html { 
  position: relative;
  outline: 3px solid #5F9DC8;
  outline-offset: 5px;
}

html::before {
  content: "Zespół Zakupów";
  display: block;
  background-color: #5F9DC8;
  color: white;
  position: absolute;
  border-radius: 0 0 3px 3px;
  padding: 5px 10px;
  left: 10px;
  top: -5px;
}