Hide Excerpt but Not Post Text

https://www.eastemeraldphotography.com

Having trouble hiding the excerpt under the title of the grid posts – but keeping the text in the post once you click through.
I just want titles with no content or preview content under, then you click on a picture or title and it will take you to the post that is full of text/pictures.

apparently there is a simple css code I can just throw in there but I can’t figure out what it is that wont hide all post content!

Thanks

theme is rosemary from solo pine