body {background-color: #CCFFFF; width: 800px;}

p {margin-top: 0px;}

#header {background-color: #6666FF; color: white;} 
#header h1 {margin: 0px; padding: 0px;}

#menu { background-color: #666666; color: white; width: 100%;}

#menu ul {margin: 0px; padding: 0px; list-style: none;}
#menu li {float: left; padding-left: 10px; padding-right: 10px;  } 
#menu li a {color: yellow}