:root {
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #5a6470;
  --line: #e3e7ec;
  --brand: #0d3b66;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
}
.wrap { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
header { display: flex; align-items: center; gap: 14px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
header img { width: 48px; height: 48px; border-radius: 11px; }
header .name { font-size: 20px; font-weight: 650; letter-spacing: -0.01em; }
header .tag { color: var(--muted); font-size: 14px; }
h1 { font-size: 28px; letter-spacing: -0.02em; margin: 32px 0 8px; }
h2 { font-size: 18px; margin: 32px 0 8px; }
h3 { font-size: 16px; margin: 22px 0 6px; }
p, li { color: #2b3138; }
a { color: var(--brand); }
code { background: rgba(13,59,102,.07); padding: 1px 5px; border-radius: 4px; font-size: 14px; word-break: break-all; }
.lead { font-size: 17px; color: var(--muted); margin-top: 0; }
.box { border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin: 20px 0; }
.box p:last-child { margin-bottom: 0; }
footer { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer a { margin-right: 16px; }
.small { font-size: 14px; color: var(--muted); }
@media (prefers-color-scheme: dark) {
  :root { --bg: #14181d; --fg: #e8ecf1; --muted: #9aa6b2; --line: #2a3038; --brand: #7fb3e8; }
  p, li { color: #d4dbe3; }
  code { background: rgba(255,255,255,.08); }
}