:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --text: #1a2027;
  --muted: #5e6673;
  --accent: #4a8cc9;
  --border: #e3e7ec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d11;
    --text: #f5f7fa;
    --muted: #9ba3af;
    --accent: #6cace4;
    --border: #20262f;
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  padding: 48px 24px 80px;
}
main { max-width: 680px; margin: 0 auto; }
h1 { font-size: 1.9rem; margin-bottom: 4px; letter-spacing: -0.02em; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; letter-spacing: -0.01em; }
p, li { color: var(--text); margin-bottom: 12px; }
ul { padding-left: 22px; margin-bottom: 12px; }
li { margin-bottom: 6px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.meta { color: var(--muted); font-size: 0.95rem; margin-bottom: 28px; }
.crumb { display: inline-block; color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }
hr { border: none; border-top: 1px solid var(--border); margin: 36px 0; }
footer { color: var(--muted); font-size: 0.9rem; margin-top: 48px; }