Issue: Missing Notebook Headers after Theme Customization

[abhdhar-1618]

Environment:

• Operating System: Windows 11
• Jupyter Version: 6.5.7
• Anaconda Version: 24.7.1
• Jupyter Themes Version: 0.20.0

Description of the Issue:

I encountered multiple issues while trying to customize my Jupyter Notebook theme using the jupyterthemes package. Specifically, the problems arise when I try to modify font sizes and apply other theme settings.

Initially, I ran the following working command:

bash

Copy code

jt -t monokai -fs 18 -m 200

This command successfully applied the Monokai theme, increased the font size to 18, and adjusted the margins. However, I noticed that after these modifications, the notebook header became invisible. This significantly impacted my workflow, as I rely on these headers for identification of the script I am working on.

Expected Behavior:

• The command jt -t monokai -fs 18 -m 200 should apply the theme without causing the notebook headers to disappear.

Actual Behavior:

• After applying the theme, the notebook headers disappear, making it difficult to interact with the notebook's interface.

Steps to Reproduce:

1. Run the following command in Anaconda Prompt to apply a theme:

   bash

   Copy code

   jt -t monokai -fs 18 -m 200

2. Observe that the notebook headers disappear after applying the theme.

Desired Improvements:

1. Restore Notebook Headers: After applying the theme, the headers should be visible and functional. This is critical for usability.

I would appreciate guidance on how to resolve the issue with the disappearance of the notebook headers.

Thank you for maintaining such a useful package, and I look forward to any updates or suggestions on this matter.

P.S:- I have attached the images of the before and after effects of the code execution.

Before theme change

After theme change

[abhdhar-1618]

@dunovank could you please look into this?

[abhdhar-1618]

@dunovank could you please look into this?