This depends also on your default table styles

div.tx-pdflist-pi1 table {

        margin-top: 2em;

        margin-bottom: 2em;

        font-size: 12px;

        width: 100%;

}

div.tx-pdflist-pi1 table {

        border: 1px solid #00335A;

}

div.tx-pdflist-pi1 table td, div.tx-pdflist-pi1 table th {

        border: 1px solid #00335A;

        padding: 2px;

}

div.tx-pdflist-pi1 table th {

        background-color: #DAD3BB

}

td.pdflist-catview-shortform {

        width: 5em;

}

td.pdflist-catview-filetitle {

        width: 35em;

}

td.pdflist-catview-revisiondate {

        width: 9em;

}