:root { color-scheme: light; --bg: #f5f7fa; --panel: #fff; --text: #172033; --muted: #687386; --border: #d3dae4; --error: #dc2626; }
@media (prefers-color-scheme: dark) { :root { color-scheme: dark; --bg: #111318; --panel: #191c23; --text: #eef2f7; --muted: #9aa4b2; --border: #3a414d; --error: #f87171; } }
* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; display: grid; place-items: center; padding: 24px; background: var(--bg); color: var(--text); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.login-card { width: min(400px, 100%); padding: 30px; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; box-shadow: 0 18px 48px rgba(15, 23, 42, .1); }
.logo { width: 42px; height: 42px; }
h1 { margin: 18px 0 5px; font-size: 21px; }
p { margin: 0 0 26px; color: var(--muted); font-size: 13px; }
label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 650; }
input { width: 100%; height: 42px; padding: 0 12px; color: var(--text); background: var(--panel); border: 1px solid var(--border); border-radius: 6px; font: inherit; outline: none; }
input:focus { border-color: #2563eb; box-shadow: 0 0 0 3px rgba(37, 99, 235, .13); }
button { width: 100%; height: 42px; margin-top: 16px; border: 0; border-radius: 6px; color: #fff; background: #2563eb; font: inherit; font-weight: 650; cursor: pointer; }
button:hover { background: #1d4ed8; }
button:disabled { opacity: .55; cursor: wait; }
#login-error { min-height: 18px; margin-top: 12px; color: var(--error); font-size: 12px; }