.ko-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: #02040a;
  z-index: 0;
  pointer-events: none;
}

.ko-bg::before {
  content: "";
  position: absolute;
  inset: -50%;
  background:
    radial-gradient(circle at 20% 40%, rgba(0, 140, 255, 0.2), transparent 40%),
    radial-gradient(circle at 50% 60%, rgba(0, 255, 120, 0.15), transparent 35%),
    radial-gradient(circle at 70% 50%, rgba(255, 210, 0, 0.12), transparent 35%),
    radial-gradient(circle at 85% 45%, rgba(255, 60, 60, 0.18), transparent 40%);
  filter: blur(80px);
  animation: koNebulaMove 40s ease-in-out infinite alternate;
  z-index: 1;
}

.ko-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(60deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(-60deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 104px;
  opacity: 0.15;
  animation: koHexDrift 60s linear infinite;
  z-index: 2;
}

.ko-stars {
  position: absolute;
  inset: 0;
  z-index: 3;
  background-image:
    radial-gradient(2px 2px at 20% 30%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1px 1px at 70% 60%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1.5px 1.5px at 40% 80%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 80% 20%, rgba(255, 255, 255, 0.3), transparent);
}

.ko-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(0, 255, 180, 0.08), transparent 60%);
  z-index: 2;
  animation: koPulse 8s ease-in-out infinite;
}

@keyframes koNebulaMove {
  0% {
    transform: translate(0%, 0%) scale(1);
  }
  50% {
    transform: translate(-5%, 3%) scale(1.05);
  }
  100% {
    transform: translate(5%, -3%) scale(1.1);
  }
}

@keyframes koHexDrift {
  0% {
    background-position: 0 0, 0 0;
  }
  100% {
    background-position: 200px 300px, -200px -300px;
  }
}

@keyframes koPulse {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}