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

.doc-masthead {
  padding-top: clamp(54px, 8vw, 96px);
  padding-bottom: clamp(34px, 6vw, 72px);
  border-bottom: var(--stroke-heavy) double var(--ink-line);
  background:
    linear-gradient(90deg, var(--ink-dust) var(--stroke-thin), var(--transparent) var(--stroke-thin)),
    linear-gradient(var(--transparent), var(--blue-wash)),
    var(--paper);
  background-size: 24px 100%, auto, auto;
}

.doc-masthead h1 {
  max-width: 780px;
  color: var(--brand-red);
}

.doc-lead {
  max-width: 760px;
  color: var(--text-soft);
  font-size: clamp(1.02rem, 2vw, 1.2rem);
}

.doc-fact-strip {
  max-width: 100%;
  margin: 28px 0;
  padding: 12px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-top: var(--stroke-medium) solid var(--ink-line);
  border-bottom: var(--stroke-medium) solid var(--ink-line);
}

.doc-fact-strip span {
  max-width: 100%;
  padding: 5px 9px;
  overflow: hidden;
  border: var(--stroke-thin) solid var(--ink-line);
  color: var(--brand-red-deep);
  background: var(--paper-bright);
  font-family: var(--font-mono);
  font-size: 0.69rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.deepdoc-article {
  padding-top: clamp(32px, 6vw, 72px);
  padding-bottom: var(--section-space);
}

.doc-chapter {
  min-width: 0;
  padding-top: 40px;
  padding-bottom: 54px;
  border-bottom: var(--stroke-heavy) double var(--ink-line);
}

.doc-chapter:first-child {
  padding-top: 0;
}

.doc-chapter:last-child {
  border-bottom: 0;
}

.chapter-index {
  width: max-content;
  max-width: 100%;
  margin-bottom: 14px;
  padding: 5px 10px;
  overflow: hidden;
  border: var(--stroke-thin) solid var(--ink-line);
  color: var(--paper-bright);
  background: var(--brand-red);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.doc-chapter h2 {
  scroll-margin-top: calc(var(--header-size) + 18px);
}

.doc-chapter h3 {
  color: var(--brand-red-deep);
}

.doc-chapter pre {
  margin-top: 22px;
  margin-bottom: 26px;
}

.doc-chapter .table-wrap {
  margin-top: 26px;
  margin-bottom: 30px;
}

.doc-chapter .step-list {
  margin-top: 28px;
  margin-bottom: 34px;
}

.doc-chapter .step-list h3 {
  margin-top: 0;
}

@media (max-width: 640px) {
  .doc-masthead {
    padding-top: 42px;
    padding-bottom: 30px;
  }

  .doc-fact-strip {
    gap: 6px;
  }

  .doc-fact-strip span {
    font-size: 0.62rem;
  }

  .doc-chapter {
    padding-top: 32px;
    padding-bottom: 42px;
  }
}