/**
 * 소리튠 영어인강 - Animations Stylesheet
 * ANTIGRAVITY Effects: Light Reflect, Energy Vortex, Pyramid Rise
 */

/* ========== Base Animation Utilities ========== */
.animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate.in-view {
    opacity: 1;
    transform: translateY(0);
}

.animate-delay-1 { transition-delay: 0.1s; }
.animate-delay-2 { transition-delay: 0.2s; }
.animate-delay-3 { transition-delay: 0.3s; }
.animate-delay-4 { transition-delay: 0.4s; }
.animate-delay-5 { transition-delay: 0.5s; }

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

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

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

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 20px var(--glow-primary);
    }
    50% {
        box-shadow: 0 0 40px var(--glow-primary), 0 0 60px var(--glow-secondary);
    }
}

/* Float Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes floatRotate {
    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);
    }
}

/* ========== ANTIGRAVITY EFFECT 1: Light Reflect (빛 반사) ========== */
@keyframes lightReflect {
    0% {
        background-position: -200% center;
    }
    100% {
        background-position: 200% center;
    }
}

.light-reflect {
    position: relative;
    overflow: hidden;
}

.light-reflect::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0) 40%,
        rgba(255, 255, 255, 0.4) 50%,
        rgba(255, 255, 255, 0) 60%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: lightReflect 3s ease-in-out infinite;
    pointer-events: none;
}

/* Light Reflect on Text */
.text-light-reflect {
    background: linear-gradient(
        90deg,
        var(--text-white) 0%,
        var(--text-white) 40%,
        var(--primary-light) 50%,
        var(--text-white) 60%,
        var(--text-white) 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: lightReflect 4s ease-in-out infinite;
}

/* ========== ANTIGRAVITY EFFECT 2: Energy Vortex (에너지 소용돌이) ========== */
@keyframes energyVortex {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes energyVortexPulse {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1) rotate(0deg);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.1) rotate(180deg);
    }
}

.energy-vortex {
    position: relative;
}

.energy-vortex::before,
.energy-vortex::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

.energy-vortex::before {
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    transform: translate(-50%, -50%);
    background: conic-gradient(
        from 0deg,
        transparent,
        var(--primary) 25%,
        transparent 50%,
        var(--secondary) 75%,
        transparent
    );
    opacity: 0.3;
    filter: blur(40px);
    animation: energyVortex 8s linear infinite;
}

.energy-vortex::after {
    top: 50%;
    left: 50%;
    width: 120%;
    height: 120%;
    transform: translate(-50%, -50%);
    background: conic-gradient(
        from 180deg,
        transparent,
        var(--accent) 25%,
        transparent 50%,
        var(--primary-light) 75%,
        transparent
    );
    opacity: 0.2;
    filter: blur(30px);
    animation: energyVortex 12s linear infinite reverse;
}

/* Mini Energy Vortex for Icons */
.energy-vortex-sm {
    position: relative;
}

.energy-vortex-sm::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    transform: translate(-50%, -50%);
    background: conic-gradient(
        from 0deg,
        transparent,
        var(--glow-primary) 25%,
        transparent 50%,
        var(--glow-secondary) 75%,
        transparent
    );
    opacity: 0;
    filter: blur(20px);
    animation: energyVortex 4s linear infinite;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.energy-vortex-sm:hover::after {
    opacity: 0.5;
}

/* ========== ANTIGRAVITY EFFECT 3: Pyramid Rise (피라미드 상승) ========== */
@keyframes pyramidRise {
    0% {
        opacity: 0;
        transform: translateY(100px) scale(0.8);
        filter: blur(10px);
    }
    30% {
        opacity: 0.5;
        filter: blur(5px);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
        filter: blur(0);
    }
}

@keyframes pyramidRiseStagger {
    0% {
        opacity: 0;
        transform: translateY(60px) rotateX(45deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) rotateX(0deg);
    }
}

.pyramid-rise {
    animation: pyramidRise 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.pyramid-rise-stagger > * {
    opacity: 0;
    animation: pyramidRiseStagger 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

/* Pyramid Rise on Scroll */
.pyramid-rise-scroll {
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ========== Cosmic Background Effects ========== */
@keyframes cosmicPulse {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

@keyframes starTwinkle {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.5);
    }
}

.cosmic-bg {
    position: relative;
    overflow: hidden;
}

.cosmic-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 30%, var(--glow-primary) 0%, transparent 30%),
        radial-gradient(circle at 80% 70%, var(--glow-secondary) 0%, transparent 30%),
        radial-gradient(circle at 50% 50%, var(--glow-accent) 0%, transparent 40%);
    opacity: 0.3;
    animation: cosmicPulse 8s ease-in-out infinite;
    pointer-events: none;
}

/* Star Field */
.star-field {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

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

.star:nth-child(1) { top: 10%; left: 20%; animation-delay: 0s; }
.star:nth-child(2) { top: 20%; left: 80%; animation-delay: 0.5s; }
.star:nth-child(3) { top: 40%; left: 40%; animation-delay: 1s; }
.star:nth-child(4) { top: 60%; left: 70%; animation-delay: 1.5s; }
.star:nth-child(5) { top: 80%; left: 30%; animation-delay: 2s; }
.star:nth-child(6) { top: 15%; left: 60%; animation-delay: 2.5s; }
.star:nth-child(7) { top: 70%; left: 10%; animation-delay: 0.3s; }
.star:nth-child(8) { top: 30%; left: 90%; animation-delay: 0.8s; }

/* ========== Glow Effects ========== */
@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 0 20px var(--glow-primary);
    }
    50% {
        box-shadow: 0 0 40px var(--glow-primary), 0 0 80px var(--glow-secondary);
    }
}

.glow {
    animation: glowPulse 3s ease-in-out infinite;
}

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

.glow-hover:hover {
    box-shadow: 0 0 30px var(--glow-primary), 0 0 60px var(--glow-secondary);
}

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

.text-gradient-animate {
    background: linear-gradient(
        90deg,
        var(--primary),
        var(--secondary),
        var(--accent),
        var(--primary-light),
        var(--primary)
    );
    background-size: 300% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 5s ease infinite;
}

/* ========== Border Animation ========== */
@keyframes borderGlow {
    0%, 100% {
        border-color: var(--primary);
        box-shadow: 0 0 10px var(--glow-primary);
    }
    50% {
        border-color: var(--secondary);
        box-shadow: 0 0 20px var(--glow-secondary);
    }
}

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

/* Rotating Border */
@keyframes rotateBorder {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.rotating-border-container {
    position: relative;
    padding: 3px;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.rotating-border-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        from 0deg,
        var(--primary),
        var(--secondary),
        var(--accent),
        var(--primary)
    );
    animation: rotateBorder 4s linear infinite;
}

.rotating-border-container > * {
    position: relative;
    background: var(--bg-dark);
    border-radius: calc(var(--radius-xl) - 3px);
}

/* ========== Loading Animations ========== */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

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

.loader {
    display: flex;
    gap: var(--space-sm);
}

.loader-dot {
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    animation: dotPulse 1s ease-in-out infinite;
}

.loader-dot:nth-child(2) { animation-delay: 0.2s; }
.loader-dot:nth-child(3) { animation-delay: 0.4s; }

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(102, 126, 234, 0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ========== Progress Bar Animation ========== */
@keyframes progressPulse {
    0% {
        background-position: 0% 0%;
    }
    100% {
        background-position: 200% 0%;
    }
}

.progress-animate {
    background: linear-gradient(
        90deg,
        var(--primary) 0%,
        var(--primary-light) 50%,
        var(--primary) 100%
    );
    background-size: 200% 100%;
    animation: progressPulse 2s linear infinite;
}

/* ========== Slider Animations ========== */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

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

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    14% { transform: scale(1.1); }
    28% { transform: scale(1); }
    42% { transform: scale(1.1); }
    70% { transform: scale(1); }
}

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

.shake { animation: shake 0.5s ease-in-out; }
.heartbeat { animation: heartbeat 1.5s ease-in-out infinite; }
.wiggle { animation: wiggle 0.5s ease-in-out infinite; }

/* ========== Hover Effects ========== */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

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

.hover-glow:hover {
    box-shadow: 0 0 30px var(--glow-primary);
}

.hover-scale {
    transition: transform var(--transition-fast);
}

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

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

.page-transition-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.page-transition-exit {
    opacity: 1;
}

.page-transition-exit-active {
    opacity: 0;
    transition: opacity 0.2s ease;
}

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

    .animate,
    .pyramid-rise-scroll {
        opacity: 1;
        transform: none;
    }
}