.auth-backdrop {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(1, 10, 20, 0.85); backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px); z-index: 10000; display: none;
    align-items: center; justify-content: center; font-family: 'Montserrat', sans-serif;
}

.auth-glass {
    background: linear-gradient(160deg, rgba(8, 36, 68, 0.94) 0%, rgba(2, 16, 36, 0.98) 100%);
    border: 2px solid rgba(135, 205, 255, 0.5); border-radius: 8px;
    padding: 26px 28px; box-shadow: 0 30px 80px rgba(0, 0, 0, 0.8);
    text-align: center; max-width: 440px; width: 92%; position: relative; color: #dceaf5;
}

.auth-close { position: absolute; top: 14px; right: 16px; background: none; border: none; color: #8acaff; font-size: 22px; cursor: pointer; }
.auth-title { font-family: 'Cinzel', serif; font-size: 18px; color: #f7eed8; letter-spacing: 2px; margin-bottom: 6px; }

.auth-tabs { display: flex; gap: 4px; margin-bottom: 12px; }
.auth-tab-btn {
    flex: 1; padding: 8px 4px; background: rgba(0, 40, 75, 0.5); border: 1px solid rgba(135, 205, 255, 0.3);
    color: #8acaff; font-size: 9px; font-weight: bold; cursor: pointer; border-radius: 3px;
    font-family: 'Montserrat', sans-serif; text-transform: uppercase;
}
.auth-tab-btn.active { background: #00ffcc; color: #000; border-color: #00ffcc; }

.auth-qr-box { background: #fff; padding: 10px; border-radius: 6px; display: inline-block; margin-bottom: 10px; }
.auth-qr-box img { display: block; width: 170px; height: 170px; }

.auth-btn-row { display: flex; gap: 8px; justify-content: center; margin-top: 10px; }
.auth-btn {
    font-family: 'Cinzel', serif; font-size: 11px; font-weight: 600; letter-spacing: 2px;
    padding: 10px 16px; border-radius: 3px; cursor: pointer; text-transform: uppercase; text-decoration: none; border: none;
}
.btn-gold { background: linear-gradient(135deg, #f2e3c6 0%, #caa974 100%); color: #14100a; }
.btn-cyan { background: rgba(0, 50, 85, 0.6); color: #affcee; border: 1px solid rgba(0, 242, 254, 0.4); }

.code-display-card { background: #060a12; border: 1px solid #00ffcc; padding: 10px; border-radius: 4px; margin: 8px 0; }
.auth-big-code { font-family: 'Cinzel', serif; font-size: 26px; font-weight: 700; color: #00f2fe; letter-spacing: 4px; margin: 4px 0; }
.auth-room-code { font-family: 'Cinzel', serif; font-size: 26px; font-weight: 700; color: #ffd32a; letter-spacing: 6px; margin: 4px 0; }

.auth-pin-container { display: flex; justify-content: center; align-items: center; gap: 5px; margin: 16px 0 10px 0; }
.pin-separator { color: #00f2fe; font-size: 20px; font-weight: bold; padding: 0 4px; }
.auth-pin-slot {
    width: 34px; height: 48px; background: rgba(0, 24, 48, 0.75);
    border: 1.5px solid rgba(0, 242, 254, 0.4); border-radius: 4px;
    display: flex; align-items: center; justify-content: center;
    font-family: 'Cinzel', serif; font-size: 22px; font-weight: 700; color: #00f2fe;
}
.auth-pin-slot.filled { border-color: #00f2fe; color: #fff; background: rgba(0, 40, 80, 0.9); }

.auth-keypad-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; max-width: 250px; margin: 10px auto 0 auto; }
.auth-key-btn {
    font-family: 'Cinzel', serif; font-size: 18px; font-weight: 600; padding: 11px;
    background: rgba(4, 30, 55, 0.6); border: 1px solid rgba(135, 205, 255, 0.3);
    color: #f7eed8; border-radius: 4px; cursor: pointer;
}
.auth-key-btn:hover { background: rgba(0, 80, 130, 0.8); color: #fff; }