body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background-color: #ffffff;
  }
h1 {
    text-align: center;
    font-size: 5em;
}
  
  .container {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .wrapper {
    display: flex;
    flex-direction: row;
    align-items: center;
  }
  
  #visualizer {
    width: 100%;
    height: 50%;
    background-color: #fff;
    border-bottom: 2px solid #ccc;
  }
  
  .controls {
    margin-top: 20px;
  }
  
  button {
    font-size: 2rem;
    padding: 50px 150px;
    margin: 0 10px;
    cursor: pointer;
  }