkit-progress-bar {
    background: var(--ds-line-strong);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state) .ds-top-progress progress::-webkit-progress-value {
    background: var(--ds-gold);
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-course-identity {
    min-height: 104px;
    padding: 52px 10px 12px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav {
    padding: 12px 9px;
  }

  body.course-study-app .ds-course-v2:not(.ds-access-state).is-main-collapsed .ds-surface-nav button {
    min-height: 42px;
  }
}