.modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            justify-content: center;
            align-items: center;
            z-index: 1000;
        }
        .modal.active {
            display: flex;
        }
        .modal-content {
            background: white;
            padding: 20px;
            border-radius: 5px;
            text-align: center;
            max-width: 500px;
            margin: auto;
        }
        #close-modal {
            margin-top: 15px;
            padding: 10px 20px;
            background: #007BFF;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        #close-modal:hover {
            background: #0056b3;
        }