:not(:defined) > * {
    display: none;
  }
  
  html {
    height: 100%;
  }
  
  body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
  }
  
  model-viewer {
    width: 100%;
    height: 90%;
    background-color: #ffffff;
  }
  
  
  .progress-bar {
    display: block;
    width: 33%;
    height: 10%;
    max-height: 2%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(-50%, -50%, 0);
    border-radius: 25px;
    box-shadow: 0px 3px 10px 3px rgba(0, 0, 0, 0.5), 0px 0px 5px 1px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.9);
    background-color: rgba(0, 0, 0, 0.5);
  }
  
  .progress-bar.hide {
    visibility: hidden;
    transition: visibility 0.3s;
  }
  
  .update-bar {
    background-color: rgba(255, 255, 255, 0.9);
    width: 0%;
    height: 100%;
    border-radius: 25px;
    float: left;
    transition: width 0.3s;
  }
  
  #ar-button {
    background-image: url(ar_icon.png);
    background-repeat: no-repeat;
    background-size: 20px 20px;
    background-position: 12px 50%;
    background-color: #fff;
    position: absolute;
    left: 50%;
    top: 2%;
    transform: translateX(-50%);
    white-space: nowrap;
    bottom: 16px;
    padding: 0px 16px 0px 40px;
    font-family: Roboto Regular, Helvetica Neue, sans-serif;
    font-size: 14px;
    color:#4285f4;
    height: 36px;
    line-height: 36px;
    border-radius: 18px;
    border: 1px solid #DADCE0;
  }
  
  #ar-button:active {
    background-color: #E8EAED;
  }
  
  #ar-button:focus {
    outline: none;
  }
  
  #ar-button:focus-visible {
    outline: 1px solid #4285f4;
  }
  
  @keyframes circle {
    from { transform: translateX(-50%) rotate(0deg) translateX(50px) rotate(0deg); }
    to   { transform: translateX(-50%) rotate(360deg) translateX(50px) rotate(-360deg); }
  }
  
  @keyframes elongate {
    from { transform: translateX(100px); }
    to   { transform: translateX(-100px); }
  }
  
  model-viewer > #ar-prompt {
    position: absolute;
    left: 50%;
    bottom: 60px;
    animation: elongate 2s infinite ease-in-out alternate;
    display: none;
  }
  
  model-viewer[ar-status="session-started"] > #ar-prompt {
    display: block;
  }
  
  model-viewer > #ar-prompt > img {
    animation: circle 4s linear infinite;
  }
  
  .card {
    background-color: #927f65;
    color: white;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }
  
  h2 {
    margin-top: 0;
    font-size: 24px;
  }
  
  ol {
    margin-top: 20px;
    margin-left: -40px;
  }
  
  li {
    font-size: 15px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
  }
  
  li img {
    margin-right: 20px;
    max-width: 50px;
    max-height: 50px;
  }