html, body {
    margin: 0;
    padding: 0;
    background: #eee;
}

body, body * {
    box-sizing: border-box;
    font-family: sans-serif;
}

.container {
    max-width: 700px;
    margin: auto;
    margin-top: 50px;
    background: white;
    padding: 20px;
    border: 1px solid #ccc;
    outline: 1px solid white;
}

header {
    text-align: center;
}

.content {
    border-top: 1px solid #ccc;
    padding: 20px;
}

.content .demo {
    padding: 20px 0;
    border-bottom: 1px solid #ccc;
}

.content .demo .component,
.content .demo .state {
    display: inline-block;
    width: 50%;
    vertical-align: top;
}