.topnav {
    overflow: hidden;
    background-color:Black;
}

.topnav a {
    float:left;
    color:#f2f2f2;
    text-align:center;
    padding:16px 24px;
    font-size:16px;
    text-decoration:none;
    display:block;
}

.topnav a:hover {
    background-color:#ddd;
    color:black;
}

.topnav a.active {
    background-color:#ff1a1a;
    color:white;
}

div { padding:16px;
background-color:Bisque;

footer {
    padding:16px;
    background-color:#ff1a1a;
}

header { 
    background-color:gray;
    padding:20px;
    text-align:center;
    font-size:35px;
    color:color;
}