Design a button

As you can see in the preview


The button is standard, it is modified according to the browser and/or the operating system from which it is used.

Like #4 feel free to create a new .css file (remember add the old styles, delete from html and link the new style.css) or keep using inline style like right now in the .html

The button could be standard for white and dark mode or design two differents button for each design.

Try not to use any library or framework and make the code most optimized as possible