Sparrow Photography is a simple, responsive photo gallery that displays a grid of images fetched from a remote API. The listing page uses a responsive CSS grid that adapts from two to four columns based on viewport width. Each photo is clickable and links to a detail page, where the selected image is shown with its title. Data is loaded asynchronously from a JSON API and cached in sessionStorage to speed up repeat visits. The gallery gracefully handles missing data or invalid photo IDs with a fallback message.