.tool-container {
            /*background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);*/
			/*background: #f8f8f2;*/
            min-height: 100vh;
            padding: 2rem 0;
        }
        
        .tool-card {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .tool-header {
			background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border-radius: 20px 20px 0 0;
            padding: 2rem;
            text-align: center;
        }
        
        .tool-header h1 {
            margin: 0;
            font-size: 2.5rem;
            font-weight: 700;
        }
        
        .tool-header p {
            margin: 0.5rem 0 0 0;
            opacity: 0.9;
        }
        
        .input-section {
            background: #f1f2f9;
            border-radius: 15px;
            padding: 2rem;
            margin: 2rem 0;
        }
        
        .form-label {
            font-weight: 600;
            color: #333;
            margin-bottom: 0.5rem;
        }
        
        .form-control, .form-select {
            border-radius: 10px;
            border: 2px solid #e0e0e0;
            padding: 0.75rem 1rem;
            transition: all 0.3s ease;
        }
        
        .form-control:focus, .form-select:focus {
            border-color: #4CAF50;
            box-shadow: 0 0 0 0.2rem rgba(76, 175, 80, 0.25);
        }
        
        .btn-analyze {
            background: linear-gradient(45deg, #545353, #303030);
            border: none;
            border-radius: 50px;
            padding: 1rem 2rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: all 0.3s ease;
        }
        
        .btn-analyze:hover {
            background: linear-gradient(45deg, #303030, #545353);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(48, 48, 48, 0.3);
        }
        
        .loading-spinner {
            display: none;
        }
        
        .loading-overlay {
            background: rgba(255, 255, 255, 0.9);
            border-radius: 15px;
            padding: 3rem;
            text-align: center;
        }
        
        .spinner-border {
            width: 3rem;
            height: 3rem;
        }
        
        .results-section {
            display: none;
            margin-top: 2rem;
        }
        
        .stats-card {
            background: white;
            border-radius: 15px;
            padding: 1.5rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border-left: 4px solid;
            margin-bottom: 1rem;
            transition: all 0.3s ease;
        }
        
        .stats-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        
        .stats-card.primary { border-left-color: #007bff; }
        .stats-card.success { border-left-color: #28a745; }
        .stats-card.info { border-left-color: #17a2b8; }
        .stats-card.warning { border-left-color: #ffc107; }
        
        .stat-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }
        
        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            margin: 0;
        }
        
        .stat-label {
            color: #6c757d;
            font-size: 0.9rem;
            margin: 0;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .keyword-table {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        
        .table-header {
            background: linear-gradient(45deg, #6c5ce7, #74b9ff);
            color: white;
            padding: 1.5rem;
        }
        
        .density-bar {
            height: 8px;
            border-radius: 4px;
            background: #e9ecef;
            overflow: hidden;
            margin-top: 0.5rem;
        }
        
        .density-fill {
            height: 100%;
            border-radius: 4px;
            transition: width 0.8s ease;
        }
        
        .density-high { background: #dc3545; }
        .density-medium { background: #ffc107; }
        .density-low { background: #28a745; }
        .density-optimal { background: #17a2b8; }
        
        .keyword-badge {
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
        }
        
        .badge-high { background: #ffe6e6; color: #dc3545; }
        .badge-medium { background: #fff8e1; color: #f57c00; }
        .badge-low { background: #e8f5e8; color: #28a745; }
        .badge-optimal { background: #e6f7ff; color: #17a2b8; }
        
        .error-message {
            background: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
            border-radius: 10px;
            padding: 1rem;
            margin: 1rem 0;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .fade-in-up {
            animation: fadeInUp 0.6s ease;
        }
        
        .progress-steps {
            display: flex;
            justify-content: space-between;
            margin: 1rem 0;
        }
        
        .step {
            flex: 1;
            text-align: center;
            padding: 0.5rem;
            border-radius: 10px;
            margin: 0 0.25rem;
            background: #f8f9fa;
            transition: all 0.3s ease;
        }
        
        .step.active {
            background: #4CAF50;
            color: white;
        }
        
        .step.completed {
            background: #28a745;
            color: white;
        }