body, html {
    margin: 0;
    padding: 0;
    height: 100%;
  }
  
  .fondo {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('images/img3.jpg'); 
    background-size: cover;
    background-position: center;
    z-index: -1;
  }
   
  @media (max-width: 768px) {
    .fondo {
      background-size: contain;
    }
  }

  .logo {
    width: 200px;
    margin: 20px; 
     margin-left: 100px;
    float: left;
    }

  .text {
    width: 1050px;
    text-shadow: 2px 2px rgb(129, 31, 31);
    float: right;
    margin-top: 70px;
    margin-left: 30px;
    margin-right: 100px;
    font-weight: bold;
        font-size: 50px;  
      
  }