Serene Sleep Sounds

This is a manual tool for mixing ambient sounds and guided breathing.

* Sound selection: Toggle rain, forest, ocean, and fire audio loops.
* Volume sliders: Independently adjust audio levels for each active loop.
* Breathing guide: Follow an animated visual prompt for inhale and exhale cycles.
* Sleep timer: Set a 15, 30, 45, or 60-minute countdown to stop audio.
* Interface design: Static deep-blue visual theme for low-light use.
* Offline operation: Access all features and audio loops without internet.
* Manual control: Stop all active sounds using a dedicated button.