/* ============================================
   AMTWIC - Cinematic 3D Loader
   Premium loading experience with depth and lighting
   ============================================ */

.amtwic-loader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  background: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  pointer-events: none;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.amtwic-loader.loaded {
  opacity: 0;
  visibility: hidden;
}

/* Atmospheric background */
.loader-atmosphere {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 40% at 50% 40%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse 40% 30% at 30% 60%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 35% 25% at 70% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
  animation: atmospherePulse 8s ease-in-out infinite;
}

/* Particle grid effect */
.loader-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.5;
  animation: gridFade 2s ease-in-out;
}

/* Logo container with 3D perspective */
.loader-logo-container {
  position: relative;
  perspective: 1000px;
  perspective-origin: 50% 50%;
  z-index: 10;
}

/* Main logo wrapper */
.loader-logo {
  position: relative;
  display: flex;
  gap: clamp(0.5rem, 2vw, 1.5rem);
  align-items: center;
  justify-content: center;
  transform-style: preserve-3d;
  animation: logoEntrance 2s ease-out forwards;
}

/* Individual letter styling */
.loader-letter {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  color: #ffffff;
  text-shadow:
    0 0 20px rgba(59, 130, 246, 0.6),
    0 0 40px rgba(59, 130, 246, 0.4),
    0 0 60px rgba(59, 130, 246, 0.2);
  opacity: 0;
  transform: translateZ(-100px) rotateY(-30deg);
  animation: letterReveal 0.6s ease-out forwards;
  position: relative;
}

/* Staggered animation delays for each letter */
.loader-letter:nth-child(1) { animation-delay: 0.2s; }
.loader-letter:nth-child(2) { animation-delay: 0.3s; }
.loader-letter:nth-child(3) { animation-delay: 0.4s; }
.loader-letter:nth-child(4) { animation-delay: 0.5s; }
.loader-letter:nth-child(5) { animation-delay: 0.6s; }
.loader-letter:nth-child(6) { animation-delay: 0.7s; }

/* Letter depth effect */
.loader-letter::before {
  content: attr(data-letter);
  position: absolute;
  left: 2px;
  top: 2px;
  color: rgba(59, 130, 246, 0.3);
  text-shadow: none;
  z-index: -1;
  transform: translateZ(-10px);
}

/* Light sweep effect */
.loader-sweep {
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  animation: sweep 2s ease-in-out 1s forwards;
  transform: skewX(-20deg);
  pointer-events: none;
}

/* Tagline */
.loader-tagline {
  position: absolute;
  bottom: -3rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'Poppins', sans-serif;
  font-size: clamp(0.75rem, 2vw, 0.875rem);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0;
  animation: taglineFade 1s ease-in 1.2s forwards;
  white-space: nowrap;
}

/* Animated glow particles */
.loader-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.loader-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: rgba(59, 130, 246, 0.6);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 4s ease-in-out infinite;
}

.loader-particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; }
.loader-particle:nth-child(2) { left: 25%; top: 60%; animation-delay: 0.5s; }
.loader-particle:nth-child(3) { left: 50%; top: 30%; animation-delay: 1s; }
.loader-particle:nth-child(4) { left: 75%; top: 70%; animation-delay: 1.5s; }
.loader-particle:nth-child(5) { left: 85%; top: 40%; animation-delay: 2s; }
.loader-particle:nth-child(6) { left: 40%; top: 80%; animation-delay: 2.5s; }

/* ============================================
   Keyframe Animations
   ============================================ */

@keyframes atmospherePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes gridFade {
  0% { opacity: 0; }
  50% { opacity: 0.5; }
  100% { opacity: 0.2; }
}

@keyframes logoEntrance {
  0% {
    transform: translateZ(-200px) rotateX(15deg);
    opacity: 0;
  }
  100% {
    transform: translateZ(0) rotateX(0deg);
    opacity: 1;
  }
}

@keyframes letterReveal {
  0% {
    opacity: 0;
    transform: translateZ(-100px) rotateY(-30deg) translateY(20px);
  }
  60% {
    transform: translateZ(10px) rotateY(5deg) translateY(-5px);
  }
  100% {
    opacity: 1;
    transform: translateZ(0) rotateY(0deg) translateY(0);
  }
}

@keyframes sweep {
  0% {
    left: -100%;
  }
  100% {
    left: 150%;
  }
}

@keyframes taglineFade {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
  }
  100% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes particleFloat {
  0%, 100% {
    opacity: 0;
    transform: translateY(0) scale(1);
  }
  10% {
    opacity: 0.6;
  }
  50% {
    opacity: 0.8;
    transform: translateY(-30px) scale(1.2);
  }
  90% {
    opacity: 0.4;
  }
}

/* ============================================
   Responsive Adjustments
   ============================================ */

/* Tablet and smaller */
@media (max-width: 768px) {
  .loader-logo {
    gap: clamp(0.3rem, 1.5vw, 0.75rem);
  }

  .loader-letter {
    font-size: clamp(2rem, 10vw, 3.5rem);
  }

  .loader-tagline {
    bottom: -2.5rem;
    font-size: 0.7rem;
  }

  .loader-grid {
    background-size: 30px 30px;
  }
}

/* Mobile optimization - reduce effects */
@media (max-width: 480px) {
  .loader-atmosphere {
    animation: none;
    opacity: 0.8;
  }

  .loader-particles {
    display: none; /* Remove particles on mobile for performance */
  }

  .loader-letter {
    font-size: clamp(1.75rem, 12vw, 3rem);
    text-shadow:
      0 0 15px rgba(59, 130, 246, 0.5),
      0 0 30px rgba(59, 130, 246, 0.3);
  }

  .loader-letter::before {
    display: none; /* Simplify depth on mobile */
  }
}

/* ============================================
   Reduced Motion Support
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .amtwic-loader,
  .loader-atmosphere,
  .loader-grid,
  .loader-logo,
  .loader-letter,
  .loader-sweep,
  .loader-tagline,
  .loader-particle {
    animation: none !important;
    transition: none !important;
  }

  .amtwic-loader {
    transition: opacity 0.2s ease !important;
  }

  .loader-logo,
  .loader-letter,
  .loader-tagline {
    opacity: 1 !important;
    transform: none !important;
  }

  .loader-particles {
    display: none;
  }
}

/* ============================================
   Fallback for older browsers
   ============================================ */

/* If CSS transform-style is not supported */
@supports not (transform-style: preserve-3d) {
  .loader-logo {
    transform-style: flat;
  }

  .loader-letter {
    transform: none;
    animation: letterFade 0.6s ease-out forwards;
  }

  @keyframes letterFade {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
}

/* Print styles - hide loader */
@media print {
  .amtwic-loader {
    display: none !important;
  }
}