:root { color-scheme: dark; }
body { margin: 0; background: #000; color: #fff; font: 16px/1.6 -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased; }
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 80px; }
h1 { font-size: 2rem; line-height: 1.1; letter-spacing: -0.025em; margin: 18px 0 4px; }
h2 { font-size: 1.1rem; letter-spacing: -0.01em; margin: 32px 0 6px; }
p, li { color: rgba(235, 235, 245, 0.8); }
ul { padding-left: 20px; }
a { color: #0a84ff; }
.muted { color: rgba(235, 235, 245, 0.5); margin: 0; }
.back { text-decoration: none; font-weight: 600; }