img {
    padding: 1ch;
    border: 1px solid transparent;
    width: 20ch;
}

img:hover {
    padding: 1ch;
    border: 1px solid #9c9c9c;
    background-color: #f0f0f0;/*#ebebeb;*/
    box-shadow: -2px 2px 5px #888888;
}