html {background: #05934C}

body {
   margin: 30px auto;
   background: white;
   width: 800px;
   }
   header 
   {background: pink;
   text-align: center;
   color: black;
   padding: 10px;
   }
   
header h1 {
    font: 50px Arial;
    }   
   
nav a {
    color: blue;
    padding: 20px;
    text-decoration: none;
    font: 20px Arial;
    }   
   
nav a:hover {
    text-decoration: underline;
    }   

main {
    padding: 20px;
    }

footer {
    text-align: center;
    }