:root {
  --bg: #fbfaf7;
  --ink: #16181d;
  --muted: #5b6070;
  --line: #e4e1da;
  --accent: #b4532a;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121316;
    --ink: #ecebe7;
    --muted: #a3a6b0;
    --line: #2a2c32;
    --accent: #e0855a;
    --card: #1a1b1f;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px; }
header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 700; letter-spacing: 0.02em; font-size: 20px; color: var(--ink); text-decoration: none; }
.logo span { color: var(--accent); }
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 15px; }
nav a:hover { color: var(--ink); }
.hero { padding: 72px 0 48px; }
.hero h1 { font-size: clamp(32px, 6vw, 48px); line-height: 1.12; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0; }
.btn {
  display: inline-block; margin-top: 28px; padding: 12px 20px; border-radius: 8px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 600;
}
section { padding: 40px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 24px; margin: 0 0 16px; letter-spacing: -0.01em; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px; }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.doc { padding: 48px 0 64px; }
.doc h1 { font-size: 34px; margin: 0 0 4px; letter-spacing: -0.02em; }
.doc .updated { color: var(--muted); margin: 0 0 32px; font-size: 15px; }
.doc h2 { font-size: 21px; margin: 36px 0 10px; }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
a { color: var(--accent); }
footer.site { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
footer.site a { color: var(--muted); }