Would love help trimming a code so that it won't exceed the character limit.

[TheBhatcave]

I would love some help in trimming a code so that it won't exceed the character limit on the Shopify custom css section when customizing my store. When I try to paste the code for the Shopify supported app " Buy Button" It shows that it exceeds the allowed 1500 character limit.

If anyone has any suggestions or comments please don't be hesitant in saying them, any help is appreciated. Thanks everyone in advance!