*{
    box-sizing: border-box;
    padding: 0px;

}



#contenedor{
    width: 600px;
    box-sizing: border-box;
    padding: 20px 20px;
    margin: 50px auto;
    background-color: beige;
    border:4px solid red;
    margin-top: 100px;
    
}

h1, h2, p{
    font-size: 2em;
}