All solutions

As I'm progressing with my studies, my code is getting bigger and bigger, and I'm not sure if I'm organizing it in the best way, so some tips on this subject would be of great help and also if you find some way to optimize it would be very interesting.

Thank you all.

I had some trouble figuring out how to center proprely,

body{
min-height: 100vh;
display: grid;
place-content: center;
}

I'm not 100% though, and i have no clue about best pratices, so any hint I would appreciate it.