div {
    margin: 1% 25% 0% 20%; 
    font-family: Arial, Helvetica, sans-serif; 
    letter-spacing: .5px;
}

h1 {
    font-size:xx-large;
}

.caption {
    color: silver; 
    font-size: small; 
    margin-top:0;
    font-style: italic;
}
img {
  max-width: 100%;
  height: auto;
}

@media only screen and (max-width: 768px) {
    div {
    margin: 1% 5% 0% 5%; 
    font-family: Arial, Helvetica, sans-serif; 
    letter-spacing: .5px;
    }
}