.container {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.aurora {
  position: absolute;
  inset: -50%;
  width: 200%;
  height: 200%;
  opacity: var(--aurora-intensity, 0.5);
  filter: blur(var(--aurora-blur, 100px));
  mix-blend-mode: screen;
}

.layer {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 80% 50% at 50% 50%,
    var(--aurora-color) 0%,
    transparent 70%
  );
  opacity: 0.6;
  animation: aurora-move var(--aurora-speed, 20s) ease-in-out infinite;
}

.layer1 {
  --aurora-color: var(--color-1, #00ff00);
  animation-delay: 0s;
  transform: rotate(0deg) scale(1.2);
}

.layer2 {
  --aurora-color: var(--color-2, #00ffff);
  animation-delay: calc(var(--aurora-speed, 20s) * -0.25);
  transform: rotate(60deg) scale(1.1);
}

.layer3 {
  --aurora-color: var(--color-3, #ff00ff);
  animation-delay: calc(var(--aurora-speed, 20s) * -0.5);
  transform: rotate(120deg) scale(1.3);
}

.layer4 {
  --aurora-color: var(--color-4, #00ff80);
  animation-delay: calc(var(--aurora-speed, 20s) * -0.75);
  transform: rotate(180deg) scale(1.15);
}

.layer5 {
  --aurora-color: var(--color-5, #8000ff);
  animation-delay: calc(var(--aurora-speed, 20s) * -0.33);
  transform: rotate(240deg) scale(1.25);
}

@keyframes aurora-move {
  0% {
    transform: translate(-30%, -30%) rotate(0deg) scale(1);
  }
  25% {
    transform: translate(30%, -20%) rotate(90deg) scale(1.1);
  }
  50% {
    transform: translate(20%, 30%) rotate(180deg) scale(1.05);
  }
  75% {
    transform: translate(-25%, 20%) rotate(270deg) scale(1.15);
  }
  100% {
    transform: translate(-30%, -30%) rotate(360deg) scale(1);
  }
}

/* Slower, more subtle variant */
.aurora.subtle .layer {
  animation-duration: calc(var(--aurora-speed, 20s) * 1.5);
}

/* Fast, more dynamic variant */
.aurora.dynamic .layer {
  animation-duration: calc(var(--aurora-speed, 20s) * 0.6);
}

/* Position variants */
.aurora.top {
  bottom: 50%;
  top: -50%;
}

.aurora.bottom {
  top: 50%;
  bottom: -50%;
}

.aurora.left {
  right: 50%;
  left: -50%;
}

.aurora.right {
  left: 50%;
  right: -50%;
}