:root { --fg:#1b1b1f; --muted:#5f5f6b; --accent:#5b4bdb; --bg:#ffffff; --card:#f5f4fb; --line:#e3e2ec; }
@media (prefers-color-scheme: dark) {
  :root { --fg:#ececf1; --muted:#a3a3b0; --accent:#a99dff; --bg:#121216; --card:#1d1d24; --line:#2c2c36; }
}
* { box-sizing: border-box; }
body { margin:0; font:16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color:var(--fg); background:var(--bg); }
header { display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; max-width:780px; margin:0 auto; padding:20px 20px 0; }
header a.brand { font-weight:700; font-size:20px; color:var(--fg); text-decoration:none; }
nav a { color:var(--muted); text-decoration:none; margin-left:16px; font-size:14px; }
nav a:hover { color:var(--accent); }
main { max-width:780px; margin:0 auto; padding:24px 20px 56px; }
a { color:var(--accent); }
h1 { font-size:30px; line-height:1.25; margin:8px 0 4px; }
h2 { font-size:20px; margin-top:36px; }
h3 { font-size:16px; margin-top:24px; }
.meta { color:var(--muted); font-size:14px; }
.card { background:var(--card); border-radius:14px; padding:16px 20px; margin:20px 0; }
table { border-collapse:collapse; width:100%; font-size:14px; }
th, td { text-align:left; vertical-align:top; padding:8px 10px; border-bottom:1px solid var(--line); }
footer { color:var(--muted); font-size:13px; text-align:center; padding:24px; border-top:1px solid var(--line); }
footer a { color:var(--muted); margin:0 8px; }
.hero { text-align:center; padding:48px 0 16px; }
.hero h1 { font-size:40px; }
.hero p { color:var(--muted); font-size:18px; }
.features { display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:14px; margin-top:28px; }
.features .card { margin:0; }