header {
    margin-top: -8px;
    text-align: center;
    background-color:black;
    font-size: 60px;
    font-family:sans-serif;
    border-top-right-radius: 1000px;
    border-top-left-radius: 1000px;
    border-top: 4px solid orange;
    border-bottom: 4px solid orange;
    border-left: 4px solid orange;
    border-right: 4px solid orange;
    color:orange;
}
#nav{
     border:1px solid #ccc;
    border-width:1px 0;
    list-style:none;
    margin:0;
    padding:0;
    text-align:left;
    background-color:black;
    border-color:aqua;
   border-bottom-right-radius: 1000px;
    border-bottom-left-radius: 1000px;
    font-size: 20px;
    font-family:sans-serif;
    border-top: 4px solid orange;
    border-bottom: 4px solid orange;
    border-left: 4px solid orange;
    border-right: 4px solid orange;
    text-align:center;
}

#nav li{
    display:inline;
}

#nav a{
    display:inline-block;
    padding:10px;
     text-decoration:none;
    border-width:medium;
    color: orange;
}

.nav > li > a:hover, .nav > li > a:focus {
  background-color: orange;
    color:black; 
}
#nav ul li:hover a{ 
     color:black;
}
#left { 
   width:29%; 
   height: 300px; 
   background:#ffa07a;
   float:left;
    border-top: 4px solid black;
    border-bottom: 4px solid black;
    border-left: 4px solid black;
    border-right: 4px solid black;
    margin-top: 10px;
}

#right { 
   width:69%; 
   height:300px; 
   background:#ff7f50; 
   float:left;
   border-top: 4px solid black;
    border-bottom: 4px solid black;
    border-left: 4px solid black;
    border-right: 4px solid black;
    margin-top: 10px;
    font-size: 20px;
}

#main {
    margin-top: 10px;
    height 100px;
    border-top: 4px solid black;
    border-bottom: 4px solid black;
    border-left: 4px solid black;
    border-right: 4px solid black;
    background-color: orange;
    text-align: center;
}
body{
    background-color: purple;
}

#main2{
    
   border-left: 80px solid black;
    border-right: 80px solid black;
    color: orange;
}

footer {
    margin-top: 4000px;
    
}