Hello, i added border-box to * element, height: 100vh to html, body element and height: 100% to container element in solution.css. But still, i have a small vertical scrolling and if i remove 4 px gap. The problem solved. So, does border-box behave differently here for gap in grid and how to fix it? And i know using fix height is not a good thing but, in this context should it be a problem that much? If answer is yes, how? Thank you for your answers.