.gallery{
    display: block;
    background-color: transparent;
    padding: 5px;
    margin-left:auto;
    margin-right: auto;
    width:80%;
}

.illust{
    display: inline-block;
    height: 350px;
    box-shadow: 0px 8px 16px black;
}

.illust img{
    width: auto;
    height: 100%;
}