#cert {
    padding-top: 100px;
    margin-left: 40px;
    margin-right: 40px;
}


/* * {box-sizing: border-box;} */

.imagecontainer {
    position: relative;
    /* width: 30%; */
    /* max-width: 300px; */
}

.image {
    display: block;
    /* width: 100%; */
    height: auto;
}

.overlay {
    position: absolute;
    bottom: 0;
    background: rgb(0, 0, 0);
    background: rgba(0, 0, 0, 0.5);
    /* Black see-through */
    color: #f1f1f1;
    width: 100%;
    transition: .5s ease;
    opacity: 0;
    color: white;
    font-size: 20px;
    padding: 20px;
    text-align: center;
}

.container:hover .overlay {
    opacity: 0.5;
}