/* ============================================
   Animation Styles
   ============================================ */

/* ============================================
   Scroll Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-up {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-left {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-right {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger animation delay */
.stagger-1 {
    transition-delay: 0.1s;
}

.stagger-2 {
    transition-delay: 0.2s;
}

.stagger-3 {
    transition-delay: 0.3s;
}

.stagger-4 {
    transition-delay: 0.4s;
}

/* ============================================
   Loading Animations
   ============================================ */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-secondary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

.loading {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
}

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

.loading-dot {
    width: 8px;
    height: 8px;
    background: var(--color-secondary);
    border-radius: var(--radius-full);
    animation: bounce 1.4s infinite ease-in-out both;
}

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

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

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

/* ============================================
   Skeleton Screens
   ============================================ */
.skeleton {
    background: linear-gradient(90deg, var(--color-gray-100) 25%, var(--color-gray-200) 50%, var(--color-gray-100) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

.skeleton-card {
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.skeleton-title {
    height: 24px;
    width: 70%;
    margin-bottom: var(--space-4);
}

.skeleton-text {
    height: 16px;
    margin-bottom: var(--space-3);
}

.skeleton-text:last-child {
    width: 50%;
}

/* ============================================
   Hover Animations
   ============================================ */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

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

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

.hover-shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s ease;
}

.hover-shine:hover::before {
    left: 150%;
}

/* ============================================
   Page Transition
   ============================================ */
.page-transition {
    animation: fade-in-page 0.5s ease;
}

@keyframes fade-in-page {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   Smooth Scroll
   ============================================ */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

/* ============================================
   Pulse Animation
   ============================================ */
.pulse {
    animation: pulse-animation 2s ease-in-out infinite;
}

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

/* ============================================
   Shake Animation (for errors)
   ============================================ */
.shake {
    animation: shake-animation 0.5s ease;
}

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

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

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

.ripple:active::after {
    width: 300px;
    height: 300px;
}

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