bcit-ci/CodeIgniter ? reverse-engineered prompt

Build me a small website in CodeIgniter 3 that feels polished and easy to extend. I want a clean homepage, an about page, a contact form, and a simple admin area where I can view submitted messages and add or edit a few basic pages. Please use the normal CodeIgniter structure, with controllers, models, views, form validation, and database backed storage for the contact submissions.

Keep it simple, but make it look good and work end to end, with a responsive layout, navigation, flash messages, and sensible defaults. If anything important is unclear, use the latest CodeIgniter 3 docs online and make reasonable choices. I’m mainly after a working starter project that I can run locally and build on later, not a huge app.