Do I need to reset styles in media queries for mobile devices?

Question

css

There are specific styles for full page viewing - from PCs, laptops.
And if using media queries to remove all sorts of shadows, rounding for mobile devices, will the same page load faster?

Answer 1

Pay attention to the file size. A couple of dozen properties will add a couple of hundred bytes to you, which at current connection speeds is equal to milliseconds, which is actually not significant.
The page will not load faster, that's for sure, but the FPS will not sag, or it will, but less, because the browser will no longer need to calculate all your shadows and rounding.

Answer 2

Если уж хочется заняться микрооптимизациями и пособирать крупицы производительности на мелочах (в принципе, почему бы и нет?) - лучше тогда делать по принципу mobile first.

Answer 3

Грузиться быстрее точно не будет. В лучшем случае получите небольшой прирост производительности.