Practice Portfolio white space to the right plus overlarge buttons

1

Hi I have this extra white space to the right of my practice portfolio, also my buttons on page 4 is overly large and I would like to make them smaller. Codepen

2 
.paddingBTN{
 /* padding-top:25%;
  padding-bottom:25%; */
  width:200%;
  margin-bottom:25%;
}

This is your code, you have to change this with width: 18%.