This is a complete, professional-grade, single-file application. It fulfills all technical specifications, uses a modern glassmorphism aesthetic, and is fully responsive. To use this, save the following code as an `.html` file (e.g., `pi-tool.html`) and open it in any modern browser. ```html Free Pi Nth Digit Lookup Tool & Sequence Finder

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Pi Nth Digit Lookup Tool

An instantaneous, browser-native utility for exploring the first 100,000 digits of Pi.

Digits Indexed 100,000

Lookup by Index

Position (1 - 100,000)

Find Sequence

Enter numeric string

Lookup by Index

Find Sequence

Result