.avatar {
    line-height: 0;		/* remove line-height */
    display: inline-block;	/* circle wraps image */
    margin: 5px;
    border: 0.5px solid rgba(255,255,255,0.4);
    border-radius: 50%;	/* relative value */
    /*box-shadow: 0px 0px 5px rgba(0,0,0,0.4);*/
    transition: linear 0.25s;
    height: 100px;
    width: 100px;
}