message: feat: improve sequence view styling in dark mode
diff: }
  .sequence-view-body {
  + background-color: $gray-100;
  border-bottom: 0;
  padding: 0;
  margin: 0;
  }
  .sequence-view-background {
  - fill: $gray-100;
  + fill: transparent;
  }
  .sequence-view-label {
  