html, body {
  margin: 0;
  padding: 0;
}

canvas {
  display: block;
}

input {
  font-size: 20px;
  border-radius: 6px;
  border: 1px solid black;
  text-align: center;
  width: 120px;
  height: 40px;
}

button {
  border-radius: 6px;
  border: 1px solid black;
  background-color: rgb(122, 146, 79);
}