body {
  background: #222;
  color: #fff;
  text-align: center;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
h1 {
  margin-top: 30px;
}
#login {
  margin-top: 40px;
}
#login input {
  padding: 0.5rem;
  font-size: 1rem;
  margin: 0.2rem;
  border-radius: 4px;
  border: 1px solid #333;
}
#login button {
  padding: 0.5rem 1.2rem;
  font-size: 1rem;
  margin: 0.2rem;
  border-radius: 4px;
  border: none;
  background: #3cf;
  color: #fff;
  cursor: pointer;
}
#login-status, #game-status {
  margin-top: 1rem;
  font-size: 1.1rem;
  color: #ffeb3b;
}
#pong {
  background: #111;
  display: block;
  margin: 30px auto 0 auto;
  box-shadow: 0 4px 24px #000a;
  border-radius: 8px;
  border: 2px solid #3cf;
}