/* Image Gallery Styles */

/* Content Container - Split layout for messages and gallery */
.content-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* Message Viewer - Takes 70% height */
.content-container .message-viewer {
    flex: 1 1 70%;
    min-height: 300px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Gallery Resize Handle */
.gallery-resize-handle {
    height: 6px;
    background-color: var(--divider);
    cursor: ns-resize;
    position: relative;
    flex-shrink: 0;
    transition: background-color 0.2s;
}

.gallery-resize-handle:hover,
.gallery-resize-handle.active {
    background-color: var(--primary-color);
}

.gallery-resize-handle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 2px;
    background-color: var(--on-surface-variant);
    border-radius: 1px;
}

/* Image Gallery - Takes 30% height */
.image-gallery {
    flex: 0 0 30%;
    min-height: 200px;
    max-height: 50%;
    background-color: var(--surface);
    border-top: 1px solid var(--divider);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Gallery Header */
.gallery-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--surface);
    border-bottom: 1px solid var(--divider);
    flex-shrink: 0;
}

.gallery-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.gallery-title .material-icons {
    font-size: 20px;
    color: var(--on-surface-variant);
}

.gallery-title h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--on-surface);
}

.gallery-count {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
}

.gallery-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* Gallery Container */
.gallery-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    overflow-y: auto;
    height: 100%;
}

/* Thumbnail Item */
.gallery-item {
    position: relative;
    aspect-ratio: 1;
    background-color: var(--surface-variant);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Loading state for images */
.gallery-item.loading {
    background: linear-gradient(
        90deg,
        var(--surface-variant) 0%,
        var(--divider) 50%,
        var(--surface-variant) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* Gallery Loading */
.gallery-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
}

.gallery-loading .spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--spacing-sm);
}

/* Gallery Empty State */
.gallery-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--on-surface-variant);
    text-align: center;
    padding: var(--spacing-lg);
}

.gallery-empty .material-icons {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

.gallery-empty p {
    margin: 0;
    font-size: 0.875rem;
}

/* Compact Grid Mode */
.gallery-grid.compact {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--spacing-xs);
}

/* Large Grid Mode */
.gallery-grid.large {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

/* Image Info Overlay */
.gallery-item-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 100%);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.gallery-item:hover .gallery-item-info {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .image-gallery {
        flex: 0 0 40%; /* Larger on mobile */
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: var(--spacing-xs);
        padding: var(--spacing-sm);
    }
    
    .gallery-resize-handle {
        display: none; /* No resize on mobile */
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
}

/* Dark mode adjustments */
[data-theme="dark"] .image-gallery {
    background-color: var(--surface);
}

[data-theme="dark"] .gallery-item {
    background-color: var(--surface-variant);
}

[data-theme="dark"] .gallery-item-info {
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, transparent 100%);
}