body {
    margin: 0;
    padding: 0;
}
  
  canvas {
    width: 100%;
    height: 100%;
  }
  
  .hide {
    display: none;
  }
  
  .controller {
    position: absolute;
    left: 10px;
    top: 10px;
    z-index: 1;
    background: #f1f1f1;
    border: 1px solid #ddd;
    padding: 10px;
    }

    ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    li {
        margin: 5px 0 8px;
    }
        
    button {
        display: block;
        width: 100%;
        padding: 5px 15px;
    }
    

    .active {
        background: #1d48f1;
        color: #fff;
    }  
  
  #btn_run_algorithm {
    display: block;
    margin-top: 15px;
    background: #009c31;
    color: #fff;
    padding: 10px 25px;
    font-size: 1.4rem;
  }
  
  #notification {
    position: fixed;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 25px;
    text-align: center;
    color: #fff;
    padding: 6px 25px 5px;
    bottom: 10px;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  
  label {
    display: block;
    font-size: 0.9rem;
  }
  
  input[type=range] {
    width: 100%;
  }