div.container {
    width: 100%;
    border: 1px solid gray;
}

body {
    background-color: #f9f9f9;
}

header, footer {
    padding: 1em;
    color: white;
    background-color: #373737;
    clear: left;
    text-align: center;
}

nav {
    float: left;
    max-width: 160px;
    margin: 0;
    padding: 1em;
}

nav ul {
    list-style-type: none;
    padding: 0;
}
   
nav ul a {
    text-decoration: none;
}

article {
    margin-left: 170px;
    margin-right: 5px;
    margin-top: 5px;
    margin-bottom: 5px;
    border: 1px solid #373737;
    padding: 1em;
    overflow: hidden;
    border-radius: 5px;
    background-color: #f4f4f4;
}

article img {
    height: 100px;
    border: 1px solid #373737; 
    border-radius:5px;
    box-shadow: 4px 4px 5px 0px RGBA(50,50,50,0.75);
}