@media (max-width:820px){
  .content {
    background-image: url('../img/banner-2.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
  }
  header {
    display: none;
  }
  form {
    background:rgb(0, 0, 0, .4);
    border-radius: 15px;
    box-shadow: black 0px 0px 2px;
    padding: 15px;
    margin: auto;
    width: 80%;
  }
  .shadow {
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);  
  }
  }
  

@media (max-width:650px){
  .content {
    background-image: url('../img/angel-responsive.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
  }
  header {
    display: none;
  }
  form {
    background:rgb(0, 0, 0, .4);
    border-radius: 15px;
    box-shadow: black 0px 0px 2px;
    padding: 15px;
    margin: auto;
    width: 80%;
  }
  .shadow {
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);  
  }
  }