* {
    box-sizing: border-box;
    }

    .row > .column {
    padding: 0 8px;
    }

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

    .column {
    float: left;
    width: 25%;
    border:3px solid white;
    }

    /* The Modal (background) */
    .modal {
    display: none;
    position: fixed;
    z-index: 1;
    padding-top: 100px;
    left: 0;
    top: 0;
    width: 100%; /* bisher "100%" */
    height: 100%;
    overflow: auto;
    /*background-color: grey; /* bisher "black" */
    background:rgba(40,40,40, 0.9);
    }

    /* Modal Content */
    .modal-content {
    position: relative;
    background-color: #fefefe;
    margin: auto;
    padding: 0;
    width: 100%; /* bisher 90% */
    max-width: 800px; /* bisher 1200 */
    }

    /* The Close Button */
    .close {
    color: white;
    position: absolute;
    top: 10px;
    right: 25px;
    font-size: 35px;
    font-weight: bold;
    }

    .close:hover,
    .close:focus {
    color: #999;
    text-decoration: none;
    cursor: pointer;
    }

    .mySlides {
    display: none;
    }

    .cursor {
    cursor: pointer;
    }

    /* Next & previous buttons */
    .prev,
    .next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    width: auto;
    padding: 16px;
    margin-top: -50px;
    color: #045FB4; /* bisher "white" */
    font-weight: bold;
    font-size: 20px;
    transition: 0.6s ease;
    border-radius: 0 3px 3px 0;
    user-select: none;
    -webkit-user-select: none;
    }

    /* Position the "next button" to the right */
    .next {
    right: 0;
    border-radius: 3px 0 0 3px;
    }

    /* Position the "preview button" to the left */
    .prev {
    left: 0;
    border-radius: 3px 0 0 3px;
    }

    /* On hover, add a black background color with a little bit see-through */
    .prev:hover,
    .next:hover {
    background-color: rgba(0, 0, 0, 0.8);
    }

    /* Number text (1/3 etc) */
    .numbertext {
    color: #f2f2f2;
    font-size: 12px;
    padding: 8px 12px;
    position: absolute;
    top: 0;
    }

    img {
    margin-bottom: -5px;
    }

    .caption-container {
    text-align: center;
    background-color: black;
    padding: 2px 16px;
    color: white;
    }

    .demo {
    opacity: 0.6;
    }

    .active,
    .demo:hover {
    opacity: 1;
    }

    img.hover-shadow {
    transition: 0.3s;
    }

    .hover-shadow:hover {
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    }