/**
 * Animations & Transitions
 * =========================
 */

/* Keyframe Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

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

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

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

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

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

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px var(--accent-glow);
    }
    50% {
        box-shadow: 0 0 40px var(--accent-glow);
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn var(--duration-normal) var(--ease-default);
}

.animate-slide-up {
    animation: slideInUp var(--duration-slow) var(--ease-default);
}

.animate-slide-down {
    animation: slideInDown var(--duration-slow) var(--ease-default);
}

.animate-slide-left {
    animation: slideInLeft var(--duration-slow) var(--ease-default);
}

.animate-slide-right {
    animation: slideInRight var(--duration-slow) var(--ease-default);
}

.animate-scale-in {
    animation: scaleIn var(--duration-slow) var(--ease-bounce);
}

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

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

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

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

.animate-glow {
    animation: glow 2s var(--ease-in-out) infinite;
}

/* Staggered Animation Delays */
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }
.stagger-6 { animation-delay: 300ms; }
.stagger-7 { animation-delay: 350ms; }
.stagger-8 { animation-delay: 400ms; }

/* Transition Utilities */
.transition-none {
    transition: none;
}

.transition-all {
    transition: all var(--duration-normal) var(--ease-default);
}

.transition-colors {
    transition: color var(--duration-fast) var(--ease-default),
                background-color var(--duration-fast) var(--ease-default),
                border-color var(--duration-fast) var(--ease-default);
}

.transition-opacity {
    transition: opacity var(--duration-normal) var(--ease-default);
}

.transition-transform {
    transition: transform var(--duration-normal) var(--ease-default);
}

/* Hover Transforms */
.hover-lift {
    transition: transform var(--duration-normal) var(--ease-default),
                box-shadow var(--duration-normal) var(--ease-default);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-scale {
    transition: transform var(--duration-fast) var(--ease-bounce);
}

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

.hover-scale:active {
    transform: scale(0.98);
}

/* Skeleton Loading Effect */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-card) 25%,
        var(--bg-card-hover) 50%,
        var(--bg-card) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* Page Transitions */
.page-enter {
    opacity: 0;
    transform: translateY(10px);
}

.page-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--duration-slow) var(--ease-default),
                transform var(--duration-slow) var(--ease-default);
}

.page-exit {
    opacity: 1;
}

.page-exit-active {
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-default);
}

/* Card Animation on Load */
.card-animated {
    opacity: 0;
    transform: translateY(20px);
}

.card-animated.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--duration-slow) var(--ease-default),
                transform var(--duration-slow) var(--ease-default);
}

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