:root {
  --bg: #ffffff;
  --fg: #1d1f23;
  --muted: #5b616b;
  --line: #e4e6ea;
  --accent: #1a6b4f;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14161a; --fg: #e8eaed; --muted: #9aa0a8; --line: #2a2e35; --accent: #4fc79b; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; padding-top: 16px; padding-bottom: 16px; }
.logo { font-weight: 700; }
nav a { margin-left: 16px; color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--fg); }
a { color: var(--accent); }
.hero { padding: 48px 0 16px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 1.3rem; margin: 40px 0 8px; }
h3 { font-size: 1.05rem; margin: 24px 0 4px; }
p, li { color: var(--fg); }
.btn { display: inline-block; padding: 10px 18px; border-radius: 6px; background: var(--accent); color: var(--bg); text-decoration: none; font-weight: 600; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 20px; }
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; }
@media (max-width: 520px) { dl { grid-template-columns: 1fr; } dd { margin-bottom: 8px; } }
footer { margin-top: 64px; border-top: 1px solid var(--line); padding: 20px 0; color: var(--muted); font-size: 0.85rem; }