/* ==========================================================================
   VRINDA INFOTECH - KEYFRAME ANIMATIONS & SCROLL REVEALS
   Performance-optimized 60fps transitions
   ========================================================================== */

/* --------------------------------------------------------------------------
   Keyframes
   -------------------------------------------------------------------------- */
@keyframes pulseGlow {
  0%, 100% {
    transform: scale(1);
    opacity: 0.8;
    box-shadow: 0 0 10px var(--accent-cyan);
  }
  50% {
    transform: scale(1.3);
    opacity: 1;
    box-shadow: 0 0 20px var(--accent-cyan), 0 0 30px rgba(0, 240, 255, 0.4);
  }
}

@keyframes floatSlow {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-12px) rotate(1.5deg);
  }
}

@keyframes rotate3DFallback {
  0% {
    transform: rotateX(20deg) rotateY(0deg);
  }
  50% {
    transform: rotateX(45deg) rotateY(180deg);
  }
  100% {
    transform: rotateX(20deg) rotateY(360deg);
  }
}

@keyframes shimmerWave {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes laserLine {
  0% {
    transform: translateX(-100%);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translateX(100%);
    opacity: 0;
  }
}

@keyframes spinLoader {
  to {
    transform: rotate(360deg);
  }
}

/* --------------------------------------------------------------------------
   Scroll Reveal Transition Classes (Intersection Observer)
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(35px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

/* Stagger Delays */
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }
.delay-600 { transition-delay: 0.6s; }

/* --------------------------------------------------------------------------
   Accessibility (Prefers Reduced Motion)
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1 !important;
    transform: none !important;
  }
}