* {
    box-sizing: border-box;
    list-style: none;
    margin: 0;
    padding: 0;
}
main {
    text-align: center
}
header {
    margin:10px 10px
}
header nav ul { 
     list-style: none;
     margin: none;
     padding: 0;
     display: flex;
     flex-direction: row;
     align-content: space-around;
     justify-content: space-around;
}
body  {
    background-image: url(../imagenes/atras.jpg);
    margin: 0;
    padding: 0;
}
p{
    font-family: "Quicksand";
    padding:10px 20px;
    text-align: center;
    font-size: 12px;
}
nav{
    background-color:black;
    margin:10px 0px 0px 0px;
    display: flex;
        justify-content: center;
}
a{
    font-family: "Quicksand";
    font-size: 14px;
    text-decoration: none;
    margin:auto;
    color: ghostwhite;
    padding:5px 25px;
}
a:hover{
    background-color:whitesmoke;
    color: black;   
}
h1{
    font-family: "Quicksand";
    font-size: 18px;
    color:deepskyblue;
    text-align: center;
    padding:20px 0px;
}
.centro {
    max-width: 100%;
    height: auto;
    margin: auto;
}
h3{
    font-family: "Quicksand";
    font-size: 20px;
    color: black;
    text-align: center
}
.contenedor {
    padding:5px 500px;
    display: block;
    position:absolute;
    top: 400px;
} 
h5,h6{
    font-family: "Quicksand";
    color: #fff;
    font-size: 15px;
    list-style: circle;
}
h5{
    background-color:darkred;
    position:absolute;
    top: ;
    bottom: ;
    right:;
    left:300px;
}
ul .w:hover{
    background-color:whitesmoke;
    color: black;
    padding: 5px 10px;
}
ul li > ul{
    display: none;
}
ul li:hover > ul{
    display: block;
}
h6{
    background-color:#0AA3B4;
    position:absolute;
    top: ;
    bottom: ;
    right:-60px;
    left:;
}
ul .e:hover{
    background-color:whitesmoke;
    color: black;
    padding: 5px 10px;
}
ul li > ul{
    display: none;
}
ul li:hover > ul{
    display: block;
}
/*****

/* a partir de 320px o más */

@media screen and (min-width:20em) {
    nav ul {
		display: flex;
        flex-direction: column;
    }
    nav > a{
        flex-grow: 1;
    }
}