Transparent Background effecting Image's Transparency in Post

Hi there,

On my WordPress site I’ve set the two columns to be transparent, unluckily when I was coding the CSS, I changed a fair few values.

I then noted that the images in the individual posts were coming out transparent although I thought that I had left the individual image values untouched.

I was just wondering if any of you can check out my site and the code and let me know what I can do in order to sort out the individual images on the post’s transparency.
https://bit.ly/hFKMn9

Thanks in advance for any help you can provide,
Joebop