.w3c-modal {
    z-index: 10;
    display: none;
    padding-top:90px;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0, 0, 0);
    background-color: rgba(0, 0, 0, 0.4);
    padding-bottom: 10px;
}

.w3c-modal-content{
    margin: auto;
    background-color: #fff;
    position: relative;
    padding: 0;
    outline: 0;
    width: 600px;
    height: auto;
    padding-bottom: 10px;
}

@media (max-width: 600px) {
    .w3c-modal-content {
        margin: 0 10px;
        width: auto !important
    }

    .w3c-modal {
        padding-top: 30px
    }
}

@media (max-width: 768px) {
    .w3c-modal-content {
        width: 500px
    }

    .w3c-modal {
        padding-top: 50px
    }
}

@media (min-width: 993px) {
    .w3c-modal-content {
        width: 900px
    }
}