html, body {
height: 100%
}
body {
margin: 0px;
font-size: 40px;
}
section {
display: -webkit-box;
display: -webkit-flex;
display: -moz-box;
display: -ms-flexbox;
display: flex;
-webkit-box-align: center;
-webkit-align-items: center;
-moz-box-align: center;
-ms-flex-align: center;
align-items: center;
-webkit-box-pack: center;
-webkit-justify-content: center;
-moz-box-pack: center;
-ms-flex-pack: center;
justify-content: center;
height: 100%;
}
h1, h2, h3, h4, h5 {
text-align: center;
}
.note {
display: none;
}
p {
text-align: center;
}
pre { white-space:pre }