/* Upload Section Styles */

.upload-area {
    margin-bottom: var(--spacing-xl);
}

.upload-drop-zone {
    border: 3px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    background-color: var(--bg-light);
    transition: all var(--transition-normal);
    cursor: pointer;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-drop-zone:hover {
    border-color: var(--primary-color);
    background-color: rgba(0, 123, 255, 0.05);
}

.upload-drop-zone.drag-over {
    border-color: var(--primary-color);
    background-color: rgba(0, 123, 255, 0.1);
    transform: scale(1.02);
}

.drop-zone-content h3 {
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.drop-zone-content p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

.upload-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-md);
    opacity: 0.6;
}

.upload-form {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.upload-form h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.upload-queue {
    margin-top: var(--spacing-xl);
}

.upload-item {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    animation: slideInUp 0.3s ease-out;
}

.upload-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.upload-info h4 {
    margin: 0;
    font-size: 1rem;
    color: var(--text-color);
}

.upload-info .file-size {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.upload-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

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

.upload-progress {
    margin-bottom: var(--spacing-md);
}

.progress-bar-container {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    height: 8px;
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
    border-radius: var(--radius-md);
    transition: width 0.3s ease-out;
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.upload-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    font-size: 0.875rem;
}

.detail-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.detail-label {
    font-weight: 500;
    color: var(--text-muted);
}

.detail-value {
    color: var(--text-color);
}

.upload-thumbnail {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.upload-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.retry-btn {
    background-color: var(--warning-color);
    color: var(--white);
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.retry-btn:hover {
    background-color: #e0a800;
    transform: translateY(-1px);
}

.cancel-btn {
    background-color: var(--danger-color);
    color: var(--white);
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cancel-btn:hover {
    background-color: #c82333;
    transform: translateY(-1px);
}

/* File Selection Loading */
.file-selection-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.95);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 10;
}

.file-selection-loading .spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.file-selection-loading p {
    margin: 0;
    color: var(--text-color);
    font-weight: 500;
}

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

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.uploading .upload-status {
    animation: pulse 2s infinite;
}

/* File Selection Styles */
.selected-files {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.selected-files h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.file-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.file-item img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

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

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

.file-size {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.remove-file {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1.2rem;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.remove-file:hover {
    background-color: rgba(220, 53, 69, 0.1);
    transform: scale(1.1);
}

/* Upload Queue Header */
.upload-queue-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.upload-queue-header h3 {
    margin: 0;
    color: var(--text-color);
}

.queue-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.clear-completed {
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.clear-completed:hover {
    background-color: #5a6268;
    transform: translateY(-1px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .upload-drop-zone {
        padding: var(--spacing-lg);
        min-height: 150px;
    }
    
    .drop-zone-content h3 {
        font-size: 1.25rem;
    }
    
    .upload-icon {
        font-size: 2rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .upload-details {
        grid-template-columns: 1fr;
    }
    
    .file-list {
        grid-template-columns: 1fr;
    }
    
    .upload-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}