*{box-sizing: border-box; margin: 0; padding: 0}
.contenedor{width: 1200px;margin:auto;}
header{background-color: forestgreen; width: 100%;height: 7rem;}
section{background-color: cyan;display: flex; justify-content: space-around;width: 720px;float: left;padding: 1rem 0 1rem 0}
.Sec1{background-color: darkgoldenrod;height: 168px;margin:4rem 1rem 0rem 1rem; width:100%;}
.Sec2{background-color: darkgoldenrod;height: 168px;margin:0rem 1rem 1rem 1rem; width:100%;}
aside{background-color: teal; display: flex; width:480px;justify-content: space-around; height: 30rem;float: righ;}
footer{background-color: navajowhite; width:100%; height: 4rem;float: left}