chunhuynh/password-generator ? reverse-engineered prompt

Build me a simple random password generator website with plain HTML, JavaScript, and CSS.

I want a clean page where someone can choose the password length, turn on or off uppercase letters, lowercase letters, numbers, and special characters, then generate a random password instantly. It should also have a copy to clipboard button so the user can easily reuse the result.

Please make the interface feel polished and easy to use, and use custom web components for the slider and checkboxes if that fits. The password generator should be easy to read and test, and if you need to look up current browser support or best practices online, feel free to do that.

This is a learning project, so keep it straightforward, but make sure the generated password updates properly when the options change and the copy button gives clear feedback when it works.