:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
body { display: grid; place-items: center; min-height: 100vh; margin: 0; }
.card { width: min(24rem, 90vw); padding: 2rem; border: 1px solid color-mix(in srgb, currentColor 20%, transparent); border-radius: 8px; }
label { display: block; margin-block: 0.75rem; }
input { display: block; width: 100%; box-sizing: border-box; padding: 0.5rem; margin-top: 0.25rem; }
button { margin-top: 1rem; padding: 0.5rem 1rem; }
.error { color: #b00020; }