table.logbook {
    border: 1px solid black;
    vertical-align: bottom;
    border-collapse: collapse;
}

.logbook th, td {
    font-family:    monospace;
    vertical-align: bottom;
    border-right: 1px solid black;
    padding-right: 0.5em;
}

.logbook tr:nth-child(odd) {
    background-color: #ddd;
}
    

tr.colnames {
    font-weight: bold;
    border: 1px solid black;
}