swagger-api/swagger-editor

.editor-readonly-watermark {
    position: absolute;
    top: 0;
    height: 40px;
    left: 0;
    right: 0;
    padding-right: 20px;
    padding-top: 10px;
    margin: 0;

    z-index: 2;
    color: #fff;
    font-weight: bold;
    text-align: right;
    user-select: none;
    pointer-events: none;

    &:before {
      z-index: 1;
      pointer-events: none;
      position: absolute;
      content: ' ';
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;

      background: linear-gradient(
        to right,
        rgba(255,255,255,0) 60%,
        rgba(145, 145, 145, 0.31) 74%,
        rgba(255, 255, 255, 0.17) 100%);

    }
  }