The exact v13 (Tiffin) layout — only the color identity changes. Default theme is Cult.fit (black + electric lime #D4F33F), and the switcher above lets you cycle through three alternates: Swiggy (orange + green), Zepto (magenta + yellow), PhonePe (deep purple). Layout is locked; palette is liquid.
Each theme overrides the brand CSS variables at runtime. The punch hero band uses the theme's primary color, status chips use its secondary signal color. Selection persists in localStorage. Tap the white punch circle to see how each palette handles the active-state inversion.