Lucent Drift
Large out-of-focus orbs of colour wander slowly around the edges of the frame and blend where they meet, under a whisper of grain. Pure CSS, costs almost nothing.
Source & downloads
LucentDrift from @ngc/motion · ZIP with README, AI prompt and license. Premium: unlocked by one All-Access key ($9).
Source, AI prompt & downloads are locked
Unlock with your license key, or get All-Access: Backgrounds plus every other stack.