/* Source: https://www.w3schools.com/css/css_image_gallery.asp --> */
    div.gallery {
        border: 1px solid #ccc;
    }

    div.gallery:hover {
        border: 1px solid #777;
    }

    div.gallery img {
        width: 100%;
        height: auto;
    }

    div.desc {
        padding: 15px;
        text-align: center;
        font-family: Arial;
    }

    * {
        box-sizing: border-box;
    }

    .responsive {
        padding: 0 6px;
        float: left;
        width: 24.99999%;
    }

    @media only screen and (max-width: 700px) {
        .responsive {
            width: 49.99999%;
            margin: 6px 0;
        }
    }

    @media only screen and (max-width: 500px) {
        .responsive {
            width: 100%;
        }
    }

    .clearfix:after {
        content: "";
        display: table;
        clear: both;
    }