Worked on enhancing the Calc application’s dark mode user interface within the CollaboraOnline/online repository, focusing on both feature development and bug fixing. Delivered a new dark-mode-compatible icon for Notes and Comment actions, improving accessibility and visual consistency for users in low-light environments. Addressed a CSS issue where icons in the right-click menu were incorrectly inverted, refining the application of the invert filter to ensure correct icon rendering. Utilized CSS, JavaScript, and UI design skills to deliver these changes, which streamline the user experience, reduce visual friction, and contribute to a more accessible and maintainable front end in Calc.