htmlpurifier/configdoc/styles/plain.css

table {border-collapse:collapse;}
table td, table th {padding:0.2em;}

table.constraints {margin:0 0 1em;}
table.constraints th {text-align:left;padding-left:0.4em;}
table.constraints td {padding-right:0.4em;}
table.constraints td pre {margin:0;}

#toc {list-style-type:none; font-weight:bold;}
#toc ul {list-style-type:disc; font-weight:normal;}