body { 
    background: url(../multimedia/fondo.jpg) no-repeat center center fixed; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

div
{
color: rgb(5, 0, 0);
}

.panel-default {
opacity: 0.9;
margin-top:100px;
}

.form-group.last { 
    margin-bottom:0px; 
}

h1 {
    text-align: center;
    background: #000000;
    color: white;
    opacity: 1;
}

#subtitulo{
    font-size: x-large;
}

form{
    text-align: center;
}

.imagenindex {
    width: 70%;
}