h2, h1, h3{color:white;text-align:center;padding:5px} h2{background:#033} h3{background:#025;} h1{background:olive;}#nav img{width:10%}#nav{text-align:center}#navbar{background-color:black;padding:5px;}#navbar a{display:inline-block;padding:10px 20px;color:white;text-align:center;text-decoration:none}p, .justify{text-align:justify;}#subject a{color:green;padding:10px 8px;text-decoration:none;display:block;}#class a, #menu a{padding:8px 16px;text-decoration:none;display:inline-block;color:black;}#subject a{color:green;}#bottom{padding:10px;}.sidenav{background:#022;position:sticky;top:0;}.sidenav a, .dropdown-btn{display:block;padding:11px;color:white;text-decoration;none;outline;none;background:green;border:none;width:100%}.dropdown-container{display:none;