:root {
  --deepdoc-rule-width: 1px;
  --deepdoc-reading-offset: 78px;
  --deepdoc-night-panel: var(--color-chip-dark);
  --deepdoc-night-rule: var(--color-night-line);
}

.deepdoc-hero {
  border-bottom: var(--deepdoc-rule-width) solid var(--color-border);
  padding-top: clamp(64px, 9vw, 112px);
  padding-bottom: clamp(52px, 7vw, 84px);
  background: var(--color-canvas);
  color: var(--color-ink);
}

.deepdoc-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(280px, 4fr);
  gap: clamp(36px, 7vw, 96px);
  align-items: end;
}

.deepdoc-hero__summary {
  max-width: 730px;
  margin-bottom: 0;
  color: var(--color-ink-soft);
  font-family: var(--font-serif);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.7;
}

.deepdoc-hero__note {
  border-top: var(--deepdoc-rule-width) solid var(--color-border-strong);
  padding-top: 22px;
  color: var(--color-ink-soft);
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.75;
}

.deepdoc-hero__note p {
  margin-bottom: 0;
}

.deepdoc-hero__note a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-thickness: var(--deepdoc-rule-width);
  text-underline-offset: 4px;
}

.deepdoc-index {
  display: grid;
  margin-top: clamp(42px, 7vw, 76px);
  grid-template-columns: repeat(8, minmax(0, 1fr));
  border-top: var(--deepdoc-rule-width) solid var(--color-border);
  border-bottom: var(--deepdoc-rule-width) solid var(--color-border);
}

.deepdoc-index span {
  overflow: hidden;
  padding: 13px 10px;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.deepdoc-index span + span {
  border-left: var(--deepdoc-rule-width) solid var(--color-border);
}

.deepdoc-toc-section {
  border-bottom: var(--deepdoc-rule-width) solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink);
}

.deepdoc-toc-section .toc-horizontal a {
  background: var(--color-canvas);
}

.deepdoc-toc-note {
  max-width: 780px;
  margin-top: 18px;
  margin-bottom: 0;
  color: var(--color-ink-soft);
  font-size: 13px;
}

.deepdoc-body {
  background: var(--color-canvas);
}

.doc-chapter {
  scroll-margin-top: 24px;
  border-bottom: var(--deepdoc-rule-width) solid var(--color-border);
}

.doc-chapter--surface {
  background: var(--color-surface);
  color: var(--color-ink);
}

.doc-chapter__head {
  display: grid;
  margin-bottom: 36px;
  grid-template-columns: var(--deepdoc-reading-offset) minmax(0, 1fr);
  align-items: start;
}

.doc-chapter__number {
  padding-top: 8px;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}

.doc-chapter__head .eyebrow {
  margin-bottom: 12px;
}

.doc-chapter__head h2 {
  margin-bottom: 0;
}

.doc-chapter .serif-lead {
  margin-bottom: 42px;
  padding-bottom: 32px;
  border-bottom: var(--deepdoc-rule-width) solid var(--color-border);
}

.doc-chapter h3 {
  margin-top: 2.1em;
}

.doc-chapter pre {
  margin-top: 30px;
  margin-bottom: 34px;
}

.doc-chapter .table-scroll {
  margin-top: 30px;
  margin-bottom: 34px;
}

.doc-chapter--night {
  border-bottom-color: var(--deepdoc-night-rule);
  background: var(--color-night);
  color: var(--color-night-ink);
}

.doc-chapter--night h2,
.doc-chapter--night h3 {
  color: var(--color-night-ink);
}

.doc-chapter--night .doc-chapter__number,
.doc-chapter--night .eyebrow {
  color: var(--color-night-soft);
}

.doc-chapter--night .serif-lead {
  border-bottom-color: var(--deepdoc-night-rule);
  color: var(--color-night-ink);
}

.doc-chapter--night code {
  background: var(--deepdoc-night-panel);
  color: var(--color-night-ink);
}

.doc-chapter--night pre {
  border-color: var(--color-border-strong);
  background: var(--deepdoc-night-panel);
}

.doc-chapter--night .callout {
  border-color: var(--color-border-strong);
  background: var(--color-surface);
  color: var(--color-ink);
}

.doc-chapter--night .table-scroll {
  border-color: var(--deepdoc-night-rule);
}

.diagnosis-sequence {
  display: grid;
  margin-top: 36px;
  margin-bottom: 36px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: var(--deepdoc-rule-width) solid var(--color-border);
  border-bottom: var(--deepdoc-rule-width) solid var(--color-border);
}

.diagnosis-sequence div {
  display: flex;
  min-height: 132px;
  flex-direction: column;
  padding: 18px 14px;
}

.diagnosis-sequence div + div {
  border-left: var(--deepdoc-rule-width) solid var(--color-border);
}

.diagnosis-sequence span {
  margin-bottom: auto;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 10px;
}

.diagnosis-sequence strong {
  font-size: 14px;
}

.diagnosis-sequence small {
  margin-top: 4px;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 9px;
  line-height: 1.5;
}

@media (max-width: 960px) {
  .deepdoc-hero__grid {
    grid-template-columns: 1fr;
  }

  .deepdoc-hero__note {
    max-width: 680px;
  }

  .deepdoc-index {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .deepdoc-index span:nth-child(5) {
    border-left: 0;
  }

  .deepdoc-index span:nth-child(n + 5) {
    border-top: var(--deepdoc-rule-width) solid var(--color-border);
  }

  .diagnosis-sequence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .diagnosis-sequence div:nth-child(4) {
    border-left: 0;
  }

  .diagnosis-sequence div:nth-child(n + 4) {
    border-top: var(--deepdoc-rule-width) solid var(--color-border);
  }
}

@media (max-width: 640px) {
  .deepdoc-hero {
    padding-top: 54px;
    padding-bottom: 48px;
  }

  .deepdoc-hero__summary {
    font-size: 18px;
  }

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

  .deepdoc-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .deepdoc-index span:nth-child(odd) {
    border-left: 0;
  }

  .deepdoc-index span:nth-child(n + 3) {
    border-top: var(--deepdoc-rule-width) solid var(--color-border);
  }

  .deepdoc-index span:nth-child(5) {
    border-left: 0;
  }

  .doc-chapter__head {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .doc-chapter__number {
    padding-top: 6px;
  }

  .doc-chapter .serif-lead {
    margin-bottom: 32px;
    padding-bottom: 26px;
  }

  .diagnosis-sequence {
    grid-template-columns: 1fr;
  }

  .diagnosis-sequence div {
    min-height: 108px;
  }

  .diagnosis-sequence div + div {
    border-top: var(--deepdoc-rule-width) solid var(--color-border);
    border-left: 0;
  }
}