body{font-family: 'Montserrat', sans-serif; background: white;}

header{background: limegreen; height: 10rem;}
nav{background: skyblue; height: 3rem;}
main{background: blue; height: 50rem;}


.contenedor{max-width: 80rem; margin: auto;}
.notas{display: flex; flex-wrap: wrap;}
.notasseccion{background: darkturquoise; box-sizing: border-box; height: 30rem;}
.notasprincipales{background: orange; margin:0.5rem; padding: 1rem; height: 27rem; width: 37rem; display:flex; justify-content: center; align-items: center;}

aside{display: flex; flex-wrap: wrap; position: absolute;}
.secundarias{background: grey; box-sizing: border-box; height: 20rem; width: 80rem; display: flex;}
.masleidas{background: orange; margin: 1.5rem; padding: 1rem; height: 3rem; display: flex; height: 15rem; width: 48rem;}
.publicidad{background: orange; margin: 1.5rem; padding: 1rem; height: 15rem; display: flex; width: 25rem;}
footer{height: 10rem; background: darkgreen;}