body{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: #ffc63f;
  }
  .title{
    font-size: 36px;
    margin-top: 10px;
    margin-bottom: 0px;
    padding: 0;
    color: #141c3a;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-align: center;
  }
  #demo{
    text-align: center;
    font-size: 18px;
    margin-top: 15px;
    color: #141c3a;
    letter-spacing: 1px;
    font-style: italic;
  }
  .piano{
    width: 305px;
    height: 210px;
    display: block;
    margin: 0 auto;
    background-color: #fd4d3f;
    margin-top: 30px;
  }
  .key{
    width: 30px;
    height: 200px;
    display: inline-block;
    border: solid #141c3a 2px;
    box-shadow: 2px 5px;
    background-color: white;
    color: #141c3a;
  }
  .black-key{
    width: 25px;
    height: 100px;
    display: inline-block;
    background-color: #141c3a;
    color: white;
    position: absolute;
    margin-left: -12px;
    padding: 0px;
  }
  .keynote{
    width: 20px;
    height: 20px;
    text-align: center;
    display: block;
    margin: 0 auto;
    margin-top: 175px;
    color: #141c3a;
  }
  .black-keynote{
    width: 20px;
    height: 20px;
    text-align: center;
    display: block;
    margin: 0 auto;
    margin-top: 75px;
  }
  #lyrics{
    width: 400px;
    height: 240px;
    display: block;
    margin: 0 auto;
    padding-left: 20px;
    margin-top: 50px;
    background-color: #fd4d3f;
  }
  #column-one, #column-two, #column-three, #column-four, #column-five, #column-six, #column-optional{
    width: 90px;
    display: inline-block;
    text-align: center;
    margin-top: 30px;
  }
  #column-optional{
    display: none;
  }
  #word-one, #word-two, #word-three, #word-four, #word-five, #word-six, #word-optional{
    background-color: white;
    width: 90px;
    height: 25px;
    padding-top: 10px;
    letter-spacing: 5px;
    color: #141c3a;
  }
  #letter-note-one, #letter-note-two, #letter-note-three, #letter-note-four, #letter-note-five, #letter-note-six, #letter-note-optional{
    color: white;
    width: 25px;
    height: 25px;
    margin-top: 15px;
    margin-left: 35px;
  }
  #first-next-line, #second-next-line, #third-next-line, #fourth-next-line{
    width: 80px;
    height: 40px;
    font-size: 16px;
    position: absolute;
    margin-top: 30px;
    margin-left: 10px;
    border: none;
    background-color: #ffc63f;
    color: #141c3a;
    letter-spacing: 1px;
    cursor: pointer;
  }