matemat/static/css/matemat.css

.thumblist-item {
    display: inline-block;
    margin: 10px;
    padding: 10px;
    background: #f0f0f0;
    text-decoration: none;
}

.thumblist-item a {
    text-decoration: none;
}

.thumblist-item .imgcontainer {
    width: 150px;
    height: 150px;
    position: relative;
}

.thumblist-item .imgcontainer img {
    max-width: 150px;
    max-height: 150px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.thumblist-title {
    display: block;
    font-weight: bolder;
}

@media print {
    footer {
        position: fixed;
        bottom: 0;
        font-size: 0.8em;
    }
    footer li {
        display: inline-block;
        margin-right: 40px;
    }
}