/* ================================
   Animation Keyframes
   ================================ */

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in-down {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

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

@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 rotate-in {
    from {
        opacity: 0;
        transform: rotate(-180deg);
    }
    to {
        opacity: 1;
        transform: rotate(0deg);
    }
}

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

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px var(--primary-color);
    }
    50% {
        box-shadow: 0 0 20px var(--primary-color), 0 0 30px var(--primary-color);
    }
}

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

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

@keyframes typewriter {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink-cursor {
    from, to {
        border-color: transparent;
    }
    50% {
        border-color: var(--primary-color);
    }
}

@keyframes progress-bar {
    0% {
        width: 0%;
        background-position: 0% 50%;
    }
    100% {
        width: 100%;
        background-position: 100% 50%;
    }
}

@keyframes particle-float {
    0% {
        transform: translateY(0px) translateX(0px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) translateX(50px) rotate(180deg);
        opacity: 0;
    }
}

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

@keyframes morphing {
    0%, 100% {
        border-radius: 50% 50% 50% 50%;
    }
    25% {
        border-radius: 70% 30% 50% 50%;
    }
    50% {
        border-radius: 50% 70% 30% 50%;
    }
    75% {
        border-radius: 30% 50% 70% 50%;
    }
}

/* ================================
   Animation Classes
   ================================ */

.fade-in-up {
    animation: fade-in-up 0.8s ease-out forwards;
    opacity: 0;
}

.fade-in-down {
    animation: fade-in-down 0.8s ease-out forwards;
    opacity: 0;
}

.fade-in-left {
    animation: fade-in-left 0.8s ease-out forwards;
    opacity: 0;
}

.fade-in-right {
    animation: fade-in-right 0.8s ease-out forwards;
    opacity: 0;
}

.scale-in {
    animation: scale-in 0.6s ease-out forwards;
    opacity: 0;
}

.slide-in-up {
    animation: slide-in-up 0.6s ease-out forwards;
}

.slide-in-down {
    animation: slide-in-down 0.6s ease-out forwards;
}

.rotate-in {
    animation: rotate-in 0.8s ease-out forwards;
    opacity: 0;
}

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

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

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

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

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

/* ================================
   Intersection Observer Animations
   ================================ */

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

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

.stagger-animation {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
}

.stagger-animation.animate {
    opacity: 1;
    transform: translateY(0);
}

.stagger-animation:nth-child(1) { transition-delay: 0.1s; }
.stagger-animation:nth-child(2) { transition-delay: 0.2s; }
.stagger-animation:nth-child(3) { transition-delay: 0.3s; }
.stagger-animation:nth-child(4) { transition-delay: 0.4s; }
.stagger-animation:nth-child(5) { transition-delay: 0.5s; }
.stagger-animation:nth-child(6) { transition-delay: 0.6s; }

/* ================================
   Hover Animations
   ================================ */

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.hover-scale {
    transition: transform 0.3s ease;
}

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

.hover-rotate {
    transition: transform 0.3s ease;
}

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

.hover-glow {
    transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.hover-bounce {
    transition: transform 0.3s ease;
}

.hover-bounce:hover {
    animation: bounce 0.6s ease;
}

@keyframes bounce {
    0%, 20%, 60%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    80% {
        transform: translateY(-5px);
    }
}

/* ================================
   Button Animations
   ================================ */

.btn-animated {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-animated::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn-animated:hover::before {
    width: 300px;
    height: 300px;
}

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

.btn-ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn-ripple:active::after {
    width: 200px;
    height: 200px;
}

.btn-slide {
    position: relative;
    overflow: hidden;
    background: var(--primary-color);
    transition: color 0.3s ease;
}

.btn-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-dark);
    transition: left 0.3s ease;
    z-index: 0;
}

.btn-slide:hover::before {
    left: 0;
}

.btn-slide span {
    position: relative;
    z-index: 1;
}

/* ================================
   Text Animations
   ================================ */

.text-reveal {
    position: relative;
    overflow: hidden;
}

.text-reveal::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    animation: text-reveal 1.5s ease-in-out forwards;
}

@keyframes text-reveal {
    0% {
        left: 0;
        width: 100%;
    }
    50% {
        left: 0;
        width: 100%;
    }
    100% {
        left: 100%;
        width: 0;
    }
}

.typewriter-text {
    overflow: hidden;
    border-right: 2px solid var(--primary-color);
    white-space: nowrap;
    margin: 0 auto;
    animation: typewriter 3s steps(40, end), blink-cursor 0.75s step-end infinite;
}

.gradient-text {
    background: linear-gradient(45deg, var(--primary-color), var(--primary-light), var(--secondary-color));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 3s ease infinite;
}

.glitch-text {
    position: relative;
    color: var(--primary-color);
}

.glitch-text::before,
.glitch-text::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch-text::before {
    animation: glitch-1 0.5s infinite;
    color: #ff0000;
    z-index: -1;
}

.glitch-text::after {
    animation: glitch-2 0.5s infinite;
    color: #00ffff;
    z-index: -2;
}

@keyframes glitch-1 {
    0%, 14%, 15%, 49%, 50%, 99%, 100% {
        transform: translate(0);
    }
    15%, 49% {
        transform: translate(-2px, -1px);
    }
}

@keyframes glitch-2 {
    0%, 20%, 21%, 62%, 63%, 99%, 100% {
        transform: translate(0);
    }
    21%, 62% {
        transform: translate(2px, 1px);
    }
}

/* ================================
   Card Animations
   ================================ */

.card-flip {
    perspective: 1000px;
}

.card-flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.card-flip:hover .card-flip-inner {
    transform: rotateY(180deg);
}

.card-flip-front,
.card-flip-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--border-radius-lg);
}

.card-flip-back {
    transform: rotateY(180deg);
}

.card-slide-in {
    transform: translateX(-100%);
    opacity: 0;
    transition: transform 0.6s ease, opacity 0.6s ease;
}

.card-slide-in.visible {
    transform: translateX(0);
    opacity: 1;
}

.card-fade-in {
    opacity: 0;
    transform: translateY(30px) scale(0.9);
    transition: all 0.6s ease;
}

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

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

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-dots {
    display: inline-block;
}

.loading-dots span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    margin: 0 2px;
    animation: loading-dots 1.4s ease-in-out infinite both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes loading-dots {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.loading-wave {
    display: flex;
    gap: 4px;
}

.loading-wave div {
    width: 4px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 2px;
    animation: loading-wave 1.2s ease-in-out infinite;
}

.loading-wave div:nth-child(1) { animation-delay: -1.2s; }
.loading-wave div:nth-child(2) { animation-delay: -1.1s; }
.loading-wave div:nth-child(3) { animation-delay: -1.0s; }
.loading-wave div:nth-child(4) { animation-delay: -0.9s; }
.loading-wave div:nth-child(5) { animation-delay: -0.8s; }

@keyframes loading-wave {
    0%, 40%, 100% {
        transform: scaleY(0.4);
    }
    20% {
        transform: scaleY(1);
    }
}

/* ================================
   Progress Animations
   ================================ */

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--bg-gradient);
    border-radius: 4px;
    transition: width 0.8s ease;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: progress-shine 2s infinite;
}

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

.circular-progress {
    position: relative;
    width: 100px;
    height: 100px;
}

.circular-progress svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.circular-progress circle {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
}

.circular-progress .bg {
    stroke: var(--gray-200);
}

.circular-progress .progress {
    stroke: var(--primary-color);
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 0.8s ease;
}

/* ================================
   Notification Animations
   ================================ */

.notification {
    transform: translateX(400px);
    opacity: 0;
    transition: all 0.3s ease;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification.hide {
    transform: translateX(400px);
    opacity: 0;
}

.toast-slide-in {
    animation: toast-slide-in 0.3s ease;
}

.toast-slide-out {
    animation: toast-slide-out 0.3s ease;
}

@keyframes toast-slide-in {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes toast-slide-out {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ================================
   Parallax Effects
   ================================ */

.parallax-container {
    overflow: hidden;
    position: relative;
}

.parallax-element {
    transform: translateZ(0);
    transition: transform 0.1s ease-out;
}

.parallax-slow {
    transform: translate3d(0, calc(var(--scroll-y) * 0.5px), 0);
}

.parallax-medium {
    transform: translate3d(0, calc(var(--scroll-y) * 0.3px), 0);
}

.parallax-fast {
    transform: translate3d(0, calc(var(--scroll-y) * 0.1px), 0);
}

/* ================================
   Morphing Shapes
   ================================ */

.morphing-shape {
    animation: morphing 8s ease-in-out infinite;
}

.blob-shape {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    animation: blob-morph 7s ease-in-out infinite;
}

@keyframes blob-morph {
    0% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    }
    50% {
        border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
    }
    100% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    }
}

/* ================================
   Particle System
   ================================ */

.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: particle-float 10s infinite linear;
}

.particle:nth-child(odd) {
    animation-duration: 12s;
    animation-delay: -2s;
}

.particle:nth-child(even) {
    animation-duration: 8s;
    animation-delay: -4s;
}

/* ================================
   Responsive Animation Adjustments
   ================================ */

@media (max-width: 768px) {
    .fade-in-up,
    .fade-in-down,
    .fade-in-left,
    .fade-in-right {
        animation-duration: 0.6s;
    }
    
    .stagger-animation:nth-child(n) {
        transition-delay: 0.1s;
    }
    
    .typewriter-text {
        animation-duration: 2s;
    }
    
    .card-flip:hover .card-flip-inner {
        transform: none;
    }
    
    .card-flip:active .card-flip-inner {
        transform: rotateY(180deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .fade-in-up,
    .fade-in-down,
    .fade-in-left,
    .fade-in-right,
    .scale-in,
    .rotate-in,
    .animate-on-scroll,
    .stagger-animation {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
    
    .pulse,
    .float,
    .swing,
    .glow,
    .morphing-shape,
    .blob-shape,
    .particle {
        animation: none !important;
    }
    
    .parallax-element,
    .parallax-slow,
    .parallax-medium,
    .parallax-fast {
        transform: none !important;
    }
}