:root {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --brand: #2563eb;
  --soft: #f1f5f9;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--brand); }
.top, main, footer { max-width: 760px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.top { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; padding-top: 18px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.brand img { border-radius: 8px; }
.lang { display: flex; gap: 6px; font-size: 14px; }
.lang a, .lang span { padding: 4px 10px; border-radius: 8px; text-decoration: none; }
.lang a { color: var(--muted); }
.lang a:hover { background: var(--soft); }
.lang span { background: var(--brand); color: #fff; font-weight: 600; }
main { padding-top: 32px; padding-bottom: 48px; }
.hero { text-align: center; padding: 24px 0 8px; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 12px; }
.lead { font-size: 19px; color: var(--muted); margin: 0 auto 20px; max-width: 560px; }
.badge { display: inline-block; background: var(--soft); border-radius: 999px; padding: 6px 16px; font-size: 14px; color: var(--muted); margin: 0; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin: 40px 0; }
.feature { background: var(--soft); border-radius: 14px; padding: 18px; }
.feature h3 { margin: 0 0 6px; font-size: 17px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }
.contact { text-align: center; }
h2 { font-size: 21px; margin: 32px 0 8px; }
.doc h2 { border-top: 1px solid var(--line); padding-top: 24px; }
.doc h2:first-of-type { border-top: 0; padding-top: 0; }
.updated { color: var(--muted); font-size: 14px; margin-top: 0; }
li { margin: 4px 0; }
footer { border-top: 1px solid var(--line); padding-top: 20px; padding-bottom: 36px; color: var(--muted); font-size: 14px; }
.links { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 8px; }
@media (max-width: 480px) { h1 { font-size: 26px; } }