header {padding: 6rem; background: #fdf4f4}
nav {padding: 1.5rem; background: #edd5d5}
.articulos1 {display: flex; justify-content: space-between; padding: 4rem 1rem 1rem 1rem;  background: #e5e5e5}
main section article {padding: 15rem; width: 50%; margin: 1rem; background: #ffffff}
aside {display: flex; justify-content: space-between; padding: 1rem 1rem 3rem 1rem;  background: #cbcaca}
.articulo2A {padding: 5rem; width: 75%; margin: 1rem; background: #ffffff}
.articulo2B {padding: 5rem; width: 25%; margin: 1rem; background: #ffffff}
footer {padding: 5rem; background: #908c8c}