body{
    background-color: #374151;
    text-align: center;
    color: white;
    width: 90%;
    margin: auto;
    background-image: url(imagenes/carbonF.jpg!w700wp);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
}
h1{
    color: white;
    text-decoration: underline;
    font-size: 60px;
}
h2{
    text-decoration: underline;
    font-size: 60px;
}
img.aaa{
    width: 700px;
}
a{
    color: white;
    font-size: 20px;
}