body {
    margin: 0; 
    padding: 0; 
}
header {
    background: #333; 
    color: white; 
    font-size: 4em; 
    padding: 1em; 
    text-align: center; 

}

.container {
    width: 1300px; 
    margin: auto; 
}

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

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

menu ul li {
    margin: 0; 
    padding: 0; 
    list-style-type: none; 
}

menu ul li a {
    text-decoration: none; 
    color: #333; 
    display: block; 
    padding: 10px; 
    border-bottom: 1px solid #eee; 
}

menu ul li a:hover {
    background: orange; 
    color: white; 
    transition: 0.5s;
}

main {
    float: left; 
    width: 950px; 
    padding-left: 1em; 
}

footer {
    float: left; 
    width: 100%; 
    clear: both; 
    background: #888; 
    padding: 1em; 
}