:root {
  --bg: #f7f5f0;
  --text: #1b1b1b;
  --muted: #5c5a55;
  --rule: #dcd8cf;
  --link: #1b1b1b;
  --accent: #b4532a;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121211;
    --text: #ecebe7;
    --muted: #a3a19b;
    --rule: #2e2d2a;
    --link: #ecebe7;
    --accent: #e08a5f;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
}

main, footer {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px;
}

main { padding-top: 64px; padding-bottom: 48px; }

h1 {
  font-size: 2.4rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

h2 {
  font-size: 1.15rem;
  margin: 40px 0 8px;
}

.tagline {
  font-size: 1.25rem;
  color: var(--accent);
  margin: 0 0 32px;
}

p, ul { margin: 0 0 16px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }

.note {
  color: var(--muted);
  font-size: 0.95rem;
  border-top: 1px solid var(--rule);
  padding-top: 16px;
  margin-top: 40px;
}

.meta { color: var(--muted); font-size: 0.95rem; margin-bottom: 32px; }

.back { display: inline-block; margin-bottom: 24px; font-size: 0.95rem; }

footer {
  border-top: 1px solid var(--rule);
  padding-top: 20px;
  padding-bottom: 40px;
  color: var(--muted);
  font-size: 0.9rem;
}

footer a { color: var(--muted); margin-right: 16px; }

code { font-size: 0.85em; word-break: break-all; }