/* Simple & Robust Waterfall Layout Styles - Based on vue-waterfall principles */

.files-waterfall {
    position: relative;
    width: 100%;
    min-height: 400px;
    margin: 0;
    padding: 16px;
    box-sizing: border-box;
    /* CSS variable for waterfall item width - default to M size */
    --waterfall-item-width: 280px;
    /* Flexbox fallback for browsers without JS */
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-start;
}

/* When JS masonry is active */
.files-waterfall.js-masonry {
    display: block;
}

.waterfall-item {
    /* Fallback positioning */
    position: relative;
    border-radius: 8px;
    background: var(--bs-card-bg, var(--bs-body-bg, white));
    border: 1px solid var(--bs-border-color, rgba(0, 0, 0, 0.125));
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.3s ease, width 0.3s ease;
    cursor: pointer;
    overflow: hidden;
    box-sizing: border-box;
    /* Use CSS variable for width - fallback for flexbox layout */
    width: var(--waterfall-item-width, 280px);
    min-width: var(--waterfall-item-width, 280px);
    /* Default visibility */
    visibility: visible;
    opacity: 1;
    /* Add top margin to each item */
    margin-top: 16px;
}

/* JS positioned items - also use CSS variable */
.files-waterfall.js-masonry .waterfall-item {
    position: absolute;
    width: var(--waterfall-item-width, 280px);
    /* Let JS fully control spacing in masonry mode */
    margin: 0 !important;
    /* Allow item width to be smaller for XS/S without forcing min-width that causes overlap */
    min-width: 0 !important;
    /* Avoid animating width/opacity during layout */
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* Show items after layout is ready - simplified */
.files-waterfall.loading .waterfall-item { visibility: hidden !important; opacity: 0 !important; }
.files-waterfall:not(.loading) .waterfall-item { visibility: visible !important; opacity: 1 !important; }

/* Fade in effect for newly positioned items */
.waterfall-item.waterfall-positioned {
    animation: waterfallFadeIn 0.3s ease;
}

@keyframes waterfallFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.waterfall-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* Dark theme hover effects */
:root[data-theme="dark"] .waterfall-item:hover,
:root[data-bs-theme="dark"] .waterfall-item:hover,
.theme-dark .waterfall-item:hover,
[data-bs-theme="dark"] .waterfall-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.waterfall-item.selected {
    border: 2px solid var(--bs-primary, #007bff);
    box-shadow: 0 4px 16px rgba(var(--bs-primary-rgb, 0, 123, 255), 0.3);
}

/* Dark theme selection effects */
:root[data-theme="dark"] .waterfall-item.selected,
:root[data-bs-theme="dark"] .waterfall-item.selected,
.theme-dark .waterfall-item.selected,
[data-bs-theme="dark"] .waterfall-item.selected {
    box-shadow: 0 4px 16px rgba(var(--bs-primary-rgb, 77, 171, 247), 0.4);
}

.waterfall-item.focused {
    outline: 2px solid var(--bs-primary, #007bff);
    outline-offset: 2px;
}

/* Image containers - preserve aspect ratios */
.waterfall-image {
    position: relative;
    width: 100%;
    background: var(--bs-secondary-bg, #fcfcfd);
    box-sizing: border-box;
    max-height: 100%;
    height: 100%; /* Fill the item rect height assigned by JS */
    overflow: hidden;
}

.waterfall-img {
    width: 100%;
    height: 100%; /* Fill container height to avoid bottom gap */
    display: block;
    border-radius: 8px 8px 0 0;
    /* This preserves the natural aspect ratio */
    object-fit: cover; /* cover ensures no gap; cropping may occur */
    max-width: 100%;
    min-height: 0;
}

.waterfall-img-fallback {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bs-secondary-bg, #fcfcfd);
    border-radius: 8px 8px 0 0;
}

.waterfall-img-placeholder {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bs-secondary-bg, #fcfcfd);
    border-radius: 8px 8px 0 0;
}

/* Overlay for image info */
.waterfall-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
    padding: 16px 12px 12px;
    border-radius: 0 0 8px 8px;
}

.waterfall-file-name {
    font-weight: 600;
    font-size: 14px;
    line-height: 1.2;
    margin-bottom: 4px;
    word-break: break-word;
}

.waterfall-file-info {
    font-size: 12px;
    opacity: 0.9;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

/* Folder items in waterfall */
.waterfall-folder {
    padding: 20px;
    text-align: center;
    background: var(--bs-secondary-bg, #fcfcfd);
    border-radius: 8px;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: visible;
}

.folder-icon {
    margin-bottom: 12px;
}

.folder-name {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
    word-break: break-word;
    text-align: center;
    color: var(--bs-body-color, #212529);
}

.folder-info {
    font-size: 12px;
    color: var(--bs-secondary-color, #6c757d);
    text-align: center;
}

/* Non-image files in waterfall */
.waterfall-file {
    padding: 16px;
    background: var(--bs-secondary-bg, #fcfcfd);
    border-radius: 8px;
    min-height: 100px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.file-icon-container {
    flex-shrink: 0;
    width: 48px;
    text-align: center;
}

.file-details {
    flex: 1;
    min-width: 0;
}

.file-details .file-name {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
    word-break: break-word;
    color: var(--bs-body-color, #212529);
}

.file-meta {
    font-size: 12px;
    color: var(--bs-secondary-color, #6c757d);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Selection indicator */
.waterfall-selection {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 24px;
    height: 24px;
    background: var(--bs-primary, #007bff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Loading state styles */
.waterfall-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    background: var(--bs-body-bg, rgba(255, 255, 255, 0.9));
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Display the loading overlay while hiding items */
.files-waterfall.loading .waterfall-loading {
    display: block !important;
}

.files-waterfall.loading .waterfall-item {
    visibility: hidden;
    opacity: 0;
}

/* Note: Dark mode support is now handled via CSS custom properties */

/* Theme support for waterfall items - Support both data-theme and data-bs-theme */
:root[data-theme="dark"] .waterfall-item,
:root[data-bs-theme="dark"] .waterfall-item,
.theme-dark .waterfall-item,
[data-bs-theme="dark"] .waterfall-item {
    background: var(--bs-secondary-bg, #343a40);
    border-color: var(--bs-border-color, #495057);
    color: var(--bs-body-color, #adb5bd);
}

:root[data-theme="dark"] .waterfall-folder,
:root[data-bs-theme="dark"] .waterfall-folder,
.theme-dark .waterfall-folder,
[data-bs-theme="dark"] .waterfall-folder {
    background: var(--bs-secondary-bg, #343a40);
    color: var(--bs-body-color, #adb5bd);
}

:root[data-theme="dark"] .waterfall-file-folder,
:root[data-bs-theme="dark"] .waterfall-file-folder,
.theme-dark .waterfall-file-folder,
[data-bs-theme="dark"] .waterfall-file-folder {
    background: var(--bs-secondary-bg, #343a40);
    color: var(--bs-body-color, #adb5bd);
}

:root[data-theme="dark"] .waterfall-file,
:root[data-bs-theme="dark"] .waterfall-file,
.theme-dark .waterfall-file,
[data-bs-theme="dark"] .waterfall-file {
    background: var(--bs-secondary-bg, #343a40);
    color: var(--bs-body-color, #adb5bd);
}

:root[data-theme="dark"] .folder-name,
:root[data-bs-theme="dark"] .folder-name,
.theme-dark .folder-name,
[data-bs-theme="dark"] .folder-name {
    color: var(--bs-body-color, #adb5bd);
}

:root[data-theme="dark"] .file-folder-name,
:root[data-bs-theme="dark"] .file-folder-name,
.theme-dark .file-folder-name,
[data-bs-theme="dark"] .file-folder-name {
    color: var(--bs-body-color, #adb5bd);
}

:root[data-theme="dark"] .waterfall-loading,
:root[data-bs-theme="dark"] .waterfall-loading,
.theme-dark .waterfall-loading,
[data-bs-theme="dark"] .waterfall-loading {
    background: var(--bs-body-bg, rgba(33, 37, 41, 0.9));
    color: var(--bs-body-color, #adb5bd);
}

/* Dark theme secondary colors */
:root[data-theme="dark"] .folder-info,
:root[data-bs-theme="dark"] .folder-info,
.theme-dark .folder-info,
[data-bs-theme="dark"] .folder-info {
    color: var(--bs-secondary-color, #adb5bd);
}

:root[data-theme="dark"] .file-meta,
:root[data-bs-theme="dark"] .file-meta,
.theme-dark .file-meta,
[data-bs-theme="dark"] .file-meta {
    color: var(--bs-secondary-color, #adb5bd);
}

:root[data-theme="dark"] .file-folder-info,
:root[data-bs-theme="dark"] .file-folder-info,
.theme-dark .file-folder-info,
[data-bs-theme="dark"] .file-folder-info {
    color: var(--bs-secondary-color, #adb5bd);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .files-waterfall {
        padding: 12px;
    }
    
    .waterfall-item {
        /* More flexible fallback on mobile */
        width: calc(50% - 8px);
        min-width: 150px;
    }
    
    .waterfall-overlay {
        padding: 12px 8px 8px;
    }
    
    .waterfall-file-name {
        font-size: 13px;
    }
    
    .waterfall-file-info {
        font-size: 11px;
    }
    
    .waterfall-folder {
        padding: 16px;
        min-height: 120px;
    }
    
    .waterfall-file-folder {
        padding: 16px;
        min-height: 120px;
    }
    
    .waterfall-file {
        padding: 12px;
        min-height: 80px;
    }
}

@media (max-width: 480px) {
    .waterfall-item {
        width: 100%;
        min-width: auto;
    }
    
    .files-waterfall {
        padding: 8px;
        gap: 8px;
    }
}

/* Loading indicator styles */
.waterfall-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    color: var(--bs-secondary-color, #6c757d);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bs-border-color, #dee2e6);
    border-top: 3px solid var(--bs-primary, #0d6efd);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 12px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.waterfall-loading p {
    margin: 0;
    font-size: 14px;
    font-weight: 500;
}

/* Progressive loading animations */
.waterfall-item.loading {
    opacity: 0.5;
}

.waterfall-item.loaded {
    opacity: 1;
}

/* Animation for initial load */
@keyframes waterfallFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive column adjustments for better progressive loading */
@media (min-width: 1200px) {
    .files-waterfall {
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .files-waterfall {
        padding: 12px;
        gap: 12px;
    }
}

.waterfall-item {
    animation: waterfallFadeIn 0.3s ease-out;
}

/* File items displayed as folder-like in waterfall (for non-preview files) */
.waterfall-file-folder {
    padding: 20px;
    text-align: center;
    background: var(--bs-secondary-bg, #fcfcfd);
    border-radius: 8px;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* Auto-expand height based on content */
    height: auto;
}

.file-folder-icon {
    margin-bottom: 12px;
    flex-shrink: 0;
}

.file-folder-name {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
    word-break: break-word;
    text-align: center;
    /* Allow text to wrap and expand height */
    white-space: normal;
    overflow-wrap: break-word;
    hyphens: auto;
    line-height: 1.4;
    color: var(--bs-body-color, #212529);
}

.file-folder-info {
    font-size: 12px;
    color: var(--bs-secondary-color, #6c757d);
    text-align: center;
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Dark theme loading indicator */
:root[data-theme="dark"] .waterfall-loading,
:root[data-bs-theme="dark"] .waterfall-loading,
.theme-dark .waterfall-loading,
[data-bs-theme="dark"] .waterfall-loading {
    color: var(--bs-secondary-color, #adb5bd);
}