discourse/app/assets/stylesheets/desktop/history.scss

// styles that apply to the popup that appears when you show the edit history of a post

.modal.history-modal {

  .modal-inner-container {
    min-height: 500px;
    max-width: 960px;
  }
  #revision-controls {
    .btn[disabled] {
      cursor: not-allowed;
      background-color: $primary-low; 
    }
    .btn-danger[disabled] {
      background-color: $danger-medium;
    }
  }
  #display-modes {
    text-align: right;
    display: inline-block;
    float: right;

    .btn {
      background-color:inherit;
      color: blend-primary-secondary(50%);
    }
    .btn-primary {
      color: $primary;
      font-weight: bold;
    }
  }

  #revisions {
    word-wrap: break-word;
    table {
      margin-top: 10px;
    }
  }
  img {
    max-width: 670px;
    height: auto;
  }
  .inline-diff {
    width: 670px;
  }
  .markdown {
    font-family: monospace;
    font-size: $font-down-1;
    width: 100%;
    border-collapse: collapse;
    border-spacing: 0;
    td {
      width: 50%;
      vertical-align: top;
      max-width: 440px;
      word-wrap: break-word;
      white-space: pre-wrap;
    }
  }
  .revision-content, .markdown {
    img {
      max-width: 100%;
      box-sizing: border-box;
    }
  }
  .modal-header {
    height: 42px;
  }
}