:root { font-family: system-ui, sans-serif; }
body { margin: 0; }
#gate { min-height: 100vh; display: grid; place-items: center; }
#gate form { display: grid; gap: .75rem; width: min(320px, 90vw); }
#gate-error { color: #c0392b; min-height: 1.2em; margin: 0; }