* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
    scroll-behavior: smooth;
  }
  
nav {
    background-color: #333;
    overflow: hidden;
}
  
nav .btNav {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
    background: #333;
  }

button {
  cursor:pointer;
}

#console {
    text-align: center;
  }