body {
  display: flex;
  flex-direction: column;
  background-color: DarkSeaGreen;
  color: DarkSlateGrey;
}

h1{
  text-align: center;
  margin-top: 0;
}

h3{
  text-align: center;
  margin: 0;
}

.main {
  display: flex;
  align-self: center;
  flex-direction: row;
  width: 90%;
  justify-content: center;
}

canvas {
  width: 100%;
  max-width: 600px;
}

button {
  flex-grow: 1;
  height: 4em;
  margin: 0 1% 0 1%;
  background-color: DarkSlateGrey;
  color: DarkSeaGreen;
  border-color: DarkSlateGrey;
}

select {
  background-color: DarkSlateGrey;
  color: DarkSeaGreen;
  height: 3em;
  width: 100%;
  max-width: 200px;
  align-self: center;
  text-align: center;
}

label {
  text-align: center;
  padding-right: 2em;
}