.mycontainer {
    position: relative;
    width: 90%;
    margin: auto;
    border-radius: 6px;
    padding: 30px;
    margin-top:30px;
    background-color: rgb(204, 197, 232);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
  }
  
  table {
    border-collapse: collapse;
  }
  
  th, td {
    border: 1px solid black;
    text-align: center;
    height: 50px;
  }

  .topnav {
    overflow: hidden;
    background-color: #333;
  }
  
  .topnav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
  }
  
  .topnav a:hover {
    background-color: #ddd;
    color: black;
  }
  
  .topnav a.active {
    background-color: #04AA6D;
    color: white;
  }