:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #eef2f7; color: #172033; }
.card { width: min(680px, calc(100% - 3rem)); padding: 2.5rem; border-radius: 1rem; background: white; box-shadow: 0 18px 50px rgba(20, 30, 50, .12); }
.variant-b { background-image: url('/index.php?asset=variant_b_background'); background-size: cover; }
small { color: #667085; }