/* ================================================
   ANIMATIONS - Smooth Transitions & Effects
   Gamification Feedback
   ================================================ */

/* ================== KEYFRAME 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 slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

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

@keyframes glow-pulse {
    0%, 100% {
        box-shadow: 0 0 5px rgba(74, 144, 226, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(74, 144, 226, 0.8);
    }
}

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

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

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

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

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

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

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

.animate-bounce-in {
    animation: bounceIn 0.8s ease-out;
}

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

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

.animate-rotate {
    animation: rotate 2s linear infinite;
}

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

.animate-float {
    animation: float 3s 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-lg);
}

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

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

.hover-tilt {
    transition: transform var(--transition-base);
}

.hover-tilt:hover {
    transform: perspective(1000px) rotateX(5deg) rotateY(5deg);
}

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

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(74, 144, 226, 0.6);
}

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

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-light);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: rotate 1s linear infinite;
}

.dots-loading {
    display: inline-flex;
    gap: 0.5rem;
}

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

.dots-loading span:nth-child(2) {
    animation-delay: 0.2s;
}

.dots-loading span:nth-child(3) {
    animation-delay: 0.4s;
}

/* ================== SUCCESS/ERROR FEEDBACK ================== */

.success-animation {
    animation: bounceIn 0.6s ease-out;
    border: 2px solid var(--primary-green);
}

.error-animation {
    animation: shake 0.5s ease-in-out;
    border: 2px solid var(--primary-pink);
}

/* ================== STAGGERED ANIMATIONS ================== */

.stagger-item {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

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

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

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

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

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

/* ================== REDUCED MOTION ================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}