#cajasombra {
    background-color: lightgrey;
    width: 310px;
    padding: 10px;
    box-shadow: 5px 5px;
}

#cajanegra {
    background-color: black;
    padding: 10px;
    color: white;
}

#sombraclara {
    background-color: grey;
    width: 200px;
    padding: 10px;
    box-shadow: 5px 5px 5px lightgoldenrodyellow;
}

#sombraredondeada {
    color: white;
    background-color: green;
    width: 350px;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 10px -10px 5px black;
}

#resplandor {
    background-color: black;
    color: white;
    padding: 50px;
}

#resplandorblanco {
    border: 1px solid white;
    box-shadow: 0px 0px 30px 5px white;
    width: 150px;
    padding: 10px;
}

#resplandorverde {
    border: 1px solid green;
    box-shadow: 0px 0px 30px 10px green;
    width: 150px;
    padding: 10px;
}

.cajasimplesombrasimple {
    margin: 40px;
    border: 1px solid black;
    width: 160px;
    height: 60px;
    box-shadow: 10px 10px blue;
}

.cajasimplesombrainterna {
    margin: 40px;
    border: 1px solid black;
    width: 160px;
    height: 60px;
    box-shadow: inset 5px 5px 5px grey;
}

.cajasimplesombramultiple {
    margin: 40px;
    border: 1px solid black;
    width: 160px;
    height: 60px;
    box-shadow: -10px -10px 20px blue, 10px -10px 20px red, 10px 10px 20px yellow, -10px 10px 20px green;
}

.cajasimplesombraopaca {
    margin: 40px;
    border: 1px solid black;
    width: 160px;
    height: 60px;
    box-shadow: 10px 10px 10px grey;
}

.cajasimplesombraintext {
    margin: 40px;
    border: 1px solid black;
    width: 160px;
    height: 60px;
    box-shadow: inset 5px 5px 5px grey, 5px 5px 5px grey;
}