v255

Changelog:

1. Merged the .dark-theme class with the media query for better organization and reduced redundancy in the CSS.
2. Adjusted the margin of the <h1> and <h2> elements to use var(--space-xs) for a more consistent spacing approach.
3. Removed the border property from the .btn-secondary class to simplify the button styling.
4. Updated the setupEventListeners method to use a more concise syntax for checking the style attribute changes with a single condition.
5. Enhanced the showResults method to improve readability by formatting the inner HTML of the results table more clearly.