/**
 * Animation Library v2.0
 * Performance-optimized animations for modern browsers
 */

/* ==================== Animation Timing Functions ==================== */
:root {
  --ease-in-out-sine: cubic-bezier(0.37, 0, 0.63, 1);
  --ease-in-out-quad: cubic-bezier(0.45, 0, 0.55, 1);
  --ease-in-out-cubic: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* ==================== Fade Animations ==================== */
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in-down {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in-left {
  from {
    opacity: 0;
    transform: translateX(16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fade-in-right {
  from {
    opacity: 0;
    transform: translateX(-16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes scale-out {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(0.9);
  }
}

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

@keyframes pop-in {
  0% {
    opacity: 0;
    transform: scale(0.5);
  }
  70% {
    transform: scale(1.05);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* ==================== Slide Animations ==================== */
@keyframes slide-in-up {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

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

@keyframes slide-in-left {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes slide-in-right {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

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

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

/* ==================== Bounce Animations ==================== */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
    animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
  }
  50% {
    transform: translateY(-8px);
    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
  }
}

@keyframes bounce-dot {
  0%, 100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  50% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

@keyframes bounce-subtle {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-3px);
  }
}

/* ==================== Pulse Animations ==================== */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

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

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
  }
  50% {
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.7);
  }
}

@keyframes heartbeat {
  0%, 100% {
    transform: scale(1);
  }
  14% {
    transform: scale(1.1);
  }
  28% {
    transform: scale(1);
  }
  42% {
    transform: scale(1.1);
  }
  70% {
    transform: scale(1);
  }
}

/* ==================== Spin Animations ==================== */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

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

/* ==================== Shimmer & Loading ==================== */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

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

@keyframes progress-indeterminate {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(400%);
  }
}

/* ==================== Float Animations ==================== */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes float-subtle {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-4px);
  }
}

/* ==================== Shake Animations ==================== */
@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-4px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(4px);
  }
}

@keyframes shake-subtle {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-2px);
  }
  75% {
    transform: translateX(2px);
  }
}

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

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

/* ==================== Special Effects ==================== */
@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

@keyframes wiggle {
  0%, 100% {
    transform: rotate(0deg);
  }
  25% {
    transform: rotate(-5deg);
  }
  75% {
    transform: rotate(5deg);
  }
}

/* ==================== Animation Classes ==================== */
.animate-fade-in { animation: fade-in 0.3s ease-out forwards; }
.animate-fade-out { animation: fade-out 0.3s ease-out forwards; }
.animate-fade-in-up { animation: fade-in-up 0.4s ease-out forwards; }
.animate-fade-in-down { animation: fade-in-down 0.4s ease-out forwards; }
.animate-fade-in-left { animation: fade-in-left 0.4s ease-out forwards; }
.animate-fade-in-right { animation: fade-in-right 0.4s ease-out forwards; }

.animate-scale-in { animation: scale-in 0.3s ease-out forwards; }
.animate-scale-out { animation: scale-out 0.3s ease-out forwards; }
.animate-pop-in { animation: pop-in 0.4s var(--ease-spring) forwards; }

.animate-slide-in-up { animation: slide-in-up 0.3s ease-out forwards; }
.animate-slide-in-down { animation: slide-in-down 0.3s ease-out forwards; }
.animate-slide-in-left { animation: slide-in-left 0.3s ease-out forwards; }
.animate-slide-in-right { animation: slide-in-right 0.3s ease-out forwards; }
.animate-slide-out-up { animation: slide-out-up 0.3s ease-out forwards; }
.animate-slide-out-down { animation: slide-out-down 0.3s ease-out forwards; }

.animate-bounce { animation: bounce 1s infinite; }
.animate-bounce-dot { animation: bounce-dot 1.2s infinite; }
.animate-bounce-subtle { animation: bounce-subtle 2s infinite; }

.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-pulse-scale { animation: pulse-scale 2s ease-in-out infinite; }
.animate-pulse-glow { animation: pulse-glow 2s ease-in-out infinite; }
.animate-heartbeat { animation: heartbeat 1.5s ease-in-out infinite; }

.animate-spin { animation: spin 1s linear infinite; }
.animate-spin-slow { animation: spin-slow 3s linear infinite; }

.animate-shimmer {
  animation: shimmer 2s ease-in-out infinite;
  background-size: 200% 100%;
}

.animate-skeleton {
  background: linear-gradient(90deg, #1e293b 25%, #334155 50%, #1e293b 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

.animate-float { animation: float 3s ease-in-out infinite; }
.animate-float-subtle { animation: float-subtle 2s ease-in-out infinite; }

.animate-shake { animation: shake 0.5s ease-in-out; }
.animate-shake-subtle { animation: shake-subtle 0.3s ease-in-out; }

.animate-gradient {
  background-size: 200% 200%;
  animation: gradient-shift 4s ease infinite;
}

.animate-ping { animation: ping 1s cubic-bezier(0, 0, 0.2, 1) infinite; }
.animate-wiggle { animation: wiggle 0.3s ease-in-out; }

/* ==================== Animation Delays ==================== */
.delay-75 { animation-delay: 75ms; }
.delay-100 { animation-delay: 100ms; }
.delay-150 { animation-delay: 150ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-500 { animation-delay: 500ms; }
.delay-700 { animation-delay: 700ms; }
.delay-1000 { animation-delay: 1000ms; }

/* ==================== Animation Durations ==================== */
.duration-75 { animation-duration: 75ms; }
.duration-100 { animation-duration: 100ms; }
.duration-150 { animation-duration: 150ms; }
.duration-200 { animation-duration: 200ms; }
.duration-300 { animation-duration: 300ms; }
.duration-500 { animation-duration: 500ms; }
.duration-700 { animation-duration: 700ms; }
.duration-1000 { animation-duration: 1000ms; }

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