body {
  text-align: center;
  font-family: sans-serif;
  background-color: #f0f8ff;
  margin: 0;
  padding: 0;
}


#login-screen, #game-screen {
  margin-top: 40px;
}


canvas {
  border: 3px solid #000;
  background-color: #fff;
  margin-top: 20px;
}


input {
  padding: 10px;
  font-size: 16px;
  width: 250px;
}


button {
  padding: 10px 20px;
  font-size: 16px;
  margin-left: 10px;
  cursor: pointer;
}