/* Interstitial Ad Countdown Overlay */
#ad-countdown-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.3s ease;
    pointer-events: all;
}

#ad-countdown-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.ad-countdown-text {
    font-family: 'Titan One', cursive;
    font-size: calc(64 * var(--px));
    color: #fff;
    text-shadow: 
        0 0 calc(20 * var(--px)) rgba(255, 200, 100, 0.8),
        0 0 calc(40 * var(--px)) rgba(255, 150, 50, 0.5);
    animation: countdown-pulse 1s ease-in-out infinite;
}

#ad-countdown-number {
    display: inline-block;
    min-width: calc(80 * var(--px));
    text-align: center;
    color: #ffcc00;
}

@keyframes countdown-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}