/* ==========================================
   ANIMATIONS & KEYFRAMES
   ========================================== */

/* ==========================================
   KEYFRAME DEFINITIONS
   ========================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideLeft {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideRight {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes scaleOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

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

@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);
    }
}

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

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

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

.animate-fadeOut {
    animation: fadeOut 0.6s ease-out;
}

.animate-slideUp {
    animation: slideUp 0.6s ease-out;
}

.animate-slideDown {
    animation: slideDown 0.6s ease-out;
}

.animate-slideLeft {
    animation: slideLeft 0.6s ease-out;
}

.animate-slideRight {
    animation: slideRight 0.6s ease-out;
}

.animate-scaleIn {
    animation: scaleIn 0.4s ease-out;
}

.animate-scaleOut {
    animation: scaleOut 0.4s ease-out;
}

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

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

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

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

.animate-shake {
    animation: shake 0.5s;
}

/* ==========================================
   SCROLL-TRIGGERED ANIMATIONS
   ========================================== */

.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Scroll Animation Variants */
.scroll-animate-slow {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.scroll-animate-fast {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

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

/* Scroll Animation Delays */
.scroll-animate-delay-100 {
    transition-delay: 0.1s;
}

.scroll-animate-delay-200 {
    transition-delay: 0.2s;
}

.scroll-animate-delay-300 {
    transition-delay: 0.3s;
}

.scroll-animate-delay-400 {
    transition-delay: 0.4s;
}

.scroll-animate-delay-500 {
    transition-delay: 0.5s;
}

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

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

.hover-lift:hover {
    transform: translateY(-4px);
}

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

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

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

.hover-scale-sm:hover {
    transform: scale(1.02);
}

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

.hover-glow:hover {
    box-shadow: var(--shadow-xl), var(--shadow-glow-blue);
}

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

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

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

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

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

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

.transition-colors {
    transition: color var(--transition-base), background-color var(--transition-base),
                border-color var(--transition-base);
}

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

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

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

.loading-spinner {
    border: 3px solid var(--slate-200);
    border-top-color: var(--blue-600);
    border-radius: var(--rounded-full);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

.loading-dots {
    display: flex;
    gap: var(--spacing-2);
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--blue-600);
    border-radius: var(--rounded-full);
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) {
    animation-delay: -0.32s;
}

.loading-dots span:nth-child(2) {
    animation-delay: -0.16s;
}

/* ==========================================
   REDUCED MOTION
   Respect user preferences for 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;
    }

    .scroll-animate,
    .scroll-animate-slow,
    .scroll-animate-fast {
        opacity: 1;
        transform: none;
        transition: none;
    }
}