*{ box-sizing: border-box; margin: 0; padding; 0 }


.contenedor{ max-width: 75rem; margin: auto;}
header{ width: 100%; background: #2ace37; height: 10rem;}
nav{ width: 100%; background: pink; height: 4rem;}
    section{background: #d0cbcb; display: flex; justify-content: space-around}
    section article{ width: 45%; background: orange; height: 20rem; margin: 3rem 0 3rem 0;}
aside{background: #ddd; display: flex; justify-content: space-around}
aside .ancho65{background: orange; height: 15rem; width:65%; margin: 2rem 0;}
aside .ancho30{background: #bf7de3; height: 15rem; width: 30%; margin: 2rem 0;}
footer {width: 100%; background: green; height: 4rem;}