:root { --paper: #f4f4f4; --surface: #fff; --ink: #111; --ink60: #666; --rule: #d9d9d9; }
@media (prefers-color-scheme: dark) { :root { --paper: #000; --surface: #1c1c1e; --ink: #f2f2f2; --ink60: #a3a3a3; --rule: #3a3a3a; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 18px/1.55 "Helvetica Neue", Helvetica, system-ui, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 32px 20px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
header img { width: 56px; height: 56px; border-radius: 13px; border: 2px solid var(--rule); }
header a { color: inherit; text-decoration: none; font-weight: 700; font-size: 26px; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: 3px; }
.meta { color: var(--ink60); font-size: 15px; }
.card { background: var(--surface); border: 2px solid var(--rule); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
nav { display: flex; gap: 20px; margin-top: 40px; padding-top: 16px; border-top: 2px solid var(--rule); font-size: 16px; }