.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999;
}

.modal-box {
    width: 500px;
    background: #fff;
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    font-family: Arial;
    box-shadow: 0 0 10px rgba(0,0,0,0.3);
}

.close-btn {
    margin-top: 10px;
    padding: 6px 12px;
    border: none;
    background: #007bff;
    color: white;
    border-radius: 4px;
    cursor: pointer;
}