body {
  text-align: center;
  background: radial-gradient(circle at top, #021b3a, #010a1a);
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/*Game title */
#level-title {
  font-family: 'Press Start 2P', cursive;
  font-size: 2.8rem;
  margin: 40px 0;
  color: #fef2bf;
  text-shadow: 0 0 12px rgba(254, 242, 191, 0.4);
}

/*Container */
.container {
  width: 520px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin: auto;
}

/*Buttons */
.btn {
  height: 220px;
  width: 220px;
  border-radius: 18%;
  border: 8px solid rgba(0, 0, 0, 0.6);
  cursor: pointer;
  transition: 
    transform 0.08s ease,
    box-shadow 0.08s ease,
    filter 0.08s ease;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.25),
              0 10px 25px rgba(0,0,0,0.4);
}

/*Hover effect */
.btn:hover {
  filter: brightness(1.08);
}

/*pressed animation */
.pressed {
  transform: scale(0.95);
  box-shadow: 0 0 25px rgba(255, 255, 255, 0.8);
  filter: brightness(1.3);
}

/*Game over effect */
.game-over {
  background: radial-gradient(circle, #a80000, #400000);
  animation: shake 0.25s;
}

/*Shake animation */
@keyframes shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-6px); }
  100% { transform: translateX(0); }
}

/*Button colors*/
.red {
  background: linear-gradient(145deg, #ff4b4b, #c40000);
}

.green {
  background: linear-gradient(145deg, #3cff7a, #008a3b);
}

.blue {
  background: linear-gradient(145deg, #4b9bff, #003f8a);
}

.yellow {
  background: linear-gradient(145deg, #ffe066, #c9a400);
}

/* Footer (optional, if you keep it) */
footer {
  margin-top: 20px;
  padding-bottom: 10px;
  font-family: monospace;
  color: rgba(255,255,255,0.6);
}