:root {
  --bg: #0e1117;
  --surface: #171b24;
  --surface-raised: #1f2530;
  --border: rgba(255, 255, 255, 0.1);
  --text: #f4f6fb;
  --muted: #9aa3b2;
  --primary: #4ade57;
  --primary-ink: #0e1117;
  --radius: 16px;
  --max: 1080px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { border-bottom: 1px solid var(--border); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; font-size: 20px; }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; }
.nav { display: flex; gap: 20px; font-size: 15px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero { padding-top: 88px; padding-bottom: 64px; text-align: center; }
.hero img { width: 96px; height: 96px; }
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.1; letter-spacing: -0.02em; margin: 24px 0 16px; }
.hero p { color: var(--muted); font-size: 19px; max-width: 620px; margin: 0 auto; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 32px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 52px; padding: 0 24px; border-radius: 14px; font-weight: 700;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: var(--primary-ink); }
.btn-ghost { border: 1px solid var(--border); color: var(--muted); cursor: default; }
.hero .note { color: var(--muted); font-size: 14px; margin-top: 14px; }

/* Features */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; padding-top: 24px; padding-bottom: 80px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }
.card .icon { font-size: 28px; margin-bottom: 12px; }

/* Documents */
.doc { max-width: 760px; padding: 56px 20px 80px; margin: 0 auto; }
.doc h1 { font-size: 36px; line-height: 1.15; margin: 0 0 8px; }
.doc .updated { color: var(--muted); margin: 0 0 32px; }
.doc h2 { font-size: 22px; margin: 40px 0 12px; }
.doc h3 { font-size: 17px; margin: 24px 0 8px; }
.doc p, .doc li { color: #d5d9e2; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 15px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.doc th { color: var(--muted); font-weight: 600; }
.callout { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; margin: 24px 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; padding-top: 28px; padding-bottom: 28px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 16px; }
.site-footer a { color: var(--muted); }

@media (max-width: 560px) {
  .nav { gap: 14px; font-size: 14px; }
  .nav-support { display: none; }
  .hero { padding-top: 56px; }
  .hero p { font-size: 17px; }
  .doc { padding-top: 36px; }
  .doc table, .doc thead, .doc tbody, .doc tr, .doc th, .doc td { display: block; }
  .doc thead { display: none; }
  .doc td { border: 0; padding: 4px 0; }
  .doc tr { border-bottom: 1px solid var(--border); padding: 10px 0; }
}