:root { --bg: #f5f6f8; --surface: #fff; --text: #111418; --muted: #62697a; --primary: #2a63d6; --border: #e2e5e9; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1114; --surface: #181b20; --text: #eef0f3; --muted: #9aa2b1; --primary: #6c9bff; --border: #2a2f37; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 24px; flex-wrap: wrap; }
header a.brand { font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; }
nav a { color: var(--muted); margin-left: 12px; text-decoration: none; font-size: 14px; }
a { color: var(--primary); }
h1 { font-size: 28px; line-height: 1.25; margin: 0 0 4px; }
h2 { font-size: 19px; margin: 28px 0 8px; }
.muted { color: var(--muted); font-size: 14px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; margin: 16px 0; }
.hero { text-align: center; padding: 48px 0 24px; }
.hero h1 { font-size: 40px; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.features .card { margin: 0; }
footer { margin-top: 48px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); margin-right: 12px; }
.todo { background: #fff3cd; color: #664d03; padding: 0 4px; border-radius: 4px; }
.card h2 { margin-top: 0; }
header a.brand { display: inline-flex; align-items: center; gap: 8px; }
header a.brand img { border-radius: 7px; }