#glowContainer {
  position: fixed;
  inset: 0;
  z-index: 0; 
  pointer-events: none;
  overflow: hidden;
}

.plus {
  position: absolute;
  width: var(--size, 60px);
  height: var(--size, 60px);
  transform: translate(-50%, -50%) scale(0.9);
  opacity: 0;
  filter: drop-shadow(0 0 8px rgba(255,255,255,0.7)) drop-shadow(0 0 15px rgba(255,255,255,0.4));
  animation: glowAnim var(--dur, 4s) ease-in-out forwards;
  mix-blend-mode: screen;
}

.plus::before,
.plus::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.9), transparent);
  border-radius: 2px;
}


.plus::before {
  width: calc(var(--size) * 0.7);
  height: 1px;
  box-shadow: 0 0 6px rgba(255,255,255,0.5);
}


.plus::after {
  height: calc(var(--size) * 0.7);
  width: 1px;
  box-shadow: 0 0 6px rgba(255,255,255,0.5);
}

@keyframes glowAnim {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.6);
    filter: blur(4px);
  }
  25% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
    filter: blur(1px);
  }
  70% {
    opacity: 0.9;
    transform: translate(-50%, -50%) scale(0.95);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.5);
    filter: blur(6px);
  }
}

@media (max-width: 640px) {
  .plus { --size: 40px; --dur: 3s; }
}