next.js/examples/cms-wordpress/src/components/Globals/PreviewNotice/PreviewNotice.module.css

.preview {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  margin: 0 auto;
  width: 280px;
  text-align: center;
  max-width: 100%;
  border-bottom-left-radius: 5px;
  border-bottom-right-radius: 5px;
  background-color: #000;
  color: #fff;
  padding: 5px 15px;
  display: flex;
  justify-content: space-between;
  white-space: nowrap;
}

.link {
  margin-left: 10px;
}