I have an existing Google Sheet that already captures the core data for my project. What I now need is a lightweight web app—built in HTML, CSS and JavaScript (or Google Apps Script HTML Service)—that connects to this sheet for real-time reading and writing. Here is how I picture the flow: • A clean, responsive front-end form where users can enter or edit records. • Direct integration with the current Google Sheet via Apps Script, the Sheets API, or whichever approach you find most efficient. • Basic navigation that lets me expand later into dashboards or reports. You will work alongside me, sharing code in a version-controlled space (GitHub or similar) so we can iterate quickly. I can supply the Sheet structure, sample data and access credentials as soon as we start. Acceptance criteria • Users can submit a form, and the data lands in the correct rows/columns. • Existing rows can be fetched and displayed for editing. • All front-end interactions remain functional on desktop and mobile. If you have solid Google Apps Script, JavaScript or front-end chops and enjoy collaborative, incremental builds, let’s get started—I’m ready to give quick feedback and keep the project moving.