/* ============================================
   ANIMATIONS - Micro-interactions & Transitions
   ============================================ */

/* ============================================
   FADE IN ANIMATIONS
   ============================================ */

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   SLIDE ANIMATIONS
   ============================================ */

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

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

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

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

/* ============================================
   SCALE ANIMATIONS
   ============================================ */

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

@keyframes scaleOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.9);
    }
}

/* ============================================
   PULSE ANIMATIONS
   ============================================ */

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

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

/* ============================================
   SPIN ANIMATION
   ============================================ */

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

/* ============================================
   SHIMMER ANIMATION
   ============================================ */

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

.shimmer {
    animation: shimmer 2s infinite;
    background: linear-gradient(
        to right,
        var(--surface-primary) 0%,
        var(--surface-hover) 50%,
        var(--surface-primary) 100%
    );
    background-size: 1000px 100%;
}

/* ============================================
   BOUNCE ANIMATION
   ============================================ */

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* ============================================
   SHAKE ANIMATION (for errors)
   ============================================ */

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

.shake {
    animation: shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

/* ============================================
   GLOW ANIMATION
   ============================================ */

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px var(--accent-primary);
    }
    50% {
        box-shadow: 0 0 20px var(--accent-primary);
    }
}

/* ============================================
   GRADIENT ANIMATION
   ============================================ */

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.gradient-animated {
    background-size: 200% 200%;
    animation: gradientShift 3s ease infinite;
}

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

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

.animate-fade-in-up {
    animation: fadeInUp 0.5s ease-out;
}

.animate-fade-in-down {
    animation: fadeInDown 0.5s ease-out;
}

.animate-slide-in-right {
    animation: slideInRight 0.5s ease-out;
}

.animate-slide-in-left {
    animation: slideInLeft 0.5s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.3s ease-out;
}

.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;
}

/* ============================================
   HOVER EFFECTS
   ============================================ */

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

.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

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

.hover-glow:hover {
    box-shadow: 0 0 20px var(--accent-primary);
}

/* ============================================
   FOCUS EFFECTS
   ============================================ */

.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.focus-ring-accent:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.3);
}

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

@keyframes progressIndeterminate {
    0% {
        left: -50%;
    }
    100% {
        left: 100%;
    }
}

.progress-indeterminate {
    position: relative;
    overflow: hidden;
}

.progress-indeterminate::after {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    animation: progressIndeterminate 1.5s ease-in-out infinite;
}

/* ============================================
   SKELETON LOADING
   ============================================ */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--surface-secondary) 0%,
        var(--surface-hover) 50%,
        var(--surface-secondary) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 1em;
    margin-bottom: var(--space-sm);
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: var(--space-md);
}

.skeleton-paragraph {
    height: 0.875em;
}

/* ============================================
   TOOLTIP ANIMATIONS
   ============================================ */

@keyframes tooltipSlideIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tooltip {
    animation: tooltipSlideIn 0.2s ease-out;
}

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

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

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

.notification-enter {
    animation: notificationSlideIn 0.3s ease-out;
}

.notification-exit {
    animation: notificationSlideOut 0.3s ease-out;
}

/* ============================================
   TYPING INDICATOR
   ============================================ */

.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: var(--space-md);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-tertiary);
    border-radius: var(--radius-full);
    animation: typingBounce 1.4s infinite ease-in-out both;
}

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

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

@keyframes typingBounce {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-10px);
    }
}

/* ============================================
   RIPPLE EFFECT
   ============================================ */

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    animation: ripple 0.6s ease-out;
}

/* ============================================
   REDUCE MOTION
   ============================================ */

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