.deepdoc-hero {
  position: relative;
  max-width: 100%;
  overflow-x: clip;
  padding-top: 88px;
  padding-bottom: 88px;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(circle at top, var(--color-glow), transparent),
    linear-gradient(180deg, var(--color-bg-top), var(--color-bg-bottom));
}

.deepdoc-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, var(--color-text), transparent);
}

.deepdoc-hero .wrap {
  position: relative;
  z-index: 1;
}

.deepdoc-hero-copy {
  display: flex;
  max-width: 920px;
  margin-inline: auto;
  align-items: center;
  flex-direction: column;
  text-align: center;
}

.deepdoc-hero h1 {
  max-width: 820px;
  margin-top: 22px;
}

.deepdoc-lead {
  max-width: 780px;
  margin: 24px 0 0;
  color: var(--color-muted);
  font-size: 19px;
  line-height: 1.75;
}

.deepdoc-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.deepdoc-facts {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 46px 0 0;
  padding: 1px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-medium);
  background: var(--color-border-soft);
  box-shadow: var(--shadow-soft);
  list-style: none;
}

.deepdoc-facts li {
  min-width: 0;
  padding: 20px;
  background: var(--color-panel);
}

.deepdoc-facts li:first-child {
  border-radius: var(--radius-small) 0 0 var(--radius-small);
}

.deepdoc-facts li:last-child {
  border-radius: 0 var(--radius-small) var(--radius-small) 0;
}

.deepdoc-facts strong,
.deepdoc-facts span {
  display: block;
}

.deepdoc-facts strong {
  overflow-wrap: anywhere;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 13px;
}

.deepdoc-facts span {
  margin-top: 7px;
  color: var(--color-muted);
  font-size: 12px;
}

.deepdoc-shell {
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px),
    var(--color-bg);
  background-size: 48px 48px;
}

.deepdoc-article {
  max-width: 980px;
}

.deepdoc-article .toc-tabs {
  top: 12px;
  margin-bottom: 56px;
}

.deepdoc-intro {
  max-width: var(--reading-width);
  margin: 0 auto 72px;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft), inset 0 1px 0 var(--color-highlight);
}

.deepdoc-intro p {
  margin-bottom: 14px;
  color: var(--color-muted);
  font-size: 17px;
}

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

.deepdoc-chapter {
  max-width: var(--reading-width);
  margin-inline: auto;
  padding-top: 32px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--color-border);
}

.deepdoc-chapter + .deepdoc-chapter {
  padding-top: 80px;
}

.deepdoc-chapter:last-of-type {
  border-bottom: 0;
}

.chapter-kicker {
  display: block;
  margin-bottom: 16px;
  color: var(--color-faint);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
}

.deepdoc-chapter h2 {
  margin-bottom: 36px;
}

.deepdoc-chapter h3 {
  margin-top: 42px;
  font-size: 23px;
}

.deepdoc-chapter h2 + h3 {
  margin-top: 0;
}

.deepdoc-chapter p {
  margin-bottom: 20px;
  font-size: 16px;
  line-height: 1.9;
}

.deepdoc-chapter .callout {
  margin: 32px 0;
}

.deepdoc-chapter pre {
  margin: 26px 0;
}

.deepdoc-chapter .table-scroll {
  margin: 32px 0;
}

.deepdoc-table {
  width: 100%;
  min-width: 720px;
}

.deepdoc-table th {
  white-space: nowrap;
}

.deepdoc-table th,
.deepdoc-table td {
  word-break: keep-all;
}

.deepdoc-table td {
  color: var(--color-muted);
  background: var(--color-panel);
}

.platform-diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 32px 0;
}

.platform-diagnostic {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-highlight);
}

.platform-diagnostic h3 {
  margin-top: 0;
  font-size: 18px;
}

.platform-diagnostic p {
  margin-bottom: 0;
  font-size: 14px;
  line-height: 1.75;
}

.ticket-template {
  margin: 28px 0;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel-sunk);
}

.ticket-template-title {
  margin-bottom: 12px;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.ticket-template pre {
  margin: 0;
}

.deepdoc-promo {
  max-width: var(--reading-width);
  margin: 40px auto 0;
}

.deepdoc-promo h2 {
  margin-bottom: 0;
  font-size: 30px;
}

.deepdoc-promo .btn {
  flex-shrink: 0;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .deepdoc-lead {
    font-size: 16px;
  }

  .deepdoc-facts {
    grid-template-columns: 1fr;
  }

  .deepdoc-facts li:first-child {
    border-radius: var(--radius-small) var(--radius-small) 0 0;
  }

  .deepdoc-facts li:last-child {
    border-radius: 0 0 var(--radius-small) var(--radius-small);
  }

  .deepdoc-article .toc-tabs {
    margin-bottom: 40px;
  }

  .deepdoc-intro {
    margin-bottom: 56px;
    padding: 22px;
  }

  .deepdoc-chapter {
    padding-bottom: 64px;
  }

  .deepdoc-chapter + .deepdoc-chapter {
    padding-top: 64px;
  }

  .platform-diagnostic-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .deepdoc-hero {
    padding-top: 48px;
    padding-bottom: 52px;
  }

  .deepdoc-actions {
    width: 100%;
    flex-direction: column;
  }

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

  .deepdoc-facts {
    margin-top: 34px;
  }

  .deepdoc-intro {
    padding: 18px;
  }

  .deepdoc-intro p {
    font-size: 15px;
  }

  .deepdoc-chapter h2 {
    margin-bottom: 28px;
  }

  .deepdoc-chapter h3 {
    margin-top: 34px;
    font-size: 21px;
  }

  .deepdoc-chapter p {
    font-size: 15px;
  }

  .ticket-template {
    padding: 16px;
  }

  .deepdoc-promo {
    padding: 24px;
  }
}