:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --header-bg: #f0f4f8;
            --safety-green: #4caf50;
            --warning-orange: #ff9800;
        }
         
        .page-header {
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.2) 0%, rgba(56, 142, 60, 0.2) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(76, 175, 80, 0.2);
            position: relative;
            overflow: hidden;color:var(--primary-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);
        }
       
        /* Input Group */
        .input-group-text {
            background-color: var(--light-gray);
            border: 1px solid #ddd;
        }
        
        /* Result Area */
        .result-container {
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 1.5rem;
            margin-top: 1.5rem;
            position: relative;
            border: 1px solid var(--border-color);
        }
        
        .result-title {
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--safety-green);
        }
        
        .result-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
        }
        
        .result-card {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            text-align: center;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            border: 1px solid var(--border-color);
        }
        
        .result-value {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--safety-green);
            margin: 0.5rem 0;
        }
        
        .result-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .safety-badge {
            display: inline-block;
            background-color: var(--safety-green);
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-top: 0.5rem;
        }
        
        .warning-badge {
            display: inline-block;
            background-color: var(--warning-orange);
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-top: 0.5rem;
        }
        
        /* Wire Size Table */
        .wire-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.9rem;
        }
        
        .wire-table th, .wire-table td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        
        .wire-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        .wire-table tr:hover {
            background-color: rgba(76, 175, 80, 0.05);
        }
        
        .wire-table .highlight {
            background-color: rgba(76, 175, 80, 0.1);
            font-weight: 600;
        }
        
        /* Content Sections */
        .section-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--safety-green);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .info-box {
            background-color: rgba(76, 175, 80, 0.05);
            border-left: 3px solid var(--safety-green);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        
        .warning-box {
            background-color: rgba(255, 152, 0, 0.05);
            border-left: 3px solid var(--warning-orange);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        
        .benefit-item {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }
        
        .benefit-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(76, 175, 80, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            color: var(--safety-green);
            flex-shrink: 0;
        }
      
        /* Responsive Adjustments */
        @media (max-width: 991px) {
            .tool-container {
                flex-direction: column;
            }
            
            .tool-sidebar {
                width: 100%;
            }
            
            .result-grid {
                grid-template-columns: 1fr;
            }
        }
       
        /* Range Slider Customization */
        .form-range {
            width: 100%;
        }
        
        .form-range::-webkit-slider-thumb {
            background-color: var(--safety-green);
        }
        
        .form-range::-moz-range-thumb {
            background-color: var(--safety-green);
        }
        
        .range-value {
            display: inline-block;
            min-width: 40px;
            text-align: right;
        }
        
        /* Toggle Switch */
        .form-check-input:checked {
            background-color: var(--safety-green);
            border-color: var(--safety-green);
        }
        
        /* Tooltip */
        .tooltip-icon {
            color: var(--text-muted);
            margin-left: 0.5rem;
            cursor: help;
        }
        
        /* NEC Code Reference */
        .code-reference {
            background-color: #f5f5f5;
            border-left: 4px solid #8d6e63;
            padding: 1rem;
            margin: 1.5rem 0;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
        }
        
        /* FAQ Section */
        .faq-section {
            margin-top: 2rem;
        }
        
        .faq-item {
            margin-bottom: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
        }
        
        .faq-question {
            background-color: var(--light-gray);
            padding: 1rem 1.5rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background-color 0.3s;
        }
        
        .faq-question:hover {
            background-color: #e9ecef;
        }
        
        .faq-answer {
            padding: 1.5rem;
            background-color: white;
            border-top: 1px solid var(--border-color);
        }
        
        .faq-icon {
            transition: transform 0.3s;
        }
        
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        /* Validation styles */
        .is-invalid {
            border-color: #dc3545;
            box-shadow: 0 0 0 0.25rem rgba(220, 53, 69, 0.25);
        }

        .invalid-feedback {
            display: none;
            width: 100%;
            margin-top: 0.25rem;
            font-size: 0.875em;
            color: #dc3545;
        }

        .is-invalid ~ .invalid-feedback {
            display: block;
        }
        
        /* Warning styles */
        .warning-message {
            display: none;
            background-color: rgba(255, 152, 0, 0.1);
            border: 1px solid var(--warning-orange);
            border-radius: 6px;
            padding: 1rem;
            margin-top: 1rem;
        }
        
        .warning-message.show {
            display: block;
        }
        
        /* Loading indicator */
        .loading-indicator {
            display: none;
            text-align: center;
            padding: 1rem;
        }
        
        .loading-indicator.show {
            display: block;
        }
        
        .spinner {
            border: 4px solid rgba(76, 175, 80, 0.3);
            border-radius: 50%;
            border-top: 4px solid var(--safety-green);
            width: 30px;
            height: 30px;
            animation: spin 1s linear infinite;
            margin: 0 auto 1rem;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* Verification Results */
        .verification-results {
            background-color: rgba(44, 125, 160, 0.05);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            border-radius: 0 6px 6px 0;
            margin: 1.5rem 0;
        }
        
        .verification-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .verification-item {
            display: flex;
            align-items: center;
            margin-bottom: 0.75rem;
        }
        
        .verification-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: var(--safety-green);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            color: white;
            flex-shrink: 0;
            font-size: 0.75rem;
        }
        
        .verification-icon.warning {
            background-color: var(--warning-orange);
        }
        
        .verification-icon.error {
            background-color: #dc3545;
        }