/* Animations and Transitions */

/* Fade in animation for modal */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-overlay {
    animation: fadeIn var(--transition-normal);
}

.modal-container {
    animation: slideIn var(--transition-slow);
}

/* File card hover animations */
@keyframes cardHover {
    from {
        transform: translateY(0);
        box-shadow: var(--shadow-sm);
    }
    to {
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }
}

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

/* Loading animations */
@keyframes pulse {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

.loading-placeholder {
    animation: pulse 2s ease-in-out infinite;
}

/* Thumbnail loading animation */
@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

.thumbnail-loading {
    background: linear-gradient(
        90deg,
        var(--bg-card) 0px,
        var(--color-glass-bg-hover) 40px,
        var(--color-glass-bg-hover) 80px,
        var(--bg-card) 120px
    );
    background-size: 200px 100%;
    animation: shimmer 2s ease-in-out infinite;
}

/* Ripple effect for buttons */
@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

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

.ripple::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: var(--radius-full);
    background: var(--color-accent-glow);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

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

/* Smooth scrolling */
.file-display-area {
    scroll-behavior: smooth;
}

/* Focus animations */
.focus-ring {
    position: relative;
}

.focus-ring:focus-visible::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 2px solid var(--color-accent-blue);
    border-radius: var(--radius-md);
    animation: focusRing var(--transition-slow);
}

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

/* Stagger animation for grid items */
.file-grid .file-card {
    animation: slideInUp var(--transition-slow) ease-out;
    animation-fill-mode: both;
}

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

/* Add delays for stagger effect */
.file-card:nth-child(1) { animation-delay: 0ms; }
.file-card:nth-child(2) { animation-delay: 50ms; }
.file-card:nth-child(3) { animation-delay: 100ms; }
.file-card:nth-child(4) { animation-delay: 150ms; }
.file-card:nth-child(5) { animation-delay: 200ms; }
.file-card:nth-child(6) { animation-delay: 250ms; }
.file-card:nth-child(n+7) { animation-delay: 300ms; }

/* Search input focus effect */
.search-input:focus-visible {
    animation: inputFocus var(--transition-normal) ease-out;
}

@keyframes inputFocus {
    from {
        box-shadow: 0 0 0 0 var(--color-accent-glow);
    }
    to {
        box-shadow: 0 0 0 3px var(--color-glass-border);
    }
}

/* Bounce effect for upload button */
.upload-btn:active {
    animation: bounce var(--transition-normal) ease-out;
}

@keyframes bounce {
    0%, 20%, 60%, 100% {
        transform: scale(1);
    }
    40% {
        transform: scale(0.95);
    }
    80% {
        transform: scale(1.05);
    }
}

/* Progress bar animation */
@keyframes progressBar {
    from {
        width: 0%;
    }
}

.video-progress-bar,
.audio-progress-bar {
    animation-timing-function: ease-out;
}

/* Zoom in/out animations for image viewer */
@keyframes zoomIn {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.5);
    }
}

@keyframes zoomOut {
    from {
        transform: scale(1.5);
    }
    to {
        transform: scale(1);
    }
}

.image-viewer.zooming-in {
    animation: zoomIn var(--transition-normal) ease-out forwards;
}

.image-viewer.zooming-out {
    animation: zoomOut var(--transition-normal) ease-out forwards;
}

/* Fade transition for view switching */
.view-transition {
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.view-transition.active {
    opacity: 1;
}

/* Selection animations */
@keyframes selectItem {
    from {
        background-color: transparent;
    }
    to {
        background: var(--color-glass-bg-hover);
    }
}

.file-card.selected,
.file-row.selected {
    animation: selectItem var(--transition-fast) ease-out;
}

/* Toast notification animations */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

.toast {
    animation: slideInRight var(--transition-normal) ease-out;
}

.toast.removing {
    animation: slideOutRight var(--transition-normal) ease-out;
}

/* Accordion-style expand/collapse */
@keyframes expandDown {
    from {
        max-height: 0;
        opacity: 0;
    }
    to {
        max-height: 200px;
        opacity: 1;
    }
}

@keyframes collapseUp {
    from {
        max-height: 200px;
        opacity: 1;
    }
    to {
        max-height: 0;
        opacity: 0;
    }
}

.collapsible-content.expanding {
    animation: expandDown var(--transition-normal) ease-out;
}

.collapsible-content.collapsing {
    animation: collapseUp var(--transition-normal) ease-out;
}

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

/* High contrast mode adjustments */
@media (prefers-contrast: high) {
    .file-card:hover {
        border-width: 2px;
    }
    
    .modal-container {
        border-width: 2px;
    }
    
    .focus-ring:focus-visible::after {
        border-width: 3px;
    }
}