.shell{width:90%;height:450px;display:flex}.box img,.box:hover img{width:100%;height:100%}.box{flex:1;overflow:hidden;transition:.5s;margin:0 15px;box-shadow:10px 10px 20px rgba(0,0,0,.5);border-radius:20px;border:10px solid #fff;background:#fff}.box img{object-fit:cover;transform:.5s}.box:hover{flex-basis:50%}