:root { color-scheme: light dark; --fg: #1c1c1e; --muted: #6e6e73; --accent: #4f46e5; --bg: #ffffff; --card: #f5f5f7; }
@media (prefers-color-scheme: dark) { :root { --fg: #f5f5f7; --muted: #a1a1a6; --accent: #a5b4fc; --bg: #0b0b0f; --card: #1c1c22; } }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif; color: var(--fg); background: var(--bg); }
main { max-width: 760px; margin: 0 auto; padding: 48px 24px 80px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
h1 { font-size: 40px; margin: 0; letter-spacing: -0.02em; }
h2 { font-size: 24px; margin: 40px 0 12px; }
p.lede { font-size: 21px; color: var(--muted); margin-top: 6px; }
a { color: var(--accent); }
nav a { margin-right: 18px; }
.card { background: var(--card); border-radius: 14px; padding: 20px 24px; margin: 20px 0; }
ul { padding-left: 22px; }
footer { margin-top: 56px; color: var(--muted); font-size: 14px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.92em; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }