body {
            font-family: Arial, sans-serif;
            max-width: 800px;
            margin: 50px auto;
            padding: 20px;
        }
        
        h1 {
            color: #333;
            font-size: 24px;
            margin-bottom: 10px;
        }
        
        .objetivo {
            background-color: #f0f0f0;
            padding: 15px;
            margin-bottom: 30px;
            border-left: 4px solid #333;
        }
        
        .area-entrada {
            margin-bottom: 20px;
            display: flex;
            gap: 10px;
        }
        
        #inputTarefa {
            flex: 1;
            padding: 10px;
            border: 1px solid #ccc;
            font-size: 16px;
        }
        
        #botaoAdicionar {
            padding: 10px 20px;
            background-color: #333;
            color: white;
            border: none;
            cursor: pointer;
            font-size: 16px;
        }
        
        #botaoAdicionar:hover {
            background-color: #555;
        }
        
        #listaTarefas {
            list-style: none;
            padding: 0;
        }
        
        .item-tarefa {
            background-color: #f9f9f9;
            padding: 15px;
            margin-bottom: 10px;
            border: 1px solid #e0e0e0;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .item-tarefa.completa {
            opacity: 0.6;
            text-decoration: line-through;
        }
        
        .botoes-tarefa {
            display: flex;
            gap: 5px;
        }
        
        .btn-completar {
            padding: 5px 10px;
            background-color: #666;
            color: white;
            border: none;
            cursor: pointer;
            font-size: 14px;
        }
        
        .btn-deletar {
            padding: 5px 10px;
            background-color: #999;
            color: white;
            border: none;
            cursor: pointer;
            font-size: 14px;
        }
        
        .btn-completar:hover {
            background-color: #888;
        }
        
        .btn-deletar:hover {
            background-color: #bbb;
        }
        
        .codigo {
            background-color: #f5f5f5;
            border: 1px solid #ddd;
            padding: 20px;
            margin-top: 30px;
            font-family: monospace;
            white-space: pre-wrap;
            font-size: 14px;
        }
        
        .todo {
            background-color: yellow;
            padding: 2px 4px;
        }
        
        .dica {
            margin-top: 20px;
            padding: 15px;
            background-color: #e8f4f8;
            border: 1px solid #b8d4db;
        }