style.css

/*
CSS por Letícia Mayni
*/

html, body {
  margin: 0;
  padding: 0;
}
canvas {
  display: block;
}

/*
.radiobutton {
  background-color: blue; 
  height: 50px;
  border: 5px solid black;
}
*/

#button {
  width: 100%;
  height: 10px;
  margin: auto;
  display: flex;
  
  justifplay_ent: center;
  align-items: center;
  position: absolute;
  background-color: #ccc
}

body main .control-painel {
    display: flex;
    width: 80%;    
    justify-content: space-between;
    padding: 25px;
    border: solid 1px;
    border-radius: 10px;
    margin: 10px;
}

body main .sequencer-painel {
  display: flex;
  width: 100%;
  justify-content: center;
  align-items: center;
  margin: 10px;
}

.sequencer-painel .sequencer-faixa1 {
  padding: 25px;
  border: solid 1px;
  border-radius: 10px;
}

.sequencer-painel .sequencer-faixa2 {
  padding: 25px;
  border: solid 1px;
  border-radius: 10px;
}