How can I adjust text size and color in Dawn theme product descriptions?

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In my store, 9 out of 15 of my product descriptions (info) are irregular in text size. It shows some points big and some super tiny but only 9 products. What is the code I need to enter to have all the text sizes be the same for all my product descriptions.

Another thing is the text color for the product descriptions, tried changing it all to black because it was grey but it ended up changing the white text in had for black background sections like my cart and footer text color to black. I changed it back but the product description text is still grey. How do change ONLY the product description text to black.