Worked on the servo/stylo repository to address a critical rendering issue affecting CSS zoom behavior for font-size keywords. Focused on ensuring that font-size values specified via CSS keywords correctly respected the effective_zoom factor, the solution improved visual consistency across different zoom levels and font-size definitions. The approach involved refining the font-size calculation logic to apply the zoom factor accurately, reducing rendering glitches and supporting stable user interfaces in both embedded and headless environments. Utilized Rust for implementation, drawing on expertise in CSS and web rendering. Collaborated through code review to land the fix, enhancing reliability for downstream consumers.