/* Base Styles (Desktop first) */
body {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  font-family: "Poppins", sans-serif;
  color: #fff;
  text-align: center;
}

/* Title */
h1 {
  font-size: 2.2rem;
  margin-bottom: 10px;
  background: linear-gradient(90deg, #ff6ec4, #7873f5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 12px rgba(255, 110, 196, 0.7), 0 0 24px rgba(120, 115, 245, 0.7);
  animation: glowText 2s infinite alternate;
}

/* Score */
#score {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: #4deeea;
  text-shadow: 0 0 8px #4deeea, 0 0 16px #4deeea;
}

/* Canvas */
canvas {
  width: 600px;
  max-width: 90vw;
  height: 400px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 16px;
  background: rgba(15, 15, 25, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 0 25px rgba(120, 115, 245, 0.6),
              0 0 50px rgba(77, 238, 234, 0.4);
  animation: pulse 3s infinite alternate;
}

/* Game Over Popup */
#game-over {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem;
  background: rgba(25, 25, 40, 0.9);
  backdrop-filter: blur(12px);
  padding: 25px 50px;
  border-radius: 14px;
  color: #fff;
  text-align: center;
  box-shadow: 0 0 30px rgba(120, 115, 245, 0.7);
  animation: fadeIn 1s forwards;
}

/* Restart Button */
#restart-btn {
  margin-top: 18px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: bold;
  background: linear-gradient(135deg, #4deeea, #7873f5);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  color: #fff;
  box-shadow: 0 0 15px rgba(120, 115, 245, 0.8), 
              0 0 25px rgba(77, 238, 234, 0.6);
  transition: 0.3s ease;
}

#restart-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(255, 110, 196, 0.9), 
              0 0 35px rgba(120, 115, 245, 0.9);
}

/* Animations */
@keyframes pulse {
  from { box-shadow: 0 0 15px rgba(120, 115, 245, 0.4); }
  to   { box-shadow: 0 0 40px rgba(77, 238, 234, 0.8); }
}

@keyframes glowText {
  from { text-shadow: 0 0 8px rgba(255, 110, 196, 0.7), 0 0 20px rgba(120, 115, 245, 0.7); }
  to   { text-shadow: 0 0 16px rgba(255, 110, 196, 1), 0 0 32px rgba(120, 115, 245, 1); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translate(-50%, -60%); }
  to   { opacity: 1; transform: translate(-50%, -50%); }
}

/* Mobile Responsive */
@media (max-width: 768px) {
  h1 { font-size: 1.7rem; }
  #score { font-size: 1.3rem; }
  canvas { height: 260px; }
  #game-over { font-size: 1.5rem; padding: 20px 30px; }
  #restart-btn { padding: 9px 22px; font-size: 0.9rem; }
}

@media (max-width: 480px) {
  h1 { font-size: 1.3rem; }
  #score { font-size: 1.1rem; }
  canvas { height: 200px; }
  #game-over { font-size: 1.2rem; padding: 12px 22px; }
  #restart-btn { padding: 7px 18px; font-size: 0.85rem; }
}