.overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            z-index: 999;
        }
        
        .promo-modal {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
            z-index: 1000;
            max-width: 450px;
            width: 90%;
            text-align: center;
            border: 3px solid #00a2fb;
            animation: fadeIn 0.5s;
            font-family: Arial, sans-serif;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translate(-50%, -55%); }
            to { opacity: 1; transform: translate(-50%, -50%); }
        }
        
        .close-btn {
            position: absolute;
            top: 10px;
            right: 15px;
            font-size: 24px;
            font-weight: bold;
            background: none;
            border: none;
            cursor: pointer;
            color: #777;
            transition: color 0.3s;
        }
        
        .close-btn:hover {
            color: #333;
        }
        
        .title {
            font-size: 22px;
            font-weight: bold;
            color: #00a2fb;
            margin-bottom: 15px;
        }
        
        .promo-code {
            background-color: #00a2fb;
            color: white;
            padding: 15px 25px;
            border-radius: 5px;
            font-size: 28px;
            font-weight: bold;
            margin: 20px 0;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-block;
            box-shadow: 0 4px 8px rgba(0, 162, 251, 0.3);
        }
        
        .promo-code:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 12px rgba(0, 162, 251, 0.4);
        }
        
        .timer {
            font-size: 24px;
            font-weight: bold;
            color: #e74c3c;
            margin: 15px 0;
        }
        
        .benefits {
            text-align: left;
            margin: 20px 0;
            padding-left: 20px;
        }
        
        .benefits li {
            margin-bottom: 8px;
            position: relative;
            list-style-type: none;
            padding-left: 25px;
        }
        
        .benefits li:before {
            content: "✓";
            color: #00a2fb;
            font-weight: bold;
            position: absolute;
            left: 0;
        }
        
        .small-text {
            font-size: 12px;
            color: #777;
            margin-top: 20px;
        }