JoelShine/Blaze-the-Calculator ? reverse-engineered prompt

Build me a simple desktop calculator app in Python with a clean Tkinter interface, similar to a basic handheld calculator.

I want it to open in a small window, have a number display, and include buttons for the usual operations like add, subtract, multiply, divide, clear, and equals. It should feel polished and easy to use, not like a barebones demo. If it makes sense, match the look and feel of the screenshot style in the repo, and use the included image or gif as inspiration for the layout.

Please make sure it handles normal calculator input smoothly, including decimal numbers and basic error cases like divide by zero, without crashing. Keep the code simple and readable so I can run it directly from one Python file. If you need to check anything about current Tkinter best practices, feel free to look it up online first.