<!DOCTYPE html>
<html lang="pt-br">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Desafio 1 - Grid Layout</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="container">
        <header class="caixa" id="topo">
            Topo
        </header>
        <nav class="caixa" id="menu">
            Menu
        </nav>
        <main class="caixa" id="principal">
            Principal
        </main>
        