discourse/app/assets/stylesheets/mobile/onebox.scss

a.loading-onebox {
  background: {
    image: image-url("spinner_96.gif");
    position: 0;
    size: 20px;
    height: 25px;
    repeat: no-repeat;
  };
  padding-left: 25px;
}

.onebox-result {
  font-size: 14px;
  > .source {
    margin-bottom: 10px;
    margin-right: 10px;
    padding: 10px 0;
    display: block;
    color: $primary_text_color;
    position: relative;
    border-bottom: 1px solid $primary_border_color;
    .info {
      a {
        color: $primary_text_color;
        text-decoration: none;
      }
      background-color: $primary_background_color;
      position: absolute;
      font-size: 14px;
      img.favicon {
        margin-right: 3px;
      }
    }
  }
  .onebox-result-body {
    padding-top: 5px;
    font-family: Georgia, Times, "Times New Roman", serif;
    img {
      max-width: 100px;
      max-height: 80%;
      float: left;
      margin-right: 10px;
    }
    h3, h4 {
      margin: 0 !important;
    }
    img.thumbnail {
      max-width: 25%;
      height: auto;
    }
    code {
      max-height: 400px;
    }
    .metrics {
      clear: both;
      padding-bottom: 25px;
      .metric {
        display: inline-block;
        padding-left: 33px;
        float: left;
      }
    }
  }
}

// RottenTomatoes Onebox
.onebox-result {
  .onebox-result-body {
    img.verdict {
      float: none;
      margin-right: 7px;
    }
    img.popcorn {
      float: none;
      margin-left: 20px;
      margin-right: 5px;
    }
  }
}