:root { color-scheme: light dark; --bg: #f6f7fb; --fg: #16181d; --muted: #5b6070; --card: #ffffff; --line: #e3e5ec; --accent: #2f7fd1; }
@media (prefers-color-scheme: dark) { :root { --bg: #0b0b12; --fg: #eceef4; --muted: #9aa0b2; --card: #151722; --line: #262a38; --accent: #8fd8ff; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 2.1rem; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.lede { color: var(--muted); font-size: 1.1rem; margin: 0 0 28px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px; margin: 20px 0; }
a { color: var(--accent); }
footer { margin-top: 48px; color: var(--muted); font-size: 0.9rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }