:root {
  --ink: #151C24; --paper: #F4F5F3; --surface: #FFFFFF;
  --graphite: #59636E; --signal: #7C2D3A; --border: #E0E4E7;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #EEF0F2; --paper: #101519; --surface: #171D23;
    --graphite: #9AA4AD; --signal: #C96A78; --border: #2A333B;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
main { max-width: 42rem; margin: 0 auto; padding: 48px 16px 64px; }
header p { margin: 0; color: var(--graphite); font-size: 15px; }
h1 { font-size: 34px; line-height: 1.15; margin: 4px 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
     color: var(--graphite); margin: 36px 0 8px; }
section { background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
          padding: 4px 20px; }
a { color: var(--signal); }
nav { margin-top: 40px; font-size: 15px; color: var(--graphite); }
nav a { margin-right: 16px; }