main {
    grid-template-rows: 50% 50%;
    grid-template-columns: 50% 50%;
}

#img1, #img2, #img3, #img4, #img5 {
    height: 80%;
    width: 80%;            
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    transition: all 1s ease;
}

#img1 {
    background-image: url(../medien/fantasy_01.jpg);
    grid-row: 1/2;
    grid-column: 1/2;
}

#img2 {
    background-image: url(../medien/fantasy_02.jpg);
    grid-row: 1/2;
    grid-column: 2/3;
}

#img3 {
    background-image: url(../medien/fantasy_03.jpg);
    grid-row: 2/3;
    grid-column: 2/3;
}

#img4 {
    background-image: url(../medien/landscape_02.jpg);
    grid-row: 2/3;
    grid-column: 1/2;
}

#img5 {
    height: 95%;
    width: 95%;
    background-image: url(../medien/landscape_01.jpg);
    grid-row: 1/3;
    grid-column: 1/3;
}

.hidden {
    opacity: 0;
}