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Code Snippet

Conceptualize a reusable piece of UI that represents a 'Code Snippet' feature. This should be a component that clearly showcases blocks of code, potentially within a blog, documentation page, or a tutorial section.

Incorporate syntax highlighting to differentiate various elements like keywords, strings, and comments. The design should support language-specific themes and include line numbers for better readability.

Make sure to include options for users to copy the code easily and perhaps toggle line visibility. You could even consider features such as a dark/light mode toggle and the ability to expand or collapse sections of the code.

Consider the use of monospaced fonts to maintain uniform character width, ensuring that the code is neatly aligned and easy to read. A touch of subtle animation when copying code could delight the user!