/**
 * animations.css - 애니메이션 스타일시트
 * 소리튠 영어 (Soritune English)
 *
 * Includes:
 * - Keyframe animations
 * - Hover effects
 * - Scroll animations
 * - Loading states
 * - Cosmic theme effects
 */

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

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

/* Fade In Up */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade In Down */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade In Left */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Fade In Right */
@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

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

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

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

/* Glow */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(102, 126, 234, 0.6);
    }
}

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

/* Wave */
@keyframes wave {
    0% {
        transform: translateX(0) translateZ(0) scaleY(1);
    }
    50% {
        transform: translateX(-25%) translateZ(0) scaleY(0.55);
    }
    100% {
        transform: translateX(-50%) translateZ(0) scaleY(1);
    }
}

/* Twinkle (for stars) */
@keyframes twinkle {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.3;
    }
}

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

/* Sound Wave */
@keyframes soundWave {
    0% {
        transform: scaleY(1);
    }
    50% {
        transform: scaleY(0.5);
    }
    100% {
        transform: scaleY(1);
    }
}

/* ==========================================================================
   Animation Classes
   ========================================================================== */
.animate-fadeIn {
    animation: fadeIn 0.6s 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;
}

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

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

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

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

.animate-rotate {
    animation: rotate 20s linear infinite;
}

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

/* ==========================================================================
   Scroll Animation - Reveal on Scroll
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* Staggered Animation Delays */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ==========================================================================
   Hover Effects
   ========================================================================== */

/* Lift Effect */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

/* Scale Effect */
.hover-scale {
    transition: transform var(--transition-fast);
}

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

/* Glow Effect */
.hover-glow {
    transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
    box-shadow: 0 0 30px rgba(102, 126, 234, 0.4);
}

/* Shine Effect */
.hover-shine {
    position: relative;
    overflow: hidden;
}

.hover-shine::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: rotate(30deg) translateX(-100%);
    transition: transform 0.6s;
}

.hover-shine:hover::after {
    transform: rotate(30deg) translateX(100%);
}

/* Border Glow */
.hover-border-glow {
    position: relative;
    transition: all var(--transition-base);
}

.hover-border-glow::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-primary);
    border-radius: inherit;
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-base);
}

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

/* ==========================================================================
   Button Animations
   ========================================================================== */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::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;
}

.btn:hover::before {
    left: 100%;
}

/* 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;
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* ==========================================================================
   Cosmic Theme Effects
   ========================================================================== */

/* Starfield Background */
.cosmic-bg {
    position: relative;
    overflow: hidden;
}

.cosmic-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(2px 2px at 20px 30px, white, transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(1px 1px at 90px 40px, white, transparent),
        radial-gradient(2px 2px at 160px 120px, rgba(255, 255, 255, 0.9), transparent),
        radial-gradient(1px 1px at 230px 60px, white, transparent),
        radial-gradient(2px 2px at 300px 100px, rgba(255, 255, 255, 0.7), transparent),
        radial-gradient(1px 1px at 380px 40px, white, transparent),
        radial-gradient(2px 2px at 450px 90px, rgba(255, 255, 255, 0.8), transparent);
    background-repeat: repeat;
    background-size: 500px 200px;
    animation: twinkle 4s ease-in-out infinite alternate;
    pointer-events: none;
    z-index: 0;
}

/* Gradient Animated Background */
.gradient-animated {
    background: linear-gradient(-45deg, #667eea, #764ba2, #f093fb, #667eea);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

/* Orbiting Element */
.orbit-container {
    position: relative;
}

.orbit-element {
    position: absolute;
    animation: cosmicOrbit 20s linear infinite;
}

/* Sound Wave Visual */
.sound-wave {
    display: flex;
    align-items: center;
    gap: 3px;
    height: 30px;
}

.sound-wave span {
    width: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    animation: soundWave 0.5s ease-in-out infinite;
}

.sound-wave span:nth-child(1) { height: 60%; animation-delay: 0s; }
.sound-wave span:nth-child(2) { height: 100%; animation-delay: 0.1s; }
.sound-wave span:nth-child(3) { height: 40%; animation-delay: 0.2s; }
.sound-wave span:nth-child(4) { height: 80%; animation-delay: 0.3s; }
.sound-wave span:nth-child(5) { height: 50%; animation-delay: 0.4s; }

/* ==========================================================================
   Loading States
   ========================================================================== */

/* Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: rotate 0.8s linear infinite;
}

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

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

/* Dots Loading */
.dots-loading {
    display: flex;
    gap: 8px;
}

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

.dots-loading span:nth-child(1) { animation-delay: -0.32s; }
.dots-loading span:nth-child(2) { animation-delay: -0.16s; }
.dots-loading span:nth-child(3) { animation-delay: 0s; }

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-gray) 25%,
        var(--bg-light) 50%,
        var(--bg-gray) 75%
    );
    background-size: 200% 100%;
    animation: skeleton 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: 12px;
}

.skeleton-image {
    aspect-ratio: 16/10;
}

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

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

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

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

/* ==========================================================================
   Slider Animations
   ========================================================================== */

/* Slide Horizontal */
.slide-horizontal {
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Fade Slide */
.fade-slide-enter {
    opacity: 0;
    transform: translateX(50px);
}

.fade-slide-enter-active {
    opacity: 1;
    transform: translateX(0);
    transition: all 0.5s ease-out;
}

.fade-slide-exit {
    opacity: 1;
    transform: translateX(0);
}

.fade-slide-exit-active {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.5s ease-in;
}

/* Magazine Slide Effect */
.magazine-slide {
    position: relative;
    overflow: hidden;
}

.magazine-slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        transparent 50%,
        rgba(0, 0, 0, 0.7) 100%
    );
    opacity: 0;
    transition: opacity 0.5s;
}

.magazine-slide:hover::after {
    opacity: 1;
}

/* ==========================================================================
   Counter Animation
   ========================================================================== */
.counter {
    display: inline-block;
    font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   Text Effects
   ========================================================================== */

/* Typing Effect */
.typing {
    overflow: hidden;
    border-right: 2px solid var(--primary);
    white-space: nowrap;
    animation:
        typing 3.5s steps(40, end),
        blink-caret 0.75s step-end infinite;
}

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

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

/* Gradient Text Animation */
.gradient-text-animated {
    background: linear-gradient(
        90deg,
        var(--primary),
        var(--secondary),
        var(--accent),
        var(--primary)
    );
    background-size: 300% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 4s ease infinite;
}

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

    .reveal,
    .reveal-left,
    .reveal-right,
    .reveal-scale {
        opacity: 1;
        transform: none;
        transition: none;
    }
}