.thumbnail{display:flex;text-align:center;justify-content:center;flex-wrap:wrap;-ms-flex-wrap:wrap}.menu li{margin:10px;display:block}.thumbnails img{width:300px;height:auto;margin:10px}@media screen and (max-width:900px){.menu li{margin:10px 5px}.thumbnails img{width:80%;height:auto;margin:10px}}