.deepdoc-hero {
  position: relative;
  padding-top: clamp(64px, 9vw, 104px);
  padding-bottom: clamp(52px, 7vw, 84px);
  overflow-x: clip;
}

.deepdoc-hero::before {
  position: absolute;
  inset: 8% 12% auto;
  height: 360px;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle at center, var(--color-panel-deep), transparent 70%);
  content: "";
  pointer-events: none;
}

.deepdoc-hero-inner {
  position: relative;
  max-width: var(--reading-width);
  margin-inline: auto;
  text-align: center;
}

.deepdoc-hero h1 {
  margin-top: 18px;
  margin-bottom: 20px;
}

.deepdoc-hero .lead {
  margin-inline: auto;
}

.deepdoc-meta {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.deepdoc-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.diagnostic-strip {
  margin-top: 46px;
  padding: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.diagnostic-step {
  position: relative;
  min-width: 0;
  padding: 16px 20px;
}

.diagnostic-step + .diagnostic-step {
  border-left: 1px solid var(--color-border);
}

.diagnostic-step strong {
  display: block;
  margin-bottom: 4px;
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 13px;
}

.diagnostic-step span {
  color: var(--color-text-soft);
  font-size: 14px;
}

.deepdoc-shell {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.deepdoc-layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, var(--reading-width));
  justify-content: center;
  align-items: start;
  gap: clamp(28px, 5vw, 68px);
}

.deepdoc-toc {
  position: sticky;
  top: 12px;
  min-width: 0;
}

.deepdoc-toc .toc-tabs {
  position: static;
  padding: 12px;
  display: grid;
  border-radius: var(--radius-large);
}

.deepdoc-toc .toc-tabs a {
  min-width: 0;
  white-space: normal;
}

.deepdoc-toc-title {
  margin: 4px 10px 10px;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.deepdoc-article {
  min-width: 0;
}

.deepdoc-article > section {
  padding-top: 24px;
  padding-bottom: 68px;
  border-bottom: 1px solid var(--color-border);
}

.deepdoc-article > section:first-child {
  padding-top: 0;
}

.deepdoc-article > section:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

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

.deepdoc-article h3 {
  color: var(--color-accent-deep);
}

.deepdoc-article .callout {
  margin: 28px 0;
}

.check-list {
  margin: 22px 0 28px;
  padding: 0;
  display: grid;
  gap: 12px;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 14px 16px 14px 46px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
}

.check-list li::before {
  position: absolute;
  top: 15px;
  left: 17px;
  color: var(--color-success);
  content: "✓";
  font-weight: 800;
}

.decision-flow {
  margin: 26px 0;
  padding: 22px;
  display: grid;
  gap: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-panel-deep);
}

.decision-item {
  position: relative;
  padding-left: 28px;
  color: var(--color-text-soft);
}

.decision-item::before {
  position: absolute;
  top: 0.62em;
  left: 4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  content: "";
}

.decision-item + .decision-item::after {
  position: absolute;
  bottom: calc(100% + 2px);
  left: 7px;
  width: 1px;
  height: 14px;
  background: var(--color-border);
  content: "";
}

.command-label {
  margin-bottom: 8px;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.symptom-table td {
  color: var(--color-text-soft);
}

.symptom-table code {
  white-space: nowrap;
}

.ticket-card {
  margin-top: 30px;
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-large);
  background: var(--color-panel-deep);
}

.ticket-card h3 {
  color: var(--color-text);
}

.ticket-template {
  white-space: pre-wrap;
}

.related-links {
  margin-top: 36px;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-panel);
}

.related-links h3 {
  font-size: 20px;
}

.related-links ul {
  margin: 0;
  padding-left: 20px;
}

.related-links li + li {
  margin-top: 8px;
}

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

  .deepdoc-toc {
    position: relative;
    top: auto;
  }

  .deepdoc-toc .toc-tabs {
    position: sticky;
    top: 12px;
    padding: 7px;
    display: flex;
    border-radius: var(--radius-medium);
  }

  .deepdoc-toc .toc-tabs a {
    min-width: max-content;
    white-space: nowrap;
  }

  .deepdoc-toc-title {
    display: none;
  }
}

@media (max-width: 768px) {
  .diagnostic-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .diagnostic-step:nth-child(3) {
    border-left: 0;
  }

  .diagnostic-step:nth-child(n + 3) {
    border-top: 1px solid var(--color-border);
  }
}

@media (max-width: 640px) {
  .deepdoc-hero {
    padding-top: 52px;
  }

  .deepdoc-actions {
    width: 100%;
  }

  .deepdoc-actions .btn-primary,
  .deepdoc-actions .btn-secondary {
    width: 100%;
  }

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

  .diagnostic-step + .diagnostic-step,
  .diagnostic-step:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--color-border);
  }

  .deepdoc-article > section {
    padding-bottom: 58px;
  }

  .check-list li {
    padding-right: 14px;
  }
}