body {
    margin: 0;
    padding: 0;
}

.button {
    background-color: transparent;
    border: solid 2px black;
    cursor: pointer;
    padding: 0.5rem;
    padding-top: 1rem;
    padding-bottom: 1.5rem;
    margin: 0.5rem;
    z-index: 5;
    font-size: 30px;
}

.katze {
    width: 100%;
}