Mini layout simple

html:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Layout</title>
    <link rel="stylesheet" href="css/layout.css">
</head>
<body>
    <div id="cabecera">
        <h1>Esto es la cabecera</h1>
    </div>
    <div id="barra">
        <ul>
            <li><a href="">Inicio</a></li>
            <li><a href="">Contacto</a></li>
            <li><a href="">Productos</a></li>
            <li><a href="">faq</a></li>
        </ul>
    </div>
    <div id="contenido">
        <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Assumenda quasi explicabo, quibusdam quas obcaecati aliquam mollitia ad rerum maxime facere dolor, earum nisi in deleniti sit tempore nam expedita omnis.</p>
        <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Assumenda quasi explicabo, quibusdam quas obcaecati aliquam mollitia ad rerum maxime facere dolor, earum nisi in deleniti sit tempore nam expedita omnis.</p>
        <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Assumenda quasi explicabo, quibusdam quas obcaecati aliquam mollitia ad rerum maxime facere dolor, earum nisi in deleniti sit tempore nam expedita omnis.</p>
        <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Assumenda quasi explicabo, quibusdam quas obcaecati aliquam mollitia ad rerum maxime facere dolor, earum nisi in deleniti sit tempore nam expedita omnis.</p>
    </div>
    <div id="pie">
        <p>(c) Jotapé 2021</p>
    </div>
</body>
</html>

css:

*{
    margin:0;
}
#cabecera{
    background-color: pink;
    height: 150px;
    margin: 0;
    padding: 5px;
}
#barra{
    background-color: turquoise;
    width:100px;
    float:left;
    min-height: 500px;
    padding: 20px;
}
#barra ul{
    list-style: none;
    margin:0;
    padding: 5px;
   
}
#contenido{
    background-color: wheat;
    margin: 0;
    min-height: 500px;
    padding: 20px;
}
#pie{
    background-color: black;
    color: white;
    height: 50px;
    clear:left;
    margin: 0;
}

Semántico:

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Layout</title>
    <link rel="stylesheet" href="css/layout.css">
</head>

<body>
    <header>
        <h1>Esto es la cabecera</h1>
    </header>
    <aside>
        <ul>
            <li><a href="">Inicio</a></li>
            <li><a href="">Contacto</a></li>
            <li><a href="">Productos</a></li>
            <li><a href="">faq</a></li>
        </ul>
    </aside>
    <main>
        <section>
            <h1>Artículo 1</h1>
            <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Assumenda quasi explicabo, quibusdam quas
                obcaecati aliquam mollitia ad rerum maxime facere dolor, earum nisi in deleniti sit tempore nam expedita
                omnis.</p>
            <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Assumenda quasi explicabo, quibusdam quas
                obcaecati aliquam mollitia ad rerum maxime facere dolor, earum nisi in deleniti sit tempore nam expedita
                omnis.</p>
        </section>
        <section>
            <h1>Artículo 2</h1>
            <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Assumenda quasi explicabo, quibusdam quas
                obcaecati aliquam mollitia ad rerum maxime facere dolor, earum nisi in deleniti sit tempore nam expedita
                omnis.</p>
            <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Assumenda quasi explicabo, quibusdam quas
                obcaecati aliquam mollitia ad rerum maxime facere dolor, earum nisi in deleniti sit tempore nam expedita
                omnis.</p>
        </section>
    </main>
    <footer>
        <p>(c) Jotapé 2021</p>
    </footer>
</body>

</html>
*{
    margin:0;
}
header{
    background-color: pink;
    height: 150px;
    margin: 0;
    padding: 5px;
}
header h1{
    text-align: center;
}
aside{
    background-color: turquoise;
    width:100px;
    float:left;
    min-height: 500px;
    padding: 20px;
}
aside ul{
    list-style: none;
    margin:0;
    padding: 5px;
   
}
main{
    background-color: wheat;
    margin: 0;
    min-height: 500px;
    padding: 20px;
}
footer{
    background-color: black;
    color: white;
    height: 50px;
    clear:left;
    margin: 0;
}
section{
    float:left;
    width: 40%;
    margin-left: 10px;
}