/* Top Navigation Bar - Like W3Schools */
        .topnav {
            background-color: #282A35;
            color: white;
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            border-bottom: 3px solid #04AA6D;
        }

        .nav-container {
            display: flex;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }


        .nav-links {
            display: flex;
            list-style: none;
            margin-left: 20px;
        }

        .nav-links li a {
            color: white;
            text-decoration: none;
            padding: 15px 20px;
            display: block;
            font-size: 16px;
            transition: background-color 0.3s;
        }

        .nav-links li a:hover {
            background-color: #000;
        }

        .nav-links li a.active {
            background-color: #04AA6D;
        }

        /* Main Layout - Sidebar and Content */
        .wrapper {
            display: flex;
            max-width: 1400px;
            margin: 0 auto;
            background-color: white;
            position: relative;
        }

        /* Left Sidebar - Like W3Schools */
        .sidebar {
            width: 220px;
            background-color: #E7E9EB;
            height: calc(100vh - 60px);
            position: sticky;
            top: 60px;
            overflow-y: auto;
            border-right: 1px solid #ccc;
            flex-shrink: 0;
        }

        .sidebar-header {
            padding: 15px;
            font-weight: bold;
            background-color: #16d3e0;
            color: white;
            font-size: 18px;
        }

        .sidebar-section {
            padding: 10px 0;
            border-bottom: 1px solid #ccc;
        }

        .sidebar-section-title {
            padding: 10px 15px;
            font-weight: bold;
            color: #282A35;
            font-size: 16px;
            cursor: pointer;
        }

        .sidebar-section-title:hover {
            background-color: #d3d6db;
        }

        .sidebar-links {
            list-style: none;
        }

        .sidebar-links li a {
            display: block;
            padding: 8px 15px 8px 30px;
            text-decoration: none;
            color: #282A35;
            font-size: 14px;
            transition: all 0.2s;
            border-left: 3px solid transparent;
        }

        .sidebar-links li a:hover {
            background-color: #d3d6db;
            border-left-color: #353438;
        }

        .sidebar-links li a.active-sidebar {
            background-color: #353438;
            color: white;
            border-left-color: #282A35;
        }

        /* Main Content Area */
        .content {
            flex: 1;
            padding: 30px 40px;
            background-color: white;
            min-height: calc(100vh - 60px);
            overflow-x: auto;
        }

        /* Content Typography */
        .content h1 {
            font-size: 42px;
            font-weight: 700;
            color: #282A35;
            margin-bottom: 20px;
            border-bottom: 1px solid #e6e9eb;
            padding-bottom: 15px;
        }

        .content h2 {
            font-size: 32px;
            color: #282A35;
            margin: 30px 0 15px;
        }

        .content h3 {
            font-size: 24px;
            color: #282A35;
            margin: 25px 0 15px;
        }

        .content p {
            margin-bottom: 15px;
            font-size: 16px;
        }

        /* Code Blocks */
        .code-block {
            background-color: #E7E9EB;
            padding: 20px;
            border-radius: 5px;
            margin: 20px 0;
            font-family: 'Consolas', monospace;
            border-left: 4px solid #353438;
            position: relative;
        }

        .code-block pre {
            margin: 0;
            white-space: pre-wrap;
            font-size: 14px;
        }

        .code-tag {
            position: absolute;
            top: 10px;
            right: 10px;
            background-color: #353438;
            color: white;
            padding: 3px 10px;
            border-radius: 3px;
            font-size: 12px;
        }

        /* Try It Yourself Button */
        .try-it-btn {
            background-color: #353438;
            color: white;
            border: none;
            padding: 12px 25px;
            font-size: 18px;
            border-radius: 25px;
            cursor: pointer;
            margin: 20px 0;
            transition: background-color 0.3s;
            border: none;
        }

        .try-it-btn:hover {
            background-color:#353438;
        }

        /* Info Boxes */
        .note-box {
            background-color: #ffffcc;
            border-left: 6px solid #ffeb3b;
            padding: 20px;
            margin: 20px 0;
            border-radius: 5px;
        }

        .tip-box {
            background-color: #d4edda;
            border-left: 6px solid #353438;
            padding: 20px;
            margin: 20px 0;
            border-radius: 5px;
        }

        .warning-box {
            background-color: #f8d7da;
            border-left: 6px solid #dc3545;
            padding: 20px;
            margin: 20px 0;
            border-radius: 5px;
        }

        /* Tables */
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            font-size: 15px;
        }

        .data-table th {
            background-color: #353438;
            color: white;
            padding: 12px;
            text-align: left;
        }

        .data-table td {
            padding: 12px;
            border-bottom: 1px solid #ddd;
        }

        .data-table tr:hover {
            background-color: #f5f5f5;
        }

        /* Example Boxes */
        .example-box {
            background-color: #E7E9EB;
            padding: 25px;
            border-radius: 8px;
            margin: 25px 0;
        }

        .example-header {
            font-weight: bold;
            margin-bottom: 15px;
            color: #282A35;
            font-size: 18px;
        }

        .demo-box {
            background-color: white;
            padding: 20px;
            border-radius: 5px;
            margin: 15px 0;
        }

        /* Buttons */
        .btn {
            background-color: #353438;
            color: white;
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
            margin: 5px;
        }

        .btn-black {
            background-color: #282A35;
        }

        .btn-black:hover {
            background-color: #3a3c4a;
        }

        /* Responsive */
        @media screen and (max-width: 992px) {
            .sidebar {
                width: 180px;
            }
        }

        @media screen and (max-width: 768px) {
            .wrapper {
                flex-direction: column;
            }
            
            .sidebar {
                width: 100%;
                height: auto;
                position: relative;
                top: 0;
            }
            
            .nav-links {
                display: none;
            }
        }