 .container {
      font-size: 50px;
      position: absolute;
      left: 1em;
      top: 1em;
      padding: 5px;
      background: green;
      width: 4em;
      height: 8em;
  }
  mo {
      color: green;
      background: red;
  }
  .frame {
      position: absolute;
      box-sizing: border-box;
      border: 2px solid green;
  }
  @font-face {
    font-family: stretchy;
    src: url("/fonts/math/stretchy.woff");
  }
  @font-face {
    font-family: stretchy-centered-on-baseline;
    src: url("/fonts/m