html, body, h1, h2, h3, p, video {
    padding:0em;
    margin:0em;
}

body {
    margin:1em;
    max-width:550px;
}

h1,h2,h3,p {
    margin-bottom:0.5em;
}

.section {
    margin-left:1em;
}

.item {
    margin-bottom:0.5em;
    background-color:#eee;
    border-radius:1em;
    padding:1em;
}