Media queries breakpoints are destroyed or what?

Question

Anyone knows why whenever I set my media query to any value, website does not read this properly? It means that... neither @media (max-width: 768px) nor @media screen and (max-width: 768px) doesn't work...
My brackets reads this like "OH! OK!!! SO YOU WANT ME TO DO SOMETHING UP TO 615PX, NO PROBLEM MY BROTHER!!!".
You know what I mean? I want to set breakpoint up to 768px but website do this up to 615px and that's the problem... (the problem occurs with any other pixel values)

Answer 1

sent me your code