#overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgb(212 221 211 / 90%);
            display: none;
            justify-content: center;
            align-items: center;
            flex-direction: column;
            z-index: 9999;
        }

        .loader {
            border: 10px solid #f3f3f3;
            border-top: 10px solid #3498db;
            border-radius: 50%;
            width: 80px;
            height: 80px;
            animation: spin 1s linear infinite;
            margin-bottom: 20px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .countdown {
            font-size: 24px;
            font-weight: bold;
            color: #333;
        }