/* background behind canvas */
body {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 100vh;
  background-color: black;
  color: white;
  font-family: "Arial", sans-serif;
}

/* page title */
h1 {
  margin-top: 20px;
  margin-bottom: 20px;
  font-size: 36px;
  color: yellow;
  text-shadow: 2px 2px 5px #000;
}

/* game canvas */
canvas {
  border: 4px solid blue;
  background-color: black;
  display: block;
  margin-bottom: 20px;
}

/* score and messages */
canvas + * {
  color: white;
  font-size: 24px;
  text-align: center;
}