center align all text on mobile ECXEPT two blocks

Hello,

I used this code to center align all text on mobile:

@media only screen and (max-width: 767px) {
p, H1, H2, H3, H4 { text-align: center; }}

I have two text blocks I want to exclude from this rule (left alignment also on mobile). Is there any css to fix it?

Thank you very much!

If you target those text blocks (with block IDs) with text-align:left; below the centering CSS it will re-align the text left. 

CSS gets read and implemented by your browser from top to bottom, so if you set the text centered, and then set the same text left, it will keep the last one.