fix: reduce javadoc logo height to prevent navbar overflow

[sunJ0120]

What problem does this PR solve?

Fixes #154 - Logo in javadoc navbar was overflowing due to height: 100%

Why height: 100% didn't work:
The logo's direct parent is .about-language, not .top-nav, so 100% referenced an intermediate parent without explicit height. This caused the logo to render at its original image size, exceeding the navbar bounds.

Why calc(0.8 * var(--top-nav-height)) fixes it:

• Directly references the navbar height CSS variable
• 0.8 multiplier provides appropriate visual spacing (~80% of navbar height)
• More stable and maintainable than font-size relative units like em

Changes

Modified pom.xml to change logo height from 100% to calc(0.8 * var(--top-nav-height)) in the javadoc header configuration.

Testing

• Tested in Chrome DevTools on the deployed documentation page
• Logo scales appropriately with navbar height
• Visual balance maintained with proper spacing

Screenshots

Before: Logo extends beyond navbar

After: Logo contained within navbar

Thanks to @Marcono1234 for suggesting the CSS variable approach!

Fixes #154

[Marcono1234]

Thanks for taking up the issue I had reported!

I am wondering if there is a way to make the height: 100% work again, to me that feels like the most proper approach. Though I am not familiar enough with CSS myself to understand why it broke or how to fix it.

Using height: 2em as you propose here feels a bit brittle, and might break in the future again. Maybe a bit more stable approach would be something like height: calc(0.8 * var(--top-nav-height)).

Or just removing the logo entirely for now if there is no way to reliably display it at the moment?

These are just my personal thoughts about this though. I am not a member of this project.

[sunJ0120]

Thanks! You're right - em is unstable.

height: calc(0.8 * var(--top-nav-height)) is much better - uses the existing CSS variable and won't break with future changes.

Re: why height: 100% didn't work - the logo's parent is .about-language, not .top-nav,
so 100% references the wrong container. We could fix this by adding height: 100% to .about-language, but the 0.8 multiplier gives better visual spacing anyway.

Works great! 👍