[StGaensler]

I already posted an example css: https://vborg.vbsupport.ru/showpost....8&postcount=19
I know I spend more time writing my code than explaining it

Your code:

stg_table_transp {font-weight: large; }

contains some mistakes:

• "large" is not a valid property of font-weight - "bold" would be one
• to format a css class you need to add a point before the class name: .stg_table_transp
• You want to format the text in the table, not the table itself. Theoretically the property would inherit but the vBulletin css defines a format for the <td>-tag

So this will work:

.stg_table_transp td {font-weight:bold; }

If you want to format only a single row you will have to use the css class stg_tablerow_transp e.g. in this way:

.stg_tablerow_transp td {font-weight:bold; }