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

.contenedor{max-width: 100rem; text-align: center;}
header{background: #A2D063; width: 100%; height: 15rem; display: flex; justify-content: center; align-items: center;}
nav{background: #F67CE9; width: 100%; height: 5rem; display: flex; justify-content: center; align-items: center;}
main{border: solid; border-width: 0.5rem; border-color:#674BC2; width: 100%; height: 70rem; display: inline-block;}
section{background: #30BCF1; display: flex; justify-content: center; align-items: center;}
section article{background: #F4BF4F; width: 50%; height: 35rem; margin: 3rem 1rem 1rem 1rem;display: flex; justify-content: center; align-items: center;}
aside{background: #A8A9AD; display: flex; justify-content: space-around;}
.ancho70{background: #F4BF4F; width: 70%; height: 24rem; margin: 3rem 1rem 3rem 1rem; display: flex; justify-content: center; align-items: center;}
.ancho30{background: #F4BF4F; width: 30%; height: 24rem; margin: 3rem 1rem 3rem 1rem; display: flex; justify-content: center; align-items: center;}
footer{background: #80A054; width: 100%; height: 10rem; display: flex; justify-content: center; align-items: center;}
h1{font-family: sans-serif; color: #FFFFFF; font-size: 2rem;}