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

/* Loading Animations */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

@keyframes flow {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

@keyframes typewriter {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}

@keyframes dots {
  0%, 20% {
    content: '';
  }
  40% {
    content: '.';
  }
  60% {
    content: '..';
  }
  80%, 100% {
    content: '...';
  }
}

/* Text Animations */
@keyframes blink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}

@keyframes glitch-1 {
  0%, 100% {
    transform: translate(0);
  }
  20% {
    transform: translate(-2px, 2px);
  }
  40% {
    transform: translate(-2px, -2px);
  }
  60% {
    transform: translate(2px, 2px);
  }
  80% {
    transform: translate(2px, -2px);
  }
}

@keyframes glitch-2 {
  0%, 100% {
    transform: translate(0);
  }
  20% {
    transform: translate(2px, -2px);
  }
  40% {
    transform: translate(2px, 2px);
  }
  60% {
    transform: translate(-2px, -2px);
  }
  80% {
    transform: translate(-2px, 2px);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0) translateX(-50%);
  }
  40% {
    transform: translateY(-10px) translateX(-50%);
  }
  60% {
    transform: translateY(-5px) translateX(-50%);
  }
}

/* Floating Animation */
@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  33% {
    transform: translateY(-10px) rotate(2deg);
  }
  66% {
    transform: translateY(5px) rotate(-2deg);
  }
}

/* Gradient Animation */
@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Scale Animation */
@keyframes scale-in {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Slide Animations */
@keyframes slide-up {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slide-down {
  0% {
    opacity: 0;
    transform: translateY(-30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slide-left {
  0% {
    opacity: 0;
    transform: translateX(30px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slide-right {
  0% {
    opacity: 0;
    transform: translateX(-30px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Rotation Animations */
@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes rotate-y {
  0% {
    transform: rotateY(0deg);
  }
  100% {
    transform: rotateY(360deg);
  }
}

/* Matrix Rain Animation */
@keyframes matrix-rain {
  0% {
    transform: translateY(-100vh);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(100vh);
    opacity: 0;
  }
}

/* Neon Glow Animation */
@keyframes neon-glow {
  0%, 100% {
    box-shadow: 
      0 0 5px var(--primary),
      0 0 10px var(--primary),
      0 0 15px var(--primary);
  }
  50% {
    box-shadow: 
      0 0 10px var(--primary),
      0 0 20px var(--primary),
      0 0 30px var(--primary);
  }
}

/* Progress Bar Animation */
@keyframes progress-fill {
  0% {
    width: 0%;
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}

/* Typing Effect Animation */
@keyframes typing {
  0% {
    width: 0;
  }
  100% {
    width: 100%;
  }
}

/* Code Block Animation */
@keyframes code-highlight {
  0% {
    background: transparent;
  }
  50% {
    background: rgba(0, 212, 255, 0.1);
  }
  100% {
    background: transparent;
  }
}

/* Particle Animations */
@keyframes particle-float {
  0%, 100% {
    transform: translateY(0px) translateX(0px) rotate(0deg);
    opacity: 0.7;
  }
  25% {
    transform: translateY(-20px) translateX(10px) rotate(90deg);
    opacity: 1;
  }
  50% {
    transform: translateY(-10px) translateX(-10px) rotate(180deg);
    opacity: 0.8;
  }
  75% {
    transform: translateY(-30px) translateX(5px) rotate(270deg);
    opacity: 0.9;
  }
}

/* Network Connection Animation */
@keyframes network-pulse {
  0%, 100% {
    stroke-dashoffset: 100;
    opacity: 0.3;
  }
  50% {
    stroke-dashoffset: 0;
    opacity: 1;
  }
}

/* Holographic Effect */
@keyframes holographic {
  0%, 100% {
    background-position: 0% 50%;
    filter: hue-rotate(0deg);
  }
  25% {
    background-position: 100% 50%;
    filter: hue-rotate(90deg);
  }
  50% {
    background-position: 50% 100%;
    filter: hue-rotate(180deg);
  }
  75% {
    background-position: 50% 0%;
    filter: hue-rotate(270deg);
  }
}

/* ========================================
   Animation Classes
======================================== */

/* Fade Animations */
.fade-in {
  animation: scale-in 0.6s ease-out forwards;
}

.fade-in-delay-1 {
  animation: scale-in 0.6s ease-out 0.2s forwards;
  opacity: 0;
}

.fade-in-delay-2 {
  animation: scale-in 0.6s ease-out 0.4s forwards;
  opacity: 0;
}

.fade-in-delay-3 {
  animation: scale-in 0.6s ease-out 0.6s forwards;
  opacity: 0;
}

/* Slide Animations */
.slide-up {
  animation: slide-up 0.8s ease-out forwards;
}

.slide-down {
  animation: slide-down 0.8s ease-out forwards;
}

.slide-left {
  animation: slide-left 0.8s ease-out forwards;
}

.slide-right {
  animation: slide-right 0.8s ease-out forwards;
}

/* Hover Animations */
.hover-lift {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.hover-glow {
  transition: all var(--transition-normal);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
  transform: scale(1.05);
}

.hover-rotate {
  transition: transform var(--transition-normal);
}

.hover-rotate:hover {
  transform: rotate(5deg);
}

/* Loading States */
.loading-skeleton {
  background: linear-gradient(90deg, 
    rgba(255, 255, 255, 0.1) 25%, 
    rgba(255, 255, 255, 0.2) 50%, 
    rgba(255, 255, 255, 0.1) 75%
  );
  background-size: 200% 100%;
  animation: gradient-shift 1.5s infinite;
  border-radius: var(--radius-md);
}

/* Parallax Scrolling */
.parallax {
  transform: translateZ(0);
  will-change: transform;
}

/* Smooth Transitions */
.smooth-transition {
  transition: all var(--transition-normal);
}

.smooth-transition-slow {
  transition: all var(--transition-slow);
}

/* Performance Optimizations */
.gpu-accelerated {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

.will-change-transform {
  will-change: transform;
}

.will-change-opacity {
  will-change: opacity;
}

/* ========================================
   Intersection Observer Animations
======================================== */

/* Elements start hidden and animate in when visible */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.animate-on-scroll.in-view {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.slide-left {
  transform: translateX(-30px);
}

.animate-on-scroll.slide-left.in-view {
  transform: translateX(0);
}

.animate-on-scroll.slide-right {
  transform: translateX(30px);
}

.animate-on-scroll.slide-right.in-view {
  transform: translateX(0);
}

.animate-on-scroll.scale {
  transform: scale(0.8);
}

.animate-on-scroll.scale.in-view {
  transform: scale(1);
}

/* Staggered Animations */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* ========================================
   Advanced Effects
======================================== */

/* Glassmorphism */
.glass {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Neumorphism */
.neuro {
  background: var(--dark-secondary);
  box-shadow: 
    20px 20px 60px var(--dark),
    -20px -20px 60px rgba(255, 255, 255, 0.05);
}

/* Text Gradient */
.text-gradient {
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 200%;
  animation: gradient-shift 3s ease infinite;
}

/* Border Gradient Animation */
.border-gradient {
  position: relative;
  background: var(--dark-secondary);
  border-radius: var(--radius-xl);
}

.border-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  padding: 2px;
  background: var(--gradient-primary);
  border-radius: inherit;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  animation: gradient-shift 2s ease infinite;
}

/* Matrix Digital Rain */
.matrix-rain {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.matrix-char {
  position: absolute;
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  color: var(--accent);
  animation: matrix-rain 3s linear infinite;
  opacity: 0.7;
}

/* Floating Elements */
.floating {
  animation: float 6s ease-in-out infinite;
}

.floating-delay-1 {
  animation: float 6s ease-in-out infinite;
  animation-delay: 1s;
}

.floating-delay-2 {
  animation: float 6s ease-in-out infinite;
  animation-delay: 2s;
}

/* ========================================
   Responsive Animations
======================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 768px) {
  /* Reduce animation complexity on mobile */
  .glitch::before,
  .glitch::after {
    display: none;
  }
  
  .particles-container {
    display: none;
  }
  
  .matrix-rain {
    display: none;
  }
}

/* ========================================
   Performance Optimizations
======================================== */

/* Use transform instead of changing layout properties */
.performant-hover {
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.performant-hover:hover {
  transform: translateY(-2px) scale(1.02);
}

/* Contain animations to improve performance */
.animation-container {
  contain: layout style paint;
}

/* Use will-change sparingly and remove after animation */
.will-animate {
  will-change: transform, opacity;
}

/* Layer promotion for smooth animations */
.promote-layer {
  transform: translateZ(0);
  backface-visibility: hidden;
}