/* Keyframe Animations */
@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-15px); /* Reduced movement */
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.5;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

@keyframes scrollPulse {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  50% {
    opacity: 0.5;
    transform: translateY(10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200px 0;
  }
  100% {
    background-position: calc(200px + 100%) 0;
  }
}

@keyframes bounce {
  0%,
  20%,
  53%,
  80%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  40%,
  43% {
    transform: translate3d(0, -30px, 0);
  }
  70% {
    transform: translate3d(0, -15px, 0);
  }
  90% {
    transform: translate3d(0, -4px, 0);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* LOADING SCREEN ANIMATIONS */
@keyframes loadingFadeIn {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1.1);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes loadingPulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* PAGE TRANSITION ANIMATIONS */
@keyframes pageTransitionIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* SCROLL-BASED ANIMATIONS */
@keyframes scrollFadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollFadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scrollFadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes cardSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* LOADING SCREEN STYLES */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity 0.5s ease;
}

.loading-screen.fade-out {
  opacity: 0;
}

.loading-content {
  text-align: center;
}

.loading-text {
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: loadingFadeIn 1s ease-out, loadingPulse 2s ease-in-out infinite 1s;
}

/* PAGE TRANSITION STYLES */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.page-transition.active {
  opacity: 1;
  visibility: visible;
}

/* SCROLL REVEAL ANIMATIONS */
.scroll-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Timeline specific animations */
.timeline-item {
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.timeline-item.scroll-reveal {
  transform: translateY(40px);
}

.timeline-item.scroll-reveal.animate-in {
  animation: scrollFadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.timeline-content.reverse .timeline-item.scroll-reveal.animate-in {
  animation: scrollFadeInLeft 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* PROJECT CARD ANIMATIONS */
.card-reveal {
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-reveal.card-animate-in {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn 0.6s ease-out;
}

.animate-slide-up {
  animation: slideInUp 0.6s ease-out;
}

.animate-slide-left {
  animation: slideInLeft 0.6s ease-out;
}

.animate-slide-right {
  animation: slideInRight 0.6s ease-out;
}

.animate-scale-in {
  animation: scaleIn 0.6s ease-out;
}

.animate-bounce {
  animation: bounce 2s infinite;
}

/* Stagger animations */
.stagger-1 {
  animation-delay: 0.1s;
}
.stagger-2 {
  animation-delay: 0.2s;
}
.stagger-3 {
  animation-delay: 0.3s;
}
.stagger-4 {
  animation-delay: 0.4s;
}
.stagger-5 {
  animation-delay: 0.5s;
}

/* Intersection Observer animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.6s ease-out;
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.6s ease-out;
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.6s ease-out;
}

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

/* Loading animations */
.loading-shimmer {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
  background-size: 200px 100%;
  animation: shimmer 1.5s infinite;
}

/* Hover animations */
.hover-lift {
  transition: transform var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-5px);
}

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

.hover-scale:hover {
  transform: scale(1.05);
}

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

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

/* Text animations */
.text-gradient-animate {
  background: linear-gradient(45deg, #3b82f6, #8b5cf6, #ec4899, #06b6d4);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
}

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

/* Particle animation */
.particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent-primary);
  border-radius: 50%;
  opacity: 0.6;
  animation: particleFloat 8s linear infinite;
}

@keyframes particleFloat {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}

/* Enhanced timeline marker animations */
.timeline-marker {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-marker:hover {
  transform: translateX(-50%) scale(1.1);
}

.timeline-marker:hover .marker-dot {
  /* Removed expensive box-shadow animation */
}

/* Reduced motion preferences */
@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;
  }

  .gradient-orb,
  .image-glow,
  .cursor,
  .scroll-line {
    animation: none;
  }

  .reveal-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Smooth transitions for theme switching */
* {
  transition: background-color var(--transition-normal), color var(--transition-normal), border-color
    var(--transition-normal);
}

/* Performance-Optimized Animations */

/* Apply animations with will-change for performance */
.gradient-orb {
  animation: float 8s ease-in-out infinite; /* Slower animation */
  will-change: transform;
  transform: translateZ(0); /* Force GPU acceleration */
}

.orb-1 {
  animation-delay: 0s;
}

.orb-2 {
  animation-delay: 2s;
}

.orb-3 {
  animation-delay: 4s;
}

.image-glow {
  animation: pulse 3s ease-in-out infinite;
  will-change: transform, opacity;
}

.cursor {
  animation: blink 1s infinite;
}

.scroll-line {
  animation: scrollPulse 2s ease-in-out infinite;
}

/* Performance-optimized reveal animations */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(20px); /* Reduced distance */
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.reveal-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* GPU acceleration for better performance */
.timeline-item,
.project-card,
.gradient-orb {
  transform: translateZ(0);
  backface-visibility: hidden;
}