KillerSharmaBot/Eat-Token ? reverse-engineered prompt

Build me a simple single page website that helps someone paste a Garena login callback URL and extract the EAT token from it, then show the generated access token response on the page. It should have a clean, easy to use layout, let the user choose a login provider like Google, Facebook, Apple, X, or VK, and include a big input area for the full callback URL. When they click generate, it should automatically pull out the token, display the result clearly, and let them copy the full response with one click. Add a short explanation of how to use it and a small warning that it is for educational and research purposes only. Make it lightweight, fast, and mobile friendly, and keep the design simple and polished. If you need to check anything about the current callback format, look up the latest docs online first.