body { perspective: 1000px; }
#bgImage { will-change: transform, opacity; }
.option-press { transform: translateY(1px) scale(0.995); }
.result-pulse { animation: resultPulse 800ms ease-in-out both; }
@keyframes resultPulse {
  0% { transform: scale(.98); opacity:.9 }
  60% { transform: scale(1.02); opacity:1 }
  100% { transform: scale(1) }
}