.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: -2%;
    width: 100%;
    height: 102%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4);
    animation: fadeIn 0.3s;
  }
  
  @keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
  }
  .modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: none;
    width: 30%;
    text-align: center;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    border-radius: 10px;
  }
  .modal-content p {
    font-size: 24px;
    color: #000000;
    margin-bottom: 20px;
  }
  .modal-content .popButton {
    padding: 10px 20px;
    font-size: 24px;
    background-color: #3FBAD9;
    color: #000000;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  .modal-content .popButton:hover {
    background-color: #000000;
  }
  /* Position the button at the top-left corner */
  .howToPlayBtn {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 1;
  }
  
  /* Style the button to match the game theme */
  .howToPlayBtn {
    font-family: "Poppins", sans-serif; /* Use the same font as the game */
    font-size: 16px; /* Adjust the font size as needed */
    background-color: #ffffff; /* Use the same purple color as the game */
    color: #3FBAD9; /* Set the text color to white */
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    cursor: pointer;
    box-shadow: 5px 10px 10px rgba(0, 0, 0, 0.2); /* Add a subtle shadow */
    transition: background-color 0.3s ease; /* Add a transition effect */
  }
  
  /* Add a hover effect */
  .howToPlayBtn:hover {
    background-color: #c2b7b7; /* Slightly darker purple on hover */
  }

  .close {
    color: #3FBAD9;
    float: right;
    font-size: 24px;
    font-weight: bold;
  }
  
  .close:hover,
  .close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
  }
  









<button id="howToPlayBtn" class="howToPlayBtn">How to Play</button>
<div id="howToPlayModal" class="modal">
    <div class="modal-content">
        <span class="close">&times;</span>
        <h2>How to Play</h2>
        <p>Get to 10 correct answers keeping as many lives as you can</p>
        <iframe width="560" height="315" src="https://www.youtube.com/embed/waxXmW6k4g4?si=7z1c0IiEiEo4GAuw" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
    </div>
</div>










// Get the modal
var modal = document.getElementById("howToPlayModal");

// Get the "How to Play" button
var howToPlayBtn = document.getElementById("howToPlayBtn");

// Get the close button
var closeBtn = document.getElementsByClassName("close")[0];

// When the user clicks the "How to Play" button, open the modal
howToPlayBtn.onclick = function() {
  modal.style.display = "block";
}

// When the user clicks the close button, close the modal
closeBtn.onclick = function() {
  modal.style.display = "none";
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
  if (event.target == modal) {
    modal.style.display = "none";
  }
}