/* Add a black background color to the top navigation */
.topnav {
    background-color: #333;
    overflow: hidden;
  }
  
  /* Style the links inside the navigation bar */
  .topnav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 10px 5px 5px 7px;
    text-decoration: none;
    font-size: 17px;
  }
  
  /* Change the color of links on hover */
  .topnav a:hover {
    background-color: #ddd;
    color: black;
  }
  
  /* Add a color to the active/current link */
  .topnav a.btn-active {
    background-color: black;
    color: white;
  }

  nav {
    box-sizing: border-box;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 20px 50px;
    text-align: center;
    background-color: #333;
    font-size: 18px;
    letter-spacing: 1px;
   }

   html { overflow-y: scroll; }

   button::-moz-focus-inner, input::-moz-focus-inner {
    border:0;
    padding:0
    }

    body {
        margin: 0; 
        padding: 0;
        background: #000;
        overflow: hidden; 
    }