:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --info-color: #17a2b8;
        }
         .result-container {
    background-color: white;
    border-radius: 6px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    border: 1px solid var(--border-color);
    display: none;
}
        .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden;  color: var(--text-color);
        } 
         
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        
        .breadcrumb-item.active {
            color: var(--text-color);
        }
       
        /* Upload Area */
        .upload-area {
            border: 2px dashed var(--border-color);
            border-radius: 8px;
            padding: 3rem 1rem;
            text-align: center;
            transition: all 0.3s;
            background-color: var(--light-gray);
            cursor: pointer;
            margin-bottom: 1.5rem;
        }
        
        .upload-area:hover, .upload-area.dragover {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .upload-area i {
            font-size: 3rem;
            color:#216481;
            margin-bottom: 1rem;
        }
        
        /* Image Preview */
        .image-preview-container {
            max-height: 400px;
            overflow-y: auto;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 1rem;
            background-color: var(--light-gray);
        }
        
        .image-item {
            display: flex;
            align-items: center;
            padding: 0.75rem;
            background-color: white;
            border-radius: 6px;
            border: 1px solid var(--border-color);
            margin-bottom: 0.75rem;
            transition: all 0.3s;
        }
        
        .image-item:hover {
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .image-preview {
            width: 60px;
            height: 60px;
            object-fit: contain;
            border-radius: 4px;
            border: 1px solid #ddd;
            margin-right: 1rem;
            background-color: white;
        }
        
        .image-info {
            flex-grow: 1;
        }
        
        .image-name {
            font-weight: 600;
            margin-bottom: 0.25rem;
            word-break: break-all;
        }
        
        .image-dimensions {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        
        .image-actions {
            display: flex;
            gap: 0.5rem;
        }
        
        /* Sprite Preview */
        .sprite-preview-container {
            position: relative;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            background-color: #f8f9fa;
            min-height: 200px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .sprite-preview {
            max-width: 100%;
            max-height: 300px;
            object-fit: contain;
            background-color: white;
            border: 1px solid #ddd;
        }
        
        .sprite-info {
            background-color: white;
            border-radius: 6px;
            padding: 1rem;
            margin-top: 1rem;
            border: 1px solid var(--border-color);
        }
        
        .info-item {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
        }
        
        .info-label {
            font-weight: 600;
            color: var(--text-muted);
        }
        
        .info-value {
            font-family: 'Courier New', monospace;
        }
        
        /* CSS Code Output */
        .code-container {
            background-color: #1e1e1e;
            border-radius: 6px;
            padding: 1rem;
            margin-top: 1.5rem;
            max-height: 300px;
            overflow-y: auto;
            font-family: 'Courier New', monospace;
        }
        
        .code-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0.75rem;
        }
        
        .code-title {
            color: var(--primary-color);
            font-weight: 600;
        }
        
        .code-actions {
            display: flex;
            gap: 0.5rem;
        }
        
        pre {
            color: #d4d4d4;
            margin: 0;
            font-size: 0.9rem;
            line-height: 1.5;
        }
        
        .token.property {
            color: #9cdcfe;
        }
        
        .token.selector {
            color: #d7ba7d;
        }
        
        .token.punctuation {
            color: #d4d4d4;
        }
        
        .token.value {
            color: #ce9178;
        }
        
        /* Options Panel */
        .options-panel {
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
        }
        
        .option-group {
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .option-group:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        
        .option-title {
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
        }
           
        /* Sprite layout visualization */
        .layout-visualization {
            display: flex;
            flex-wrap: wrap;
            gap: 2px;
            background-color: #f8f9fa;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 5px;
            margin: 10px 0;
        }
        
        .layout-cell {
            background-color: var(--primary-color);
            opacity: 0.7;
            border-radius: 2px;
        }
        
        /* Performance metrics */
        .performance-metrics {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
        }
        
        .metric-card {
            background-color: white;
            border-radius: 6px;
            padding: 1rem;
            border: 1px solid var(--border-color);
            text-align: center;
        }
        
        .metric-value {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.25rem;
        }
        
        .metric-label {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        
        .metric-improvement {
            font-size: 0.75rem;
            color: var(--success-color);
            margin-top: 0.25rem;
        }