update css file

Author: Shannon-ewingsudds-usace

data/README.md

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+# 📚 Library Management System
+
+A simple library book management system hosted on GitHub Pages with GitHub Actions.
+
+## Features
+- Check out / check in books
+- Search by Title, Author, or User
+- Data stored in `library.json` and `library.csv`
+- GitHub Actions automatically update data when users submit
+
+## Setup
+1. Fork/clone this repo.
+2. Replace `USERNAME/REPO` in `frontend/script.js` with your repo details.
+3. Add a GitHub token with `repo` scope.
+4. Enable GitHub Pages (serve `/frontend`).
+5. Commit and push — you’re live!