@charset "UTF-8" ;

article, aside, footer, header, main, nav, section {
    display: block;

}

html, body, h1, h2, h3, ul, li, a, p, article,
aside, footer, header, main, nav, section {

    padding: 0;
    marigin 0;

}

.banner {
    background-color: #11233b;
    color:white;
    padding: 10px 20px;
}
 body {
    width: 960px;
    margin-left: auto;
    margin-right: auto;
    background-color: #f0f0f0;
    font-family: Helvetica, Arial, sans-serif;
    font-size: 15px;
 }
 nav {
    background-color: #20416c;
    paddding: 5px;
    margin-top: 1px;

 }
 li a {
    color: white;
 }
 li {
    display: inline;
    margin-left: 15px;
    margin-right: 15px;
    font-size: 20px;
    font-variant: small-caps;
    font-weight: bold;
 }
 section {
    background-color: #bbbbbb;
    margin-top: 10px;
    padding: 5px;
 }
 article {
    background-color: white;
    margin-top: 5px;
    padding: 10px 15px;
 }
 main {
    width: 640px;
    float: left;
 }
 aside {
    background-color: #bbbbbb;
    width: 270px;
    float: right;
    padding: 20px;
    margin-top: 10px;
 }
footer {
    clear: both;
    background-color: #20416c;
    color:white;
    padding: 5px 20px;
}