header{
    width: 100%;
    padding: 15px 0;
    margin: 0 auto;
    text-align: center;
}

header .headline{
    font-size: 32px ;
}

.nav-list{
    text-align: center;
    padding: 10px 0;
    margin: 0;
}
.nav-list-item{
    list-style: none;
    display: inline-block;
    margin: 0 20px;
}


body {
 margin : 60px;
 font-family: serif;
 background: white;
}