:root { --bg: #F2F2F7; --card: #FFFFFF; --text: #1C1C1E; --muted: #5A5A5F; --accent: #0058CC; }
@media (prefers-color-scheme: dark) { :root { --bg: #000000; --card: #1C1C1E; --text: #F2F2F7; --muted: #AEAEB2; --accent: #64A8FF; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 40px; line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.5px; }
h2 { font-size: 22px; margin: 32px 0 8px; }
p, li { color: var(--muted); }
.card { background: var(--card); border-radius: 14px; padding: 20px 22px; margin: 20px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; margin-bottom: 32px; color: var(--text); text-decoration: none; }
.brand span { width: 36px; height: 36px; border-radius: 9px; background: var(--accent); display: inline-block; }
a { color: var(--accent); }
footer { margin-top: 48px; font-size: 14px; color: var(--muted); }