/* ========== FILE UPLOAD COMPONENTS ========== */

/* Reference Upload Section */
.reference-upload-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.file-upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--gray-50);
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-upload-area:hover,
.file-upload-area.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-1px);
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.upload-placeholder i {
    font-size: 1.5rem;
    color: var(--gray-400);
}

.upload-placeholder p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
    font-weight: 500;
}

.upload-placeholder small {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    margin: 0;
}

/* Uploaded Files Preview */
.uploaded-files-preview {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    border: 1px solid var(--gray-200);
}

.uploaded-files-preview h4,
.uploaded-files-preview h5 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

/* Files Grid */
.files-grid,
.files-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-sm);
}

.file-item {
    background: var(--bg-primary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.file-item:hover {
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.file-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.file-icon.image {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.file-icon.document {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.file-icon.video {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.file-icon.archive {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: white;
}

.file-icon.other {
    background: var(--gray-500);
    color: white;
}

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

.file-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    display: flex;
    gap: var(--space-sm);
}

.file-actions {
    display: flex;
    gap: var(--space-xs);
    flex-shrink: 0;
}

.file-action {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.file-action.view {
    background: var(--primary);
    color: white;
}

.file-action.view:hover {
    background: var(--primary-dark);
}

.file-action.download {
    background: var(--success);
    color: white;
}

.file-action.download:hover {
    background: var(--success-dark);
}

.file-action.delete {
    background: var(--danger);
    color: white;
}

.file-action.delete:hover {
    background: var(--danger-dark);
}

/* Image Preview in File Item */
.file-preview {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
}

/* File Upload Progress */
.file-upload-progress {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-top: var(--space-sm);
}

.upload-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.upload-item:last-child {
    margin-bottom: 0;
}

.upload-item .file-icon {
    width: 32px;
    height: 32px;
    font-size: 1rem;
}

.upload-progress-bar {
    flex: 1;
    height: 6px;
    background: var(--gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.upload-progress-fill {
    height: 100%;
    background: var(--primary);
    transition: width 0.3s ease;
    width: 0%;
}

.upload-status {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.upload-status.success {
    color: var(--success);
}

.upload-status.error {
    color: var(--danger);
}

/* Existing Files Section */
.existing-files-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    border: 1px solid var(--gray-200);
}

/* File Modal/Viewer */
.file-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.file-modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    position: relative;
}

.file-modal-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: var(--space-sm);
}

.file-modal-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.file-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.file-modal-close:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

.file-modal-body {
    max-height: 70vh;
    overflow: auto;
    text-align: center;
}

.file-modal-image {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.file-modal-info {
    text-align: left;
    background: var(--gray-50);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-top: var(--space-md);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .files-grid,
    .files-list {
        grid-template-columns: 1fr;
    }
    
    .file-item {
        flex-direction: column;
        text-align: center;
        padding: var(--space-md);
    }
    
    .file-info {
        text-align: center;
    }
    
    .file-actions {
        justify-content: center;
        margin-top: var(--space-sm);
    }
    
    .file-modal-content {
        margin: var(--space-sm);
        padding: var(--space-md);
    }
    
    .upload-placeholder {
        padding: var(--space-md);
    }
    
    .reference-upload-section {
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .file-upload-area {
        padding: var(--space-md);
        min-height: 60px;
    }
    
    .upload-placeholder i {
        font-size: 1.2rem;
    }
    
    .upload-placeholder p {
        font-size: var(--font-size-xs);
    }
    
    .file-actions {
        flex-wrap: wrap;
    }
}

/* Animation for file items */
@keyframes slideInFile {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.file-item {
    animation: slideInFile 0.3s ease-out;
}