body{
    margin:0;
}
header {
    background-color: #d0dbd5;
    padding: 20px;
    text-align: center;
  
  }
  /* Style the top navigation bar */
  .topnav {
    overflow: hidden;
    background-color: #333;
  }
  
  /* Style the topnav links */
  .topnav a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
  }
  
  /* Change color on hover */
  .topnav a:hover {
    background-color: #ca4a6a;
    color: black;
  }
  /* Create three unequal columns that floats next to each other */
  .column {
    float: left;
    padding: 10px;
  }
  
  /* Left and right column */
  .column.side {
    width: 20%;
    background-color: #cc2020;
  }
  
  /* Middle column */
  .column.middle {
    width: 60%;
   background-color: #6563a8;
  }
  
  /* Clear floats after the columns */
  .row:after {
    content: "";
    display: table;
    clear: both;
  }
  
  /* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
  @media screen and (max-width: 600px) {
    .column.side, .column.middle {
      width: 100%;
    }
  }
  footer {
    background-color: #6eb8bb;
    padding: 15px;
    text-align: center;
  }
  
  button {
    border: none;
    color: black;
    padding: 15px 30px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    background-color: #a5204a
  }
  
  .button onclick{background-color: #be1515;} 
  .button onclick{background-color:#b61c1c;}