Tmbr Box Code Container

I need a simple, self-contained “tmbr box” where I (or any user) can type Goldiet code. At minimum the box must:

• Render cleanly inside a standard web page without external dependencies.
• Accept multiline input and let me programmatically read the contents so I can pass the text to my own backend later.
• Display the label “tmbr box” clearly so users know where to write their Goldiet code.

If you can add lightweight comforts—syntax colouring, tab indentation support, a compact toolbar—feel free to propose them, but keep the core solution lean and easy for me to drop into any HTML file.

Deliver the finished component as well-commented HTML + CSS + vanilla JavaScript (no build tools). A brief README that shows how to embed the file and access the typed text will complete the hand-off.