body {
    color: white;
    text-align: center;
    background-image: url("../images/index\ fondo.png");
    background-repeat: no-repeat;
    background-size: cover;
}
h1 {
    background-color: grey;
    color: white;
    border-style: solid;
    border-width: 3px;
    border-left-color: red;
}
img {
    border-style: solid;
    border-width: 3px;
    border-radius: 15px;
}
ul {

}
li {

}
footer{
    float: left;
}
a:link {
    color: white ;
    }
a:visited {
    color: gainsboro; /* verde */
    }
a:hover {
    color:black; /* rojo */
    }