/* ========================================
   素材库页面专用样式
   ======================================== */

/* 统计栏 */
.materials-stats {
    margin-bottom: var(--space-6);
}

.stats-row {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    min-width: 160px;
}

.stat-item svg {
    width: 24px;
    height: 24px;
    color: var(--primary-500);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* 素材网格 */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-4);
}

.material-card {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
}

.material-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.material-image {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--bg-secondary);
}

.material-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.material-card:hover .material-image img {
    transform: scale(1.05);
}

.material-info {
    padding: var(--space-3) var(--space-4);
}

.material-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: var(--space-1);
}

.material-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.material-actions {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    display: flex;
    gap: var(--space-1);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.material-card:hover .material-actions {
    opacity: 1;
}

.material-actions .btn-icon {
    width: 32px;
    height: 32px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border-radius: var(--radius-md);
}

.material-actions .btn-icon:hover {
    background: rgba(0, 0, 0, 0.7);
}

/* 图片预览弹窗 */
.image-preview-modal .modal-content {
    max-width: 90vw;
    max-height: 90vh;
    padding: 0;
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.preview-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border-radius: var(--radius-full);
    z-index: 10;
    transition: background var(--transition-fast);
}

.preview-close:hover {
    background: rgba(0, 0, 0, 0.7);
}

#previewImage {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
}

.preview-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
}

/* 空状态 */
.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    color: var(--text-tertiary);
    text-align: center;
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

/* 加载状态 */
.loading-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    color: var(--text-tertiary);
}

.loading-state svg {
    width: 32px;
    height: 32px;
    margin-bottom: var(--space-3);
}

/* 响应式 */
@media (max-width: 768px) {
    .materials-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }
    
    .material-actions {
        opacity: 1;
    }
    
    .stats-row {
        flex-direction: column;
    }
    
    .stat-item {
        width: 100%;
    }
}