/* Pop-up overlay styles */
        .popup-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.8);
            z-index: 1000;
            display: flex;
            justify-content: center;
            align-items: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        
        .popup-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        
        /* Pop-up container styles */
        .popup-container {
            background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
            border: 2px solid #ff0000;
            border-radius: 10px;
            padding: 25px;
            max-width: 400px;
            width: 90%;
            position: relative;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            transform: scale(0.7);
            transition: all 0.3s ease;
        }
        
        .popup-overlay.active .popup-container {
            transform: scale(1);
        }
        
        /* Close button styles */
        .popup-close {
            position: absolute;
            top: 15px;
            right: 20px;
            font-size: 28px;
            color: #fff;
            cursor: pointer;
            z-index: 1001;
        }
        
        .popup-close:hover {
            color: #ff6b35;
        }
        
        /* Content styles */
        .popup-header {
            text-align: center;
            margin-bottom: 20px;
        }
        
        .popup-title {
            color: #ff1100;
            font-size: 22px;
            margin-bottom: 10px;
            font-family: Arial, sans-serif;
        }
        
        .popup-subtitle {
            color: #ffffff;
            font-size: 16px;
        }
        
        /* Ad container styles */
        .ad-container {
            display: flex;
            justify-content: center;
            margin: 20px 0;
            position: relative;
        }
        
        .ad-frame {
            border: none;
            border-radius: 5px;
        }
        
        /* Timer styles */
        .timer-container {
            text-align: center;
            margin-top: 15px;
        }
        
        .timer-text {
            color: #ff1100;
            font-size: 14px;
            margin-bottom: 5px;
        }
        
        .skip-button {
            background: #ff0000;
            color: white;
            border: none;
            padding: 8px 15px;
            border-radius: 5px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s ease;
            margin-top: 10px;
        }
        
        .skip-button:hover {
            background: #ed2521;
        }
        
        .skip-button:disabled {
            background: #666;
            cursor: not-allowed;
        }
        
        /* Mobile responsiveness */
        @media (max-width: 768px) {
            .popup-container {
                max-width: 350px;
            }
            
            .popup-title {
                font-size: 20px;
            }
        }