Show HN: Zen Mode – a global focus mode for macOS

Zen Mode is a macOS tool that creates a global focus mode across all applications using a single hotkey (Option + Cmd + Z). It centers the active window at full height while fading the Menu Bar, Dock, and other distractions to black, functioning like a spotlight effect rather than traditional full-screen mode. Unlike built-in zen modes in individual apps, this Hammerspoon script works universally across any macOS application with smooth animations and live window tracking.