glow-logo Test bench

WebGL2 fire off the mark's alpha channel

The mark above is the crisp SVG layer; the fire is a shader running behind it. The ramp is tunable with --glow-outer, --glow-mid and --glow-core , and size with the element's width. It respects reduced motion, idles off screen and falls back to a CSS drop-shadow when WebGL2 is unavailable.