.doc-api {
  background: linear-gradient(180deg, #f5f7fb 0%, #eef2f7 100%);
  min-height: 100vh;
  color: #112132;
}

.doc-api .hero {
  background: radial-gradient(circle at top left, rgba(59,130,246,0.18), transparent 34%),
              linear-gradient(135deg, #0f172a 0%, #162338 55%, #1f4b7a 100%);
  color: #fff;
  padding: 64px 24px 52px;
}

.doc-api .hero-inner,
.doc-api .container {
  max-width: 1240px;
  margin: 0 auto;
}

.doc-api .eyebrow {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.12);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12px;
  margin-bottom: 18px;
}

.doc-api h1 {
  font-size: 40px;
  line-height: 1.08;
  margin: 0 0 18px;
}

.doc-api .hero-text {
  max-width: 940px;
  color: rgba(255,255,255,.88);
  font-size: 18px;
  line-height: 1.7;
}

.doc-api .hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.doc-api .hero-badges span,
.doc-api .meta-badge,
.doc-api .link-card,
.doc-api .module-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
}

.doc-api .hero-badges span {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.14);
  padding: 10px 14px;
  font-size: 13px;
}

.doc-api .container { padding: 28px 24px 56px; }

.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: -34px;
  margin-bottom: 24px;
}

.mini-card,
.card,
.module-card {
  background: #fff;
  border: 1px solid #dbe3ee;
  border-radius: 22px;
  box-shadow: 0 12px 30px rgba(15,23,42,.06);
}

.mini-card { padding: 24px; }
.mini-card h2 { margin: 0 0 8px; font-size: 32px; color: #0f172a; }
.mini-card p { margin: 0; color: #41566f; line-height: 1.6; }

.card { padding: 28px; margin-bottom: 22px; }

.section-header { margin-bottom: 18px; }
.section-header h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-size: 28px;
}
.section-header p { margin: 0; color: #475569; line-height: 1.7; }

.explain-grid,
.dual-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.explain-grid > div {
  background: #f8fbff;
  border: 1px solid #d8e5f3;
  border-radius: 18px;
  padding: 18px;
}

.explain-grid h3 { margin-top: 0; margin-bottom: 10px; }
.explain-grid p { margin: 0; color: #4b5f76; line-height: 1.65; }

.toc ul {
  columns: 2;
  column-gap: 28px;
  padding-left: 18px;
  margin: 0;
}
.toc li { margin-bottom: 12px; }
.toc a { color: #114b8a; text-decoration: none; font-weight: 600; }

.section-block { margin-bottom: 28px; }
.meta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 12px; }
.meta-badge {
  font-size: 13px;
  background: #ecf5ff;
  color: #114b8a;
  border: 1px solid #cae0f8;
  padding: 8px 12px;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.module-card { padding: 20px; }
.module-card h3 {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.5;
  word-break: break-word;
}
.module-card p { margin: 0; color: #4b5f76; line-height: 1.7; }

.plain-list {
  margin: 0;
  padding-left: 18px;
}
.plain-list li { margin-bottom: 10px; color: #314458; }

.matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.module-chip {
  background: #f8fbff;
  border: 1px solid #d8e5f3;
  border-radius: 18px;
  padding: 18px;
  align-items: flex-start;
  justify-content: flex-start;
  line-height: 1.7;
  color: #314458;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.link-card {
  justify-content: center;
  padding: 16px 18px;
  background: #0f172a;
  color: #fff;
  text-decoration: none;
  border-radius: 18px;
  border: 1px solid #0f172a;
}
.link-card:hover { background: #1d3557; }

@media (max-width: 980px) {
  .overview-grid, .module-grid, .matrix, .dual-grid, .link-grid, .explain-grid {
    grid-template-columns: 1fr;
  }
  .toc ul { columns: 1; }
  .doc-api h1 { font-size: 32px; }
}