:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --panel: #ffffff;
  --text: #18202a;
  --muted: #667085;
  --line: #d9dee7;
  --code-bg: #101828;
  --code-text: #edf2f7;
  --accent: #d95f2b;
  --accent-strong: #a9471f;
  --link: #1463a5;
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(16px, 4vw, 40px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
}

.top-nav {
  display: flex;
  gap: 18px;
  font-size: 0.95rem;
}

.top-nav a {
  color: var(--muted);
  text-decoration: none;
}

.top-nav a:hover {
  color: var(--text);
}

.shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 32px;
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 32px clamp(16px, 4vw, 40px) 56px;
}

.sidebar {
  position: sticky;
  top: 76px;
  align-self: start;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.sidebar nav {
  display: grid;
  gap: 6px;
}

.sidebar a {
  display: block;
  padding: 6px 8px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
}

.sidebar .home-link {
  margin-bottom: 10px;
  font-weight: 700;
}

.sidebar a:hover {
  background: #eef3f8;
}

.nav-heading {
  margin: 14px 8px 2px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-heading:first-child {
  margin-top: 0;
}

.content {
  min-width: 0;
  max-width: 820px;
}

.content h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
}

.content h2 {
  margin: 44px 0 12px;
  padding-top: 4px;
  font-size: 1.65rem;
  line-height: 1.2;
}

.content h3 {
  margin: 28px 0 8px;
  font-size: 1.18rem;
}

.lede {
  color: var(--muted);
  font-size: 1.15rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 28px 0;
}

.doc-card {
  display: block;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
}

.doc-card:hover {
  border-color: #aab4c4;
}

.doc-card strong {
  display: block;
  margin-bottom: 4px;
}

.doc-card span {
  color: var(--muted);
}

.section-list {
  display: grid;
  gap: 10px;
  padding-left: 0;
  list-style: none;
}

.section-list li {
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.section-list strong {
  display: block;
}

code {
  padding: 0.12rem 0.28rem;
  background: #eef1f5;
  border-radius: 4px;
  color: #111827;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

pre {
  overflow-x: auto;
  padding: 18px;
  background: var(--code-bg);
  border-radius: 8px;
}

pre[class*="language-"] {
  border: 1px solid #273449;
}

pre code {
  padding: 0;
  background: transparent;
  color: var(--code-text);
  font-size: 0.9rem;
}

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: #8da2bd;
}

.token.punctuation {
  color: #cbd5e1;
}

.token.keyword,
.token.operator {
  color: #7dd3fc;
}

.token.function,
.token.class-name {
  color: #fbbf24;
}

.token.string,
.token.char {
  color: #86efac;
}

.token.number,
.token.boolean,
.token.constant,
.token.builtin {
  color: #fca5a5;
}

.token.decorator,
.token.annotation,
.token.property,
.token.attr-name {
  color: #c4b5fd;
}

.token.variable,
.token.parameter {
  color: #e5e7eb;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: var(--panel);
  border: 1px solid var(--line);
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #eef1f5;
  font-weight: 700;
}

.note {
  padding: 14px 16px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  color: #7c2d12;
}

.page-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-nav-link {
  display: grid;
  gap: 2px;
  min-width: 0;
  padding: 14px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
}

.page-nav-link:hover {
  border-color: #aab4c4;
}

.page-nav-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-nav-title {
  overflow-wrap: anywhere;
  font-weight: 700;
}

.page-nav-next {
  text-align: right;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px clamp(16px, 4vw, 40px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 840px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .page-nav {
    grid-template-columns: 1fr;
  }

  .page-nav-next {
    text-align: left;
  }
}

@media (max-width: 560px) {
  .site-header,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}