:root { --bg: #fff; --fg: #111; --muted: #6b6b70; --line: #e5e5ea; --card: #f5f5f7; --link: #0a66d8; color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #000; --fg: #f5f5f7; --muted: #98989f; --line: #2c2c2e; --card: #1c1c1e; --link: #4aa3ff; } .logo { filter: invert(1); } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 56px 20px 80px; }
header { text-align: center; margin-bottom: 40px; }
.logo { width: 88px; height: 88px; }
h1 { font-size: 2.1rem; line-height: 1.15; margin: 12px 0 6px; letter-spacing: -0.02em; }
h2 { font-size: 1.25rem; margin: 40px 0 8px; }
.lead { color: var(--muted); font-size: 1.1rem; margin: 0; }
a { color: var(--link); text-decoration: none; } a:hover { text-decoration: underline; }
ul.features { list-style: none; padding: 0; margin: 0; background: var(--card); border-radius: 16px; }
ul.features li { padding: 14px 18px; border-top: 1px solid var(--line); } ul.features li:first-child { border-top: 0; }
.card { background: var(--card); border-radius: 16px; padding: 18px; }
dt { font-weight: 600; margin-top: 16px; } dd { margin: 4px 0 0; color: var(--muted); }
footer { margin-top: 56px; color: var(--muted); font-size: 0.9rem; text-align: center; }
footer a { margin: 0 8px; }