body{font-family: 'Open Sans', 'Arial', 'Helvetica', sans-serif;
    background: rgb(240,255,254) linear-gradient(0deg, rgba(240,255,254,1) 0%, rgba(92,212,202,1) 90%, rgba(92,212,202,1) 100%);
text-align: center;
background-repeat: no-repeat;
    background-attachment: fixed;
}
h1{
    margin-top:5px;
    margin-bottom: 5px;
    font-size: 55px;
}
h3{
    margin-bottom: 5px;
    margin-top:5px;
    font-size:25px;
}
.demo-screen p{
    font-size: 1.5rem;
}
.demo-screen img{
    max-width: 95vw;
}
@media only screen and (min-width: 768px) {
    h1{font-size:72px; margin-bottom:5px;}
    h3{font-size:30px; margin-top:5px;}