body {
    font-family: 'Arial', 'Helvetica Neue', Helvetica, sans-serif;
    color: #777777;
    background-color: #777777;
    width: 960px;
    font-size: 18px;
    margin: auto;
    text-align: center;
}
.light_bgcolor{
    background-color: #ebebeb;
}
header {
    margin:10px auto;
    padding:20px;

}
nav {
    margin-bottom: 15px;
    padding:20px;
}
.container::after {
    content:"";
    clear:both;
    display: block;
}
section {
    padding: 20px 5px 5px 5px;
    width:495px;
    height: 205px;
    float: left;
    margin-bottom: 15px;
    margin-right: 15px;
}
article{
    margin:20px 5px 5px 5px;
    padding:10px;
    color: #ebebeb;
    background-color: #777;
}
h1, p {
    margin:10px;
    padding:10px;
    color:#777;
    background-color: #ebebeb;
}

aside{
    padding: 20px;
    height: 190px;
    width: 400px;
    float: left;
    margin-bottom: 15px;
}
footer {
    margin:auto;
    padding:20px;
}