:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #78716c;
  --accent: #0d9488;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0c0a09; --fg: #f5f5f4; --muted: #a8a29e; --accent: #2dd4bf; }
}
* { box-sizing: border-box; margin: 0; }
html, body { height: 100%; }
body {
  display: flex; flex-direction: column;
  background: var(--bg); color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 2rem 1rem; text-align: center;
}
h1 { font-size: clamp(2.5rem, 8vw, 5rem); letter-spacing: -0.03em; color: var(--accent); }
.tagline { margin-top: .5rem; font-size: 1.25rem; color: var(--muted); }
footer { padding: 1.5rem 1rem; text-align: center; font-size: .875rem; color: var(--muted); }