:root { --bg: #f5f5f7; --card: #ffffff; --text: rgba(0,0,0,.85); --muted: rgba(0,0,0,.55); --line: rgba(0,0,0,.1); --accent: #0088ff; }
@media (prefers-color-scheme: dark) { :root { --bg: #141416; --card: #1f1f22; --text: rgba(255,255,255,.88); --muted: rgba(255,255,255,.55); --line: rgba(255,255,255,.12); --accent: #3b9cff; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 56px 20px 80px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 32px; }
header img { width: 56px; height: 56px; }
h1 { font-size: 28px; line-height: 1.2; margin: 0; }
h2 { font-size: 17px; margin: 32px 0 8px; }
p, li { color: var(--text); }
.sub { color: var(--muted); margin: 2px 0 0; font-size: 15px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { padding-left: 20px; }
footer { margin-top: 40px; color: var(--muted); font-size: 14px; }