.background-1, .background-2, .background-3, .section-headline,{
  grid-row: 1/2;
}

.background-3, .image_1{
  grid-column: 3/4;
}
.background-1 {
    grid-column: 1/2;
    grid-row:1/7;
    background-color: white;
  }

  .background-2 {
    grid-column: 2/3;
    grid-row:1/7;
    background-color: whitesmoke;
  }

  .background-3{
    grid-column: 3/4;
    grid-row:1/7;
    background-color: lightgrey;
  }

  .section-headline{
    margin-top: 7%;
    grid-column: 1/3;
    grid-row: 1/2;
  }

  .section-content{
    grid-row: 2/5;
    grid-column: 1/3;
    margin:5%;
    align-self: flex-start;
  }

  .image_1{
    grid-column: 3/4;
    grid-row: 2/5;
    background-image: url(../img/Ralf_Business.jpg);
    background-size: cover;
    background-position: top center;
    background-color: beige;
  }

  @media(max-width:420px) {
    .image_1{grid-column: 1/4; grid-row: 4/7;}
    .section-content{grid-column: 1/4;}

  }