body, ul, li, h1, h2, a{
    margin: 0;
    padding: 0;
    font-family: arial;
}

header{
    text-align:center;
}
nav{
    background-color: #000000;
    padding: 20px;
    position: sticky;
    top: 105px;
}
nav ul{
    white-space: nowrap;
    max-width: 650px;
    margin: 0 auto;
}
nav li{
    
    width: 70%;
    display: inline-block;
    font-size: 25px;
}
nav li a{
    text-decoration: none;
    color: #fffefe;
}
main{
    max-width: 100%;
    width: 1200px;
    margin: 80px auto;
    padding: 0 40px;
    box-sizing: border-box;
}
nav li a:hover{
    text-decoration: underline;
    padding: 0.1px;
}