CSS
 @import url('https://fonts.googleapis.com/css?family=Roboto:300,400,700&display=swap');


*{
    font-family:'Roboto', sans-serif;
    text-align: center;
    margin: 50em;
    box-sizing: border-box;

}

body {
    background-color:snow;
    font-family:'Roboto', sans-serif;
    
}

header div{width: 400px;
    display: flex;
    justify-content: center;
    text-align: center;
    
}

header div img{width: 100%;
    height: auto;
    border-radius: 50em;
   position: relative;
  text-align: center;
}

 
h1 {
    display: flex;
    justify-content: center;
    color:crimson;
    font-size: 3em;
    font-family: 'Roboto', sans-serif;
    text-align: center;
    margin:inherit;
}

h3 {
    font-family:'Roboto 700', sans-serif;
    font-size: 150%;
    text-align: center;
    color:crimson;
    width: 50%;
    background-color:beige;
    margin: auto;
    text-align: center;
    display: inline-block;
}

header nav{display: flex;
    flex-direction: row;
    white-space: nowrap;
    justify-content: center;
    background-color: darkgrey;
    padding: inherit;
}

header nav ul li{
    display: inline;
    flex-direction: row;
    color: aqua;
    font-family: 'Roboto', sans-serif;
    list-style: none;
}

header nav ul li a{color: aqua;
    font-style: oblique;
    font-size: 1em;
    font-weight: 300;
    text-decoration: none;
    text-align: center;
    list-style: none;
    
}



main article p{text-align: center;
    font-style: oblique;
    
}
main ul li {list-style: none;
    font-family: 'Roboto', sans-serif;
text-align: center;}


footer{font-style: italic;
    font-size: 0.8em;
    justify-content: center;
    text-align: center;
    margin: 5em;
    
}

nav.contenedor ul li {
    display: inline;
    margin: 20px;      
    border-width: 0.1em;    
    width: 50%;
}



.center {
display: block;
margin-left: auto;
margin-right: auto;
}


/*position: relative;
    left: 60%;
      margin: 5em;
    padding: inherit;
    text-align: center;
*/