Removing line spaces between lines in product descriptions

[daintybykate]

Hello 

How do I remove line spaces between lines in product descriptions, I know I need to insert some code I am just not too sure where. 

I am using the Impulse theme which I purchased. 

 I want all the lines to have no spacing as I have circled in red and they are only formatted this way because that's how it was formatted in my product CVS. But I want to add some more info I forget and there need to know how to format it correctly within Shopify.

This is what I can see from my code menu. 

I would seriously appreciate any help!

Thank you 

Kate

[SmallTask]

Hi @daintybykate ,

Kindly provide your store url.

[daintybykate]

daintybykate.com

[DelightCart]

@daintybykate Please send me store url and password.

[daintybykate]

daintybykate.com

password: hello

[SmallTask]

Hi @daintybykate ,

Add this CSS code
Online Store > Themes > Edit code > Assets > custom.css or theme.css

.rte p { margin-bottom: 10px; }

[daintybykate]

Under assets, I can't see either custom.css or theme.css so I've added that code to theme.css.liquid and theme.js as you can see in my screenshots down the bottom however neither has worked in stopping the space under each line.