:root { --bg: #ffffff; --text: #1c1c1e; --muted: #6e6e73; --card: #f2f2f7; --accent: #0a84ff; }
@media (prefers-color-scheme: dark) { :root { --bg: #000000; --text: #f2f2f7; --muted: #a1a1a6; --card: #1c1c1e; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
h1 { font-size: 28px; margin: 0; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
.card { background: var(--card); border-radius: 14px; padding: 16px 18px; margin: 12px 0; }
a { color: var(--accent); }
nav { margin: 12px 0 24px; display: flex; gap: 16px; }
ol, ul { padding-left: 22px; }
.btn { display: inline-block; margin: 8px 8px 6px 0; padding: 10px 18px; border-radius: 12px; background: var(--accent); color: #fff; font-weight: 600; text-decoration: none; }
footer { margin-top: 48px; font-size: 14px; color: var(--muted); }