.avatar {
    display: block;
    width: 60px;
    height: 60px;
    cursor: pointer;
    transition: transform 250ms cubic-bezier(.25,.1,.11,2.43), box-shadow 250ms ease-in-out;
}

.avatar:hover {
    transform: scale(1.08);
    box-shadow: 5px 5px 0px #000;
}