body { margin: 0; min-height: 100vh; display: grid; place-items: center;
  background: #0f1115; color: #f2f2f2; font-family: system-ui, sans-serif; }
main { text-align: center; }
h1 { font-size: 40px; margin: 0 0 8px; }
p { color: #9aa0a6; margin: 0; }