#main-content-a {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.main-content-a-1 {
    text-align: center;
}

.main-content-a-1::after {
    content: "";
    display: table;
    clear: both;
}

.text-1 {
    font-weight: bold;
    font-size: 50px;
}

#main-content-d {
    margin-top: 150px;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.column-1 {
    float: left;
    padding: 10px;
}

.column-1.left {
    width: 50%;
    text-align: center;
    padding-right: 10px;
}

.column-1.right {
    width: 50%;
    text-align: center;
    padding-left: 10px;
}

@media screen and (max-width: 600px) {
    .column-1.left, .column-1.right {
        width: 100%;
        text-align: center;
        padding-top: 0;
    }
}

.bild-3 {
    width: 100%;
}