.wfpopup {
    position: relative;
    display: inline-block;

}

.wfpopup:after {
    content: "";
    /* generate the pseudo */
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--uab-green);
    color: var(--white);
    font-size: 24px;
    font-weight: 600;
    opacity: 0;
    /* start hidden */
    transition: opacity 0.3s ease;
    /* animate opacity only */
}

.wfpopup:hover:after {
    content: "Enlarge Image";
    /* swapping content happens instantly */
    opacity: .7;
    /* this will fade in */

}

/*BEGIN Registered Article */

.registered-article {
    padding: 1rem;
    background-color: rgba(255, 212, 0, .15);
    position:relative;
}

.registered-article:before {
content: "Registered Article";
background-color: var(--loyal-yellow);
padding: 5px 10px;
border-radius: 20px;
font-weight: 600;
margin-bottom: 5px;
display: inline-block;
font-size: 16px;
position:absolute;
left:10px;
top:10px;
}

/*END Registered Article */