Responsive Snap Homepage with Dropdown navigation

It was quite challenging to get the right code for making a responsive off-canvas navbar using bootstrap. After a lot of trial and error, I was able to make it work. The navigation was meant to be a flex with a justify-content-space-between, However, due to the many customizations I had already done with bootstrap, a few mal-alignments occurred, so I decided to settle for having just the nav-brand to the left of the screen and the rest of the navigation to the right of the screen. For such a small file, I decided to use plain css instead of sass. Does industry standards have to always be sass regardless of the file size?