Part 9 Of Mastering Flexbox: Creating Responsive Columns Without CSS Grid

In Part 8 of our Mastering Flexbox series, we focused on controlling spacing with Gap instead of relying on margin for repeated spacing patterns. We saw how Horizontal Gap and Vertical Gap help create cleaner, more consistent spacing across rows, columns, and Module Groups.

Now, in Part 9, we’re focusing on another common responsive layout question: how do you create flexible multi-column sections without reaching for CSS Grid every time? CSS Grid is still the right tool for true two-dimensional layouts, especially when you need precise row and column placement, overlapping items, or highly irregular grid patterns. But for many