Describe the bug
If in my theme-editor-styles.css I have the following:

button {
	box-shadow: 10px 5px 5px red;
	min-height: 2.5rem;
}

then havoc is wreaked on my editor.

Expected behavior
The styles above are exaggerated but I don't think styles on button or input elements are totally edge cases. #10067 (comment)

Possible solution
One fix that would need more testing is to unset styles on the Gutenberg specific class before styles are added.
So, for example, adding the following to the top of components/style.css fixed the button styles for me:

.components-button {
	all: unset;
}

This could be done for each class that Gutenberg applies to an html element other than div. Mostly button and input I would guess.

Desktop (please complete the following information):

• OS: Ubuntu
• Browser: chome, firefox
• Version: latest

Additional context

• Gutenberg v3.9