/* ============================================
   ANIMATIONS & TRANSITIONS
   ============================================ */

/* === FADE ANIMATIONS === */

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

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

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* === SCALE ANIMATIONS === */

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

@keyframes scaleUp {
    from {
        transform: scale(0.95);
    }
    to {
        transform: scale(1);
    }
}

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

/* === GLOW ANIMATIONS === */

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(102, 126, 234, 0.4);
    }
    50% {
        box-shadow: 0 0 25px rgba(102, 126, 234, 0.8);
    }
}

@keyframes glowSuccess {
    0%, 100% {
        box-shadow: 0 0 10px rgba(74, 222, 128, 0.4);
    }
    50% {
        box-shadow: 0 0 25px rgba(74, 222, 128, 0.8);
    }
}

@keyframes glowDanger {
    0%, 100% {
        box-shadow: 0 0 10px rgba(248, 113, 113, 0.4);
    }
    50% {
        box-shadow: 0 0 25px rgba(248, 113, 113, 0.8);
    }
}

@keyframes glowWarning {
    0%, 100% {
        box-shadow: 0 0 10px rgba(251, 191, 36, 0.4);
    }
    50% {
        box-shadow: 0 0 25px rgba(251, 191, 36, 0.8);
    }
}

/* === BOUNCE ANIMATIONS === */

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* === SLIDE ANIMATIONS === */

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

@keyframes slideInRight {
    from {
        transform: translateX(100%);
    }
    to {
        transform: translateX(0);
    }
}

/* === SPIN ANIMATIONS === */

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

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

/* === SHIMMER ANIMATIONS === */

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

/* === GRADIENT ANIMATIONS === */

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

/* ============================================
   ANIMATION UTILITY CLASSES
   ============================================ */

/* === FADE UTILITIES === */

.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

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

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

.animate-fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

/* === SCALE UTILITIES === */

.animate-scale-in {
    animation: scaleIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* === GLOW UTILITIES === */

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}

.animate-glow-success {
    animation: glowSuccess 2s ease-in-out infinite;
}

.animate-glow-danger {
    animation: glowDanger 2s ease-in-out infinite;
}

.animate-glow-warning {
    animation: glowWarning 2s ease-in-out infinite;
}

/* === BOUNCE UTILITIES === */

.animate-bounce-in {
    animation: bounceIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

/* === SPIN UTILITIES === */

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

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

/* === SHIMMER UTILITIES === */

.animate-shimmer {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.4) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* === GRADIENT ANIMATION === */

.animate-gradient {
    background-size: 200% 200%;
    animation: gradientShift 3s ease infinite;
}

/* ============================================
   STAGGERED 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;
}

.stagger-6 {
    animation-delay: 0.6s;
}

/* ============================================
   TRANSITION UTILITIES
   ============================================ */

.transition-all {
    transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-fast {
    transition: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-slow {
    transition: all 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-colors {
    transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1),
                background-color 250ms cubic-bezier(0.4, 0, 0.2, 1),
                border-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-transform {
    transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-shadow {
    transition: box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   HOVER EFFECTS
   ============================================ */

.hover-lift {
    transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

.hover-scale {
    transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.6);
}

.hover-shadow:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 
                0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* ============================================
   LOADING ANIMATIONS
   ============================================ */

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

.loading-bar {
    position: relative;
    overflow: hidden;
}

.loading-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: loading 1.5s infinite;
}

/* ============================================
   SKELETON LOADERS
   ============================================ */

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

.skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 0px,
        #f8f8f8 40px,
        #f0f0f0 80px
    );
    background-size: 200px;
    animation: skeleton-loading 1.4s ease-in-out infinite;
}

/* ============================================
   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) {
    .animate-fade-in-up,
    .animate-fade-in-down,
    .animate-fade-in-left,
    .animate-fade-in-right {
        animation-duration: 0.4s;
    }
}