.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 20vh;
    width: 100%;
    height: 50%;
    overflow: hidden;
    text-align: center;
}

.modal-content {
    display: inline-block;
    background-image: linear-gradient(to bottom right, #FFFAE3, #FF9888);
    margin: 70px auto auto auto;
    min-width: 20%;
    padding: 20px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 1px 1px 13px 3px rgba(0,0,0,0.41);
    -webkit-box-shadow: 1px 1px 13px 3px rgba(0,0,0,0.41);
    -moz-box-shadow: 1px 1px 13px 3px rgba(0,0,0,0.41);
}