* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Arial', sans-serif;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background-color: black;
}

.screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  height: 100vh;
  z-index: 2; /* Ensure the start screen is above everything */
}

h1 {
  font-size: 4rem;
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
  font-family: 'Varela Round';
}

h2, h3 {
  color: white;
  margin-bottom: 20px;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.81);
  font-family: 'Varela Round';
}

p {
  margin-bottom: 100px;
  font-family: 'Varela Round';
}

button {
  font-family: 'Varela Round';
  padding: 15px 30px;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 20px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #2980b9;
}

.hidden {
  display: none;
}

#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: black; /* Set background color */
}

.grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(white 1px, transparent 1px),
                    linear-gradient(90deg, white 1px, transparent 1px);
  background-size: 30px 30px; /* Adjust size as needed */
  opacity: 0.5;
  z-index: 1;
  pointer-events: none;
  box-shadow: 0 0 20px white;
}

.game {
  position: relative;
  width: 100%;
  height: 100%;
}

.player {
  position: absolute;
  width: 10vw; /* Adjust for responsive sizing */
  height: 10vw; /* Adjust for responsive sizing */
  max-width: 50px; /* Ensure it doesn't get too big */
  max-height: 50px; /* Ensure it doesn't get too big */
  background-color: white; /* Player color changed to white */
  border-radius: 50%;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.8); /* Adjusted shadow for visibility */
}

.obstacle {
  position: absolute;
  top: 0;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

.floating-obstacles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none; /* Prevent interaction */
}

.floating-obstacle {
  position: absolute;
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
  animation: float 5s infinite alternate;
}

@keyframes float {
  0% { transform: translateY(0); }
  100% { transform: translateY(-10px); }
}

.score-board {
  position: absolute;
  top: 10px;
  left: 20px;
  color: white;
  font-size: 24px;
}

/* Add glowing effect to player and obstacles */
.player, .obstacle {
  border: 3px solid white;
}

/* Responsive design for mobile screens */
@media (max-width: 768px) {
  h1 {
    font-size: 3rem;
  }

  button {
    font-size: 18px;
    padding: 12px 24px;
  }

  .score-board {
    font-size: 20px;
  }
}