I have gaps between divs,  it happens because I have following css rules
 it happens because I have following css rules
*, :after, :before {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
actually the reason is box-sizing property, the question is how to disable this rule only for parent div and cos I need this rule for all other elements?
With this configuration  it works, but after this I have a problem with all other elements
it works, but after this I have a problem with all other elements 
Here is code in fiddle https://jsfiddle.net/4j27tsdL/


 
     
     
    