:root {
  --sub-ink: #20242b;
  --sub-body: #4f5863;
  --sub-muted: #737c86;
  --sub-line: #e1e5e8;
  --sub-soft: #f7f9fa;
  --sub-violet: #625dac;
  --sub-blue: #4f67ff;
  --sub-green: #c9ff55;
  --sub-green-ink: #354b08;
  --sub-measure: 1180px;
}

body.blueprint-subpage {
  color: var(--sub-body);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

.blueprint-subpage .progress,
.blueprint-subpage .reading-progress {
  height: 2px;
  background: linear-gradient(90deg, var(--sub-violet), var(--sub-blue), var(--sub-green));
}

.blueprint-subpage .topbar {
  border-bottom: 1px solid var(--sub-line);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(16px);
}

.blueprint-subpage .topbar-inner {
  width: min(var(--sub-measure), calc(100% - 48px));
  min-height: 64px;
}

.blueprint-subpage .brand {
  color: var(--sub-ink);
  font-size: 14px;
  font-weight: 760;
  text-decoration: none;
}

.blueprint-subpage .brand-mark {
  width: 27px;
  height: 27px;
  border: 1px solid #343a43;
  border-radius: 6px;
  background: var(--sub-ink);
  box-shadow: none;
}

.blueprint-subpage .brand-mark::before {
  width: 7px;
  height: 7px;
  border: 0;
  border-radius: 50%;
  background: var(--sub-green);
  box-shadow: none;
}

.blueprint-subpage .brand-mark::after {
  height: 2px;
  border-radius: 0;
  background: var(--sub-blue);
}

.blueprint-subpage .brand small {
  color: var(--sub-muted);
  font-size: 9px;
}

.blueprint-subpage .top-actions,
.blueprint-subpage .hero-tags,
.blueprint-subpage .hero-links {
  gap: 8px;
}

.blueprint-subpage .top-link,
.blueprint-subpage .back-link,
.blueprint-subpage .top-actions a {
  border: 0;
  border-radius: 4px;
  color: #5a636e;
  background: transparent;
  box-shadow: none;
}

.blueprint-subpage .back-link,
.blueprint-subpage .top-actions a:last-child {
  color: #fff;
  background: var(--sub-ink);
}

.blueprint-subpage h1,
.blueprint-subpage h2,
.blueprint-subpage h3,
.blueprint-subpage h4,
.blueprint-subpage strong {
  color: var(--sub-ink);
  letter-spacing: 0;
}

.blueprint-subpage .eyebrow,
.blueprint-subpage .section-kicker {
  color: var(--sub-violet);
  font-size: 16px;
  font-weight: 760;
  line-height: 1.4;
  text-transform: none;
}

.blueprint-subpage .eyebrow::before,
.blueprint-subpage .section-kicker::before {
  width: 26px;
  height: 3px;
  border-radius: 0;
  background: linear-gradient(90deg, var(--sub-violet), var(--sub-blue), var(--sub-green));
}

.blueprint-subpage .hero {
  width: min(var(--sub-measure), calc(100% - 48px));
  min-height: 0;
  margin: 0 auto;
  padding: 72px 0 76px;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: 38px;
}

.blueprint-subpage .hero h1 {
  max-width: 930px;
  margin-bottom: 22px;
  font-size: clamp(44px, 5vw, 64px);
  line-height: 1.08;
}

.blueprint-subpage .hero-lead {
  max-width: 840px;
  color: var(--sub-body);
  font-size: 18px;
  line-height: 1.72;
}

.blueprint-subpage .section,
.blueprint-subpage .section.alt,
.blueprint-subpage .section.dark,
.blueprint-subpage .dark-section,
.blueprint-subpage .section:nth-of-type(even),
.blueprint-subpage .dark-section:nth-of-type(even) {
  color: var(--sub-body);
  background: #fff;
  border-color: var(--sub-line);
}

.blueprint-subpage .section-inner {
  width: min(var(--sub-measure), calc(100% - 48px));
  margin: 0 auto;
}

.blueprint-subpage .section-head {
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: 14px;
}

.blueprint-subpage .section-head h2 {
  max-width: 900px;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.16;
}

.blueprint-subpage .section-summary,
.blueprint-subpage .dark .section-summary,
.blueprint-subpage .dark-section .section-summary {
  max-width: 820px;
  color: var(--sub-muted);
  font-size: 15px;
  line-height: 1.75;
}

.blueprint-subpage .dark-section .section-kicker,
.blueprint-subpage .dark-section .content,
.blueprint-subpage .dark .section-kicker,
.blueprint-subpage .dark .content {
  color: inherit;
}

.blueprint-subpage .section,
.blueprint-subpage .section-inner {
  box-shadow: none;
}

.blueprint-subpage .star-card,
.blueprint-subpage .user-scene,
.blueprint-subpage .mode-copy,
.blueprint-subpage .matrix-wrap,
.blueprint-subpage .day-grid,
.blueprint-subpage .panel,
.blueprint-subpage .compare-item,
.blueprint-subpage .anatomy-item,
.blueprint-subpage .triad-item,
.blueprint-subpage .guardrail,
.blueprint-subpage .figure-shell,
.blueprint-subpage .concept-row,
.blueprint-subpage .definition,
.blueprint-subpage .quiz,
.blueprint-subpage .hero-map,
.blueprint-subpage .agent-screen {
  border-color: var(--sub-line);
  border-radius: 6px;
  box-shadow: none;
}

.blueprint-subpage .hero-map,
.blueprint-subpage .agent-screen {
  width: 100%;
  min-height: 0;
  background: var(--sub-soft);
}

.blueprint-subpage .hero-map::before,
.blueprint-subpage .agent-screen::before {
  opacity: .18;
}

.blueprint-subpage .route-switch,
.blueprint-subpage .dual-tabs,
.blueprint-subpage .mode-tabs {
  border-color: var(--sub-line);
  border-radius: 5px;
  background: #fff;
}

.blueprint-subpage .route-button.is-active,
.blueprint-subpage .dual-tab.is-active,
.blueprint-subpage .mode-tab.is-active {
  color: #fff;
  background: var(--sub-violet);
}

.blueprint-subpage .source-band,
.blueprint-subpage footer {
  border-top: 1px solid var(--sub-line);
  color: var(--sub-muted);
  background: var(--sub-soft);
}

/* Product function plan: wider reading column with navigation on the right. */
.function-plan-page {
  --sub-measure: 1440px;
  --shell: 1440px;
  --content: 1120px;
}

.function-plan-page .page {
  width: min(var(--sub-measure), calc(100% - 48px));
  padding: 58px 0 120px;
  grid-template-columns: minmax(0, 1fr) 232px;
  justify-content: stretch;
  gap: 48px;
}

.function-plan-page .article {
  grid-column: 1;
  grid-row: 1;
  width: 100%;
  max-width: none;
  padding: 34px 54px 88px 0;
  border: 0;
  border-radius: 0;
  background: #fff;
  box-shadow: none;
}

.function-plan-page .article::before {
  width: 72px;
  height: 3px;
  border-radius: 0;
}

.function-plan-page .toc {
  grid-column: 2;
  grid-row: 1;
  padding: 4px 0 4px 18px;
  border-left: 1px solid var(--sub-line);
}

.function-plan-page .toc nav {
  border-left: 0;
}

.function-plan-page .toc a {
  padding: 7px 8px 7px 12px;
  border-left: 2px solid transparent;
  font-size: 12px;
}

.function-plan-page .toc a:hover,
.function-plan-page .toc a.is-active {
  border-left-color: var(--sub-violet);
  background: var(--sub-soft);
}

.function-plan-page .article > h1 {
  max-width: 920px;
  font-size: clamp(44px, 5vw, 64px);
}

.function-plan-page .article h2 {
  font-size: 32px;
}

.function-plan-page .article h2::before {
  left: 0;
  bottom: -2px;
  width: 52px;
  height: 3px;
  background: linear-gradient(90deg, var(--sub-violet), var(--sub-blue), var(--sub-green));
}

/* Apple Health reference: convert dashboard bands into one light article system. */
.apple-health-page {
  --sub-measure: 1280px;
}

.apple-health-page .hero-summary {
  max-width: 980px;
  padding: 0;
  border: 0;
  border-top: 1px solid var(--sub-line);
  border-radius: 0;
  color: var(--sub-body);
  background: #fff;
  box-shadow: none;
}

.apple-health-page .summary-label {
  display: block;
  padding-top: 18px;
  color: var(--sub-violet);
}

.apple-health-page .summary-grid {
  margin-top: 12px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  background: transparent;
}

.apple-health-page .summary-item {
  min-height: 92px;
  padding: 16px 18px;
  border-left: 1px solid var(--sub-line);
  background: #fff;
}

.apple-health-page .summary-item:last-child {
  border-right: 1px solid var(--sub-line);
}

.apple-health-page .summary-item strong {
  color: var(--sub-violet);
}

.apple-health-page .summary-item span {
  color: var(--sub-muted);
}

.apple-health-page .assumption-band,
.apple-health-page .comparison-band {
  border-color: var(--sub-line);
  background: #fff;
}

.apple-health-page .assumption-inner,
.apple-health-page .comparison-inner,
.apple-health-page .table-section {
  width: min(var(--sub-measure), calc(100% - 48px));
}

.apple-health-page .assumption-tag {
  color: var(--sub-green-ink);
  background: var(--sub-green);
}

.apple-health-page .diff-badge,
.apple-health-page .filter-button,
.apple-health-page .search-wrap,
.apple-health-page .table-shell {
  border-color: var(--sub-line);
  border-radius: 4px;
  box-shadow: none;
}

.apple-health-page .filter-button.is-active {
  color: #fff;
  background: var(--sub-violet);
}

.apple-health-page .table-shell {
  background: #fff;
}

@media (max-width: 980px) {
  .function-plan-page .page {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 28px;
  }

  .function-plan-page .toc {
    position: relative;
    top: auto;
    grid-column: 1;
    grid-row: 1;
    width: 100%;
    max-height: none;
    padding: 0;
    overflow: hidden;
    border-left: 0;
  }

  .function-plan-page .toc nav {
    display: flex;
    width: 100%;
    overflow-x: auto;
    gap: 6px;
    padding-bottom: 8px;
  }

  .function-plan-page .toc a {
    min-width: max-content;
    padding: 7px 10px;
    grid-template-columns: auto 1fr;
    border: 1px solid var(--sub-line);
    border-radius: 4px;
  }

  .function-plan-page .article {
    grid-column: 1;
    grid-row: 2;
    padding-right: 0;
  }
}

@media (max-width: 680px) {
  .blueprint-subpage .topbar-inner,
  .blueprint-subpage .hero,
  .blueprint-subpage .section-inner,
  .apple-health-page .assumption-inner,
  .apple-health-page .comparison-inner,
  .apple-health-page .table-section,
  .function-plan-page .page,
  .function-plan-page .doc-footer {
    width: calc(100% - 32px);
  }

  .blueprint-subpage .brand small,
  .blueprint-subpage .top-link {
    display: none;
  }

  .blueprint-subpage .hero {
    padding: 44px 0 52px;
    gap: 26px;
  }

  .blueprint-subpage .hero h1 {
    font-size: 36px;
    line-height: 1.15;
  }

  .blueprint-subpage .hero-lead {
    font-size: 16px;
  }

  .blueprint-subpage .eyebrow,
  .blueprint-subpage .section-kicker {
    font-size: 15px;
  }

  .blueprint-subpage .section-head h2 {
    font-size: 34px;
    line-height: 1.2;
  }

  .function-plan-page .article {
    padding: 36px 0 64px;
  }

  .function-plan-page .article > h1 {
    font-size: 36px;
  }

  .function-plan-page .article h2 {
    font-size: 28px;
  }

  .apple-health-page .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .apple-health-page .summary-item:nth-child(3) {
    border-top: 1px solid var(--sub-line);
  }

  .apple-health-page .summary-item:nth-child(4) {
    border-top: 1px solid var(--sub-line);
    border-right: 1px solid var(--sub-line);
  }
}