body {
    position: relative;
    min-height: 100vh;
    margin: 0;
  }
  
  #overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1;
  }
  
  #panel {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    background-color: white;
    z-index: 2;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    font-size: 0.7em;
  }