body {
    margin: 0; 
    padding: 0; 
}

header {
    font-size: 3em;
    padding: 2em; 
    background: #aaa; 
    text-align: center; 
}

.container {
    width: 1020px; 
    margin: auto; 
}

menu {
    width: 300px; 
    float: left; 
    background: #eee; 
    padding: 0; 
    margin: 0; 
}

menu ul {
    margin: 0; 
    padding: 0; 
}

menu li {
    list-style-type: none; 
}

menu li a {
    text-decoration: none; 
    color: #333; 
    font-weight: bold; 
    display: block; 
    border-bottom: 1px solid gray; 
    padding: 10px; 
}

menu li a:hover {
    background: #333; 
    color: white; 
}

main {
    width: 700px; 
    float: left; 
    margin-left: 20px; 
}

main p {
    text-align: justify; 
}

footer {
    clear: both; 
    background: #333; 
    color: white; 
    font-weight: bold; 
    padding: 2em; 
}