/* =============================================
   ATLAS ANIMATIONS CSS
   ============================================= */

/* =============================================
   KEYFRAME ANIMATIONS
   ============================================= */

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

/* Fade Out */
@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* 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);
    }
}

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

/* Slide In Down */
@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Slide In Left */
@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Slide In Right */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

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

/* Scale Up */
@keyframes scaleUp {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.05);
    }
}

/* Scale Down */
@keyframes scaleDown {
    from {
        transform: scale(1.05);
    }
    to {
        transform: scale(1);
    }
}

/* Rotate In */
@keyframes rotateIn {
    from {
        transform: rotate(-180deg) scale(0.5);
        opacity: 0;
    }
    to {
        transform: rotate(0) scale(1);
        opacity: 1;
    }
}

/* Rotate 360 */
@keyframes rotate360 {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Bounce In */
@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
        opacity: 1;
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
        opacity: 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);
    }
}

/* Pulse Border */
@keyframes pulseBorder {
    0% {
        box-shadow: 0 0 0 0 rgba(88, 204, 2, 0.4);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(88, 204, 2, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(88, 204, 2, 0);
    }
}

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

/* Wiggle */
@keyframes wiggle {
    0%, 100% {
        transform: rotate(-3deg);
    }
    50% {
        transform: rotate(3deg);
    }
}

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

/* Loading Spinner */
@keyframes loadingSpinner {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Dot Pulse */
@keyframes dotPulse {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Skeleton Loading */
@keyframes skeletonLoading {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

/* Progress Fill */
@keyframes progressFill {
    from {
        width: 0;
    }
}

/* XP Pop */
@keyframes xpPop {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.3);
    }
    100% {
        transform: scale(1);
    }
}

/* Streak Flame */
@keyframes streakFlame {
    0%, 100% {
        transform: scale(1) rotate(-5deg);
    }
    50% {
        transform: scale(1.1) rotate(5deg);
    }
}

/* Heart Beat */
@keyframes heartBeat {
    0%, 100% {
        transform: scale(1);
    }
    14% {
        transform: scale(1.3);
    }
    28% {
        transform: scale(1);
    }
    42% {
        transform: scale(1.3);
    }
    70% {
        transform: scale(1);
    }
}

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

/* Glow */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(88, 204, 2, 0.5);
    }
    50% {
        box-shadow: 0 0 25px rgba(88, 204, 2, 0.8);
    }
}

/* =============================================
   ANIMATION CLASSES
   ============================================= */

/* Base Animation Classes */
.animate-fade-in {
    animation: fadeIn var(--transition-base) ease forwards;
}

.animate-fade-out {
    animation: fadeOut var(--transition-base) ease forwards;
}

.animate-fade-in-up {
    animation: fadeInUp var(--transition-base) ease forwards;
}

.animate-fade-in-down {
    animation: fadeInDown var(--transition-base) ease forwards;
}

.animate-fade-in-left {
    animation: fadeInLeft var(--transition-base) ease forwards;
}

.animate-fade-in-right {
    animation: fadeInRight var(--transition-base) ease forwards;
}

.animate-scale-in {
    animation: scaleIn var(--transition-base) ease forwards;
}

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

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

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

.animate-wiggle {
    animation: wiggle 0.5s ease-in-out infinite;
}

/* Animation Delays */
.animate-delay-100 { animation-delay: 100ms; }
.animate-delay-200 { animation-delay: 200ms; }
.animate-delay-300 { animation-delay: 300ms; }
.animate-delay-400 { animation-delay: 400ms; }
.animate-delay-500 { animation-delay: 500ms; }
.animate-delay-600 { animation-delay: 600ms; }
.animate-delay-700 { animation-delay: 700ms; }
.animate-delay-800 { animation-delay: 800ms; }
.animate-delay-900 { animation-delay: 900ms; }
.animate-delay-1000 { animation-delay: 1000ms; }

/* Animation Durations */
.animate-fast { animation-duration: 150ms; }
.animate-base { animation-duration: 250ms; }
.animate-slow { animation-duration: 350ms; }
.animate-x-slow { animation-duration: 500ms; }

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */

/* Scroll Animation Base */
.animate-on-scroll {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
    will-change: opacity, transform;
}

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

/* Scroll Direction Classes */
.animate-scroll-fade-up {
    opacity: 0;
    transform: translateY(50px);
}

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

.animate-scroll-fade-down {
    opacity: 0;
    transform: translateY(-50px);
}

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

.animate-scroll-fade-left {
    opacity: 0;
    transform: translateX(50px);
}

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

.animate-scroll-fade-right {
    opacity: 0;
    transform: translateX(-50px);
}

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

.animate-scroll-scale {
    opacity: 0;
    transform: scale(0.8);
}

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

/* =============================================
   STAGGER ANIMATIONS
   ============================================= */

/* Stagger Container */
.stagger-animation {
    opacity: 0;
}

.stagger-animation.is-visible .stagger-item {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger Items */
.stagger-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-item:nth-child(1) { transition-delay: 0ms; }
.stagger-item:nth-child(2) { transition-delay: 100ms; }
.stagger-item:nth-child(3) { transition-delay: 200ms; }
.stagger-item:nth-child(4) { transition-delay: 300ms; }
.stagger-item:nth-child(5) { transition-delay: 400ms; }
.stagger-item:nth-child(6) { transition-delay: 500ms; }
.stagger-item:nth-child(7) { transition-delay: 600ms; }
.stagger-item:nth-child(8) { transition-delay: 700ms; }
.stagger-item:nth-child(9) { transition-delay: 800ms; }
.stagger-item:nth-child(10) { transition-delay: 900ms; }
.stagger-item:nth-child(11) { transition-delay: 1000ms; }
.stagger-item:nth-child(12) { transition-delay: 1100ms; }

/* =============================================
   HOVER ANIMATIONS
   ============================================= */

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

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

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

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

/* Hover Scale In */
.hover-scale-in {
    transition: transform var(--transition-base);
}

.hover-scale-in:hover {
    transform: scale(0.95);
}

/* Hover Rotate */
.hover-rotate {
    transition: transform var(--transition-base);
}

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

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

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(88, 204, 2, 0.5);
}

/* Hover Border Pulse */
.hover-border-pulse:hover {
    animation: pulseBorder 1.5s ease infinite;
}

/* Hover Shimmer */
.hover-shimmer {
    position: relative;
    overflow: hidden;
}

.hover-shimmer::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    transition: left var(--transition-base);
}

.hover-shimmer:hover::after {
    left: 100%;
}

/* =============================================
   BUTTON ANIMATIONS
   ============================================= */

/* Button Press */
.btn-press:active {
    transform: scale(0.95);
}

/* Button Ripple */
.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%);
    opacity: 0;
}

.btn-ripple:active::after {
    width: 300px;
    height: 300px;
    opacity: 1;
    transition: width 0.3s ease-out, height 0.3s ease-out, opacity 0.3s ease-out;
}

/* =============================================
   CARD ANIMATIONS
   ============================================= */

/* Card Flip Container */
.card-flip-container {
    perspective: 1000px;
}

.card-flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s ease;
    transform-style: preserve-3d;
}

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

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

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

/* Card Entrance */
.card-entrance {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.card-entrance.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* =============================================
   MODAL ANIMATIONS
   ============================================= */

/* Modal Fade In */
.modal-fade-in {
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal-fade-in.is-active {
    opacity: 1;
}

/* Modal Scale In */
.modal-scale-in {
    opacity: 0;
    transform: scale(0.8);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.modal-scale-in.is-active {
    opacity: 1;
    transform: scale(1);
}

/* Modal Slide In Up */
.modal-slide-up {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.modal-slide-up.is-active {
    opacity: 1;
    transform: translateY(0);
}

/* Modal Backdrop Fade */
.modal-backdrop {
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal-backdrop.is-active {
    opacity: 1;
}

/* =============================================
   LOADING ANIMATIONS
   ============================================= */

/* Loading Spinner */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary-green);
    border-radius: 50%;
    animation: loadingSpinner 0.8s linear infinite;
}

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

.loading-dots span {
    width: 12px;
    height: 12px;
    background-color: var(--primary-green);
    border-radius: 50%;
    animation: dotPulse 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; }
.loading-dots span:nth-child(3) { animation-delay: 0s; }

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--gray-200) 0px,
        var(--gray-100) 40px,
        var(--gray-200) 80px
    );
    background-size: 200px 100%;
    animation: skeletonLoading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.skeleton-button {
    width: 120px;
    height: 40px;
    border-radius: var(--radius-lg);
}

/* =============================================
   PROGRESS ANIMATIONS
   ============================================= */

/* Progress Bar Fill */
.progress-fill {
    animation: progressFill 1s ease-out forwards;
}

/* Progress Bar Pulse */
.progress-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* XP Counter */
.xp-count {
    animation: xpPop 0.3s ease-out;
}

/* Streak Flame Animation */
.streak-flame {
    animation: streakFlame 1s ease-in-out infinite;
}

/* =============================================
   NOTIFICATION ANIMATIONS
   ============================================= */

/* Toast Slide In */
.toast-slide-in {
    animation: slideInRight 0.3s ease forwards;
}

/* Toast Fade Out */
.toast-fade-out {
    animation: fadeOut 0.3s ease forwards;
}

/* Notification Pulse */
.notification-pulse {
    animation: pulseBorder 1.5s ease infinite;
}

/* =============================================
   NAVIGATION ANIMATIONS
   ============================================= */

/* Nav Menu Slide */
.nav-menu-slide {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
}

.nav-menu-slide.is-open {
    transform: translateX(0);
}

/* Nav Item Hover Underline */
.nav-underline {
    position: relative;
}

.nav-underline::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-green);
    transition: width var(--transition-fast);
}

.nav-underline:hover::after,
.nav-underline.active::after {
    width: 100%;
}

/* =============================================
   UTILITY ANIMATIONS
   ============================================= */

/* Hidden/Shown */
.hidden {
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.hidden.is-visible {
    opacity: 1;
    visibility: visible;
}

/* Fade In on Load */
.fade-in-load {
    animation: fadeIn 0.5s ease forwards;
}

/* Entrance Animation Classes */
.entrance-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s ease forwards;
}

.entrance-down {
    opacity: 0;
    transform: translateY(-20px);
    animation: fadeInDown 0.5s ease forwards;
}

.entrance-left {
    opacity: 0;
    transform: translateX(-20px);
    animation: fadeInLeft 0.5s ease forwards;
}

.entrance-right {
    opacity: 0;
    transform: translateX(20px);
    animation: fadeInRight 0.5s ease forwards;
}

.entrance-scale {
    opacity: 0;
    transform: scale(0.9);
    animation: scaleIn 0.5s ease forwards;
}

/* =============================================
   RESPONSIVE ANIMATIONS
   ============================================= */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .animate-on-scroll {
        opacity: 1 !important;
        transform: none !important;
    }
    
    .stagger-item {
        opacity: 1 !important;
        transform: none !important;
    }
}