socat/doc/dest-unreach.css

table {
    empty-cells:      show;
}

.shell {
    display:          block;
    font-family:      Courier;
    padding:          6px;
    padding-top:      10px;
    padding-bottom:   4px;
    border:           3px  solid grey;
    color:            lightgreen;
    background-color: black;
    text-align:       left;
    white-space:      pre;
}

.error {
    display:          inline;
    block-size:       auto;
    font-family:      monospace;
    background-color: #e08080;
    border:           4px;
    padding:          2px;
    padding-right:    4px;
    border-style:     ridge;
    border-color:     #e08080;
}