header{
    background-color: rgba(169, 169, 169, 0.534);
    color: #ffffff;
    text-align: center;
    background-image: url(img/fondooo.jpg);
}
ul{
    list-style-type: none;
    margin: 0;
    padding: 0;
    display:flex;
    flex-direction: row;
}
li{flex-grow: 1;}
.barra{
    display: block;
    padding: 1em;
    background-color: grey;
    text-align: center;
    margin-right:0.2em;
    text-decoration: none;
    color: #000;
    font-size: 1em;
}
.barra:hover{
    background-color: cyan;
}
.intro{
    text-align:center;
}
footer{
    text-align: center;
}
body{
    background-image: url(img/fondooo.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    color: white;
}
.inter{
    text-align: center;
    font-size: medium;
}
h1{
    text-align: center;
}
h3{
    text-align: center;
}
.cuerpo{
    text-align: center;
}
img{
    border-radius: 50%;
}