body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #e0e0e0;
  font-family: "Poppins", sans-serif;
  margin: 0;
  padding: 15px;
  box-sizing: border-box;
  color: #333;
  overflow-x: hidden;
}

h1 {
  margin-bottom: 15px;
  color: #2c3e50;
  font-weight: 600;
  text-align: center;
}

#ui {
  display: flex;
  gap: 30px;
  margin-bottom: 20px;
  font-size: 1.2em;
  color: #555;
  font-weight: 600;
  background-color: #ffffff;
  padding: 10px 25px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  flex-wrap: wrap;
  justify-content: center;
}

#ui p {
  margin: 5px 0;
}

#ui span {
  color: #e74c3c;
}

canvas#gameCanvas {
  background-color: #f0f0f0;
  border: none;
  display: block;
  border-radius: 15px;
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
  touch-action: none;
  width: 100%;
  max-width: 540px;
  height: auto;
  aspect-ratio: 1 / 1;
  margin-left: auto;
  margin-right: auto;
}

#gameOver {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(44, 62, 80, 0.9);
  color: white;
  padding: 30px 40px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  z-index: 10;
  width: 80%;
  max-width: 400px;
}

#gameOver:not(.hidden) {
}

#gameOver h2 {
  margin-top: 0;
  margin-bottom: 15px;
  color: #ecf0f1;
  font-size: 2em;
  font-weight: 600;
}

#gameOver p {
  margin-bottom: 20px;
  font-size: 1.2em;
  color: #bdc3c7;
}

#gameOver span {
  color: #f1c40f;
  font-weight: 600;
}

#restartButton {
  padding: 12px 25px;
  font-size: 1em;
  font-weight: 600;
  font-family: "Poppins", sans-serif;
  cursor: pointer;
  background-color: #2ecc71;
  color: white;
  border: none;
  border-radius: 8px;
  transition: background-color 0.3s ease, transform 0.1s ease;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

#restartButton:hover {
  background-color: #27ae60;
  transform: translateY(-2px);
}

#restartButton:active {
  transform: translateY(0);
}

.hidden {
  display: none;
}

@media (max-width: 600px) {
  h1 {
    font-size: 1.8em;
  }
  #ui {
    font-size: 1em;
    padding: 8px 15px;
    gap: 15px;
  }
  #gameOver h2 {
    font-size: 1.8em;
  }
  #gameOver p {
    font-size: 1.1em;
  }
  #restartButton {
    padding: 10px 20px;
    font-size: 0.9em;
  }
}