*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow-y: hidden;
}

canvas {
  display: block;
  margin: 10px auto;
  border: 1px dashed black;
  width: 100%;
  max-width: 480px;
  height: 70%;
}

.buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 100px;
}

button {
  display: block;
  width: 120px;
  height: 35px;
  border-radius: 15px;
  background-color: transparent;
  font-size: bold;
  font-size: 1rem;
}

#runButton {
  border: 2px solid red;
}
#pause {
  border: 2px solid blue;
}