body
{
    background-color: rgb(160, 194, 214);
}

.header {
    position: sticky;
    top: 0;
    padding: 10px 16px;
    background: #6162ad;
    color: #f1f1f1;
  }

.main_nav {
    background-color: #333;
    overflow: hidden;
  }
  
  /* Style the links inside the navigation bar */
  .main_nav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
  }
  
  /* Change the color of links on hover */
  .main_nav a:hover {
    background-color: #ddd;
    color: black;
  }
  
  /* Add a color to the active/current link */
  .main_nav a.active {
    background-color: #04AA6D;
    color: white;
  }