body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            font-size: 20px;
            color: #333;
            max-width: 1000px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f8f9fa;
        }
        
        header {
            padding: 20px;
            background-color: rgb(7, 7, 115);
            color: white;
            border-radius: 8px;
            margin-bottom: 30px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        header h1 {
            margin-top: 0;
        }
        
        nav {
            margin-bottom: 20px;
        }
        
        nav a {
            display: inline-block;
            padding: 8px 16px;
            background-color: #4263ce;
            color: white;
            text-decoration: none;
            border-radius: 4px;
            transition: background-color 0.3s;
            margin-right: 10px;
        }
        
        nav a:hover {
            background-color: #1d47c7;
        }
        
        .content-section {
            background-color: white;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        h2 {
            color: #3047bb;
            border-bottom: 2px solid #2a3cb1;
            padding-bottom: 10px;
        }
        
        pre {
            background-color: #f5f5f5;
            padding: 15px;
            border-radius: 5px;
            overflow-x: auto;
            border-left: 4px solid #1149c3;
            font-family: 'Courier New', Courier, monospace;
        }
        
        .code-comment {
            color: #b60c1d;
            font-style: italic;
        }

        code {
            font-family: Consolas,"courier new";
            color: crimson;
            padding: 2px;
            font-size: 105%;
        }
        
        .terminal-output {
            background-color: #2f3136;
            color: #ffffff;
            padding: 15px;
            border-radius: 5px;
            margin-top: 10px;
            font-family: 'Courier New', Courier, monospace;
        }
        
        .highlight {
            background-color: #ffff99;
            padding: 2px 4px;
        }

        .highlight::before {
            content: "⚠️Importante: ";
            font-weight: bold;
        }
        
        .content-image {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 20px auto;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        .exercise-section {
            background-color: #e8f5e9;
            border-radius: 8px;
            padding: 20px;
            margin-top: 30px;
            border-left: 4px solid #0e40e4;
        }
        
        .quiz-form {
            margin-top: 20px;
        }
        
        .quiz-question {
            margin-bottom: 20px;
            padding: 15px;
            background-color: #f1f1f1;
            border-radius: 8px;
        }
        
        .options-list {
            list-style-type: none;
            padding: 0;
        }
        
        .options-list li {
            margin-bottom: 10px;
        }
        
        .options-list label {
            display: block;
            padding: 10px;
            background-color: #ffffff;
            border: 1px solid #ddd;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .options-list label:hover {
            background-color: #f9f9f9;
            border-color: #4CAF50;
        }
        
        .submit-btn {
            background-color: #564caf;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            margin-top: 15px;
        }
        
        .submit-btn:hover {
            background-color: #1e38cf;
        }
        
        footer {
            text-align: center;
            margin-top: 30px;
            padding: 20px;
            background-color: rgb(7, 7, 115);
            color: white;
            border-radius: 8px;
        }
        
        .navigation-buttons {
            display: flex;
            justify-content: space-between;
            margin-top: 30px;
        }

        .table-container {
            overflow-x: auto;
            margin: 20px 0;
        }
        
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 15px 0;
        }
        
        th, td {
            border: 1px solid #ddd;
            padding: 12px;
            text-align: left;
        }
        
        th {
            background-color: #f2f2f2;
            font-weight: bold;
        }
        
        tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        
        tr:hover {
            background-color: #f1f1f1;
        }

        .error-output {
            background-color: #f8d7da;
            color: #721c24;
            padding: 15px;
            border-radius: 5px;
            margin-top: 10px;
            font-family: 'Courier New', Courier, monospace;
            border-left: 4px solid #dc3545;
        }

        .warning-box {
            background-color: #fff3cd;
            color: #856404;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            border-left: 4px solid #ffc107;
        }

        .tip-box {
            background-color: #d1ecf1;
            color: #0c5460;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            border-left: 4px solid #17a2b8;
        }

        .good-practice {
            background-color: #d4edda;
            color: #155724;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            border-left: 4px solid #28a745;
        }
        
        .bad-practice {
            background-color: #f8d7da;
            color: #721c24;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            border-left: 4px solid #dc3545;
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
        
        .comparison-table th, .comparison-table td {
            border: 1px solid #ddd;
            padding: 12px;
            text-align: left;
        }
        
        .comparison-table th {
            background-color: #f2f2f2;
        }
        
        .comparison-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        
        .comparison-table .bad {
            color: #dc3545;
            background-color: #f8d7da;
            font-weight: bold;
        }
        
        .comparison-table .good {
            color: #28a745;
            background-color: #d4edda;
            font-weight: bold;
        }

        .info-box {
            background-color: #e3f2fd;
            color: #0d47a1;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            border-left: 4px solid #2196F3;
        }

        .summary-box {
            background-color: #fafafa;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            border-left: 4px solid #9e9e9e;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        .tip-box {
            background-color: #d4edda;
            color: #155724;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            border-left: 4px solid #28a745;
        }

         .formula-box {
            background-color: #f8f9fa;
            padding: 15px;
            border-radius: 5px;
            margin: 15px 0;
            border: 1px solid #ddd;
            display: flex;
            justify-content: center;
            align-items: center;
            font-family: 'Cambria Math', serif;
            font-size: 1.2em;
        }
        
        .grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin: 20px 0;
        }
        
        .grid-item {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        .code-error {
            color: #dc3545;
            text-decoration: line-through;
        }

        .formula {
            font-family: 'Cambria Math', 'Times New Roman', serif;
            font-size: 1.2em;
            text-align: center;
            margin: 20px 0;
            background-color: #f9f9f9;
            padding: 15px;
            border-radius: 5px;
        }

        .image-container {
            text-align: center;
            margin: 20px 0;
        }
        
        .image-row {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            margin: 20px 0;
        }
        
        .image-row img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

         .truth-table {
            width: auto;
            margin: 20px auto;
        }
        
        .truth-table th {
            background-color: #4CAF50;
            color: white;
        }
        
        .truth-table td, .truth-table th {
            text-align: center;
            padding: 10px 20px;
        }

        .method-diagram {
            width: 100%;
            max-width: 600px;
            margin: 20px auto;
            padding: 15px;
            border: 2px solid #4CAF50;
            border-radius: 8px;
            background-color: #f9f9f9;
        }
        
        .method-header {
            padding: 10px;
            background-color: #4CAF50;
            color: white;
            border-radius: 5px;
            margin-bottom: 10px;
            font-family: 'Courier New', Courier, monospace;
            font-weight: bold;
        }
        
        .method-body {
            padding: 10px;
            border: 1px dashed #4CAF50;
            border-radius: 5px;
            margin-bottom: 10px;
            font-family: 'Courier New', Courier, monospace;
        }
        
        .method-return {
            padding: 10px;
            background-color: #e8f5e9;
            border-radius: 5px;
            font-family: 'Courier New', Courier, monospace;
        }

        .flow-diagram {
            width: 100%;
            max-width: 600px;
            margin: 20px auto;
            padding: 15px;
            border: 2px solid #4CAF50;
            border-radius: 8px;
            background-color: #f9f9f9;
            text-align: center;
        }
        
        .flow-condition {
            padding: 10px;
            background-color: #4CAF50;
            color: white;
            border-radius: 5px;
            margin-bottom: 10px;
            display: inline-block;
            min-width: 200px;
        }
        
        .flow-block {
            padding: 10px;
            border: 1px dashed #4CAF50;
            border-radius: 5px;
            margin: 10px auto;
            display: inline-block;
            min-width: 200px;
        }
        
        .flow-arrow {
            font-size: 24px;
            color: #4CAF50;
            margin: 5px 0;
        }

                .solution {
            display: none;
        }
        
        .show-solution-btn {
            background-color: #007bff;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            margin-top: 15px;
            margin-bottom: 15px;
        }
        
        .show-solution-btn:hover {
            background-color: #0056b3;
        }


                .chapter-list {
            background-color: white;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        .chapter-section {
            margin-bottom: 30px;
        }
        
        .chapter-section h2 {
            color: #202cdf;
            border-bottom: 2px solid #296edc;
            padding-bottom: 10px;
        }
        
        .chapter-links {
            list-style-type: none;
            padding: 0;
        }
        
        .chapter-links li {
            margin-bottom: 10px;
        }
        
        .chapter-links a {
            display: block;
            padding: 10px 15px;
            background-color: #f1f1f1;
            color: #333;
            text-decoration: none;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        
        .chapter-links a:hover {
            background-color: #e0e0e0;
            transform: translateY(-2px);
            box-shadow: 0 2px 3px rgba(0, 0, 0, 0.1);
        }
        
        .chapter-links a .chapter-number {
            font-weight: bold;
            color: #271fba;
            margin-right: 10px;
        }

        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .definicao {
            background-color: #f0f4ff;
            color: #1a237e;
            padding: 15px 20px;
            border-radius: 5px;
            margin: 20px 0;
            border-left: 4px solid #3f51b5;
            font-size: 1.05em;
            line-height: 1.8;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
        }

        .definicao::before {
            content: "📖 Definição: ";
            font-weight: bold;
            color: #3f51b5;
        }

        .exemplo {
            background-color: #ecffe1;
            color: #f57f17;
            padding: 20px;
            border-radius: 8px;
            margin: 20px 0;
            border-left: 5px solid #fbc02d;
            font-family: 'Courier New', Courier, monospace;
            font-size: 1.1em;
            line-height: 2;
            box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
        }

.exemplo::before {
    content: "💡 Exemplo Prático: ";
    font-weight: bold;
    color: #f57f17;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: block;
    margin-bottom: 10px;
}

.exemplo code {
    background-color: #ff99006e;
    padding: 3px 6px;
    border-radius: 3px;
    color: #d84315;
    font-weight: bold;
}

.dica {
    background-color: #e0f7fa;
    color: #006064;
    padding: 15px 20px;
    border-radius: 5px;
    margin: 20px 0;
    border-left: 4px solid #00acc1;
    font-size: 1.05em;
    line-height: 1.8;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}
.dica::before {
    content: "DICA: ";
    font-weight: bold;
}

.challenge-box {
    background-color: #fff3e0;
    color: #e65100;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border-left: 5px solid #ff9800;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1.1em;
    line-height: 1.8;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
}