@charset"utf-8";
@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,600,400italic);
@import url(https://fonts.googleapis.com/css?family=Lobster);
*{
    box-sizing: border-box;
    transition: 1s;
}


#pagina {
    max-width: 75em;
    margin: 0 auto;
}

body {
    background-color: antiquewhite
}

header, main, aside, footer {
    padding: 1em;    
}

main, aside {
    float: left;  
}
header {
    background-color: cadetblue;
}

#logo { 
    background-color: brown;
    border-radius: 50%;
    width: 9em;
    height: 8em;
    margin-top:1em;
}

#logo h1 { 
    font-family:'Lobster', cursive;     
    color: white; 
    text-align: center;
    line-height: 4em;
    margin: 1; padding: 1;
}

header nav {
    padding-top: 1em;
}
    
 header nav ul { 
    list-style: none;
    margin: 0; padding: 0;
        }
header nav ul li {
    display: inline-block;
    margin-right: 1em;   
    border-radius: 30%;
}
  
header nav ul li a {
    display: block;
    background-color: dodgerblue;
    color: white;
    padding: 0 2em;
    text-decoration: none;
    line-height: 2em;
}
    header nav ul li a:hover {
    background-color: white;
    color: dodgerblue;
} 

#contenido {
    padding: 1em 0; 
    overflow: auto;
}


  

main {
       width: 40em;
    margin-right: 1em;      
    
}
aside {
    background-color: brown;
    margin-bottom: none;
    text-align: center; color: white;
    font-family: 'Open Sans', sans-serif;
    width: 34em;
    
}
 aside img {
    border-radius: 40%;
}




footer {
    background-color: yellow;
    margin-top: 1em;
    font-style: italic;
    font-size: 1.5em;
  
     }


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