#divContent > div {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  #divContent div {
    margin: 10px;
  }
  
  h1 {
    text-align: center;
  }
  
  button {
    display: inline-flex;
    margin: 5px;
  }
  
  #msgRed {
    color: red;
  }
  
  #msgBlue {
    color: blue;
  }