/*******************************************************************************
* Bildergalerie - Variante 3 (Lightbox)
*******************************************************************************/

div.quadrat {
    float: left;
    width: 100px;
    height: 100px;
    margin-right: 5px; 
    margin-bottom: 5px;
    background-color: #fff;
    border: 1px solid #ccc;
    position: relative;
}
div.quadrat:hover {
    border: 1px dotted red;
}
div.quadrat img {
    position: absolute;
    left: 0;
    top: 0;
}