404.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>METAVERSE | 404 Page Not Found</title>
  <style>
    body {
      margin: 0;
      padding: 0;
      font-family: sans-serif;
    }
    .container {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: 100vh;
      width: 100vw;
    }
    .box {
      position: fixed;
      top: 75vh;
      background-color: rgba(255, 255, 255, 0.557);
      border-radius: 10px;
      padding: 10px;
      margin: 10px;
      text-align: center;
    }
    a#back_Home_btn {
      color: black;
      text-decoration: none;
      background-color: rgba(255, 255, 255, 0.797);
      border-radius: 16px;
      padding: 5px;
      margin: 5px;
    }
    a#back_Home_btn:hover {
      background-color: #4097FF;
    }
    .background {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
    }
    .mobile-background {
      display: none;
    }

    @media screen and (max-width: 768px) {
      /* for width smaller than 768px */
      body {
        background-color: #023c7f;
      }
      .background {
        display: none;
      }
      .box {
        position: static;
        background-color: #67abff;
        font-size: .9rem;
      }
      p#credits {
        display: none;
      }
      .mobile-background {
        display: block;
        width: 80vw;
      }
    }
  </style>
</head>
<body>
  <div class="container">
    <!-- spline component background, hidden on mobile screens -->
    <div class="background">
      <script type="module" src="https://unpkg.com/@splinetool/viewer@1.9.54/build/spline-viewer.js"></script>
      <spline-viewer url="https://prod.spline.design/FF4zUicpD61VIS7e/scene.splinecode"></spline-viewer>
    </div>
    <!-- mobile screen background with 404 svg, hidden on desktop screens -->
    <div class="mobile-background">
      <img src="./assets/svgs/pageNotFound.svg" alt="page not found 404 error image">
    </div>
    <!-- overlay box with not found message, back home link and credit to 3D model creator on (desktop only) -->
    <div class="box">
      <p>Oops! The page you're looking for doesn't exist.</p>
      <p>Let's get you back <a id="back_Home_btn" href="https://apu52.github.io/METAVERSE">Home 🏠</a>.</p>
      <p id="credits">Background Model by <a href="https://app.spline.design/community/file/588a033c-a14b-4e70-a1de-793158fb2b17">Mohit. N</a></p>
    </div>
  </div>
</body>
</html>