@charset "utf-8";
*{
    margin: o;
    padding: 0;
    font-family: serif;
  text-decoration: none;
  box-sizing: border-box;
}
header {
    background-color:coral;
     width: 100%;
    height: 15em;

}
header nav ul li {
    display: inline-block;
    margin-right: 1em;
}
header nav ul li a {
    display: block;
    background-color: white;
    color: black;
    padding: 0 2em;
    text-decoration: none;
    line-height: 2em;
}
main, aside {
    float: left;   
}
main {
    background-color:bisque;
    
}
footer{
    background-color:gainsboro;
}
aside{
    background-color:lightsteelblue
          font-size: 0.7em;
padding: 6em 6em 0 0;
}
footer{
font-size: 0.9em;
margin: 0 auto;
width: 80%;
padding: 0am 6em;

line-height: 1em;
text-align: left;
}
footer #logos img{
  padding: 1em 1em ;
}


@media screen and (min-width: 40em) {
    
    #contenido {
        padding-bottom: 0;   
    }
    
    main {
        width: calc(70% - 1em);   
        margin-right: 1em;
    }
    
    aside {
        width: 30%;
    }
    
}