Mobile application for accounting work at a service station

PWA

Frontend:
- HTML5 — page structure
- CSS3 — appearance and styles
- JavaScript (vanilla) — application logic, without frameworks

Backend (server logic):
- Google Apps Script — server-side JavaScript within Google, processes requests and works with the spreadsheet

Database:
- Google Sheets — stores all data (records, directories, users)

Hosting:
- GitHub Pages

Vanilla HTML/CSS/JS + Google Apps Script + Google Sheets, hosted on GitHub Pages

More screenshots of this application can be found at the link https://drive.google.com/file/d/19pYQOppkDcRLjDtqx_88XJLTwnCRWFoS/view