display.css

h1, h2, form, body, canvas, div, button, input {
  margin: 0;
    border: 0;
    outline: 0;
    padding: 0;

    text-decoration: inherit;
    box-sizing: inherit;
    vertical-align: inherit;
    text-align: inherit;
    color: inherit;
    font: inherit;

    background: transparent;
}

body {
  position: absolute;

  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: black;
  font-family: 'Audiowide', cursive;
}

canvas {
  display: block;
  margin: auto auto;
  height: calc(100vh - 270px);
}

h1 {
  margin-top: 30px;
  color: DeepSkyBlue;
  text-align: center;
  font-size: 90px;
  letter-spacing: 5px;
}

button, input {
  border-radius: 5px;
  background-color: #ffffff;
}
button {
  padding: 5px 10px;
  cursor: pointer;
}

button.selected {
  background-color: #e14c14;
}

#control {
  position: fixed;
  bottom: 0;
  left: calc(50% - 500px);
  width: 930px;
  height: 80px;
  background-color: #3c3c3c;
  border-radius: 5px;
  padding: 20px 40px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.measures button {
  width: 30px;
  margin-top: 5px;
  font-size: 20px;
}

h2 {
  font-size: 30px;
}

.action {
  font-size: 40px;
  margin-right: 93px;
}

.action button {
  width: 155px;
  text-align: center;
}



.tempo input {
  font-size: 20px;
  width: 110px;
  padding: 5px 10px;
  margin-top: 5px;
}