body {
    margin: 0;
    padding: 0;
    background-color: #222;
    font-family: sans-serif;
}

video {
    max-width: 640px;
}

.page {
    /*             border: 4px solid blue; */
}

.row {
    display: inline-block;
    text-align: center;
    width: 100vw;
    min-width: 100vw;
    /*             border: 4px dashed yellow; */
}

.card {
    display: inline-block;
    margin: 0 auto;
    /*             border: 4px dotted red; */
}

.spacer {
    height: 30px;
}

h1 {
    color: #dadada;
}