: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;
            --error-color: #e74c3c;
            --warning-color: #f39c12;
            --success-color: #2ecc71;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: white;
            color: var(--text-color);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
        }
        
        /* Header Styles */
        .navbar {
            background-color: white;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            border-bottom: 1px solid var(--border-color);
            padding: 0.75rem 0;
        }
        
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color);
            font-size: 1.5rem;
        }
        
        .nav-link {
            color: #555;
            font-weight: 500;
            transition: color 0.3s;
            padding: 0.5rem 1rem;
            border-radius: 6px;
        }
        
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.1);
        }
        
        .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;
        }
        
        .page-header::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background-image: radial-gradient(rgba(255,255,255,0.8) 1px, transparent 1px);
            background-size: 20px 20px;
            opacity: 0.3;
            transform: rotate(30deg);
        }
        
        .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);
        }
        
        /* Tool Card Styles */
        .tool-card {
            background: white;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 2rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.03);
        }
        
        .tool-header {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 25px;
            border-bottom: 1px solid var(--border-color);
        }
        
        .tool-header h2 {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        /* Form Styles */
        .form-label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-color);
        }
        
        .form-control {
            border: 1px solid #ddd;
            border-radius: 6px;
            padding: 0.75rem;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            font-weight: 600;
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            transition: all 0.3s;
        }
        
        .btn-primary:hover {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            transform: translateY(-1px);
        }
        
        .btn-outline-secondary {
            font-weight: 600;
            border-radius: 6px;
            padding: 0.75rem 1.5rem;
        }
        
        /* 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(--primary-color);
        }
        
        .result-content {
            font-family: 'Courier New', monospace;
            word-break: break-all;
            padding: 12px;
            background-color: white;
            border-radius: 4px;
            border: 1px solid #eee;
            font-size: 0.95rem;
            max-height: 400px;
            overflow-y: auto;
        }
        
        .copy-btn {
            position: absolute;
            top: 15px;
            right: 15px;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 0.4rem 0.75rem;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .copy-btn:hover {
            background-color: var(--light-gray);
        }
        
        /* Content Sections */
        .section-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .usage-step {
            display: flex;
            margin-bottom: 1.5rem;
            align-items: flex-start;
        }
        
        .step-number {
            width: 28px;
            height: 28px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            flex-shrink: 0;
            font-weight: 600;
            font-size: 0.9rem;
        }
        
        .info-box {
            background-color: rgba(44, 125, 160, 0.05);
            border-left: 3px solid var(--primary-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        
        .security-alert {
            background-color: #d4edda;
            border-left: 3px solid #28a745;
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        
        /* Validation Results */
        .validation-summary {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        
        .summary-card {
            flex: 1;
            min-width: 150px;
            padding: 1rem;
            border-radius: 8px;
            background-color: white;
            text-align: center;
            border: 1px solid var(--border-color);
        }
        
        .summary-value {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        
        .summary-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        .errors .summary-value {
            color: var(--error-color);
        }
        
        .warnings .summary-value {
            color: var(--warning-color);
        }
        
        .success .summary-value {
            color: var(--success-color);
        }
        
        .issues-list {
            max-height: 500px;
            overflow-y: auto;
            border: 1px solid #ddd;
            border-radius: 6px;
            padding: 1rem;
            background-color: white;
        }
        
        .issue-item {
            padding: 1rem;
            border-bottom: 1px solid #eee;
            display: flex;
            align-items: flex-start;
        }
        
        .issue-item:last-child {
            border-bottom: none;
        }
        
        .issue-icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            flex-shrink: 0;
        }
        
        .error-icon {
            background-color: rgba(231, 76, 60, 0.1);
            color: var(--error-color);
        }
        
        .warning-icon {
            background-color: rgba(243, 156, 18, 0.1);
            color: var(--warning-color);
        }
        
        .issue-content {
            flex: 1;
        }
        
        .issue-title {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        
        .issue-description {
            margin-bottom: 0.5rem;
            color: var(--text-muted);
        }
        
        .issue-location {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-family: monospace;
        }
        
        .issue-solution {
            background-color: rgba(44, 125, 160, 0.05);
            border-left: 2px solid var(--primary-color);
            padding: 0.75rem;
            border-radius: 0 4px 4px 0;
            margin-top: 0.5rem;
        }
        
        .issue-solution-title {
            font-weight: 600;
            margin-bottom: 0.25rem;
            color: var(--primary-color);
        }
        
        #editor {
            width: 100%;
            height: 300px;
            border: 1px solid #ddd;
            border-radius: 6px;
            margin-bottom: 1rem;
        }
        
        .editor-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0.5rem;
        }
        
        .editor-title {
            font-weight: 600;
            color: var(--text-color);
        }
        
        .editor-actions {
            display: flex;
            gap: 0.5rem;
        }
        
        .editor-btn {
            padding: 0.25rem 0.5rem;
            font-size: 0.8rem;
            border-radius: 4px;
            background: white;
            border: 1px solid var(--border-color);
            cursor: pointer;
        }
        
        .editor-btn:hover {
            background-color: var(--light-gray);
        }
        
        .loading-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(255, 255, 255, 0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 100;
            display: none;
        }
        
        .spinner {
            width: 40px;
            height: 40px;
            border: 4px solid rgba(44, 125, 160, 0.2);
            border-top: 4px solid var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .validation-options {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        
        .option-item {
            flex: 1;
            min-width: 200px;
        }
        
        .option-checkbox {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .option-checkbox input {
            margin: 0;
        }
        
        .validation-badge {
            display: inline-block;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-right: 0.5rem;
        }
        
        .error-badge {
            background-color: rgba(231, 76, 60, 0.1);
            color: var(--error-color);
        }
        
        .warning-badge {
            background-color: rgba(243, 156, 18, 0.1);
            color: var(--warning-color);
        }
        
        .success-badge {
            background-color: rgba(46, 204, 113, 0.1);
            color: var(--success-color);
        }
        
        .code-highlight {
            background-color: #fff8e1;
            padding: 0.1rem 0.25rem;
            border-radius: 3px;
            font-family: monospace;
        }
        
        .api-selector {
            margin-bottom: 1.5rem;
        }
        
        .api-selector label {
            font-weight: 600;
            margin-right: 1rem;
        }
        
        .api-selector select {
            padding: 0.5rem;
            border-radius: 4px;
            border: 1px solid #ddd;
        }
        
        /* SEO Impact Section */
        .seo-impact {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin: 2rem 0;
        }
        
        .seo-item {
            flex: 1;
            min-width: 250px;
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid #eaeaea;
            position: relative;
            overflow: hidden;
        }
        
        .seo-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
        }
        
        .seo-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
        }
        
        .seo-item i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            display: block;
            text-align: center;
            transition: transform 0.3s ease;
        }
        
        .seo-item:hover i {
            transform: scale(1.1);
        }
        
        .seo-item h5 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.75rem;
            text-align: center;
            position: relative;
            padding-bottom: 0.5rem;
        }
        
        .seo-item h5::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 2px;
            background: var(--primary-color);
        }
        
        .seo-item p {
            color: var(--text-muted);
            text-align: center;
            line-height: 1.6;
            margin-bottom: 0;
        }
        
        /* FAQ Items */
        .faq-item {
            background: white;
            border-radius: 8px;
            margin-bottom: 1.25rem;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            overflow: hidden;
            transition: all 0.3s ease;
            border: 1px solid #f0f0f0;
        }
        
        .faq-item:hover {
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transform: translateY(-2px);
        }
        
        .faq-question {
            padding: 1.25rem 1.5rem;
            background: linear-gradient(to right, rgba(44, 125, 160, 0.05), rgba(44, 125, 160, 0.03));
            cursor: pointer;
            display: flex;
            align-items: center;
            font-weight: 600;
            color: var(--primary-color);
            position: relative;
        }
        
        .faq-question::before {
            content: "Q:";
            font-weight: 700;
            margin-right: 0.75rem;
            color: var(--accent-color);
        }
        
        .faq-question::after {
            content: "\f107";
            font-family: "Font Awesome 5 Free";
            font-weight: 900;
            position: absolute;
            right: 1.5rem;
            transition: transform 0.3s ease;
        }
        
        .faq-item.active .faq-question::after {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            padding: 0 1.5rem;
            max-height: 0;
            overflow: hidden;
            transition: all 0.4s ease;
            background: white;
        }
        
        .faq-item.active .faq-answer {
            padding: 1.25rem 1.5rem;
            max-height: 500px;
        }
        
        .faq-answer p {
            margin-bottom: 0;
            color: var(--text-color);
            line-height: 1.7;
        }
        
        .faq-answer p:first-child {
            margin-top: 0;
        }
        
        .faq-answer p:last-child {
            margin-bottom: 0;
        }
        
        /* Responsive adjustments */
        @media (max-width: 768px) {
            .seo-item {
                min-width: 100%;
            }
            
            .faq-question {
                padding: 1rem;
                font-size: 1rem;
            }
            
            .faq-answer {
                padding: 0 1rem;
            }
            
            .faq-item.active .faq-answer {
                padding: 1rem;
            }
        }
 
        .description {             color: var(--text-muted);
            margin-bottom: 30px;
        }
        
        .editor-container {
            margin-bottom: 20px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            overflow: hidden;
        }
        
        #editor {
            width: 100%;
            height: 300px;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            padding: 15px;
            box-sizing: border-box;
            border: none;
            resize: vertical;
        }
        
        .button-group {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        
        button {
            padding: 10px 15px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }
        
        .btn-primary:hover {
            background-color: var(--accent-color);
        }
        
        .btn-secondary {
            background-color: var(--light-gray);
            color: var(--text-color);
            border: 1px solid var(--border-color);
        }
        
        .btn-secondary:hover {
            background-color: #e9ecef;
        }
        
        .validation-results {
            margin-top: 20px;
        }
        
        .summary {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        
        .summary-card {
            flex: 1;
            min-width: 150px;
            padding: 15px;
            border-radius: 6px;
            text-align: center;
            background: white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .errors { border-top: 4px solid var(--error-color); }
        .warnings { border-top: 4px solid var(--warning-color); }
        .success { border-top: 4px solid var(--success-color); }
        
        .summary-value {
            font-size: 24px;
            font-weight: bold;
            margin: 10px 0;
        }
        
        .issues-list {
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 15px;
            max-height: 400px;
            overflow-y: auto;
        }
        
        .issue-item {
            padding: 15px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: flex-start;
        }
        
        .issue-item:last-child {
            border-bottom: none;
        }
        
        .issue-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            flex-shrink: 0;
        }
        
        .error-icon {
            background-color: rgba(231, 76, 60, 0.1);
            color: var(--error-color);
        }
        
        .warning-icon {
            background-color: rgba(243, 156, 18, 0.1);
            color: var(--warning-color);
        }
        
        .success-icon {
            background-color: rgba(46, 204, 113, 0.1);
            color: var(--success-color);
        }
        
        .issue-content {
            flex: 1;
        }
        
        .issue-title {
            font-weight: 600;
            margin-bottom: 5px;
        }
        
        .issue-description {
            margin-bottom: 5px;
            color: var(--text-muted);
        }
        
        .issue-location {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-family: monospace;
        }
        
        .loading {
            display: none;
            text-align: center;
            padding: 20px;
        }
        
        .spinner {
            width: 40px;
            height: 40px;
            border: 4px solid rgba(44, 125, 160, 0.2);
            border-top: 4px solid var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
         
        .validation-options {
            display: flex;
            gap: 10px;
            margin-bottom: 15px;
            flex-wrap: wrap;
        }
        
        .option-checkbox {
            display: flex;
            align-items: center;
            gap: 5px;
        }