[hidden] { display: none !important; }
.student-login { display: grid; place-items: center; min-height: 100vh; padding: 32px 18px; background: radial-gradient(ellipse at 50% 0, #36305b 0, #10132c 60%); }
.student-login main { margin: 0; flex: initial; min-width: 0; }
.login-panel { width: min(560px, 100%); padding: 36px; border: 1px solid #ffffff1c; border-radius: 24px; background: #1b1d35; text-align: center; box-shadow: 0 24px 90px #0004; }
.login-panel .brand { justify-content: center; margin-bottom: 32px; }.login-panel h1 { font-size: clamp(32px, 5vw, 46px); margin: 16px 0; }.login-panel p { line-height: 1.65; }.login-panel .eyebrow { margin-top: 24px; }
.camera-preview { position: relative; aspect-ratio: 4/3; background: #101226; border-radius: 18px; overflow: hidden; margin: 24px 0 18px; display: grid; place-items: center; }.camera-preview video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }.scan-frame { width: 55%; aspect-ratio: 1; position: absolute; border: 3px solid #bba0ff; border-radius: 18px; pointer-events: none; box-shadow: 0 0 0 180px #10122644; }#camera-placeholder { position: absolute; background: #101226d9; padding: 12px; border-radius: 12px; }.camera-note { font-size: 12px; color: #a2a7c0; margin-top: 24px; }#scan-status { min-height: 52px; }#scan-status.error { color: #ffb3bb; }
.live-status { color: #73dbca; }.live-notice { border: 1px solid #a68bff55; border-radius: 14px; padding: 18px; margin-top: 16px; background: #a68bff0c; }.live-notice button { margin: 8px 8px 0 0; }.live-notice p { line-height: 1.6; }.connection-status { font-size: 12px; color: #bfc2d9; }.online-empty { padding: 24px 0; color: #aaaec8; line-height: 1.65; }.top-actions form { display: inline; }.top-actions { flex-wrap: wrap; }.answer:disabled { cursor: default; }button.chapter:disabled { opacity: .55; cursor: not-allowed; }
@media(max-width:600px) { .login-panel { padding: 24px 18px; }.student-login { padding: 16px; }.login-panel .brand { margin-bottom: 20px; } }
@media(min-width:601px) and (max-height:850px) { .student-login { padding: 18px; }.login-panel { padding: 24px 32px; }.login-panel h1 { font-size: 32px; line-height: 1.15; margin: 12px 0; }.login-panel .brand { margin-bottom: 16px; }.login-panel .eyebrow { margin-top: 14px; }.camera-preview { aspect-ratio: 16/9; margin: 16px 0; }#scan-status { min-height: 0; }.login-panel .camera-note { margin-top: 16px; }.login-panel p { margin: 10px 0; } }