:root {
  --bg: #f2f2f7; --card: #ffffff; --text: #1c1c1e; --dim: #6c6c70; --accent: #0a7aff; --line: #e5e5ea;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #000000; --card: #1c1c1e; --text: #f2f2f7; --dim: #98989f; --accent: #0a84ff; --line: #38383a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
       -webkit-font-smoothing: antialiased; }
.wrap { max-width: 720px; margin: 0 auto; padding: 40px 20px 80px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
header img { width: 40px; height: 40px; }
header a { color: var(--text); text-decoration: none; font-weight: 600; font-size: 20px; }
nav { margin-left: auto; font-size: 15px; display: flex; gap: 16px; flex-wrap: wrap; }
nav a { color: var(--accent); text-decoration: none; }
h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 8px 0 12px; }
h2 { font-size: 21px; margin: 36px 0 8px; }
p, li { color: var(--dim); }
strong { color: var(--text); }
a { color: var(--accent); }
.card { background: var(--card); border-radius: 16px; padding: 20px 22px; margin: 18px 0; }
.card p:first-child { margin-top: 0; } .card p:last-child { margin-bottom: 0; }
.updated { font-size: 14px; color: var(--dim); }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }
footer { font-size: 14px; color: var(--dim); margin-top: 48px; }
.hero { text-align: center; padding: 24px 0 8px; }
.hero img { width: 112px; height: 112px; }