staffmanager/public/css/profile.css

/* HIDE RADIO */
[type=radio] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

/* IMAGE STYLES */
[type=radio] + img {
    cursor: pointer;
}

/* CHECKED STYLES */
[type=radio]:checked + img {
    outline: 2px solid #4cc633;
}