* {
    box-sizing: border-box;
}

html {
    background-color: #eee;
}

body {
    width: 500px;
    margin: 50px auto;
    padding: 1em;

    font-family: Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6em;
}

@media (max-width: 768px) {
    body {
        margin-top: 1em;
    }
}

@media (min-width: 1200px) {
    body {
        width: 1100px;
    }

    .columns > section {
        width: 500px;
        display: inline-block;
        vertical-align: top;
    }

    .columns > section:nth-child(odd) {
        margin-right: 3rem;
    }
}

h1 {
    font-size: 1.5em;
}

h2 {
    margin-top: 2rem;
    font-size: 1.3em;
}


.image {
    display: table;
    width: 100%;

    background-color: #fff;
    padding: 1rem;
    margin: 1rem auto;
}

.image > div {
    display: table-cell;
    text-align: center;
    vertical-align: middle
}

footer {
    margin-top: 1rem;
    font-size: 0.7rem;
}

footer {
    margin-top: 1rem;
    font-size: 0.7rem;
}

.image-live {
    max-width: 100%;
    max-width: 468px;
}

.image-live-source {
    width: 100%;
}

.live-controls input {
    vertical-align: middle;
}
