:root { color-scheme: light dark; font-family: Inter, system-ui, sans-serif; }
* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; display: grid; place-items: center; background: #f4f7fb; color: #182230; }
.auth-card { width: min(92vw, 420px); padding: 2.25rem; border-radius: 18px; background: #fff; box-shadow: 0 18px 55px #23344d22; }
.auth-card img { display: block; max-width: 190px; max-height: 58px; margin: 0 auto 1.5rem; }
h1 { margin: 0 0 .5rem; font-size: 1.75rem; }
p { color: #526174; line-height: 1.5; }
label { display: block; margin: 1rem 0 .4rem; font-weight: 650; }
input { width: 100%; padding: .8rem .9rem; border: 1px solid #b9c5d3; border-radius: 9px; font: inherit; background: #fff; color: #182230; }
input:focus { outline: 3px solid #2878ff33; border-color: #2878ff; }
button { width: 100%; margin-top: 1.3rem; padding: .85rem; border: 0; border-radius: 9px; background: #1769e0; color: #fff; font: inherit; font-weight: 700; cursor: pointer; }
button:hover { background: #1158bf; }
.error { margin-top: 1rem; padding: .8rem; border-radius: 8px; background: #ffe8e8; color: #8b1515; }
a { display: block; margin-top: 1rem; text-align: center; color: #1769e0; }
@media (prefers-color-scheme: dark) { body { background: #18202b; color: #edf3fa; } .auth-card { background: #253140; } p { color: #b9c6d5; } input { background: #1d2733; color: #edf3fa; border-color: #526174; } }