body {
    padding: 0;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

@media screen and (win-width: 800px) {
    
}

header {
    padding: 0;
    margin: 10px;
}

header {
    position: sticky;
    top: 0;
    
}

.mitte {
    display: flex;
    justify-content: center;
    align-items: center;
}

header ul, footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

header ul li a, footer ul li a {
       margin: 25px;
       font-weight: 700; 
}


section {
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 16px;
    padding-right: 16px;
}