.content {
    text-align: center;
}

container ul {
    margin: 20px;
    display: inline-block;
}

container li {
    float: left;
    min-width: 220px;
    min-height: 200px;
    padding: 20px;
    margin: 20px;
    box-shadow: 2px 4px 6px 2px rgba(0,0,0,.2);
    overflow: auto;
}

container h4 {
    font-size: 28px;
    padding: 10px;
}