body{
    margin: 0px;
    background-color: rgb(143, 143, 243);
}

header{
    background-color: red;
    height: 90px;
}

header nav{
    float: right;
}

header nav ul li, a{
    display: inline-block;
    color: aliceblue;
    text-decoration: none;
    padding: 10px;
}