:root { color-scheme: dark; --bg: #14161a; --fg: #e8e8e8; --muted: #9aa0a6; --accent: #5fbf4a; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; padding: 16px; }
main { text-align: center; max-width: 40rem; }
h1 { font-size: clamp(2rem, 6vw, 3.5rem); margin: 0 0 .5rem; color: var(--accent); letter-spacing: .02em; }
p { color: var(--muted); margin: .25rem 0; }
.back { margin-top: 2rem; }
a { color: var(--fg); }