message: Add error style in question-text.html
diff: }
  .sv-question__title-container{
  background-color:rgba(26, 179, 148, 0.2);
  + box-sizing: border-box;
  max-width: 498px;
  margin: 0.5em 0;
  padding-left: 0.5em;
  font-size: 1em;
  font-family: inherit;
  height: calc(2em + 1px);
  - max-width: 498px;
  + width: 100%;
  + max-width: 422px;
  padding-left: 1em;
  - width: calc(100% - 1em);
  }
  .sv-question__text--error {
  + color: $error-color;
  border-color: $error-color;
  }
  +.sv-question__text:focus {
  + border-color: $main-color;
  + outline: unset;
  +}
  .sv-question__content {
  padding-left: 27px;
  }
  