Possible legacy/unused code

[vihuna]

For the media query width <= 1050), the CSS selector (here) blockquote .sidenote (specifity 0-1-1) is never going to affect the width and margin-right of the sidenotes, because of the selector .sidenote-toggle:checked + .sidenote (here, with specificity 0-3-0), when the input is checked.

But when the input is not checked, the sidenote is not displayed (because media query width <= 1050)), so it doesn't makes much sense.

Also left: 1rem has no effect here, because the position is static.