#container, #container2 {
    width: 500px;
    margin: 0 auto;
    height: 500px
}

#container div, #container2 div {
    width: 40%;
    margin: 2%;
    padding: 2%;
    float: left;
    height: 200px;
    background-color: #ccc;
}

#container div.selected, #container2 div.selected {
    background-color: #FFB600;
}

#outer {
    width: 300px;
    height: 300px;
    padding: 50px;
    background: #E38F90;
}

#inner {
    width: 200px;
    height: 200px;
    background: #F00;
}

h1 {
    background: #222;
    color: white;
    padding: 20px;
}