.cover {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: normal;
}

.left {
    float: left;
}

.right {
    float: right;
}

.katalog {
    display: flex;
    align-content: normal;
}

.button {
    background-color: lightgray;
    color: black;
    text-decoration: none;
    border-style: solid;
    border-radius: 3px;
    padding-left: 0.5em;
    padding-right: 0.5em;
}

.cover-img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    max-width: 600px;
}