body {
    font-family: Arial, Helvetica, sans-serif
    font-style: black;
    font-size: xx-large;
    margin: 0;
    padding: 0;
    color: white;
    background-color: black;
    margin-left: 100px;
    margin-right: 100px;
}

.navi {
    text-align: center;
    margin-top: 10px;
}

a {
    color: gray;
    text-decoration: none;
    margin-left: 50px;
}

a:hover {
    color: blue;
}

h1 {
    margin-top: 100px;
    text-align: start;
}

img {

    width: 50%;
    margin-top: 50px;
    margin-left: 300px;
    border-radius: 10px;
}

.button {
    color: white;
    background-color: blue;
    padding: 5px 50px;
    display: inline-block;
    border-radius: 8px;
    margin-top: 20px;
    margin-bottom: 20px;
    margin-left: 150px;
    align-items: center;
    justify-content: center;
    display: inline-flex;
}

.button:hover {
    background-color: gray;
    color: black;
}

.oben {
    text-align: end;
    margin-bottom: 30px;
}

ul {
    list-style-type: none;
    text-align: center;
    margin-bottom: 100px;
}

footer {
    margin-bottom: 50px;
}

@media screen and (max-width: 620px) {
   
    .button {
    color: white;
    background-color: blue;
    padding: 5px 50px;
    display: inline-block;
    border-radius: 8px;
    margin-top: 10px;
    margin-bottom: 1px;
    margin-left: 100px;
    align-items: center;
    justify-content: center;
    display: inline-flex;
}
  
.navi {
    
    margin-top: 1px;
}
img {

    width: 50%;
    margin-top: 50px;
    margin-left: 100px;
    border-radius: 10px;
}

a {
    color: gray;
    text-decoration: none;
    margin-left: 1%;
    font-size: large;
}

ul {
    list-style-type: none;
    text-align: center;
    margin-bottom: 30px;
}

}