body {
    background-image: url(imgs/stars.webm);
    padding: 0;
    margin: 0;
  }

 /*   #stars-background {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 100%;
  } */

  #stars-background {
    object-fit: cover;
    width: 100vw;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
  }

  @font-face {
    font-family: gabato;
    src: url(gabato/Gabato.ttf);
  }

  .titleheading {
    position: relative;
    justify-content: center;
    color: white;
    font-family: gabato;
    font-size: 70px;
    text-align: center;

    animation: color-change 2s infinite;
  }

  @keyframes color-change {
    0% { color: yellow; }
    25% { color: rgb(230, 0, 255); }
    50% { color: rgb(255, 0, 0); }
    75% { color: rgb(55, 0, 255); }
    100% { color: yellow; }
  }

   .container {
    position: relative;
    justify-content: center;
    width: 100%;
    height: 100%;
    margin-top: 15%;
    display: flex;
    align-items: center;
  }


  .btn{
    padding: 10px 15px;
    cursor: pointer;
    font-size: 22px;
    border-radius: 10px;
    font-family: consolas;
    font-weight: bold;
    align-items: center; 
   }

  .popup-title {
    color: white;
    font-family: consolas;
    font-size: 23px;
    font-weight: uppercase;
    text-align: center;
    text-transform: uppercase;
    margin-top: 20px;
  }

  .popup-sticky {
    position: -webkit-sticky;
    position: sticky;
    top: 20px;
  }

  .instruction-text {
    color: rgb(0, 0, 0);
    font-size: 18px;
    font-family: consolas;
    text-align: left;
    margin-top: 30px;
  }

  .ok-button {
    padding: 5px 50px;
    outline: 3px;
    cursor: pointer;
    font-size: 22px;
    border-radius: 5px;
    font-family: consolas;
    font-weight: bold;
    margin-top: 0px;
  }
  .popup {
    width: 500px;
    height: 314px;
    border-radius: 5px;  /* border radius of the pupup window */
    position: absolute;
    align-items: center;
    left: 50%;
    top: 0%;

    transform: translate(-50%, -50%) scale(0.1);
    text-align: center;
    padding: 0px 30px 30px; 
    background-image: url(imgs/popup\ ver\ 1.png);
    visibility: hidden;   /* popup hidden while not showing instructions */
    transition: transform 0.4s, center 0.4s;
    overflow-y: scroll; /*scrollbar*/
  }

    ::-webkit-scrollbar { /* hides scrollbar */
      width: 0px;
      background: transparent;
  }  

  .openPopup { /*pop up window with*/
    visibility: visible;
    top: 50%;
    transform: translate(-50%, -50%) scale(1);
  }