#age-verification-modal {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background-color: rgba(0,0,0,0.8);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

#age-verification-modal .modal-content {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
}