body {
  margin: 0;
  background-color: #000;
  color: #0f0; /* Neon green for text */
  font-family: 'Courier New', Courier, monospace; /* Retro font */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh; /* Ensure full viewport height */
  overflow: hidden;
}

#game-container {
  width: 800px;
  height: 600px;
  background-color: #080815; /* Dark space blue */
  border: 2px solid #0f0;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 20px #0f0;
  margin: 20px 0; /* Add some top/bottom margin */
}

#starfield {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden; /* Crucial for parallax */
}

.star {
  position: absolute;
  background-color: #fff;
  border-radius: 50%;
  box-shadow: 0 0 5px #fff;
}

#spaceship {
  width: 30px;
  height: 40px;
  position: absolute;
  /* A simple triangle shape for the spaceship body */
  background-color: transparent;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
  border-bottom: 40px solid #00f0ff; /* Neon cyan */
  filter: drop-shadow(0 0 3px #00f0ff);
  transition: transform 0.1s linear; /* For rotation */
  transform-origin: center center;
}

#propellant {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  /* Initially hidden, JS will show and adjust height */
  border-bottom: 0px solid #ff8c00; /* Orange flame */
  position: absolute;
  bottom: -20px; /* Positioned at the base of the spaceship */
  left: 50%;
  transform: translateX(-50%);
  filter: drop-shadow(0 0 5px #ff8c00);
  transition: border-bottom-width 0.1s ease-out, border-bottom-color 0.1s;
}

.asteroid {
  position: absolute;
  background-color: #8B4513; /* Brownish */
  border: 1px solid #A0522D; /* Sienna border */
  border-radius: 20%; /* Slightly irregular shape */
  box-shadow: inset 0 0 10px #502000;
  transition: transform 0.1s linear; /* For smooth movement */
}

.fragment {
  position: absolute;
  background-color: #A0522D; /* Lighter brown for fragments */
  border: 1px solid #8B4513;
  border-radius: 30%;
  box-shadow: inset 0 0 5px #502000;
  transition: transform 0.1s linear;
}

.laser-beam {
  position: absolute;
  width: 4px;
  height: 20px;
  background-color: #ff00ff; /* Magenta laser */
  box-shadow: 0 0 10px #ff00ff;
  border-radius: 2px;
}

#ui-container {
  display: flex;
  justify-content: space-around;
  width: 800px;
  padding: 10px 0;
  background-color: #111;
  border-left: 2px solid #0f0;
  border-right: 2px solid #0f0;
  border-bottom: 2px solid #0f0;
  box-shadow: 0 5px 15px #0f0;
  margin-bottom: 20px;
}

.ui-panel {
  display: flex;
  align-items: center;
  gap: 10px;
}

#laser-cooldown-container {
  width: 100px;
  height: 15px;
  background-color: #333;
  border: 1px solid #0f0;
  border-radius: 3px;
  overflow: hidden;
}

#laser-cooldown-bar {
  width: 100%; /* Full at start */
  height: 100%;
  background-color: #00f0ff; /* Neon cyan, like spaceship */
  transition: width 0.1s linear;
}

#hyperspace-button {
  background-color: #333;
  color: #0f0;
  border: 1px solid #0f0;
  padding: 5px 10px;
  cursor: pointer;
  font-family: 'Courier New', Courier, monospace;
}
#hyperspace-button:hover {
  background-color: #0f0;
  color: #000;
}
#hyperspace-button:disabled {
  background-color: #222;
  color: #555;
  border-color: #555;
  cursor: not-allowed;
}


#game-over-screen {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.85);
  padding: 40px;
  border: 2px solid #ff0000; /* Red for game over */
  box-shadow: 0 0 20px #ff0000;
  text-align: center;
  z-index: 100;
}

#game-over-screen h1 {
  color: #ff0000;
  margin-top: 0;
}

#game-over-screen p {
  font-size: 1.2em;
}

#restart-button {
  padding: 10px 20px;
  font-size: 1em;
  background-color: #0f0;
  color: #000;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  margin-top: 20px;
  font-family: 'Courier New', Courier, monospace;
}

#restart-button:hover {
  background-color: #fff;
}

.hidden {
  display: none !important;
}

/* --- Media Query for Mobile Devices --- */
@media (max-width: 768px) {
  body {
      padding: 10px; /* Add some padding around the content */
  }

  #game-container {
      width: 95%; /* Make game container take up more screen width */
      height: auto; /* Adjust height automatically based on width */
      aspect-ratio: 800 / 600; /* Maintain aspect ratio */
      margin: 10px 0;
      border: 1px solid #0f0; /* Slightly thinner border on mobile */
      box-shadow: 0 0 10px #0f0; /* Slightly smaller shadow */
  }

  #ui-container {
      width: 95%;
      padding: 5px 0;
      margin-bottom: 10px;
      border-left: 1px solid #0f0;
      border-right: 1px solid #0f0;
      border-bottom: 1px solid #0f0;
      box-shadow: 0 2px 5px #0f0;
      flex-direction: column; /* Stack UI panels on smaller screens */
      align-items: center;
      gap: 5px;
  }

  .ui-panel {
      font-size: 0.9em; /* Slightly smaller font on mobile */
      padding: 5px;
      width: 80%; /* Make UI panels wider */
      justify-content: space-between; /* Distribute elements within panel */
  }

  #laser-cooldown-container {
      width: 80px; /* Slightly smaller cooldown bar */
      height: 10px;
  }

  #hyperspace-button {
      padding: 3px 8px;
      font-size: 0.8em;
  }

  #spaceship {
      width: 20px;
      height: 27px;
      border-left: 10px solid transparent;
      border-right: 10px solid transparent;
      border-bottom: 27px solid #00f0ff;
  }

  #propellant {
      border-left: 3px solid transparent;
      border-right: 3px solid transparent;
      bottom: -13px;
  }

  .asteroid {
      border-radius: 15%; /* Adjust border-radius for smaller size */
  }

  .fragment {
      border-radius: 20%; /* Adjust border-radius for smaller size */
  }

  #game-over-screen {
      padding: 20px;
      border: 1px solid #ff0000;
      box-shadow: 0 0 10px #ff0000;
  }

  #game-over-screen h1 {
      font-size: 1.5em;
  }

  #game-over-screen p {
      font-size: 1em;
  }

  #restart-button {
      padding: 8px 15px;
      font-size: 0.9em;
      margin-top: 15px;
  }
}