Synthwave, fireflies, snow, sakura, nebula: CSS/SVG. Matrix and
constellation: canvas. Existing engines gain depth, color, glow, and
parallax (mouse and device tilt, opt-in on iOS)
Locked items show a progress bar until the goal is reached. Four
CSS-only skins (Pastel, Retro CRT, Cyberpunk, Steam) in skins.css,
light and dark. A skin overrides accent and corners; badges, borders,
frames, effects and game art stay on top. New Platinum shine and
Equalizer effects.