/**
 * Add background color.
 */
 body {
    background-color: rgb(173, 196, 230);
  }
  /**
   * Add color, margin and padding to h1.
   */
  h1 {
    color: rgb(7, 1, 41);
    margin-left: 10px;
    padding: 10px;
  }
  /**
   * Add color, margin and padding to h2.
   */
  h2 {
    color: darkslategray;
    padding: 10px;
  }
  /**
   * Add padding to left and right of paragraph.
   */
  p {
    padding-left: 5px;
    padding-right: 5px;
  }
  /**
   * Set width of body.
   */
  b {
    width: 725px;
  }
  /**
   * Add padding to list items.
   */
  ul {
    padding-left: 10px;
  }
  /**
   * Add border to image and position image.
   */
  image {
    border: 5px double dodgerblue;
    text-align: center;
  }
  /**
  *Add Fixed-width columns
  /**
  
  /**
* Add Navigation Menu
*/
#nav_menu ul{
  list-style-type: square ;
  padding: 1em 0;
  text-align: center;
  display: block;
  border-top: oldlace solid 2px;
  border-bottom: solid oldlace 2px;
}
#nav_menu ul li{
  display: inline;
  padding: 0 1.5em;  
}
#nav_menu ul li a{
  font-weight: bold;
  color: black;
}
#nav_menu ul li a.current {
  text-decoration: none;
}