/* Navbar container */
  tr {
    border-style:solid;
  }

  td {
    border-style:solid;
    border-color:black;
  }

  th {
    border-style:solid;
  }

  table {
    border-style:dashed;
    border-color:white;
  }

  body {
    background-image:linear-gradient(black, grey);
    background-size: cover;
    text-align:center;
  }

  .nav_container {
    /*margin-left: 25vw;*/
  }

  .navbar {
  margin-left:25vw;
  margin-right:25vw;
  float: none;
  overflow: hidden;
  background-color: #333;
  text-align: center;
  font-family: Arial;
  display: flex;
  justify-content: center;
  }

/* Links inside the navbar */
  .navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  margin-left: 25vw;
  padding: 14px 16px;
  text-decoration: none;
  }

/* The dropdown container */
  .dropdown {
  float: left;
  overflow: hidden;
  }

/* Dropdown button */
  .dropdown .dropbtn {
  text-align: center;
  font-size: 16px;
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit; /* Important for vertical align on mobile phones */
  margin: 0 auto; /* Important for vertical align on mobile phones */
  }

/* Add a red background color to navbar links on hover */
  .navbar a:hover, .dropdown:hover .dropbtn {
  background-color: red;
  }

/* Dropdown content (hidden by default) */
  .dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
  }

/* Links inside the dropdown */
  .dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
  }

/* Add a grey background color to dropdown links on hover */
  .dropdown-content a:hover {
  background-color: #ddd;
  }

/* Show the dropdown menu on hover */
  .dropdown:hover .dropdown-content {
  display: block;
  }