Describe the bug

context
When dark mode is toggled, the "show/hide code cell output" button's text is updated to a light color, but the background stays light, making the text nearly impossible to see.

expectation
The "show/hide code cell output" text should turn light while the background should turn dark.

bug
But instead the background stays the same color.

problem
The "show/hide code cell output" text is now impossible to see on top of the light background. Furthermore, the light background of the "show/hide code cell output" strip severely contrasts against the overall dark background.

Reproduce the bug

I noticed this issue when building the documentation for my personal project. Here's a rendered version clearly showing the issue: https://bbye98.github.io/minim/guides/qobuz.html

List your environment

❯ conda -V
conda 23.5.0

❯ python3 -V
Python 3.9.16

❯ conda list myst-nb
# packages in environment at /home/bye/miniconda3/envs/minim:
#
# Name                    Version                   Build  Channel
myst-nb                   0.17.2             pyhd8ed1ab_0    conda-forge