message: Bring back some of the Jest homepage changes for mobile
diff: margin-bottom: -20px;
  margin-right: -20px;
  }
  +
  +div.jest-repl {
  + margin: 0 5%;
  + position: relative;
  + width: 600px;
  +}
  +div.jest-repl iframe {
  + display: block;
  + margin: 0 auto 10px;
  + min-height: 420px;
  + width: 100%;
  +}
  +@media only screen and (min-device-width: 360px) and (max-device-width: 736px) {
  + div.jest-repl {
  + display: none;
  + }
  +}
  +@media only screen and (min-device-width: 768px) and (max-device-width: 1024px) {
  + div.jest-repl {
  + display: none;
  + }
  +}
  +@media only screen and (max-width: 1023px) {
  + div.jest-repl {
  + display: none;
  + }
  +}
  +
  +div.video {
  + margin: 0 5%;
  + position: relative;
  + width: 100%;
  + min-width: 300px;
  + max-width: 600px;
  +}
  +
  +div.video iframe {
  + display: block;
  + margin: 0 auto 10px;
  + min-height: 340px;
  + width: 100%;
  +}
  +
  +@media only screen and (min-device-width: 360px) and (max-device-width: 736px) {
  + div.video {
  + display: none;
  + }
  +}
  +@media only screen and (max-width: 1023px) {
  + div.video {
  + display: none;
  + }
  +}
  