How to make posts fir the width of the screen in Pinbin theme?

Hi Aigars, great job with the theme! Just one question, how can all the post fill the width of the screen, with my resolution I can see 3 posts and a lot of empty space on the right and left sides. Can you help me with this?? Thank you!!

Theme will automatically add extra post on the right side when it has enough space on the right – 300px. Otherwise it will show blank space there because another post won’t be able to fit.
There shouldn’t be any blank space on the lext except tiny gap. It should as far from the left as the logo in the header navigation.
You can reduce that left side gap by looking for

Inside style.css located in the theme folder and reduce

to 1 or 2 percent. It will reduce the left side margin.