/* LAYOUT STABILITY */
        .calculator-frame,
        .tool-frame,
        .matrix-workspace {
            min-height: 600px;
            contain: layout style;
            display: flex;
            flex-direction: column;
        }
        
        /* ACCESSIBILITY */
        button:focus-visible {
            outline: 3px solid var(--text-info);
            outline-offset: 2px;
        }
        
        /* SEO CONTENT SECTION BASE */
        .seo-content-section {
            max-width: 1000px;
            margin: 40px auto;
            padding: 0 20px;
            width: 100%;
            box-sizing: border-box;
            overflow-x: hidden;
        }
        
        .seo-content-section h1 {
            font-size: clamp(1.5rem, 5vw, 2.2rem);
            margin-bottom: 1rem;
            color: var(--text-primary);
            text-align: center;
            word-wrap: break-word;
            overflow-wrap: break-word;
        }
        
        .seo-content-section .lead-text {
            font-size: clamp(1rem, 3vw, 1.15rem);
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            text-align: center;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
            word-wrap: break-word;
            overflow-wrap: break-word;
        }
        
        /* AI SUMMARY BOX (AEO) */
        .ai-summary-box {
            background: linear-gradient(135deg, var(--accent-primary) 0%, var(--text-info) 100%);
            color: var(--txt-func);
            padding: 24px;
            border-radius: 16px;
            margin-bottom: 32px;
            box-shadow: 0 10px 40px rgba(var(--ui-highlight-rgb), 0.3);
            width: 100%;
            box-sizing: border-box;
        }
        .ai-summary-box h2 {
            color: var(--txt-func);
            margin-top: 0;
            margin-bottom: 16px;
            font-size: clamp(1.2rem, 4vw, 1.5rem);
            word-wrap: break-word;
            text-shadow: 0 1px 2px var(--shadow-color);
        }
        .ai-summary-box ul {
            margin: 0;
            padding-left: 20px;
        }
        .ai-summary-box li {
            margin-bottom: 8px;
            line-height: 1.5;
            word-wrap: break-word;
            overflow-wrap: break-word;
            color: var(--txt-func);
            text-shadow: 0 1px 2px var(--shadow-color);
        }
        .ai-summary-box strong {
            color: var(--text-warning);
        }
        .ai-summary-title {
            color: var(--txt-func);
            margin-top: 0;
            margin-bottom: 16px;
            font-size: clamp(1.2rem, 4vw, 1.5rem);
            word-wrap: break-word;
            text-shadow: 0 1px 2px var(--shadow-color);
            font-weight: bold;
        }
        
        /* BREADCRUMB NAVIGATION */
        .breadcrumb-nav {
            background: var(--bg-secondary, #f8f9fa);
            border-bottom: 1px solid var(--border-color);
            padding: 12px 20px;
            font-size: 0.875rem;
        }
        .breadcrumb-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-item a {
            color: var(--text-secondary, #6c757d);
            text-decoration: none;
            transition: color 0.2s;
        }
        .breadcrumb-item a:hover {
            color: var(--ui-highlight, #0066cc);
        }
        .breadcrumb-item.active {
            color: var(--text-primary, #333);
            font-weight: 600;
        }
        .breadcrumb-separator {
            color: var(--text-secondary, #6c757d);
            opacity: 0.5;
        }
        
        /* AUTHOR CARD (EEAT) */
        .author-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-secondary, #f8f9fa);
            padding: 24px;
            border-radius: 12px;
            border-left: 4px solid var(--text-info);
            margin: 32px 0;
        }
        .author-card img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            object-fit: cover;
        }
        .author-card h3 {
            margin: 0 0 4px 0;
            color: var(--text-primary);
            font-size: 1.2rem;
        }
        .author-title {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 8px;
        }
        .author-bio {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.5;
            margin: 0;
        }
        .author-links {
            margin-top: 12px;
        }
        .author-links a {
            color: var(--ui-highlight, #0066cc);
            text-decoration: none;
            margin-right: 16px;
            font-size: 0.9rem;
        }
        .author-links a:hover {
            text-decoration: underline;
        }
        
        /* TRUST BADGES */
        .trust-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin: 24px 0;
            width: 100%;
        }
        .trust-badge-item {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 12px;
            background: var(--bg-secondary, #f8f9fa);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            white-space: nowrap;
        }
        
        /* FEATURE GRID */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin: 32px 0;
        }
        .feature-card {
            background: var(--bg-secondary, #f8f9fa);
            padding: 25px;
            border-radius: 16px;
            border: 1px solid var(--border-color, #e0e0e0);
            transition: transform 0.2s ease, border-color 0.2s;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            border-color: var(--ui-highlight, #0066cc);
        }
        .feature-card h3 {
            color: var(--text-primary);
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
        }
        .feature-card p {
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }
        
        /* COMPARISON TABLE */
                /* Table Responsiveness */
        .table-wrapper {
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            margin: 24px 0;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            background: var(--bg-primary);
        }

.comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            background: var(--bg-primary, #fff);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            display: block;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .comparison-table thead,
        .comparison-table tbody {
            display: table;
            width: 100%;
            min-width: 500px;
        }
        .comparison-table th {
            background: linear-gradient(135deg, var(--accent-primary) 0%, var(--text-info) 100%);
            color: var(--txt-func);
            padding: 16px;
            text-align: left;
            font-size: 0.9rem;
        }
        .comparison-table td {
            padding: 16px;
            border-bottom: 1px solid var(--border-color, #e0e0e0);
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .comparison-table tr:last-child td {
            border-bottom: none;
        }
        .comparison-table .check::before {
            content: '✓';
            color: var(--text-success);
            font-weight: bold;
        }
        
        /* FAQ ACCORDION */
        .faq-section {
            margin-top: 40px;
            border-top: 1px solid var(--border-color);
            padding-top: 30px;
            width: 100%;
        }
        .faq-header {
            color: var(--text-primary);
            margin-bottom: 24px;
            font-size: clamp(1.3rem, 4vw, 1.75rem);
            text-align: center;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 10px;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-primary);
            list-style: none;
            font-size: clamp(1rem, 3vw, 1.1rem);
            gap: 12px;
        }
        .faq-question::-webkit-details-marker {
            display: none;
        }
        .faq-icon {
            width: 10px;
            height: 10px;
            border-right: 2px solid var(--text-secondary);
            border-bottom: 2px solid var(--text-secondary);
            transform: rotate(45deg);
            transition: transform 0.2s;
            flex-shrink: 0;
        }
        details[open] .faq-icon {
            transform: rotate(225deg);
            border-color: var(--ui-highlight);
        }
        .faq-answer {
            color: var(--text-secondary);
            line-height: 1.7;
            padding-bottom: 20px;
            word-wrap: break-word;
            overflow-wrap: break-word;
        }
        .faq-answer p {
            margin: 0;
        }
        
        /* RELATED TOOLS */
        .related-tools {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            margin: 24px 0;
            width: 100%;
        }
        .tool-card {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px;
            background: var(--bg-secondary, #f8f9fa);
            border-radius: 10px;
            text-decoration: none;
            border: 1px solid var(--border-color, #e0e0e0);
            transition: transform 0.2s, border-color 0.2s;
            color: var(--text-primary);
            word-wrap: break-word;
            overflow-wrap: break-word;
        }
        .tool-card:hover {
            transform: translateY(-3px);
            border-color: var(--ui-highlight, #0066cc);
        }
        .tool-card .icon {
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .tool-card h4 {
            margin: 0 0 4px 0;
            font-size: 1rem;
        }
        .tool-card span {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        
        /* VERIFICATION METHODOLOGY */
        .verification-methodology {
            background: var(--bg-secondary, #f8f9fa);
            padding: 2rem;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            margin: 32px 0;
            border-left: 4px solid var(--text-success);
            width: 100%;
            box-sizing: border-box;
            word-wrap: break-word;
            overflow-wrap: break-word;
        }
        .verification-methodology h2 {
            color: var(--text-primary);
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: clamp(1.2rem, 4vw, 1.5rem);
        }
        .verification-methodology ul {
            padding-left: 1.5rem;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .verification-methodology li {
            margin-bottom: 8px;
            word-wrap: break-word;
            overflow-wrap: break-word;
        }
        
        /* LEGAL DISCLAIMER */
        .legal-disclaimer {
            background: var(--bg-secondary, #f8f9fa);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            margin: 40px auto;
            max-width: 900px;
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .legal-disclaimer strong {
            color: var(--text-primary);
            display: block;
            margin-bottom: 8px;
        }
        .legal-disclaimer p {
            margin: 0;
            font-size: 0.85rem;
            text-align: center;
        }
        .legal-links {
            margin-top: 12px;
        }
        .legal-links a {
            color: var(--ui-highlight, #0066cc);
            text-decoration: none;
            margin: 0 8px;
        }
        
        /* USE CASE SECTIONS */
        .use-case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 24px 0;
            width: 100%;
        }
        .use-case-card {
            background: var(--bg-secondary, #f8f9fa);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            word-wrap: break-word;
            overflow-wrap: break-word;
        }
        .use-case-card h4 {
            margin-top: 0;
            color: var(--text-primary);
            font-size: 1.1rem;
        }
        .use-case-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
            line-height: 1.6;
        }
        
        /* FOOTER */
        .footer {
            background: var(--bg-secondary, #f8f9fa);
            padding: 40px 20px;
            margin-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
        }
        .footer-col h4 {
            color: var(--text-primary);
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 8px;
        }
        .footer-col a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.9rem;
        }
        .footer-col a:hover {
            color: var(--ui-highlight);
        }
        .footer-bottom {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.85rem;
        }
        
        /* Heavy Calculation Loading Indicator */
        .calculation-loading {
            position: fixed;
            top: 20px;
            right: 20px;
            background: var(--ui-highlight);
            color: var(--txt-func);
            padding: 10px 16px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.8125rem;
            z-index: 4000;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 12px var(--shadow-color);
            opacity: 0;
            transform: translateY(-20px);
            transition: opacity 0.2s, transform 0.2s;
            pointer-events: none;
        }
        .calculation-loading.active { opacity: 1; transform: translateY(0); }
        .calculation-loading::before {
            content: '';
            width: 16px;
            height: 16px;
            border: 2px solid rgba(var(--text-primary-rgb), 0.15);
            border-top-color: var(--text-primary);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }
        @keyframes spin { to { transform: rotate(360deg); } }
        
        /* ========== MATRIX SPECIFIC STYLES ========== */
        .main-container {
            max-width: none;
            padding: 0;
            margin: 0;
            min-height: 100vh;
        }
        
        .matrix-workspace {
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            background: var(--bg-app);
            width: 100%;
            max-width: 100vw;
            overflow-x: hidden;
        }
        
        /* Prevent horizontal overflow on mobile */
        html, body {
            max-width: 100vw;
            overflow-x: hidden;
        }
        
        /* Top Bar */
        .matrix-top-bar {
            flex-shrink: 0;
            height: 54px;
            background: var(--chassis-bg);
            color: var(--txt-func);
            display: flex;
            align-items: center;
            padding: 0 16px;
            border-bottom: 1px solid rgba(var(--text-primary-rgb), 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
            width: 100%;
            box-sizing: border-box;
        }
        
        .matrix-back-btn {
            background: none;
            border: none;
            color: var(--lbl-primary);
            font-size: 0.9375rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all var(--transition-fast);
        }
        
        .matrix-back-btn:hover {
            background: rgba(var(--text-primary-rgb), 0.1);
        }
        
        .matrix-title {
            font-weight: 700;
            color: var(--txt-func);
            font-size: 1rem;
            margin-left: 12px;
        }
        
        /* Main Content */
        .matrix-main-content {
            flex: 1;
            display: flex;
            gap: 16px;
            padding: 16px;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
            box-sizing: border-box;
        }
        
        /* Matrix Selector Sidebar */
        .matrix-selector-panel {
            width: 220px;
            background: var(--bg-secondary);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            padding: 16px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            overflow-y: auto;
        }
        
        .matrix-selector-title {
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        
        .matrix-selector-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 8px;
        }
        
        .matrix-selector-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
        }
        
        .matrix-selector-btn {
            width: 60px;
            height: 50px;
            border-radius: 8px;
            border: 2px solid var(--border-color);
            background: var(--bg-tertiary);
            color: var(--text-secondary);
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: center;
            touch-action: manipulation;
            -webkit-tap-highlight-color: transparent;
        }
        
        .matrix-selector-btn:hover {
            border-color: var(--ui-highlight);
            background: var(--bg-tertiary);
        }
        
        .matrix-selector-btn.active {
            background: var(--ui-highlight);
            color: var(--txt-func);
            border-color: var(--ui-highlight);
            box-shadow: 0 2px 8px rgba(var(--ui-highlight-rgb), 0.3);
        }
        
        .matrix-dim-display {
            font-size: 0.625rem;
            color: var(--text-secondary);
            font-family: monospace;
        }
        
        /* Editor Panel - FLEXIBLE CONTAINER */
        .matrix-editor-panel {
            flex: 1;
            background: var(--bg-secondary);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            min-width: 0;
            max-width: 100%;
        }
        
        .matrix-editor-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px;
            border-bottom: 1px solid var(--border-color);
            background: var(--bg-tertiary);
            flex-shrink: 0;
        }
        
        .matrix-editor-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            font-family: monospace;
        }
        
        .matrix-editor-controls {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        
        .matrix-dim-input {
            width: 60px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border-color);
            background: var(--bg-primary);
            color: var(--text-primary);
            text-align: center;
            font-family: monospace;
            font-weight: 600;
        }
        
        @media (max-width: 768px) {
            .matrix-dim-input,
            .matrix-row-ops-input {
                font-size: 1rem;
            }
        }
        
        .matrix-dim-input:focus {
            outline: var(--focus-ring);
            border-color: var(--ui-highlight);
        }
        
        /* MathPrint Matrix Display */
        .matrix-display-container {
            flex: 1;
            overflow: auto;
            padding: 20px;
            display: flex;
            justify-content: center;
            align-items: flex-start;
            background: var(--screen-bg);
            max-width: 100%;
            -webkit-overflow-scrolling: touch;
        }
        
        .matrix-display-container::-webkit-scrollbar {
            height: 8px;
            width: 8px;
        }
        
        .matrix-display-container::-webkit-scrollbar-track {
            background: var(--bg-secondary);
            border-radius: 4px;
        }
        
        .matrix-display-container::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        
        .matrix-display-container::-webkit-scrollbar-thumb:hover {
            background: var(--ui-highlight);
        }
        
        .math-matrix {
            display: inline-flex;
            flex-direction: column;
            border-left: 2px solid var(--text-primary);
            border-right: 2px solid var(--text-primary);
            margin: 10px;
            font-family: 'Courier New', monospace;
            font-size: 0.875rem;
            border-radius: 4px;
            min-height: 100px;
        }
        
        .math-matrix-row {
            display: flex;
            border-bottom: 1px solid var(--border-color);
        }
        
        .math-matrix-row:last-child {
            border-bottom: none;
        }
        
        .math-matrix-cell {
            padding: 8px 12px;
            text-align: center;
            min-width: 60px;
            border-right: 1px solid var(--border-color);
            background: var(--bg-primary);
            color: var(--text-primary);
            outline: none;
        }
        
        .math-matrix-cell:last-child {
            border-right: none;
        }
        
        .math-matrix-cell:focus {
            background: rgba(var(--ui-highlight-rgb), 0.1);
            box-shadow: inset 0 0 0 2px var(--ui-highlight);
        }
        
        /* Operations Panel */
        .matrix-ops-panel {
            width: 320px;
            background: var(--bg-secondary);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            padding: 16px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            overflow-y: auto;
        }
        
        .matrix-ops-section {
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 12px;
            margin-bottom: 12px;
        }
        
        .matrix-ops-section:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }
        
        .matrix-ops-title {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        
        .matrix-ops-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 6px;
        }
        
        .matrix-op-btn {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            padding: 10px;
            border-radius: 6px;
            color: var(--text-primary);
            font-size: 0.75rem;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
            touch-action: manipulation;
            -webkit-tap-highlight-color: transparent;
        }
        
        .matrix-op-btn:hover {
            background: var(--ui-highlight);
            color: var(--txt-func);
            border-color: var(--ui-highlight);
            transform: translateY(-1px);
        }
        
        .matrix-op-btn:active {
            transform: translateY(1px);
        }
        
        .matrix-op-btn.danger {
            color: var(--ui-error);
            border-color: var(--ui-error);
        }
        
        .matrix-op-btn.danger:hover {
            background: var(--ui-error);
            color: var(--txt-func);
        }
        
        /* Row Operations Panel */
        .matrix-row-ops {
            background: var(--bg-tertiary);
            border-radius: 8px;
            padding: 12px;
            border: 1px solid var(--border-color);
        }
        
        .matrix-row-ops-title {
            font-size: 0.6875rem;
            font-weight: 700;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }
        
        .matrix-row-ops-group {
            display: flex;
            gap: 6px;
            margin-bottom: 8px;
            align-items: center;
        }
        
        .matrix-row-ops-group:last-child {
            margin-bottom: 0;
        }
        
        .matrix-row-ops-input {
            width: 40px;
            padding: 6px;
            border-radius: 4px;
            border: 1px solid var(--border-color);
            background: var(--bg-primary);
            color: var(--text-primary);
            font-size: 0.6875rem;
        }
        
        .matrix-row-ops-small-btn {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            padding: 4px 8px;
            border-radius: 4px;
            color: var(--text-primary);
            font-size: 0.625rem;
            cursor: pointer;
        }
        
        .matrix-row-ops-small-btn:hover {
            background: var(--ui-highlight);
            color: var(--txt-func);
        }
        
        /* Console / Results */
        .matrix-console {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 12px;
            font-family: 'Courier New', monospace;
            font-size: 0.75rem;
            min-height: 120px;
            max-height: 200px;
            overflow-y: auto;
            color: var(--text-primary);
        }
        
        .matrix-console-entry {
            margin-bottom: 8px;
            padding-bottom: 4px;
            border-bottom: 1px dashed var(--border-color);
        }
        
        .matrix-console-entry:last-child {
            border-bottom: none;
        }
        
        .matrix-console-title {
            font-weight: 700;
            color: var(--ui-highlight);
        }
        
        .matrix-console-error {
            color: var(--ui-error);
            font-weight: 600;
        }
        
        /* Mobile Responsiveness */
        @media (max-width: 1024px) {
            .matrix-workspace {
                min-height: auto;
            }
            
            .matrix-main-content {
                flex-direction: column;
                gap: 12px;
                padding: 12px;
                max-width: 100vw;
                overflow-x: hidden;
            }
            
            .matrix-selector-panel {
                width: 100%;
                max-height: none;
                flex-direction: row;
                flex-wrap: wrap;
                padding: 12px;
            }
            
            .matrix-selector-title {
                width: 100%;
                margin-bottom: 8px;
            }
            
            .matrix-selector-grid {
                grid-template-columns: repeat(5, 1fr);
                flex: 1;
            }
            
            .matrix-editor-panel {
                width: 100%;
                min-height: 300px;
            }
            
            .matrix-display-container {
                padding: 12px;
                min-height: 200px;
            }
            
            .math-matrix {
                font-size: 0.75rem;
                margin: 5px;
            }
            
            .math-matrix-cell {
                padding: 6px 8px;
                min-width: 45px;
            }
            
            .matrix-ops-panel {
                width: 100%;
                max-height: none;
                padding: 12px;
            }
            
            .matrix-editor-header {
                flex-direction: column;
                gap: 12px;
                align-items: flex-start;
            }
            
            .matrix-editor-controls {
                width: 100%;
                justify-content: space-between;
            }
            
            .breadcrumb-list {
                overflow-x: auto;
                white-space: nowrap;
            }
            
            .author-card {
                flex-direction: column;
                text-align: center;
            }
            
            .ai-summary-box {
                padding: 16px;
            }
            
            .calculation-loading {
                top: 10px;
                right: 10px;
                padding: 8px 12px;
                font-size: 0.75rem;
            }
        }
        
        @media (max-width: 600px) {
            .matrix-workspace {
                width: 100vw;
                overflow-x: hidden;
            }
            
            .matrix-selector-grid {
                grid-template-columns: repeat(5, 1fr);
                gap: 6px;
            }
            
            .matrix-selector-btn {
                width: 100%;
                height: 44px;
                font-size: 0.875rem;
            }
            
            .matrix-dim-display {
                font-size: 0.5625rem;
            }
            
            .matrix-op-btn {
                font-size: 0.6875rem;
                padding: 10px 6px;
            }
            
            .matrix-top-bar {
                padding: 0 12px;
                height: 50px;
            }
            
            .matrix-title {
                font-size: 0.875rem;
            }
            
            .matrix-back-btn {
                font-size: 0.8125rem;
                padding: 6px 8px;
            }
            
            .matrix-back-btn svg {
                width: 20px;
                height: 20px;
            }
            
            .matrix-dim-input {
                width: 50px;
                padding: 6px;
            }
            
            .matrix-row-ops-group {
                flex-wrap: wrap;
                gap: 4px;
            }
            
            .matrix-row-ops-input {
                width: 35px;
                padding: 5px;
            }
            
            .matrix-row-ops-small-btn {
                padding: 6px 8px;
                font-size: 0.6875rem;
            }
            
            .matrix-console {
                min-height: 100px;
                font-size: 0.6875rem;
                padding: 10px;
            }
            
            .seo-content-section {
                padding: 0 12px;
                margin: 20px auto;
                width: 100%;
            }
            
            .seo-content-section h1 {
                font-size: 1.5rem;
                margin-bottom: 0.75rem;
            }
            
            .seo-content-section .lead-text {
                font-size: 1rem;
                margin-bottom: 1.5rem;
                padding: 0 8px;
            }
            
            .ai-summary-box {
                padding: 16px;
                margin-bottom: 20px;
            }
            
            .ai-summary-box h2 {
                font-size: 1.2rem;
            }
            
            .ai-summary-box ul {
                padding-left: 16px;
            }
            
            .ai-summary-box li {
                font-size: 0.9rem;
                margin-bottom: 6px;
            }
            
            .trust-badges {
                gap: 8px;
                margin: 16px 0;
            }
            
            .trust-badge-item {
                padding: 6px 10px;
                font-size: 0.75rem;
            }
            
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            
            .feature-card {
                padding: 20px;
            }
            
            .feature-card h3 {
                font-size: 1.1rem;
            }
            
            .feature-card p {
                font-size: 0.95rem;
                line-height: 1.6;
            }
            
                    /* Table Responsiveness */
        .table-wrapper {
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            margin: 24px 0;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            background: var(--bg-primary);
        }

.comparison-table {
                font-size: 0.875rem;
                display: block;
                overflow-x: auto;
            }
            
            .comparison-table thead,
            .comparison-table tbody {
                min-width: 400px;
            }
            
            .comparison-table th,
            .comparison-table td {
                padding: 10px 8px;
                font-size: 0.85rem;
            }
            
            .faq-section {
                margin-top: 24px;
                padding-top: 20px;
            }
            
            .faq-header {
                font-size: 1.3rem;
                margin-bottom: 16px;
            }
            
            .faq-question {
                padding: 12px 0;
                font-size: 0.95rem;
            }
            
            .faq-answer {
                font-size: 0.9rem;
                padding-bottom: 16px;
            }
            
            .related-tools {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            
            .tool-card {
                padding: 12px;
            }
            
            .tool-card h4 {
                font-size: 0.95rem;
            }
            
            .tool-card span {
                font-size: 0.8rem;
            }
            
            .use-case-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            
            .use-case-card {
                padding: 16px;
            }
            
            .verification-methodology {
                padding: 1.25rem;
                margin: 24px 0;
            }
            
            .verification-methodology h2 {
                font-size: 1.2rem;
            }
            
            .verification-methodology ul {
                padding-left: 1.25rem;
                font-size: 0.9rem;
            }
            
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            
            .footer-col h4 {
                font-size: 0.95rem;
            }
            
            .footer-col a {
                font-size: 0.85rem;
            }
        }
        
        @media (max-width: 380px) {
            .matrix-selector-grid {
                grid-template-columns: repeat(5, 1fr);
            }
            
            .matrix-selector-btn {
                height: 40px;
                font-size: 0.75rem;
            }
            
            .matrix-op-btn {
                font-size: 0.625rem;
                padding: 8px 4px;
            }
            
            .matrix-ops-grid {
                gap: 4px;
            }
            
            .seo-content-section h1 {
                font-size: 1.3rem !important;
            }
            
            .ai-summary-box h2 {
                font-size: 1.1rem !important;
            }
        }
        
        /* Force all SEO content to wrap on mobile */
        @media (max-width: 600px) {
            .seo-content-section article {
                width: 100%;
            }
            
            .seo-content-section article header h1[style],
            .seo-content-section .lead-text[style] {
                font-size: inherit !important;
            }
            
            .seo-content-section div[style*="padding: 2rem"] {
                padding: 1rem !important;
            }
            
            .seo-content-section h2 {
                font-size: 1.3rem !important;
                margin-top: 1.5rem !important;
            }
            
            .seo-content-section p {
                font-size: 0.95rem !important;
                line-height: 1.6 !important;
            }
        }
            /* ==========================================
           MOBILE RESPONSIVENESS (Max 768px)
           ========================================== */
        @media (max-width: 768px) {
            /* Main Workspace Constraints */
            .graphing-workspace, .workspace, .main-content { 
                width: 100%; 
                max-width: 100%; 
                margin: 0; 
                box-shadow: none; 
            }
            
            /* Content Area Constraints */
            #seo-content, .seo-content, .content-area { 
                padding: 30px 15px; 
                width: 100%;
                overflow: hidden;
            }
            
            #seo-content h1, .seo-content h1, .content-area h1 { 
                font-size: 1.75rem; 
                word-wrap: break-word; 
            }
            
            /* Force Grids to Single Column on Mobile */
            .feature-grid, 
            .use-case-section, 
            .related-tools,
            .calculator-grid,
            .tools-grid { 
                grid-template-columns: 1fr; 
                gap: 16px; 
            }
            
            /* Layout Adjustments */
            .graph-btn-grid, .btn-grid { 
                grid-template-columns: repeat(2, 1fr); 
            }
            
            .graph-form-grid, .form-grid { 
                grid-template-columns: 1fr; 
            }
            
            /* Author Card */
            .author-card { 
                flex-direction: column; 
                text-align: center; 
                padding: 20px 15px;
            }
            
            /* Footer Cleanup */
            .footer-content {
                display: grid;
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 30px 20px;
                text-align: center;
            }
            
            .legal-disclaimer {
                padding: 20px 15px;
            }
            
            .legal-links {
                display: flex;
                flex-direction: column;
                gap: 12px;
            }
            
            /* Table scroll */
            .table-wrapper {
                margin: 16px 0;
            }
        }

        /* ==========================================
           EXTRA SMALL SCREENS (Max 480px)
           ========================================== */
        @media (max-width: 480px) {
            .graph-btn-grid, .btn-grid { 
                grid-template-columns: 1fr; 
            }
            
            .graph-eq-label, .eq-label {
                font-size: 0.75rem;
            }
            
            .ai-summary-box, .summary-box {
                padding: 16px;
            }
            
            .logo-title {
                font-size: 1.2rem !important;
            }
            
            h1 { font-size: 1.5rem; }
            h2 { font-size: 1.25rem; }
            h3 { font-size: 1.1rem; }
        }

        /* ==========================================
           THEME-AWARE LINK COLORS (ensures visibility)
           ========================================== */
        .seo-content-section a,
        .quick-answer a,
        .faq a,
        .author-card a,
        .legal-disclaimer a {
            color: #0066cc;
        }
        [data-theme="dark"] .seo-content-section a,
        [data-theme="dark"] .quick-answer a,
        [data-theme="dark"] .faq a,
        [data-theme="dark"] .author-card a,
        [data-theme="dark"] .legal-disclaimer a {
            color: #5dade2;
        }
        [data-theme="solar"] .seo-content-section a,
        [data-theme="solar"] .quick-answer a,
        [data-theme="solar"] .faq a,
        [data-theme="solar"] .author-card a,
        [data-theme="solar"] .legal-disclaimer a {
            color: #ffd700;
        }