.witaj2{
    height:80vh;
    margin-top:20%;
    text-align:center;
    color:white;
     font-size:5vh;
    word-wrap:break-word;
    background: linear-gradient(
      rgba(0,0,0,0.5),
      rgba(0,0,0,0.5)
   )
  }
  .block3{
    background-color:#000000;
    background-image:url('../zdjecia/tlo4.jpg');
    background-position: center 45%;
    background-repeat: no-repeat;
    background-size:cover;
    
    
  }
  h1{
    font-size:50px;

  }
  h3{
    font-size:25px;
  }