.modal-separator{
    border-left: 1px solid silver;
    height: 50px;
    position: absolute;
    bottom: 0;
    left: calc(50%);
    display: block;
}
.modal-left-button,.modal-right-button{
    display: block;
    width: 49%;
    height: 48px;
    position: absolute;
    bottom: 0;
    left: 0;
    text-align: center;
    line-height: 50px;
    
}
.modal-right-button{
    left: auto;
    right: 0;
}