I purchased a WordPress theme from Orgnanic Themes(who are no longer providing assistance) a few weeks ago and wanted to make a few minor changes(literally, all I did was replace images(header, slider prev/next buttons, background, footer, and the logo). In doing so, I went astray somewhere and messed up. I'm more of a designer than a developer so I'm at a complete loss now. How do I fix it?? Any help or advice would be greatly appreciated.

Original theme-
www . organicthemes . com/themes/block-theme/

My version-
www . whskytngfxtrt . com

W3 Validation Errors-
jigsaw . w3 . org/css-validator/validator?uri=http%3A%2F%2Fwww . whskytngfxtrt . com&profile=css21&usermedium=all&warning=1&vextwarning=&lang=en#css

(For whatever reason I was unable to insert my css in the forum, however it can be seen at the bottom of the W3 Validation.)


Again, any and all help would be greatly appreciated.