/*-----------------------------------*\
  #KEYFRAME ANIMATIONS
  Shared animation definitions
\*-----------------------------------*/

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(200%); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
  50% { box-shadow: 0 0 35px var(--accent-glow), var(--glow-accent); }
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/*-----------------------------------*\
  #SCIENTIFIC ANIMATIONS
  Molecular and orbital-inspired motion
\*-----------------------------------*/

@keyframes orbital {
  0% { transform: rotate(0deg) translateX(10px) rotate(0deg); }
  100% { transform: rotate(360deg) translateX(10px) rotate(-360deg); }
}

@keyframes electron-flow {
  0% {
    opacity: 0;
    transform: translateX(-100%) scale(0.5);
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateX(100%) scale(0.5);
  }
}

@keyframes crystal-grow {
  0% {
    opacity: 0;
    transform: scale(0.8) rotate(-5deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

@keyframes bond-pulse {
  0%, 100% {
    opacity: 0.3;
    transform: scaleX(1);
  }
  50% {
    opacity: 0.6;
    transform: scaleX(1.02);
  }
}

@keyframes particle-drift {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  25% {
    transform: translate(5px, -10px) rotate(90deg);
  }
  50% {
    transform: translate(-5px, -20px) rotate(180deg);
  }
  75% {
    transform: translate(5px, -10px) rotate(270deg);
  }
}

@keyframes typewriter {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  50% { border-color: transparent; }
}

/*-----------------------------------*\
  #SCROLL REVEAL
  Intersection Observer animations
\*-----------------------------------*/

.reveal-init {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-init.animate-reveal {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children animation */
.reveal-init:nth-child(1) { transition-delay: 0.05s; }
.reveal-init:nth-child(2) { transition-delay: 0.1s; }
.reveal-init:nth-child(3) { transition-delay: 0.15s; }
.reveal-init:nth-child(4) { transition-delay: 0.2s; }
.reveal-init:nth-child(5) { transition-delay: 0.25s; }
.reveal-init:nth-child(6) { transition-delay: 0.3s; }
.reveal-init:nth-child(7) { transition-delay: 0.35s; }
.reveal-init:nth-child(8) { transition-delay: 0.4s; }

/* Fade up variant */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scale in variant */
@keyframes scale-in-fade {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}