if you use box-shadow on hover instead of making the bottom and right borders thicker (i.e. `box-shadow: 2px 2px 0px 2px black;`), the list won't shift every ti

if you use box-shadow on hover instead of making the bottom and right borders thicker (i.e. `box-shadow: 2px 2px 0px 2px black;`), the list won't shift every time you hover on something