body {
  font-family: Arial, Helvetica, sans-serif;
}
img {
  max-width: 100%;
  height: auto;
}
@media print {
  .noprint {
    display: none;
  }
}
.hide {
  display: none;
}
.centered {
  margin: auto;
  text-align: center;
}
.videodiv {
  margin: auto;
  max-width: 480px;
}
.ratio-4-3 {
  margin: auto;
  position: relative;
  padding: 75% 0 0 0;
}
.ratio-3-2 {
  margin: auto;
  position: relative;
  padding: 66.667% 0 0 0;
}
.ratio-16-9 {
  margin: auto;
  position: relative;
  padding: 56.25% 0 0 0;
}