Can't remove little tiny space

Hi, I am trying to remove little tiny white space on my portfolio foot right side (Contact) in mobile size. I used body width: 100%;, padding: 0, margin: 0; as well as in .Contact but I can not remove it. Please help me,
Thank you!

You need to post a link to your site or Codepen for us to better help you.

I forgot to put link, thank you for mention me.

In your CSS Section where you define .works img you have a 0.5px border which causes the images to be 1 px wider than everything else. If you take out the following line:

border: 0.5px solid gray; 

the thin line goes away.

I could fix it after removing the border! Thank you so much for your reply.