:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #5b6474;
  --line: #d8deea;
  --brand: #2563eb;
  --brand-soft: rgba(37, 99, 235, 0.08);
  --warn-soft: rgba(245, 158, 11, 0.12);
  --ok-soft: rgba(16, 185, 129, 0.12);
  --shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --card: #121a2e;
    --text: #e5ecf7;
    --muted: #a9b4c8;
    --line: #29334c;
    --brand: #7aa2ff;
    --brand-soft: rgba(122, 162, 255, 0.12);
    --warn-soft: rgba(245, 158, 11, 0.16);
    --ok-soft: rgba(16, 185, 129, 0.18);
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, color-mix(in srgb, var(--bg) 92%, #ffffff 8%) 100%);
  color: var(--text);
  line-height: 1.7;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1040px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  padding: 40px 0 28px;
  background:
    radial-gradient(circle at top right, rgba(37,99,235,0.18), transparent 34%),
    radial-gradient(circle at top left, rgba(16,185,129,0.12), transparent 28%);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.hero-card {
  margin-top: 16px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: color-mix(in srgb, var(--card) 96%, transparent 4%);
  box-shadow: var(--shadow);
}
.hero-card h1 { margin: 0 0 12px; font-size: clamp(30px, 4vw, 46px); line-height: 1.08; }
.hero-card p { margin: 0; color: var(--muted); font-size: 18px; max-width: 760px; }
.actions, .pill-row { display: flex; flex-wrap: wrap; gap: 12px; }
.actions { margin-top: 22px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}
.btn.primary { background: var(--brand); color: white; border-color: transparent; }
.btn:hover { text-decoration: none; filter: brightness(1.02); }
.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent 18%);
  border-bottom: 1px solid var(--line);
}
.site-nav .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
.nav-links a { color: var(--muted); font-weight: 600; }
.nav-links a.active { color: var(--text); }
.main-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
  padding: 28px 0 56px;
}
.card {
  grid-column: span 12;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--card);
  box-shadow: var(--shadow);
}
@media (min-width: 860px) {
  .card.span-6 { grid-column: span 6; }
  .card.span-4 { grid-column: span 4; }
  .card.span-8 { grid-column: span 8; }
}
.card h2, .card h3 { margin-top: 0; }
.card p:last-child, .card ul:last-child, .card ol:last-child { margin-bottom: 0; }
.list-tight { margin: 0; padding-left: 20px; }
.list-tight li + li { margin-top: 8px; }
.muted { color: var(--muted); }
.notice {
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid var(--line);
}
.notice.info { background: var(--brand-soft); }
.notice.warn { background: var(--warn-soft); }
.notice.ok { background: var(--ok-soft); }
.kicker { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-weight: 700; }
.language-links { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-top: 16px; }
.language-card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--card) 96%, transparent 4%);
}
.language-card h3 { margin-bottom: 6px; }
.footer {
  padding: 22px 0 44px;
  color: var(--muted);
}
.small { font-size: 14px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 14px; color: var(--muted); font-weight: 700; }
.code {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--brand-soft) 76%, var(--card) 24%);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.94em;
}
.anchor-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}
.anchor-links a {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
}
.lang-section + .lang-section { margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--line); }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}
.hr { height: 1px; background: var(--line); margin: 20px 0; }