I already have a website with several well-designed pages; on the home page you can see the exact card-style layout I want to carry over into a new gallery section. The task is to create a dedicated page that displays both images and videos together in that same responsive grid, keeping thumbnails uniform so the flow feels seamless. When a visitor clicks any thumbnail the media should open in a lightbox overlay, with video playback or full-resolution image support depending on the item selected. Above the grid I’d like simple category buttons so users can filter the gallery without a full page reload; JavaScript filtering (Isotope, MixItUp, or vanilla JS) is fine as long as it’s smooth and accessible. Please reuse the site’s existing CSS variables and component classes where possible so the new page feels native, and write any additional CSS or JS in separate, clearly commented files for easy maintenance. If you prefer a framework—Bootstrap, Tailwind, or similar—let me know and we can align it with the current codebase. Deliverables: • Fully responsive gallery page replicating the home-page card style • Lightbox functionality for images and videos • Client-side category/filter controls integrated with the grid • Clean, commented HTML/CSS/JS files ready to drop into production I’ll supply the website address, current source files, and sample media as soon as we start.