#ui-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 10;
      background-color: rgba(0, 10, 4, 0.75);
    }
    #panel{
      text-align: center;
    }
    #start-btn {
      font-family: sans-serif;
      padding: .25em .5em .25em .5em;
      border-radius: .5em;
      border: 2px solid #00ff55;
      font-size: 48px;
      background: #180000;
      color: #00ff55;
    }
    #start-btn:hover {
      background: #00ff55;
      color: #180000;
      border: 2px solid #180000;
    }
    p{
      font-size: 1.5em;
      font-weight: bold;
      font-family: sans-serif;
      background-color:  rgba(94, 128, 67, 0.75);
      padding: .5rem;
    }