/**
 * Animations & Microinteractions
 * Academic Legal Website
 * 
 * Subtle, meaningful animations that enhance user experience
 * Respects prefers-reduced-motion
 */

/* ============================================================================
   FADE IN ON SCROLL ANIMATION
   ========================================================================= */

/* Elements that will fade in when scrolled into view */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Stagger animation for multiple items */
.fade-in:nth-child(1) { transition-delay: 0s; }
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }
.fade-in:nth-child(5) { transition-delay: 0.4s; }
.fade-in:nth-child(6) { transition-delay: 0.5s; }

/* ============================================================================
   CARD HOVER ENHANCEMENTS (Already in cards.css, refinements here)
   ========================================================================= */

/* Smooth card lift - already implemented in cards.css */
/* Additional subtle scale on feature card icons */
.card-feature:hover .feature-icon {
    transform: scale(1.1);
    transition: transform var(--transition-normal);
}

.feature-icon {
    transition: transform var(--transition-normal);
}

/* Image zoom on hover - already in cards.css */

/* ============================================================================
   BUTTON ANIMATIONS (Already in buttons.css, refinements here)
   ========================================================================= */

/* Button press effect - already implemented */
/* Add subtle ripple effect on click (optional enhancement) */

/* ============================================================================
   LINK UNDERLINE ANIMATION
   ========================================================================= */

/* Animated underline for text links */
.link-animated {
    position: relative;
    text-decoration: none;
}

.link-animated::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: currentColor;
    transition: width var(--transition-normal);
}

.link-animated:hover::after {
    width: 100%;
}

/* ============================================================================
   LOADING STATES
   ========================================================================= */

/* Spinner animation for loading states */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.spinner {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

.spinner-sm {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

.spinner-lg {
    width: 2rem;
    height: 2rem;
    border-width: 4px;
}

/* ============================================================================
   SKELETON SCREENS (Loading placeholders)
   ========================================================================= */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--light-bg) 0%,
        var(--border-light) 50%,
        var(--light-bg) 100%
    );
    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-text {
    height: 1rem;
    margin-bottom: var(--space-sm);
}

.skeleton-title {
    height: 2rem;
    width: 60%;
    margin-bottom: var(--space-md);
}

.skeleton-card {
    height: 300px;
}

/* ============================================================================
   PULSE ANIMATION (for notifications, badges)
   ========================================================================= */

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

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

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

@keyframes slide-in-right {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slide-in-left {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

/* ============================================================================
   BOUNCE ANIMATION (for success indicators)
   ========================================================================= */

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

.bounce {
    animation: bounce 1s ease;
}

/* ============================================================================
   SHAKE ANIMATION (for error states)
   ========================================================================= */

@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 ease;
}

/* ============================================================================
   FADE IN ANIMATION
   ========================================================================= */

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

.fade-in-slow {
    animation: fade-in 1s ease-out;
}

/* ============================================================================
   PROGRESS BAR ANIMATION (for loading)
   ========================================================================= */

@keyframes progress {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.progress-bar {
    position: relative;
    width: 100%;
    height: 4px;
    background-color: var(--light-bg);
    overflow: hidden;
    border-radius: var(--radius-full);
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background-color: var(--accent);
    animation: progress 1.5s ease-in-out infinite;
}

/* ============================================================================
   NOTIFICATION SLIDE IN
   ========================================================================= */

.notification {
    position: fixed;
    top: var(--space-xl);
    right: var(--space-xl);
    max-width: 400px;
    padding: var(--space-md) var(--space-lg);
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-notification);
    animation: slide-in-right 0.3s ease-out;
}

.notification.success {
    border-left: 4px solid var(--success);
}

.notification.error {
    border-left: 4px solid var(--error);
}

.notification.info {
    border-left: 4px solid var(--info);
}

/* ============================================================================
   TOOLTIP ANIMATION
   ========================================================================= */

.tooltip {
    position: absolute;
    padding: var(--space-xs) var(--space-sm);
    background-color: var(--primary-dark);
    color: var(--white);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    white-space: nowrap;
    z-index: var(--z-tooltip);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    pointer-events: none;
}

.tooltip.show {
    opacity: 1;
    visibility: visible;
}

/* ============================================================================
   SCROLL PROGRESS INDICATOR
   ========================================================================= */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--primary) 100%);
    z-index: var(--z-fixed);
    transition: width 0.1s ease-out;
}

/* ============================================================================
   HOVER LIFT ENHANCEMENT
   ========================================================================= */

/* Subtle lift on interactive elements */
.hover-lift {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

/* ============================================================================
   FOCUS PULSE ANIMATION
   ========================================================================= */

@keyframes focus-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(49, 130, 206, 0.4);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(49, 130, 206, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(49, 130, 206, 0);
    }
}

/* Apply to important CTAs */
.btn-primary:focus-visible {
    animation: focus-pulse 1.5s infinite;
}

/* ============================================================================
   RESPECT USER MOTION PREFERENCES
   ========================================================================= */

/* This is already in base.css, but reiterating here for emphasis */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .fade-in,
    .hover-lift,
    .skeleton,
    .pulse,
    .bounce,
    .shake {
        animation: none !important;
        transition: none !important;
    }
    
    /* Keep immediate visual feedback but no animation */
    .card:hover {
        transform: none;
    }
}

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

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

.animate-slide-up {
    animation: slide-in-up 0.3s ease-out;
}

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

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

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

/* ============================================================================
   DARK MODE LOGO FIX - FINAL OVERRIDE
   This MUST be at the end of the last CSS file to ensure it works
   ========================================================================= */

[data-theme="dark"] .logo-image,
[data-theme="dark"] .site-logo .logo-image,
[data-theme="dark"] .site-logo > .logo-image,
html[data-theme="dark"] .logo-image {
    filter: brightness(0) invert(1) !important;
}

[data-theme="dark"] .mobile-logo-image,
[data-theme="dark"] .mobile-nav .mobile-logo-image,
html[data-theme="dark"] .mobile-logo-image {
    filter: brightness(0) invert(1) !important;
}

[data-theme="dark"] .footer-logo-image,
[data-theme="dark"] .footer-brand .footer-logo-image,
html[data-theme="dark"] .footer-logo-image {
    filter: brightness(0) invert(1) !important;
}