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Hello david mora, how are you? I truly loved your project's outcome, however I have some advice that I hope you'll find useful:

A good practice to center content is using grid or flex-box, avoid using margin or padding to make placements, use only in the latter case! we can do it like this:

Flex-box:

body {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    min height: 100vh;
}

GRID

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

The remainder is excellent.

I hope it's useful. 👍