:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --fg: #1a1d21;
  --muted: #5b6470;
  --accent: #0b6e4f;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14171b; --fg: #e8ebef; --muted: #9aa4b1; --accent: #4cc39a; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--fg);
  font: 18px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 16px;
}
.hero { text-align: center; max-width: 36rem; }
.brand { color: var(--accent); font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.85rem; margin: 0 0 0.5rem; }
h1 { font-size: clamp(2rem, 6vw, 3.5rem); margin: 0 0 0.5rem; }
p { color: var(--muted); margin: 0.25rem 0; }
a { color: var(--accent); }