:root { color-scheme: dark; font-family: Inter, ui-sans-serif, system-ui, sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #11131a; color: #f6f7fb; }
main { width: min(92vw, 560px); padding: 2.5rem; border: 1px solid #2d3140; border-radius: 18px; background: #1a1d27; box-shadow: 0 18px 70px #0008; }
h1 { margin: 0 0 1rem; font-size: clamp(1.65rem, 5vw, 2.25rem); }
p { color: #c7cad5; line-height: 1.6; }
.ok { color: #73e0a9; }
.error { color: #ff9b9b; }
a.button { display: inline-block; margin-top: 1rem; padding: .8rem 1.1rem; border-radius: 9px; background: #ff424d; color: #fff; text-decoration: none; font-weight: 700; }
small { color: #888e9e; }