:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; font: 18px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: radial-gradient(circle at 30% 20%, #2c3566, #11152b 70%); color: #f3f0e8; padding: 16px; }
.box { width: 100%; max-width: 360px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.15); border-radius: 18px; padding: 28px 24px; backdrop-filter: blur(6px); }
.logo { font-size: 42px; text-align: center; letter-spacing: 6px; color: #f2c66d; }
h1 { text-align: center; font-weight: 600; margin: 4px 0 18px; font-size: 26px; }
label { display: block; margin: 12px 0; font-size: 16px; color: #d6d2c6; }
input { display: block; width: 100%; margin-top: 6px; font-size: 20px; padding: 12px 14px; border-radius: 10px; border: 1px solid rgba(255,255,255,.25); background: rgba(0,0,0,.25); color: #fff; }
button { width: 100%; margin-top: 16px; font-size: 20px; padding: 13px; border: 0; border-radius: 10px; background: #f2c66d; color: #1d2340; font-weight: 700; cursor: pointer; }
.err { background: #a33; color: #fff; padding: 8px 12px; border-radius: 8px; text-align: center; }