:root { --bg: #f4f5fb; --text: #1f2135; --muted: #6b6f88; --link: #5847d8; --card: #fff; }
@media (prefers-color-scheme: dark) { :root { --bg: #14151f; --text: #e9eaf4; --muted: #9a9db5; --link: #a197f5; --card: #1d1f2d; } }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; }
main { max-width: 720px; margin: 24px auto; padding: 24px 28px; background: var(--card); border-radius: 18px; }
@media (max-width: 760px) { main { margin: 0; border-radius: 0; padding: 20px 16px; } }
a { color: var(--link); }
h1 { margin: 8px 0 0; }
h2 { margin-top: 28px; font-size: 1.2rem; }
.muted { color: var(--muted); margin-top: 4px; }