html {
  width: 25em;
}
body {
  margin: 0.20em;
}
a img {
  border: 0;
}
.header {
  border-bottom: 1px solid #92adef;
  margin-bottom: 0.5em;
}
.footer {
  border-top: 1px solid #92adef;
  margin-top: 0.5em;
  color: #BBBBBB;
  font-size: 70%;
  text-align: center;
}
.extensionTitle {
  font-size: 200%;
  font-weight: bold;
  color: #92adef;
}
#extensionVersion {
  font-size: 40%;
}
.extensionIcon {
  float: left; 
  width: 4em;
}
.donateButton {
  float: right;
  width: 5em;
}
.quote {
  font-size: 75%;
}
.quote .attribution {
  font-weight: bold;
  text-align: right;
}
.quote .publication {
  font-style: italic;
}
.warningBox {
  border: 1px solid #92adef;
  border-radius: 0.25em;
}
.warningBox:not(:first-of-type) {
  margin-top: 0.5em;
}
.warningBox:before {
  content: 'WARNING';
  display: block;
  text-align: center;
  background-color: yellow;
  border-bottom: 1px solid #92adef;
}