#turn-miasma-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  display: none; /* toggled by JS */
  overflow: hidden;
}

#turn-miasma-overlay::before {
  /* soft moving gradient band around edges (less transparent) */
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 0;
  /* stronger stops: increase alpha so the effect is more visible */
  background: radial-gradient(closest-side at 10% 10%, rgba(120,120,120,0.10), rgba(0,0,0,0) 30%),
              radial-gradient(closest-side at 90% 90%, rgba(120,120,120,0.10), rgba(0,0,0,0) 30%),
              linear-gradient(90deg, rgba(200,200,200,0.06), rgba(200,200,200,0.12) 50%, rgba(200,200,200,0.06));
  filter: blur(8px) saturate(0.7) brightness(0.93);
  mix-blend-mode: normal;
  transform: translateZ(0);
  animation: miasmaShift 5.5s linear infinite;
}

@keyframes miasmaShift {
  0% { transform: translateX(-4%); opacity: 1; }
  50% { transform: translateX(4%); opacity: 0.88; }
  100% { transform: translateX(-4%); opacity: 1; }
}

/* Additional pseudo-layer to create a cloudy / foggy texture */
#turn-miasma-overlay::after {
  content: '';
  position: absolute;
  /* extend slightly beyond edges so blur looks natural */
  inset: -12%;
  pointer-events: none;
  z-index: 9999;
  /* denser layered soft cloud blobs to emulate fog (more blobs, varied sizes/alphas) */
  background:
    radial-gradient(28% 18% at 8% 18%, rgba(255,255,255,0.12), rgba(255,255,255,0) 36%),
    radial-gradient(22% 14% at 22% 30%, rgba(250,250,250,0.10), rgba(255,255,255,0) 36%),
    radial-gradient(30% 20% at 40% 12%, rgba(245,245,245,0.09), rgba(255,255,255,0) 38%),
    radial-gradient(40% 28% at 60% 72%, rgba(245,245,245,0.11), rgba(255,255,255,0) 40%),
    radial-gradient(36% 26% at 78% 82%, rgba(250,250,250,0.10), rgba(255,255,255,0) 42%),
    radial-gradient(50% 35% at 50% 50%, rgba(250,250,250,0.08), rgba(255,255,255,0) 45%);
  filter: blur(28px) saturate(0.6) contrast(0.95);
  opacity: 0.96;
  transform: translateX(-6%);
  animation: cloudDrift 28s linear infinite;
  mix-blend-mode: normal;
}

@keyframes cloudDrift {
  0% { transform: translateX(-6%); }
  50% { transform: translateX(6%); }
  100% { transform: translateX(-6%); }
}