Here's a complete example of a simple, colorful, responsive audio recorder tool using HTML, CSS, and JavaScript. This tool will allow users to record audio, stop the recording, play it back, and download the audio file. We'll use the `MediaRecorder` API, which is widely supported in modern browsers. For this example, I’ll add a few styles for a colorful UI and animations. We don’t need an external library, as native JavaScript handles the recording and playback functionality well. ### HTML, CSS, and JavaScript Code ```html

Audio Recorder Tool

``` ### Explanation of the Code 1. **HTML Structure**: We have a `div` container with buttons for recording, stopping, playing, and downloading audio. An `