:root { --bg: #f5f7f5; --fg: #17201b; --muted: #4d5a52; --line: #d6ddd8; --accent: #1f6b45;
  color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1411; --fg: #e6ece8; --muted: #a3b0a8; --line: #2a342e; --accent: #5cc48c; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; }
main { max-width: 640px; margin: 0 auto; padding: 32px max(16px, env(safe-area-inset-left)) 48px; }
nav { display: flex; gap: 16px; font-size: 14px; margin-bottom: 28px; }
a { color: var(--accent); }
h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 28px 0 6px; }
p, li { margin: 0 0 10px; }
.date { color: var(--muted); font-size: 14px; margin-bottom: 20px; }
.mail { font-family: ui-monospace, Menlo, monospace; font-size: 15px; }