/* ===================================
   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);
    }
}

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

/* Slide In Left */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Slide In Right */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Floating Hearts */
@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) translateX(50px) rotate(360deg);
        opacity: 0;
    }
}

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

/* Shimmer */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Bounce */
@keyframes bounce {
    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 5px rgba(184, 230, 213, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(184, 230, 213, 0.8), 0 0 30px rgba(212, 175, 55, 0.6);
    }
}

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

/* Basic Animations */
.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

.fade-in-down {
    animation: fadeInDown 0.8s ease-out;
}

.scale-in {
    animation: scaleIn 0.6s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.8s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.8s ease-out;
}

/* Staggered Animations */
.fade-in-up:nth-child(1) { animation-delay: 0.1s; }
.fade-in-up:nth-child(2) { animation-delay: 0.2s; }
.fade-in-up:nth-child(3) { animation-delay: 0.3s; }
.fade-in-up:nth-child(4) { animation-delay: 0.4s; }
.fade-in-up:nth-child(5) { animation-delay: 0.5s; }
.fade-in-up:nth-child(6) { animation-delay: 0.6s; }

/* Floating Hearts Animation */
.floating-hearts {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
}

.floating-hearts .heart {
    position: absolute;
    bottom: -50px;
    font-size: 2rem;
    animation: float 15s infinite;
    opacity: 0;
}

.floating-hearts .heart:nth-child(1) {
    left: 10%;
    animation-duration: 12s;
    animation-delay: 0s;
}

.floating-hearts .heart:nth-child(2) {
    left: 30%;
    animation-duration: 15s;
    animation-delay: 2s;
    font-size: 1.5rem;
}

.floating-hearts .heart:nth-child(3) {
    left: 50%;
    animation-duration: 18s;
    animation-delay: 4s;
    font-size: 2.5rem;
}

.floating-hearts .heart:nth-child(4) {
    left: 70%;
    animation-duration: 14s;
    animation-delay: 6s;
    font-size: 1.8rem;
}

.floating-hearts .heart:nth-child(5) {
    left: 90%;
    animation-duration: 16s;
    animation-delay: 8s;
    font-size: 2rem;
}

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

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

.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 {
    animation: glow 2s infinite;
}

/* Scroll Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease-out;
}

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

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s ease-out;
}

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

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.6s ease-out;
}

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

/* Loading Animations */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-secondary);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: rotate 1s linear infinite;
}

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

/* Shimmer Effect */
.shimmer {
    background: linear-gradient(
        90deg,
        var(--color-secondary) 0%,
        var(--color-primary) 50%,
        var(--color-secondary) 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* Bounce Effect */
.bounce {
    animation: bounce 1s ease-in-out infinite;
}

/* ===================================
   TRANSITION UTILITIES
   =================================== */

.transition-fast {
    transition: all var(--transition-fast);
}

.transition-base {
    transition: all var(--transition-base);
}

.transition-slow {
    transition: all var(--transition-slow);
}

/* ===================================
   SPECIAL EFFECTS
   =================================== */

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, var(--color-text-dark), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Glass Effect */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

/* Parallax */
.parallax {
    transform: translateZ(0);
    will-change: transform;
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

/* ===================================
   PAGE TRANSITIONS
   =================================== */

.page-enter {
    animation: fadeInUp 0.6s ease-out;
}

.page-exit {
    animation: fadeIn 0.4s ease-out reverse;
}

/* ===================================
   INTERACTIVE ANIMATIONS
   =================================== */

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

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    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);
}

/* Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(184, 230, 213, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.ripple:active::after {
    width: 200%;
    height: 200%;
}

/* ===================================
   ACCESSIBILITY
   =================================== */

/* Respect user motion preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating-hearts .heart {
        animation: none;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* ===================================
   CUSTOM ENTRANCE ANIMATIONS
   =================================== */

/* Timeline Items */
.timeline-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.timeline-item.show {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(odd).show {
    animation: slideInLeft 0.8s ease-out forwards;
}

.timeline-item:nth-child(even).show {
    animation: slideInRight 0.8s ease-out forwards;
}

/* Gallery Items */
.gallery-item {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.6s ease-out;
}

.gallery-item.show {
    opacity: 1;
    transform: scale(1);
}

/* Note Cards */
.note-card {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease-out;
}

.note-card.show {
    opacity: 1;
    transform: translateY(0);
}

/* Game Cards */
.game-card {
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.6s ease-out;
}

.game-card.show {
    opacity: 1;
    transform: scale(1);
}

/* ===================================
   LOADING STATES
   =================================== */

.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    border: 3px solid var(--color-secondary);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: rotate 1s linear infinite;
}

/* ===================================
   MICROINTERACTIONS
   =================================== */

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

/* Checkbox Animation */
input[type="checkbox"] {
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

input[type="checkbox"]:checked {
    animation: bounce 0.3s ease;
}

/* Focus Rings */
*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ===================================
   SPECIAL SEASONAL EFFECTS
   =================================== */

/* Confetti Effect (for celebrations) */
@keyframes confetti-fall {
    0% {
        transform: translateY(-100vh) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    background: var(--color-accent);
    animation: confetti-fall 3s linear;
    pointer-events: none;
}

/* Sparkle Effect */
@keyframes sparkle {
    0%, 100% {
        opacity: 0;
        transform: scale(0);
    }
    50% {
        opacity: 1;
        transform: scale(1);
    }
}

.sparkle {
    animation: sparkle 1.5s ease-in-out infinite;
}