/* ===========================
   Advanced Animations
   Professional Motion Design
   =========================== */

/* ==================== ENTRANCE ANIMATIONS ==================== */

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

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

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

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

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

/* ==================== INTERACTION ANIMATIONS ==================== */

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

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(37, 99, 235, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(37, 99, 235, 0.8);
    }
}

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

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

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

/* ==================== UTILITY ANIMATIONS ==================== */

.animate-fadeIn {
    animation: fadeIn var(--transition-base);
}

.animate-slideUp {
    animation: slideUp var(--transition-slow);
}

.animate-slideDown {
    animation: slideDown var(--transition-slow);
}

.animate-slideInLeft {
    animation: slideInLeft var(--transition-slow);
}

.animate-slideInRight {
    animation: slideInRight var(--transition-slow);
}

.animate-slideInDown {
    animation: slideInDown var(--transition-slow);
}

.animate-scaleIn {
    animation: scaleIn var(--transition-slow);
}

.animate-popIn {
    animation: popIn var(--transition-slow);
}

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

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

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

.animate-shimmer {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-light) 50%, var(--bg-tertiary) 75%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

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

.animate-bounce {
    animation: bounce 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

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

.transition-fast {
    transition: all var(--transition-fast);
}

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

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

.transition-none {
    transition: none;
}

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

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

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-lift:active {
    transform: translateY(-2px);
}

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

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

.hover-scale:active {
    transform: scale(0.98);
}

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

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
}

.hover-brighten {
    transition: all var(--transition-base);
    filter: brightness(1);
}

.hover-brighten:hover {
    filter: brightness(1.1);
}

.hover-darken {
    transition: all var(--transition-base);
    filter: brightness(1);
}

.hover-darken:hover {
    filter: brightness(0.9);
}

.hover-underline {
    text-decoration: none;
    transition: all var(--transition-base);
    position: relative;
}

.hover-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

.hover-underline:hover::after {
    width: 100%;
}

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

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

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 2s infinite;
}

.spinner-ring {
    display: inline-block;
    width: 40px;
    height: 40px;
}

.spinner-ring::after {
    content: '';
    display: block;
    width: 32px;
    height: 32px;
    margin: 4px;
    border-radius: 50%;
    border: 4px solid var(--primary);
    border-color: var(--primary) transparent var(--primary) transparent;
    animation: spin 1.2s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* ==================== MODAL ANIMATIONS ==================== */

.modal-enter {
    animation: popIn var(--transition-slow) cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-exit {
    animation: popOut var(--transition-slow) cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.backdrop-enter {
    animation: fadeIn var(--transition-slow);
}

.backdrop-exit {
    animation: fadeOut var(--transition-slow);
}

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

/* ==================== STAGGER ANIMATIONS ==================== */

.stagger-item {
    opacity: 0;
    animation: slideUp var(--transition-slow) forwards;
}

.stagger-item:nth-child(1) {
    animation-delay: 0ms;
}

.stagger-item:nth-child(2) {
    animation-delay: 50ms;
}

.stagger-item:nth-child(3) {
    animation-delay: 100ms;
}

.stagger-item:nth-child(4) {
    animation-delay: 150ms;
}

.stagger-item:nth-child(5) {
    animation-delay: 200ms;
}

.stagger-item:nth-child(n+6) {
    animation-delay: 250ms;
}

/* ==================== MICRO INTERACTIONS ==================== */

.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: translate(-50%, -50%);
    transform-origin: 50%;
}

.ripple:active::after {
    animation: rippleEffect 0.6s ease-out;
}

@keyframes rippleEffect {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(28);
        opacity: 0;
    }
}

/* ==================== SCROLL ANIMATIONS ==================== */

.fade-in-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-slow);
}

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

/* ==================== REDUCE MOTION ==================== */

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

/* ==================== PERFORMANCE OPTIMIZATIONS ==================== */

.will-animate {
    will-change: transform, opacity;
}

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

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

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

/* ==================== EASING FUNCTIONS ==================== */

.ease-in {
    transition-timing-function: cubic-bezier(0.4, 0, 1, 1);
}

.ease-out {
    transition-timing-function: cubic-bezier(0, 0, 0.2, 1);
}

.ease-in-out {
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.ease-linear {
    transition-timing-function: linear;
}

.ease-smooth {
    transition-timing-function: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.ease-elastic {
    transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}