Combustion chemistry to photoreal flames in a 2x2 grid

2x2 grid, 16:9, AI inferred topics that are not in the example: :root {     --subject: "$combustion process"; /* e.g. Candle flame, Rocket engine preburner, Forest fire, Diesel combustion in cylinder */     --representation: "Chemical kinetics to visible flame"; }  # canvas {     background: # 0d0d0d; }  # subject_render {     mask-image: none;     render-left-side: "Pure combustion chemistry: Arrhenius equation, chain branching reactions diagram, fuel/oxidizer mixture fraction space, adiabatic flame temperature calculation, radical pool concentrations, all in spectral lines on a blackboard.";     render-center: "The flame structure resolving: temperature profile with thin reaction zone, species mass fractions crossing the flame sheet, soot inception and growth pathways, Schlieren imaging representation, flamelet model stretching.";     render-right-side: "Photoreal physical flame: candle with blue/white/yellow zones and soot trail, rocket preburner with glowing injector face and hot gas streaks, forest fire with ember and heat shimmer, diesel spray combustion with luminous soot radiation, all with real-world texture and heat glow.";     transition-zone: "OH* radical concentration becoming visible violet glow. Fuel droplets transitioning from phase diagram to real evaporation."; }