:root {
  color-scheme: dark;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background: #0b1020;
}

body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: radial-gradient(circle at top, #1a2140, #0b1020 60%);
}

#game-container {
  width: min(960px, 95vw);
  height: min(600px, 95vh);
  border: 2px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.6);
}