:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --line: #dce2ea;
  --text: #101828;
  --muted: #4b5563;
  --brand: #0a4da6;
  --brand-soft: #e6eefb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  line-height: 1.6;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, #0a4da6 0%, #0b63c5 60%, #1276df 100%);
  color: #fff;
}

.header-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.site-header h1 {
  margin: 0;
  font-size: 1.5rem;
}

.site-header p {
  margin: 0.35rem 0 0;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.9);
}

.app-link {
  background: #fff;
  color: var(--brand);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  padding: 0.55rem 1rem;
  white-space: nowrap;
}

.layout {
  max-width: 1280px;
  margin: 1rem auto;
  padding: 0 1rem 1.5rem;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1rem;
}

.sidebar,
.main-content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.sidebar {
  padding: 0.8rem;
  position: sticky;
  top: 1rem;
  align-self: start;
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

.search-label {
  font-size: 0.8rem;
  color: var(--muted);
  display: block;
  margin-bottom: 0.35rem;
}

#doc-search {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
  margin-bottom: 0.85rem;
}

.nav-group {
  margin-bottom: 0.75rem;
}

.nav-group-title {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0.2rem 0 0.35rem;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list li {
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: block;
  text-decoration: none;
  color: var(--text);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
  font-size: 0.92rem;
}

.nav-list a:hover {
  background: #f2f5fb;
}

.nav-list a.active {
  background: var(--brand-soft);
  color: var(--brand);
  font-weight: 600;
}

.main-content {
  padding: 1.25rem 1.4rem;
}

.doc-meta {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.doc-content h1,
.doc-content h2,
.doc-content h3 {
  line-height: 1.25;
}

.doc-content h1 {
  margin-top: 0;
}

.doc-content h2 {
  margin-top: 1.6rem;
  border-top: 1px solid #edf1f6;
  padding-top: 1rem;
}

.doc-content pre,
.doc-content code {
  font-family: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.doc-content pre {
  background: #0f172a;
  color: #e5e7eb;
  border-radius: 10px;
  padding: 0.9rem;
  overflow: auto;
}

.doc-content :not(pre) > code {
  background: #eff2f7;
  border-radius: 6px;
  padding: 0.1rem 0.35rem;
}

.doc-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.doc-content th,
.doc-content td {
  border: 1px solid var(--line);
  padding: 0.55rem;
  text-align: left;
  vertical-align: top;
}

.doc-content blockquote {
  border-left: 3px solid var(--brand);
  margin: 1rem 0;
  padding: 0.1rem 0.8rem;
  color: #334155;
  background: #f7f9fd;
}

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

  .sidebar {
    position: static;
    max-height: none;
  }
}