    header {
           border: 1px solid white;
           position: relative;
           width: 97.5%;
           margin-top: 0px;
           height: 160px;
           margin-bottom: 10px;   
           background-color: lightgray;
           background: url(../../banner.png);
          }
   header nav ul {
          margin-top: 122px; 
          padding: 0px;
        }
   header nav li {
          display: inline;
          float: right;
        } 
   header nav a {
          font-family: Verdana, sans-serif;
          display: block; 
          width: 150px;
          font-weight: bold;
          background-color:#B9D7D9;
          text-align: center;
          padding: 10px;
          text-decoration: none;
          text-transform: uppercase;
          }
   header nav li a:hover {
        color: #000000;
          }
   header nav li a {color: red;
        }
   aside {
          background-color: #B9D7D9;
          border: 1px solid white;
          position: relative;
          float: left;
          margin-top: 10px;
          width: 20%;
          height: 400px;
          margin-bottom: 20px;
          }
    aside ul {
        list-style-type: none;
        position: relative;
        text-align: center;
        }
    aside ul li a {
        text-transform: uppercase;
        text-decoration: none;
        color: red;
        font-family: Verdana, sans-serif;
        font-weight: bold;
        padding: 5px;
        display: block;
      }
    aside ul li a:hover {
        color: #000000;
      }
    .contact p {
          text-align: center;
          position: relative;
          margin-top:100px;
          font-family: Verdana, sans-serif;
        }
    .content {
          border: 1px solid white;
          position: relative;
          float: right;
          margin-top: 10px;
          width: 79%;
          margin-bottom: 10px;
          font-family: Verdana, sans-serif;
          
          }
     

    footer {
          border: 1px solid white;
          position: relative;
          height: 50px;
          background-color: none;
          clear: both;
          font-family: Verdana, sans-serif;
          background-color: #F4EBC3;
          }
     
Add stylesheet for index page
Add stylesheet for index page
