body {
  margin: 0;
  padding: 0;
  /* Deep purple and blue galaxy background */
  background: #0b0d17 url('https://images.unsplash.com/photo-1464802686167-b939a6910659?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center fixed;
  background-size: cover;
  color: #a29bfe; /* Light purple text */
  font-family: 'Courier New', Courier, monospace;
  overflow: hidden;
  touch-action: none;
}

#game-container {
  width: 100vw;
  height: 100vh;
  position: relative;
}

#ufo, #alien, #explosion {
  position: absolute;
  font-size: 60px;
  user-select: none;
  pointer-events: none;
  /* Subtle glow effect for space vibe */
  filter: drop-shadow(0 0 10px rgba(162, 155, 254, 0.8));
}

#ufo {
  z-index: 10;
}

#alien {
  transition: all 0.7s ease-in-out;
  z-index: 5;
}

#explosion {
  display: none;
  z-index: 15;
  transform: scale(2.5);
}

#game-over {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(15, 10, 40, 0.9); /* Dark purple tint */
  padding: 40px;
  border: 3px solid #6c5ce7; /* Neon purple border */
  text-align: center;
  z-index: 100;
  box-shadow: 0 0 30px #6c5ce7;
  border-radius: 15px;
}

button {
  padding: 15px 30px;
  background: #6c5ce7;
  color: white;
  border: none;
  cursor: pointer;
  font-weight: bold;
  font-size: 18px;
  margin-top: 20px;
  border-radius: 5px;
  text-transform: uppercase;
}

button:hover {
  background: #a29bfe;
}