body {
  text-align: center;
  background-color: #d3d3d3;
}

h1 {
  color: #333;
  font-size: 3em; /* Increase font size */
  font-weight: bold; /* Make the text bold */
  text-transform: uppercase; /* Uppercase letters */
  letter-spacing: 5px; /* Add letter spacing */
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2); /* Add text shadow */
  margin: 20px 0; /* Add some margin */
}

#gameContainer {
  margin-top: 50px;
  position: relative;
  border-radius: 20px; /* Add border radius */
}

#score,
#highScore,
#timer {
  font-size: 20px;
  color: #333;
  margin-bottom: 10px;
}

#bubbles {
  position: relative;
  width: 600px;
  height: 400px;
  margin: 0 auto;
  background-color: #ccc;
  border: 2px solid #333;
  border-radius: 10px;
  overflow: hidden;
}

.bubble {
  position: absolute;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: #f00;
  cursor: pointer;
  transition: top 0.5s ease-in-out, left 0.5s ease-in-out;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3); /* Add box shadow */
}

.bubble:hover {
  background-color: #f00;
  transform: scale(1.2);
  transform: scale(1.2);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5); /* Increase shadow on hover */
  transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out; /* Add transition */
}

#scoreValue,
#highScoreValue {
  font-weight: bold;
}

#timerValue {
  font-weight: bold;
  animation: blink 1s infinite;
}

.start-button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #333;
  color: #fff;
  border: none;
  cursor: pointer;
  margin-top: 20px;
  transition: transform 0.2s ease-in-out; /* Add transition */
}
.start-button:hover {
  transform: scale(1.1); /* Scale up on hover */
}

#countdown-alert {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  background-color: red;
  color: white;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 1.2em;
  display: none;
  z-index: 1000; /* Ensure it's on top */
}

@keyframes countdown {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}

@media (max-width: 768px) {
  #bubbles {
    width: 80%;
    height: 300px;
  }
}