:root { --ink: #0f172a; --text: #334155; --muted: #64748b; --line: #e2e8f0; --primary: #4f46e5; }
* { box-sizing: border-box; }
body { margin: 0; font-family: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; color: var(--text); background: #f8fafc; line-height: 1.65; }
header { background: #fff; border-bottom: 1px solid var(--line); }
header .in, main, footer .in { max-width: 820px; margin: 0 auto; padding: 0 20px; }
header .in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
header a { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 18px; }
header a b { color: var(--primary); }
header nav a { font-weight: 500; font-size: 15px; color: var(--text); margin-left: 18px; }
main { background: #fff; margin: 32px auto; border: 1px solid var(--line); border-radius: 16px; padding: 36px 40px; }
h1 { color: var(--ink); font-size: 32px; margin: 0 0 4px; letter-spacing: -.02em; }
h2 { color: var(--ink); font-size: 20px; margin: 30px 0 8px; }
.muted { color: var(--muted); font-size: 14px; }
a { color: var(--primary); }
li { margin: 4px 0; }
table { border-collapse: collapse; width: 100%; margin: 10px 0; font-size: 15px; }
th, td { text-align: left; border: 1px solid var(--line); padding: 8px 10px; }
th { background: #f8fafc; }
footer { color: var(--muted); font-size: 13px; padding: 10px 0 40px; text-align: center; }
@media (max-width: 640px) { main { padding: 24px 18px; margin: 16px; } h1 { font-size: 26px; } }