:root {
  --doc-hero-space-top: clamp(44px, 7vw, 88px);
  --doc-hero-space-bottom: clamp(48px, 7vw, 82px);
  --doc-layout-gap: clamp(28px, 5vw, 68px);
  --doc-sidebar-width: 226px;
  --doc-section-gap: clamp(64px, 9vw, 108px);
  --doc-copy-size: 16px;
  --doc-copy-leading: 1.86;
  --doc-map-padding: clamp(16px, 2.5vw, 26px);
  --doc-map-shadow: 0 24px 62px var(--color-shadow-strong);
  --doc-grid-line: var(--preview-deep-grid);
  --doc-route-glow: var(--trail-glow);
  --doc-node-fill: var(--color-deep-raised);
  --doc-node-stroke: var(--color-cyan);
  --doc-check-fill: var(--color-cyan-tint);
  --doc-sidebar-offset: calc(var(--header-height) + 18px);
}

.doc-hero {
  position: relative;
  overflow: hidden;
  padding-top: var(--doc-hero-space-top);
  padding-bottom: var(--doc-hero-space-bottom);
  background:
    radial-gradient(circle at 78% 18%, var(--color-cyan-glow), var(--color-transparent) 34%),
    radial-gradient(circle at 86% 78%, var(--color-pink-glow), var(--color-transparent) 32%),
    var(--color-deep);
}

.doc-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--preview-deep-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--preview-deep-grid) 1px, var(--color-transparent) 1px);
  background-size: 38px 38px;
  content: '';
  mask-image: linear-gradient(90deg, var(--color-transparent), var(--color-deep), var(--color-transparent));
  pointer-events: none;
}

.doc-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  align-items: center;
  gap: clamp(36px, 6vw, 82px);
}

.doc-hero__copy {
  min-width: 0;
}

.doc-hero h1 {
  margin-top: 24px;
  margin-bottom: 20px;
  color: var(--color-hero-text);
  font-size: clamp(52px, 5vw, 70px);
}

.doc-hero__lead {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--color-hero-muted);
  font-size: 17px;
  line-height: 1.8;
}

.doc-hero .button-row {
  margin-top: 28px;
}

.doc-hero__visual {
  min-width: 0;
}

.access-map {
  position: relative;
  padding: var(--doc-map-padding);
  overflow: hidden;
  border: 1px solid var(--color-deep-line);
  border-radius: var(--radius-card);
  background:
    radial-gradient(circle at 76% 20%, var(--color-pink-glow), var(--color-transparent) 30%),
    var(--color-deep-raised);
  box-shadow: var(--doc-map-shadow);
}

.access-map::after {
  position: absolute;
  inset: 0;
  border: 1px solid var(--color-hero-line);
  border-radius: inherit;
  content: '';
  pointer-events: none;
}

.access-map__head,
.access-map__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--color-hero-faint);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.access-map__head {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-deep-line);
}

.access-map svg {
  width: 100%;
  height: auto;
  margin-block: 10px;
}

.access-map__grid {
  fill: none;
  stroke: var(--doc-grid-line);
  stroke-width: 1;
}

.access-map__route {
  fill: none;
  stroke: url(#docRoute);
  stroke-linecap: round;
  stroke-width: 5;
}

.access-map__route-glow {
  fill: none;
  stroke: var(--doc-route-glow);
  stroke-linecap: round;
  stroke-width: 18;
  filter: url(#docGlow);
}

.access-map__node circle:first-child {
  fill: var(--doc-node-fill);
  stroke: var(--doc-node-stroke);
  stroke-width: 2;
}

.access-map__node circle:last-child {
  fill: var(--color-cyan);
}

.access-map__node--end circle:first-child {
  stroke: var(--color-accent-end);
}

.access-map__node--end circle:last-child {
  fill: var(--color-accent-end);
}

.access-map__labels rect {
  fill: var(--color-deep);
  stroke: var(--color-deep-line);
}

.access-map__labels text {
  fill: var(--color-hero-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.access-map__foot {
  flex-wrap: wrap;
  justify-content: flex-start;
  padding-top: 14px;
  border-top: 1px solid var(--color-deep-line);
}

.access-map__foot span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.access-map__foot i {
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-cyan);
}

.doc-layout {
  display: grid;
  grid-template-columns: var(--doc-sidebar-width) minmax(0, 1fr);
  align-items: start;
  gap: var(--doc-layout-gap);
  padding-top: clamp(40px, 6vw, 72px);
  padding-bottom: var(--section-space);
}

.doc-sidebar {
  position: sticky;
  top: var(--doc-sidebar-offset);
  min-width: 0;
}

.doc-sidebar__label {
  margin-bottom: 12px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.1em;
}

.doc-sidebar .toc-tabs {
  position: static;
  display: grid;
  gap: 4px;
  overflow: visible;
  padding: 8px;
  box-shadow: none;
}

.doc-sidebar .toc-tabs a {
  width: 100%;
  min-width: 0;
  white-space: normal;
}

.doc-article {
  min-width: 0;
  max-width: var(--prose-max);
}

.doc-intro {
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
}

.doc-intro p:last-child {
  margin-bottom: 0;
}

.doc-section {
  padding-top: var(--doc-section-gap);
}

.doc-section > .eyebrow {
  margin-bottom: 16px;
}

.doc-section h2 {
  margin-bottom: 28px;
}

.doc-section h3 {
  margin-top: 34px;
  margin-bottom: 12px;
  font-size: clamp(20px, 2.4vw, 25px);
}

.doc-section p,
.doc-section li,
.doc-intro p {
  font-size: var(--doc-copy-size);
  line-height: var(--doc-copy-leading);
}

.doc-section p {
  margin-bottom: 18px;
}

.doc-section .table-scroll {
  margin-block: 30px;
}

.doc-section pre {
  margin-block: 24px;
}

.doc-section .callout {
  margin-block: 30px;
}

.doc-checklist {
  margin-top: 38px;
  padding: clamp(22px, 4vw, 32px);
  border: 1px solid var(--color-cyan);
  border-radius: var(--radius-lg);
  background: var(--doc-check-fill);
}

.doc-checklist h3 {
  margin-top: 0;
}

.doc-checklist ol {
  display: grid;
  gap: 12px;
  margin-bottom: 0;
}

.doc-checklist li {
  padding-left: 6px;
  color: var(--color-text-muted);
}

.doc-checklist strong {
  color: var(--color-text);
}

.doc-article .article-promo {
  max-width: 100%;
}

@media (max-width: 980px) {
  .doc-hero__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .doc-hero__visual {
    width: 100%;
    max-width: 720px;
  }

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

  .doc-sidebar {
    position: relative;
    top: auto;
    z-index: 40;
  }

  .doc-sidebar__label {
    display: none;
  }

  .doc-sidebar .toc-tabs {
    position: sticky;
    top: var(--toc-top);
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding: 7px;
    box-shadow: 0 4px 16px var(--color-shadow);
  }

  .doc-sidebar .toc-tabs a {
    width: auto;
    white-space: nowrap;
  }

  .doc-article {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .doc-hero h1 {
    font-size: clamp(32px, 10vw, 40px);
  }

  .doc-hero__lead {
    font-size: 15px;
  }

  .doc-hero__visual {
    margin-top: 4px;
  }

  .access-map {
    border-radius: var(--radius-lg);
  }

  .access-map__labels text {
    font-size: 0;
  }

  .access-map__foot {
    display: grid;
  }

  .doc-layout {
    gap: 18px;
  }

  .doc-section p,
  .doc-section li,
  .doc-intro p {
    font-size: 15px;
    line-height: 1.82;
  }

  .doc-section h3 {
    margin-top: 28px;
  }

  .doc-checklist {
    padding: 18px;
  }
}