/**
 * 중등영어인강 - Animations Stylesheet
 * https://middle.soritune.com/
 *
 * CSS Animations and Transitions
 * @version 1.0.0
 */

/* ==========================================================================
   Keyframe Animations
   ========================================================================== */

/* Fade Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

/* Bounce Animations */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

@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);
    }
}

/* Pulse Animations */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(3, 199, 90, 0.4);
    }
    50% {
        box-shadow: 0 0 40px rgba(3, 199, 90, 0.8);
    }
}

@keyframes pulseDot {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.5);
        opacity: 0.5;
    }
}

/* Floating Animations */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes floatSlow {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(2deg);
    }
    50% {
        transform: translateY(-20px) rotate(0deg);
    }
    75% {
        transform: translateY(-10px) rotate(-2deg);
    }
}

@keyframes floatRotate {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(10deg);
    }
}

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

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

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

/* Wobble Animation */
@keyframes wobble {
    0%, 100% {
        transform: translateX(0) rotate(0);
    }
    15% {
        transform: translateX(-10px) rotate(-5deg);
    }
    30% {
        transform: translateX(8px) rotate(3deg);
    }
    45% {
        transform: translateX(-6px) rotate(-3deg);
    }
    60% {
        transform: translateX(4px) rotate(2deg);
    }
    75% {
        transform: translateX(-2px) rotate(-1deg);
    }
}

/* Slide Animations */
@keyframes slideInUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

@keyframes gradientRotate {
    0% {
        filter: hue-rotate(0deg);
    }
    100% {
        filter: hue-rotate(360deg);
    }
}

/* Glow Animations */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(3, 199, 90, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(3, 199, 90, 0.6), 0 0 60px rgba(3, 199, 90, 0.3);
    }
}

@keyframes textGlow {
    0%, 100% {
        text-shadow: 0 0 10px rgba(3, 199, 90, 0.5);
    }
    50% {
        text-shadow: 0 0 20px rgba(3, 199, 90, 0.8), 0 0 30px rgba(3, 199, 90, 0.5);
    }
}

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

/* Wave Animation */
@keyframes wave {
    0% {
        transform: translateX(0) translateY(0);
    }
    25% {
        transform: translateX(-5px) translateY(-10px);
    }
    50% {
        transform: translateX(0) translateY(0);
    }
    75% {
        transform: translateX(5px) translateY(-5px);
    }
    100% {
        transform: translateX(0) translateY(0);
    }
}

/* Typing Animation */
@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

/* Cosmic Animations */
@keyframes cosmicOrbit {
    0% {
        transform: rotate(0deg) translateX(100px) rotate(0deg);
    }
    100% {
        transform: rotate(360deg) translateX(100px) rotate(-360deg);
    }
}

@keyframes starTwinkle {
    0%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

@keyframes nebulaPulse {
    0%, 100% {
        opacity: 0.3;
        filter: blur(50px);
    }
    50% {
        opacity: 0.5;
        filter: blur(60px);
    }
}

/* Morphing Animation */
@keyframes morph {
    0%, 100% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    }
    25% {
        border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
    }
    50% {
        border-radius: 50% 60% 30% 60% / 30% 60% 70% 40%;
    }
    75% {
        border-radius: 60% 40% 60% 30% / 70% 30% 50% 60%;
    }
}

/* Loading Animations */
@keyframes dotPulse {
    0%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes progressBar {
    0% {
        width: 0%;
    }
    100% {
        width: 100%;
    }
}

/* Card Hover Effect */
@keyframes cardShine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

/* Counter Animation */
@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Fade */
.animate-fadeIn {
    animation: fadeIn 0.5s ease-out forwards;
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out forwards;
}

.animate-fadeInDown {
    animation: fadeInDown 0.6s ease-out forwards;
}

.animate-fadeInLeft {
    animation: fadeInLeft 0.6s ease-out forwards;
}

.animate-fadeInRight {
    animation: fadeInRight 0.6s ease-out forwards;
}

/* Scale */
.animate-scaleIn {
    animation: scaleIn 0.4s ease-out forwards;
}

.animate-popIn {
    animation: popIn 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

.animate-bounceIn {
    animation: bounceIn 0.6s ease-out forwards;
}

/* Continuous */
.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

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

.animate-floatSlow {
    animation: floatSlow 6s ease-in-out infinite;
}

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

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

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

.animate-morph {
    animation: morph 8s ease-in-out infinite;
}

/* Slide */
.animate-slideInUp {
    animation: slideInUp 0.5s ease-out forwards;
}

.animate-slideInDown {
    animation: slideInDown 0.5s ease-out forwards;
}

.animate-slideInLeft {
    animation: slideInLeft 0.5s ease-out forwards;
}

.animate-slideInRight {
    animation: slideInRight 0.5s ease-out forwards;
}

/* ==========================================================================
   Animation Delays
   ========================================================================== */
.delay-100 {
    animation-delay: 100ms;
}

.delay-200 {
    animation-delay: 200ms;
}

.delay-300 {
    animation-delay: 300ms;
}

.delay-400 {
    animation-delay: 400ms;
}

.delay-500 {
    animation-delay: 500ms;
}

.delay-600 {
    animation-delay: 600ms;
}

.delay-700 {
    animation-delay: 700ms;
}

.delay-800 {
    animation-delay: 800ms;
}

.delay-900 {
    animation-delay: 900ms;
}

.delay-1000 {
    animation-delay: 1000ms;
}

/* ==========================================================================
   Animation Durations
   ========================================================================== */
.duration-fast {
    animation-duration: 200ms;
}

.duration-normal {
    animation-duration: 400ms;
}

.duration-slow {
    animation-duration: 600ms;
}

.duration-slower {
    animation-duration: 1000ms;
}

/* ==========================================================================
   Scroll-Triggered Animations (with JS)
   ========================================================================== */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.scroll-animate-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.scroll-animate-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scroll-animate-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger animation for lists */
.stagger-animate > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.stagger-animate.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-animate.visible > *:nth-child(2) { transition-delay: 100ms; }
.stagger-animate.visible > *:nth-child(3) { transition-delay: 200ms; }
.stagger-animate.visible > *:nth-child(4) { transition-delay: 300ms; }
.stagger-animate.visible > *:nth-child(5) { transition-delay: 400ms; }
.stagger-animate.visible > *:nth-child(6) { transition-delay: 500ms; }
.stagger-animate.visible > *:nth-child(7) { transition-delay: 600ms; }
.stagger-animate.visible > *:nth-child(8) { transition-delay: 700ms; }

.stagger-animate.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Hover Animations
   ========================================================================== */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

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

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

.hover-glow:hover {
    box-shadow: 0 0 30px rgba(3, 199, 90, 0.5);
}

.hover-shine {
    position: relative;
    overflow: hidden;
}

.hover-shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.5s ease;
}

.hover-shine:hover::before {
    left: 100%;
}

.hover-border-glow {
    position: relative;
}

.hover-border-glow::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-primary);
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.hover-border-glow:hover::after {
    opacity: 1;
}

/* ==========================================================================
   Loading States
   ========================================================================== */
.loading-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spinnerRotate 0.8s linear infinite;
}

.loading-spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.loading-spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 4px;
}

.loading-dots {
    display: flex;
    gap: 8px;
}

.loading-dots span {
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: dotPulse 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

.loading-skeleton {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.05) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0.05) 100%
    );
    background-size: 200% 100%;
    animation: gradientShift 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

/* ==========================================================================
   Page Transitions
   ========================================================================== */
.page-enter {
    opacity: 0;
    transform: translateY(20px);
}

.page-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.page-exit {
    opacity: 1;
    transform: translateY(0);
}

.page-exit-active {
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ==========================================================================
   Button Ripple Effect
   ========================================================================== */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    animation: ripple 0.6s linear;
    pointer-events: none;
}

/* ==========================================================================
   Text Reveal Animations
   ========================================================================== */
.text-reveal {
    overflow: hidden;
}

.text-reveal span {
    display: inline-block;
    transform: translateY(100%);
    animation: slideInUp 0.6s ease-out forwards;
}

.text-typing {
    overflow: hidden;
    border-right: 2px solid var(--color-primary);
    white-space: nowrap;
    animation:
        typing 3s steps(30, end),
        blink 0.75s step-end infinite;
}

/* ==========================================================================
   Image Animations
   ========================================================================== */
.img-zoom-container {
    overflow: hidden;
}

.img-zoom {
    transition: transform 0.5s ease;
}

.img-zoom-container:hover .img-zoom {
    transform: scale(1.1);
}

.img-parallax {
    transition: transform 0.1s ease-out;
}

/* ==========================================================================
   Counter Animation
   ========================================================================== */
.counter-animate {
    opacity: 0;
}

.counter-animate.counting {
    animation: countUp 0.5s ease-out forwards;
}

/* ==========================================================================
   Notification Animations
   ========================================================================== */
.notification-enter {
    animation: slideInRight 0.3s ease-out forwards;
}

.notification-exit {
    animation: fadeOut 0.2s ease-out forwards;
}

/* ==========================================================================
   Modal Animations
   ========================================================================== */
.modal-backdrop-enter {
    animation: fadeIn 0.2s ease-out forwards;
}

.modal-backdrop-exit {
    animation: fadeOut 0.2s ease-out forwards;
}

.modal-content-enter {
    animation: scaleIn 0.3s ease-out forwards;
}

.modal-content-exit {
    animation: scaleOut 0.2s ease-out forwards;
}

/* ==========================================================================
   Tooltip Animations
   ========================================================================== */
.tooltip-enter {
    animation: fadeInUp 0.2s ease-out forwards;
}

.tooltip-exit {
    animation: fadeOut 0.15s ease-out forwards;
}

/* ==========================================================================
   Accordion Animations
   ========================================================================== */
.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.accordion-content.open {
    max-height: 1000px;
}

.accordion-icon {
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

/* ==========================================================================
   Tab Animations
   ========================================================================== */
.tab-content {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.tab-content.active {
    opacity: 1;
    transform: translateX(0);
}

/* ==========================================================================
   Cosmic Background Animations
   ========================================================================== */
.cosmic-bg {
    position: relative;
    overflow: hidden;
}

.cosmic-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 80%, rgba(3, 199, 90, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
    animation: nebulaPulse 8s ease-in-out infinite;
    pointer-events: none;
}

.star {
    position: absolute;
    width: 3px;
    height: 3px;
    background: white;
    border-radius: 50%;
    animation: starTwinkle 2s ease-in-out infinite;
}

.star:nth-child(odd) {
    animation-delay: 0.5s;
}

.star:nth-child(3n) {
    animation-duration: 3s;
}

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

    .scroll-animate,
    .scroll-animate-left,
    .scroll-animate-right,
    .scroll-animate-scale,
    .stagger-animate > * {
        opacity: 1;
        transform: none;
    }

    .hover-lift:hover,
    .hover-scale:hover {
        transform: none;
    }

    .loading-spinner {
        animation: none;
        border-top-color: var(--color-primary);
        border-right-color: var(--color-primary);
        border-bottom-color: var(--color-primary);
    }
}