fix: image link

Update UI picture

format

style: change the look of non-&pressed buttons

Fix: BG color resetting on gridsize changes

feat: option to choose background color

Feat: Add a max length to the hex input

Update the picture to the latest UI changes

Use boolean values instead of class toggling

Minify some parts of the code

Feat: Improve performance

Increase box-shadow size for better visibility

Fix: box-shadow not working on safari

Feat: Make it clear which button is clicked

Fix: grid-size issue when the slider value changes