/* ============================================
   ANIMATIONS & TRANSITIONS
   GSAP-compatible animation utilities
   ============================================ */

/* ============ Fade Animations ============ */

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

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

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

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

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

/* ============ Scale Animations ============ */

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

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

/* ============ Slide Animations ============ */

@keyframes slideInUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

/* ============ Reveal Animations ============ */

.reveal {
  opacity: 0;
  transform: translateY(40px);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
  transition: all var(--transition-slow) var(--ease-out);
}

/* Staggered reveal for children */
.stagger-reveal > * {
  opacity: 0;
  transform: translateY(20px);
}

.stagger-reveal.active > *:nth-child(1) {
  animation: fadeInUp 0.6s var(--ease-out) 0.1s forwards;
}

.stagger-reveal.active > *:nth-child(2) {
  animation: fadeInUp 0.6s var(--ease-out) 0.2s forwards;
}

.stagger-reveal.active > *:nth-child(3) {
  animation: fadeInUp 0.6s var(--ease-out) 0.3s forwards;
}

.stagger-reveal.active > *:nth-child(4) {
  animation: fadeInUp 0.6s var(--ease-out) 0.4s forwards;
}

.stagger-reveal.active > *:nth-child(5) {
  animation: fadeInUp 0.6s var(--ease-out) 0.5s forwards;
}

/* ============ Loading Animations ============ */

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.shimmer {
  background: linear-gradient(
    90deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-tertiary) 50%,
    var(--color-bg-secondary) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* ============ Hover Effects ============ */

.hover-lift {
  transition: transform var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

.hover-glow {
  transition: box-shadow var(--transition-base);
}

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

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

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

/* ============ Gradient Animations ============ */

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

.gradient-animate {
  background-size: 200% 200%;
  animation: gradientShift 5s ease infinite;
}

/* ============ Rotation Animations ============ */

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

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

/* ============ Bounce Animations ============ */

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* ============ Utility Classes ============ */

.animate-fade-in {
  animation: fadeIn 0.6s var(--ease-out);
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s var(--ease-out);
}

.animate-fade-in-down {
  animation: fadeInDown 0.6s var(--ease-out);
}

.animate-scale-in {
  animation: scaleIn 0.4s var(--ease-out);
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-spin {
  animation: rotate 1s linear infinite;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

/* ============ GSAP Animation Helpers ============ */

/* Elements that will be animated by GSAP */
.gsap-fade-in {
  opacity: 0;
}

.gsap-slide-up {
  opacity: 0;
  transform: translateY(60px);
}

.gsap-slide-down {
  opacity: 0;
  transform: translateY(-60px);
}

.gsap-slide-left {
  opacity: 0;
  transform: translateX(60px);
}

.gsap-slide-right {
  opacity: 0;
  transform: translateX(-60px);
}

.gsap-scale {
  opacity: 0;
  transform: scale(0.8);
}

/* Stagger container */
.gsap-stagger > * {
  opacity: 0;
  transform: translateY(30px);
}

/* ============ Parallax Effect ============ */

.parallax {
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ============ Magnetic Effect ============ */

.magnetic {
  transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ============ Filter State Transitions ============ */

.project-card {
  transition: all var(--transition-base);
}

.project-card.hide {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
  position: absolute;
}

.project-card.show {
  opacity: 1;
  transform: scale(1);
  pointer-events: all;
  position: relative;
}

/* ============ Number Counter Animation ============ */

.counter {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ============ Typing Effect ============ */

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

.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--color-primary);
  margin-left: 4px;
  animation: blink 1s infinite;
  vertical-align: text-bottom;
}

/* ============ Progress Bar Animation ============ */

@keyframes progress {
  from {
    transform: scaleX(0);
    transform-origin: left;
  }
  to {
    transform: scaleX(1);
    transform-origin: left;
  }
}

.progress-bar {
  animation: progress 1s var(--ease-out) forwards;
}

/* ============ Ripple Effect ============ */

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  pointer-events: none;
  animation: ripple 0.6s ease-out;
}

/* ============ Image Loading ============ */

.img-loading {
  background: var(--color-bg-tertiary);
  position: relative;
  overflow: hidden;
}

.img-loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.05),
    transparent
  );
  animation: shimmer 2s infinite;
}

.img-loaded::after {
  display: none;
}

/* ============ Smooth Appear on Scroll ============ */

.scroll-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out),
              transform 0.8s var(--ease-out);
}

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

/* Delay variations */
.scroll-reveal[data-delay="1"] {
  transition-delay: 0.1s;
}

.scroll-reveal[data-delay="2"] {
  transition-delay: 0.2s;
}

.scroll-reveal[data-delay="3"] {
  transition-delay: 0.3s;
}

.scroll-reveal[data-delay="4"] {
  transition-delay: 0.4s;
}

/* ============ Button Loading State ============ */

.btn-loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: rotate 0.6s linear infinite;
}

/* ============ Icon Pulse Animation ============ */

@keyframes iconPulse {
  0%, 100% {
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.1);
  }
  50% {
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.2);
  }
}

.skill-icon {
  animation: iconPulse 3s ease-in-out infinite;
}