:root {
  --bg: #0a0a0a;
  --surface: #111112;
  --card: #141415;
  --border: #242426;
  --border-strong: #38383b;
  --text: #ededed;
  --text-2: #a1a1a6;
  --muted: #6b6b70;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--text); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }

header.site {
  border-bottom: 1px solid var(--border);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
header.site img { height: 30px; display: block; }
header.site nav a {
  color: var(--text-2); text-decoration: none; margin-left: 24px; font-size: 14px;
}
header.site nav a:hover { color: var(--text); }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: 6px; font-weight: 600; font-size: 14px;
  text-decoration: none; border: 1px solid var(--border-strong);
}
.btn.primary { background: #f2f2f2; color: #0a0a0a; border-color: #f2f2f2; }
.btn.primary:hover { background: #dcdcdc; }
.btn.secondary { background: #1e1e20; color: var(--text); }
.btn.secondary:hover { background: #262628; }

.hero { padding: 96px 0 72px; }
.hero h1 { font-size: 48px; line-height: 1.1; margin: 0 0 18px; letter-spacing: -0.02em; max-width: 720px; }
.hero p { color: var(--text-2); font-size: 18px; max-width: 620px; margin: 0 0 32px; }
.hero .actions .btn { margin-right: 10px; }
.hero .note { color: var(--muted); font-size: 13px; margin-top: 16px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 24px;
}
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--text-2); font-size: 14px; }

section { padding: 40px 0; }
section h2 { font-size: 24px; margin: 0 0 20px; }

.doc { max-width: 760px; padding: 56px 0 80px; }
.doc h1 { font-size: 34px; margin: 0 0 6px; }
.doc .updated { color: var(--muted); font-size: 14px; margin-bottom: 36px; }
.doc h2 { font-size: 19px; margin: 36px 0 10px; }
.doc p, .doc li { color: var(--text-2); }
.doc strong { color: var(--text); }

footer.site { border-top: 1px solid var(--border); margin-top: 48px; }
footer.site .wrap {
  display: flex; justify-content: space-between; padding: 28px 24px; color: var(--muted); font-size: 13px;
}
footer.site a { color: var(--muted); text-decoration: none; margin-left: 20px; }
footer.site a:hover { color: var(--text); }

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  header.site nav a { margin-left: 14px; }
}