:root { --bg: #f4f7fb; --card: #ffffff; --ink: #1e1f2b; --muted: #5b6070; --accent: #1f7fbf; --line: #dde3ec; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #14161f; --card: #1e2130; --ink: #eef0f6; --muted: #a3a9bb; --accent: #5bb8ec; --line: #2e3245; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 48px; }
header { text-align: center; margin-bottom: 24px; }
header img { border-radius: 18px; border: 3px solid var(--ink); }
h1 { margin: 8px 0 4px; font-size: 32px; }
a { color: var(--accent); }
section { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; margin-bottom: 24px; }
h2 { margin-top: 0; }
h3 { margin: 22px 0 6px; font-size: 18px; }
.meta { color: var(--muted); font-size: 14px; margin-top: -8px; }
code { font-size: 14px; overflow-wrap: anywhere; }
footer { text-align: center; color: var(--muted); font-size: 14px; }