:root { --bg: #fbfaf7; --fg: #1d1c1a; --muted: #5d5a54; --rule: #e4e0d8; --link: #2f4fb0; }
@media (prefers-color-scheme: dark) { :root { --bg: #151413; --fg: #ecebe7; --muted: #a8a49c; --rule: #2e2c29; --link: #9db3f5; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 56px 20px 80px; }
header { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 48px; }
header a.brand { font-weight: 700; letter-spacing: -0.01em; color: var(--fg); text-decoration: none; font-size: 19px; }
nav a { color: var(--muted); margin-left: 16px; font-size: 15px; }
h1 { font-size: 38px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 20px; }
h2 { font-size: 21px; margin: 40px 0 8px; }
p, li { color: var(--fg); }
.lede { font-size: 20px; color: var(--muted); }
a { color: var(--link); }
.box { border: 1px solid var(--rule); border-radius: 10px; padding: 18px 20px; margin: 24px 0; }
footer { margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--rule); color: var(--muted); font-size: 14px; }
small { color: var(--muted); }