body {
  font-family: verdana, Helvetica, sans-serif;
}

h1, h2, h3 {
  font-family: "Helvetica Neue", Helvetica, verdana, arial, sans-serif;
}

div.experiment {
  font-family: verdana, "Helvetica Neue", Helvetica, arial, sans-serif;
}

div#footer {
  font-family: verdana, "Helvetica Neue", Helvetica, arial, sans-serif;
}