.tube {
    width: auto;
    border-collapse: collapse;
    border: 1px solid #451a12;
    margin-bottom: 1em}

.tube th, .tube td {
    width: 8em;
    text-align: center;
    vertical-align: middle;
    padding: .2em;
    border: 1px solid #451a12;
    font-size: .83em}

.tube th {
    background: #c8cfbd}

.tube caption {
    font-weight: bold;
    caption-side: top;
    text-align: left}

.impnote {
    color: black}