.deepdoc-hero {
  position: relative;
  overflow: clip;
  padding-top: 72px;
  padding-bottom: 82px;
  background: var(--color-canvas);
}

.deepdoc-atmosphere {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(640px 460px at 12% 22%, var(--color-halo-warm), transparent 72%),
    radial-gradient(720px 520px at 88% 24%, var(--color-halo-green), transparent 74%),
    radial-gradient(var(--color-dot-grid) 1px, transparent 1.4px);
  background-size: auto, auto, 28px 28px;
  -webkit-mask-image: linear-gradient(to bottom, var(--color-ink), transparent);
  mask-image: linear-gradient(to bottom, var(--color-ink), transparent);
}

.deepdoc-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  align-items: center;
  gap: 64px;
}

.deepdoc-hero-copy {
  min-width: 0;
}

.deepdoc-hero-copy h1 {
  margin-top: 20px;
  margin-bottom: 0;
}

.deepdoc-lede {
  max-width: 660px;
  margin-top: 24px;
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: clamp(18px, 2vw, 21px);
}

.deepdoc-hero-copy .button-row {
  margin-top: 30px;
}

.deepdoc-scope {
  max-width: 640px;
  margin-top: 24px;
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.deepdoc-scope a {
  color: var(--color-accent-deep);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.deepdoc-route-figure {
  min-width: 0;
  overflow: clip;
  border-radius: var(--radius-large);
  background: var(--color-night);
  box-shadow: var(--shadow-card);
}

.deepdoc-figure-top {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 13px 20px;
  border-bottom: 1px solid var(--color-night-line);
  background: var(--color-night-soft);
}

.deepdoc-route-figure svg {
  width: 100%;
  height: auto;
  padding: 10px;
}

.doc-grid-line {
  fill: none;
  stroke: var(--color-cream-line);
  stroke-width: 1;
  stroke-dasharray: 3 9;
  opacity: .1;
}

.doc-route-line {
  fill: none;
  stroke: var(--color-cream-line);
  stroke-width: 1.7;
  opacity: .74;
}

.doc-route-line-secondary {
  stroke-dasharray: 5 8;
  opacity: .3;
}

.doc-route-ring {
  fill: none;
  stroke: var(--color-cream-line);
  stroke-width: 1;
  opacity: .36;
}

.doc-route-node,
.doc-route-flow {
  fill: var(--color-cream-dot);
}

.doc-route-flow {
  animation: doc-flow 3.3s ease-in-out infinite;
}

.doc-route-flow-late {
  animation-delay: 1.1s;
}

.doc-route-label {
  fill: var(--color-cream-text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.deepdoc-figure-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding: 18px 22px 22px;
  border-top: 1px solid var(--color-night-line);
  color: var(--color-cream-text);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
}

.deepdoc-figure-legend span {
  position: relative;
  padding-left: 15px;
}

.deepdoc-figure-legend span::before {
  position: absolute;
  top: .62em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-warning);
  content: "";
}

.deepdoc-band {
  border-top: 1px solid var(--color-night-line);
  background: var(--color-night);
  color: var(--color-cream-text);
}

.deepdoc-band-inner {
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  gap: 16px 28px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  scrollbar-width: thin;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.deepdoc-layout {
  padding-top: 70px;
  padding-bottom: var(--section-space);
}

.deepdoc-toc {
  top: 12px;
  margin-bottom: 64px;
}

.deepdoc-prose {
  margin-inline: auto;
}

.article-intro {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.7;
}

.deepdoc-section {
  padding-top: 18px;
}

.deepdoc-section + .deepdoc-section {
  margin-top: 86px;
  padding-top: 76px;
  border-top: 1px solid var(--color-line);
}

.deepdoc-section h2 {
  margin-top: 0;
}

.deepdoc-section h3 {
  margin-top: 42px;
}

.deepdoc-section p + p {
  margin-top: 18px;
}

.deepdoc-section .table-scroll {
  margin-top: 34px;
  margin-bottom: 34px;
}

.deepdoc-section pre {
  margin-top: 28px;
  margin-bottom: 28px;
}

.maintenance-checklist {
  margin: 34px 0;
  padding: 30px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-large);
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
}

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

.maintenance-checklist ul {
  display: grid;
  gap: 12px;
  margin-bottom: 0;
  padding-left: 22px;
}

.maintenance-checklist li {
  color: var(--color-ink-muted);
}

@keyframes doc-flow {
  0%,
  100% {
    opacity: .24;
    transform: translateX(-7px);
  }

  50% {
    opacity: 1;
    transform: translateX(7px);
  }
}

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

  .deepdoc-route-figure {
    width: min(100%, 720px);
    margin-inline: auto;
  }
}

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 52px;
    padding-bottom: 58px;
  }

  .deepdoc-hero-inner {
    gap: 42px;
  }

  .deepdoc-band-inner {
    justify-content: flex-start;
  }

  .deepdoc-layout {
    padding-top: 52px;
  }

  .deepdoc-toc {
    margin-bottom: 48px;
  }

  .article-intro {
    font-size: 20px;
  }

  .deepdoc-section + .deepdoc-section {
    margin-top: 66px;
    padding-top: 58px;
  }
}

@media (max-width: 520px) {
  .deepdoc-figure-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .deepdoc-route-figure svg {
    padding: 4px;
  }

  .doc-route-label {
    font-size: 10px;
  }

  .deepdoc-figure-legend {
    gap: 10px 16px;
  }

  .maintenance-checklist {
    padding: 24px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .doc-route-flow {
    animation: none;
  }
}