Column width in Table

Hi,

i want to add a table to the website with several colums. The first column is the most important because of the description of items (the other colums only contain one number to show how much of the items mentioned in the first column are in the set). So the first column needs more space than the other columns do.

I have enabled the custom class field with this code:

add_theme_support(‘avia_template_builder_custom_css’);

which worked well.

Now i tried to affect the column width by adding a code block below the table using:

.page-id-63 td:first-child {
min-width: 250px;
}

I also have tried a larger amount of px but noting seems to happen. Could you provide another CSS Code which might work?