/* ====================================================
   🌌 3D AMBIENT OPEN STAR CLUSTER BACKGROUND
   Model: "Bright stars of an open cluster" by Salvatore Orlando
   Sketchfab: bc068b682f4243b2b702202a65df804d
   ==================================================== */

:root {
  --cosmic-bg: #05070F;
}

/* Background Ambient Container (Full Screen, Pointer-Events None) */
.cosmic-cluster-bg-wrapper {
  position: fixed;
  top: -6%;
  left: -6%;
  width: 112vw;
  height: 112vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background-color: var(--cosmic-bg);
  animation: cosmicClusterDrift 28s ease-in-out infinite alternate;
  will-change: transform;
}

.cosmic-cluster-bg-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
  outline: none;
  pointer-events: none;
  filter: contrast(1.12) brightness(1.05);
}

/* Contrast & Vignette Atmosphere Overlay */
.cosmic-cluster-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 35%, rgba(5, 7, 15, 0.35) 0%, rgba(5, 7, 15, 0.78) 65%, #05070F 100%);
}

/* Smooth Weightless Multi-Axis Organic Float */
@keyframes cosmicClusterDrift {
  0% {
    transform: translate3d(0, 0, 0) scale(1) rotate(0deg);
  }
  33% {
    transform: translate3d(-18px, 14px, 0) scale(1.03) rotate(0.8deg);
  }
  66% {
    transform: translate3d(16px, -18px, 0) scale(1.05) rotate(-0.6deg);
  }
  100% {
    transform: translate3d(-10px, -12px, 0) scale(1.02) rotate(0.4deg);
  }
}

/* Micro Sketchfab Model Attribution */
.cosmic-cluster-credit {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 0.04em;
  margin-top: 8px;
}
.cosmic-cluster-credit a {
  color: rgba(245, 166, 35, 0.7);
  text-decoration: none;
  transition: color 0.2s ease;
}
.cosmic-cluster-credit a:hover {
  color: #F5A623;
  text-decoration: underline;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .cosmic-cluster-bg-wrapper {
    top: -8%;
    left: -8%;
    width: 116vw;
    height: 116vh;
    animation-duration: 22s;
  }
}

/* Respect Reduced Motion Preferences */
@media (prefers-reduced-motion: reduce) {
  .cosmic-cluster-bg-wrapper {
    animation: none !important;
  }
}