Build single responsive page having 3 div

The page should be pure html and css with media query. There should not be any bootstrap or other library for responsive. The pages contain only 3 div as shown in image where div B and C should be max-width of 500px each. Div B and Div C can be shrink up to 350px smaller for each . When div A and B is less than 350px it should turn to tabs with 100% and div A turns to min-width 350px. Once Div A less than 350px or mobile view there should be burger menu for div A and other divs can be 100% width with tabs.