Supernova light echo expands as a radiant wave across space

16:9, do this for supernova light echo :root {      --subject: "$propagating signal"; /*  d, Supernova light echo */     --medium: "AI_inferred transmission medium"; }  # canvas {     background: radial-gradient(circle at left center, # ffffff, # 0a0a0a); }  # subject_render {     layout: "A radiant beam expanding from a precise source on the left.";     render-source: "Far left: The signal origin as a hyper-detailed technical drawing — a synapse with vesicles, a router antenna with PCB traces, a tweet with metadata, a star going supernova with spectral lines.";     render-propagation: "The signal travels rightward as a luminous wavefront. At first it is abstract: wave equations, amplitude modulation math, SIR model differential equations, light cone diagrams.";     render-impact: "Far right: The signal fully arrived, rendered as a cinematic photograph — a person wincing, a video playing on a phone, a retweet cascade visualized as real phones lighting up, a nebula glowing from a millennia-old shockwave.";     transition: "The beam itself changes from a mathematical wave packet to a physical glow. The equation 'I = V/R' becomes a real spark."; }