:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --success-color: #27ae60;
            --warning-color: #f39c12;
            --info-color: #17a2b8;
            --bg-color: #f4f7f6;
            --text-color: #333;
            --border-color: #ddd;
        }

       body
        {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background: var(--bg-color);
            max-width:1000px;
            margin: 30px auto;
            padding:50px;
            box-shadow: 0 2px 30px rgba(0,0,0,0.1);
        }
        header 
        {
            text-align: center;
            padding-bottom: 30px;
            border-bottom: 3px solid var(--secondary-color);
            background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
            color: white;
            padding: 50px;
            margin: -50px -50px 0px -50px;
            border-radius: 8px 8px 0px 0px;
            
        }

        h1 {
            
            padding-bottom: 10px;
            border-bottom: 0px solid var(--secondary-color);
        }

        h2 {
            color: var(--primary-color);
            margin-top: 40px;
            border-left: 4px solid var(--secondary-color);
            padding-left: 10px;
        }

        h3 {
            color: #555;
            margin-top: 25px;
        }

        h4 {
            color: #666;
            margin-top: 20px;
            font-weight: 600;
        }

        p {
            margin-bottom: 15px;
            text-align: justify;
        }

        ul, ol {
            margin-bottom: 15px;
            padding-left: 20px;
        }

        li {
            margin-bottom: 8px;
        }

        .screenshot-placeholder 
        {
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 8px;
            padding: 5px;
            margin: 0px;
            text-align: center;
            color: #6c757d;
        }
        .screenshot-placeholder p
        {
            text-align: center;
            align-self: center;
            margin: auto;
        }
        .screenshot-placeholder img {
            max-width: 100%;
            border-radius: 6px;
            margin-bottom: 10px;
            border: 1px solid #dee2e6;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 20px;
            margin: 20px 0;
        }

        .feature-card {
            background: #f8f9fa;
            border: 1px solid #e9ecef;
            padding: 20px;
            border-radius: 6px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }

        .feature-card h3 {
            margin-top: 0;
            color: var(--secondary-color);
            border-bottom: 1px solid #dee2e6;
            padding-bottom: 8px;
        }

        .chart-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 20px;
            margin: 20px 0;
        }

        .chart-card {
            background: white;
            border: 1px solid #e3e3e3;
            padding: 15px;
            border-radius: 6px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        .chart-card h4 {
            margin-top: 0;
            color: var(--primary-color);
        }

        .status-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 10px;
            margin: 15px 0;
        }

        .status-item {
            padding: 10px;
            border-radius: 5px;
            text-align: center;
            font-weight: 500;
        }

        .status-replied { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
        .status-waiting { background-color: #fff3cd; color: #856404; border: 1px solid #ffeeba; }
        .status-delayed { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
        .status-lost { background-color: #d6d8d9; color: #1b1e21; border: 1px solid #c6c8ca; }

        .menu-list li {
            list-style-type: none;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="%233498db" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="3"></circle><path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1 0 2.83 2 2 0 0 1-2.83 0l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-2 2 2 2 0 0 1-2-2v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83 0 2 2 0 0 1 0-2.83l.06-.06a1.65 1.65 0 0 0 .33-1.82 1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1-2-2 2 2 0 0 1 2-2h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 0 1 0-2.83 2 2 0 0 1 2.83 0l.06.06a1.65 1.65 0 0 0 1.82.33H9a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 2-2 2 2 0 0 1 2 2v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 0 1 2.83 0 2 2 0 0 1 0 2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 2 2 2 2 0 0 1-2 2h-.09a1.65 1.65 0 0 0-1.51 1z"></path></svg>') no-repeat left center;
            padding-left: 24px;
        }

        .info-box {
            background-color: #d1ecf1;
            color: #0c5460;
            border: 1px solid #bee5eb;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
        }

        .warning-box {
            background-color: #fff3cd;
            color: #856404;
            border: 1px solid #ffeeba;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
        }

        .success-box {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
        }

        .technical-box {
            background-color: #e8f4f8;
            color: #0c5460;
            border: 1px solid #b6e0f5;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            font-family: monospace;
            font-size: 0.9em;
        }

        code {
            background-color: #e8f4f8;
            color: #0c5460;
            border: 1px solid #b6e0f5;
            padding: 2px 6px;
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-size: 0.9em;
        }

        .toc-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
            margin: 20px 0;
            padding: 15px;
            background-color: #f8f9fa;
            border-radius: 6px;
        }

        .toc-grid a {
            color: var(--secondary-color);
            text-decoration: none;
            padding: 5px 10px;
            border-radius: 4px;
            transition: background-color 0.2s;
        }

        .toc-grid a:hover {
            background-color: #e3f2fd;
            text-decoration: underline;
        }

        .version-badge 
        {
            background-color: hsla(54, 65%, 51%, 0.965);
            color: #1e1d1d;
            border-radius: 15px; 
            font-size:6pt; 
            padding:10px; 
            margin: auto 0px; 
        }

        .section-separator {
            border: 0;
            height: 1px;
            background: linear-gradient(to right, transparent, var(--border-color), transparent);
            margin: 30px 0;
        }

        .layout-diagram {
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
            font-family: monospace;
            font-size: 0.9em;
            line-height: 1.4;
        }

        .icon-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 15px 0;
        }

        .icon-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 5px 10px;
            background-color: #f0f7ff;
            border-radius: 4px;
            font-size: 0.9em;
        }

        .two-column {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 20px 0;
        }

        .three-column {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin: 20px 0;
        }

        .activity-status {
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 10px 0;
            padding: 8px;
            background-color: #f8f9fa;
            border-radius: 5px;
        }

        .activity-status .status-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }

        .activity-status.replied .status-dot { background-color: #28a745; }
        .activity-status.waiting .status-dot { background-color: #ffc107; }
        .activity-status.delayed .status-dot { background-color: #dc3545; }
        .activity-status.lost .status-dot { background-color: #6c757d; }

        @media (max-width: 768px) {
            .two-column, .three-column {
                grid-template-columns: 1fr;
            }
            .toc-grid {
                grid-template-columns: 1fr;
            }
            .feature-grid, .chart-grid {
                grid-template-columns: 1fr;
            }
        }