custom CSS for multiple tables

i love your plugin but want to know how do i apply custom CSS to multiple tables across my entire site.

i have a site with 10 product pages. each page will have 3 different tables and each table will use the same custom CSS styling

currently all i know how to do it create the CSS 3 times for each page and change the ID #. below is the custom CSS for 1 single product page that uses table ID 2,3 & 4

is there a way to apply GLOBAL CSS to all my tables? if not ill have 3 different CSS styles replicated 10 times each

see below

.tablepress-id-2 tbody td {
font-size: 16px;
color: #505050;
}

.tablepress-id-3 tbody td {
font-size: 16px;
color: #505050;
}

.tablepress-id-4 tbody td {
font-size: 16px;
color: #505050;
}

The page I need help with: [log in to see the link]