:root { color-scheme: dark; }
* { box-sizing: border-box; }
body { margin: 0; background: #05070f; color: #e9ecf8; font: 16px/1.65 'Geist Variable', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif; -webkit-font-smoothing: antialiased; }
body::before { content: ''; position: fixed; inset: 0; z-index: -1; background: radial-gradient(600px 420px at 10% -10%, rgba(75, 91, 255, 0.28), transparent 70%), radial-gradient(520px 420px at 100% 30%, rgba(18, 168, 138, 0.16), transparent 70%); }
header { width: min(780px, calc(100% - 40px)); margin: 0 auto; padding: 28px 0 8px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
header a { color: inherit; text-decoration: none; display: flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.02em; font-size: 17px; }
header nav a { font-weight: 500; font-size: 14px; color: rgba(228, 233, 255, 0.62); }
main { width: min(780px, calc(100% - 40px)); margin: 0 auto; padding: 24px 0 80px; }
h1 { font-size: clamp(30px, 5vw, 42px); letter-spacing: -0.035em; line-height: 1.1; margin: 16px 0 6px; }
.updated { color: rgba(228, 233, 255, 0.55); font-size: 14px; margin: 0 0 32px; }
h2 { font-size: 20px; letter-spacing: -0.02em; margin: 36px 0 10px; }
p, li { color: rgba(228, 233, 255, 0.82); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
a { color: #a9b5ff; }
strong { color: #fff; font-weight: 600; }
.card { padding: 18px 20px; border-radius: 18px; border: 1px solid rgba(255, 255, 255, 0.1); background: rgba(255, 255, 255, 0.05); }
.card p { margin: 4px 0; }
mark.todo { background: rgba(255, 200, 87, 0.18); color: #ffd98a; padding: 1px 6px; border-radius: 6px; }
footer { width: min(780px, calc(100% - 40px)); margin: 0 auto; padding: 24px 0 40px; border-top: 1px solid rgba(255, 255, 255, 0.1); display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; }
footer a { color: rgba(228, 233, 255, 0.62); text-decoration: none; }
footer a:hover { color: #fff; }