.datafiletextfield {
    margin-left: auto;
    margin-right: auto;
    display: block;
}

.datafile_caption {
    margin-bottom: -1px; /* to collapse border w/ below w/o needing border-bottom: none */
    margin-left: 1em;
    display: inline-block;
    padding: 0 0.2em;
    border: 1px solid #ccc;
    border-radius: 4px 4px 0 0;
    font-style: italic;
    background: white;
}
.datafile_caption code {
    background: none;
    border: none;
}
.datafile pre {
    /* for ease of setting height based on #rows */
    line-height: 1.5em;
    max-width: 100%;
    overflow: auto;
    white-space: pre;
    height: 30em;
}
.datafile_hidden {
    display: none;
}