/*
 * animations.css - 애니메이션 스타일시트
 * 궁금하면클릭해봐용 - 100문 100답 플랫폼
 * 위치: /assets/css/animations.css
 */

/* ========== COSMIC PARTICLE SYSTEM ========== */
.particle {
    position: fixed;
    pointer-events: none;
    border-radius: 50%;
    opacity: 0;
    z-index: 0;
}

.particle-star {
    width: 2px;
    height: 2px;
    background: white;
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.8);
    animation: starTwinkle 3s ease-in-out infinite;
}

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

/* ========== AURORA BACKGROUND ========== */
.aurora {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    overflow: hidden;
    pointer-events: none;
}

.aurora-wave {
    position: absolute;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 0%,
        rgba(102, 126, 234, 0.1) 25%,
        rgba(118, 75, 162, 0.1) 50%,
        rgba(240, 147, 251, 0.1) 75%,
        transparent 100%
    );
    animation: auroraWave 15s ease-in-out infinite;
}

.aurora-wave:nth-child(2) {
    animation-delay: -5s;
    opacity: 0.7;
}

.aurora-wave:nth-child(3) {
    animation-delay: -10s;
    opacity: 0.5;
}

@keyframes auroraWave {
    0%, 100% {
        transform: translate(-25%, -25%) rotate(0deg);
    }
    50% {
        transform: translate(-25%, -25%) rotate(180deg);
    }
}

/* ========== FLOATING ELEMENTS ========== */
.float-element {
    animation: floatAnimation 6s ease-in-out infinite;
}

.float-element:nth-child(odd) {
    animation-delay: -3s;
}

@keyframes floatAnimation {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-20px) rotate(5deg);
    }
    75% {
        transform: translateY(20px) rotate(-5deg);
    }
}

/* ========== GLOW PULSE ========== */
.glow-pulse {
    animation: glowPulse 2s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(102, 126, 234, 0.4);
    }
    50% {
        box-shadow: 0 0 40px rgba(102, 126, 234, 0.8),
                    0 0 60px rgba(118, 75, 162, 0.4);
    }
}

/* ========== TEXT REVEAL ========== */
.text-reveal {
    overflow: hidden;
}

.text-reveal span {
    display: inline-block;
    transform: translateY(100%);
    animation: textReveal 0.8s cubic-bezier(0.6, 0, 0.2, 1) forwards;
}

@keyframes textReveal {
    to {
        transform: translateY(0);
    }
}

/* Stagger text reveal */
.text-reveal span:nth-child(1) { animation-delay: 0.1s; }
.text-reveal span:nth-child(2) { animation-delay: 0.2s; }
.text-reveal span:nth-child(3) { animation-delay: 0.3s; }
.text-reveal span:nth-child(4) { animation-delay: 0.4s; }
.text-reveal span:nth-child(5) { animation-delay: 0.5s; }

/* ========== TYPING EFFECT ========== */
.typing-effect {
    overflow: hidden;
    white-space: nowrap;
    border-right: 3px solid var(--primary);
    animation: typing 3s steps(30) forwards, blinkCursor 0.8s step-end infinite;
}

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

@keyframes blinkCursor {
    50% { border-color: transparent; }
}

/* ========== MORPH SHAPE ========== */
.morph-shape {
    animation: morphShape 8s ease-in-out infinite;
}

@keyframes morphShape {
    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% 70% 50% 40%;
    }
    75% {
        border-radius: 60% 40% 60% 30% / 70% 40% 60% 50%;
    }
}

/* ========== SLIDE IN ANIMATIONS ========== */
.slide-in-left {
    animation: slideInLeft 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.slide-in-right {
    animation: slideInRight 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.slide-in-up {
    animation: slideInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.slide-in-down {
    animation: slideInDown 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

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

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(100px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ========== SCALE ANIMATIONS ========== */
.scale-in {
    animation: scaleIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.scale-out {
    animation: scaleOut 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

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

/* ========== ROTATE ANIMATIONS ========== */
.rotate-in {
    animation: rotateIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-90deg) scale(0.5);
    }
    to {
        opacity: 1;
        transform: rotate(0deg) scale(1);
    }
}

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

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

/* ========== BOUNCE ANIMATIONS ========== */
.bounce {
    animation: bounce 1s ease infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
        animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
    }
    50% {
        transform: translateY(-25%);
        animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    }
}

.bounce-in {
    animation: bounceIn 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.1);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

/* ========== SHAKE ANIMATION ========== */
.shake {
    animation: shake 0.5s ease-in-out;
}

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

/* ========== RIPPLE EFFECT ========== */
.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: scale(1) translate(-50%, -50%);
    transform-origin: center;
}

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

@keyframes rippleEffect {
    0% {
        transform: scale(0) translate(-50%, -50%);
        opacity: 1;
    }
    100% {
        transform: scale(40) translate(-50%, -50%);
        opacity: 0;
    }
}

/* ========== CARD FLIP ========== */
.flip-card {
    perspective: 1000px;
}

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

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

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
}

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

/* ========== PROGRESS ANIMATION ========== */
.progress-bar {
    height: 8px;
    background: var(--bg-glass);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-cosmic);
    border-radius: var(--radius-full);
    transition: width 0.5s ease-out;
    animation: progressShine 2s ease-in-out infinite;
}

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

/* ========== SKELETON LOADING ========== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-glass) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        var(--bg-glass) 100%
    );
    background-size: 200% 100%;
    animation: skeletonLoading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

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

/* ========== NUMBER COUNTER ========== */
.counter-animate {
    display: inline-block;
    font-variant-numeric: tabular-nums;
}

/* ========== SCROLL REVEAL ========== */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

[data-reveal="left"] {
    transform: translateX(-50px);
}

[data-reveal="left"].revealed {
    transform: translateX(0);
}

[data-reveal="right"] {
    transform: translateX(50px);
}

[data-reveal="right"].revealed {
    transform: translateX(0);
}

[data-reveal="scale"] {
    transform: scale(0.9);
}

[data-reveal="scale"].revealed {
    transform: scale(1);
}

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

.hover-lift:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.hover-glow:hover {
    box-shadow: 0 0 30px rgba(102, 126, 234, 0.5);
}

.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);
}

/* ========== MAGNETIC EFFECT ========== */
.magnetic {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== GRADIENT TEXT ANIMATION ========== */
.gradient-text-animate {
    background: linear-gradient(
        90deg,
        var(--primary) 0%,
        var(--accent) 25%,
        var(--secondary) 50%,
        var(--accent) 75%,
        var(--primary) 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientFlow 3s linear infinite;
}

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

/* ========== STAGGER CHILDREN ========== */
.stagger-children > * {
    opacity: 0;
    animation: fadeInUp 0.5s ease forwards;
}

.stagger-children > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.6s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.7s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.8s; }
.stagger-children > *:nth-child(9) { animation-delay: 0.9s; }
.stagger-children > *:nth-child(10) { animation-delay: 1s; }

/* ========== CONFETTI ========== */
.confetti {
    position: fixed;
    top: -10px;
    z-index: 9999;
    pointer-events: none;
}

.confetti-piece {
    position: absolute;
    width: 10px;
    height: 10px;
    animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ========== SUCCESS/ERROR ANIMATIONS ========== */
.success-checkmark {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: block;
    stroke-width: 2;
    stroke: #4caf50;
    stroke-miterlimit: 10;
    box-shadow: inset 0px 0px 0px #4caf50;
    animation: fillSuccess 0.4s ease-in-out 0.4s forwards,
               scaleSuccess 0.3s ease-in-out 0.9s both;
}

@keyframes fillSuccess {
    100% {
        box-shadow: inset 0px 0px 0px 30px rgba(76, 175, 80, 0.2);
    }
}

@keyframes scaleSuccess {
    0%, 100% { transform: none; }
    50% { transform: scale3d(1.1, 1.1, 1); }
}