:root { --bg: #fbfbfa; --fg: #1d1d1b; --muted: #5d5d58; --link: #1a5fb4; --rule: #e2e2dd; }
@media (prefers-color-scheme: dark) { :root { --bg: #161615; --fg: #ececea; --muted: #a3a39d; --link: #8ab4f8; --rule: #33332f; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 42rem; margin: 0 auto; padding: 3rem 16px; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 .5rem; }
a { color: var(--link); }
footer, .muted { color: var(--muted); font-size: .9rem; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); }
input, button { font: inherit; padding: .35rem .6rem; }