body {
  margin: 0;
  font-family: 'Pixelify Sans', sans-serif;
  padding: 0;
  background: url('main_theme.png') no-repeat center center fixed;
  background-size: cover;
}

.container {
  text-align: center;
  padding-top: 100px;
  color: #1bdf6a;
}

.title {
  font-size: 4.5rem;
  margin-bottom: 40px;
  text-shadow: 1.5px 1.5px #000;
}

.button-group {
  border: none;
  margin-bottom: 30px;
}

.btn i {
  margin-right: 8px;
}

.button-group .btn {
  border: none;
  display: inline-block;
  margin: 10px;
  padding: 15px 30px;
  background-color: #65a6da;
  color: white;
  font-family: 'Pixelify Sans', sans-serif;
  text-decoration: none;
  font-size: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.button-group .btn:hover {
  background-color: #365e7e;
  transform: scale(1.05);
}

#toggleAudio {
  font-family: 'Pixelify Sans', sans-serif;
  margin-top: 20px;
  padding: 12px 25px;
  font-size: 1rem;
  background-color: #1bdf6a;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  color: white;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

#toggleAudio:hover {
  background-color: #129b49;
  transform: scale(1.05);
}

.hidden {
  display: none;
}

.top-controls {
  position: fixed;
  top: 15px;
  right: 20px;
  z-index: 1000;
}

#music-btn {
  font-size: 1.5rem;
  padding: 0.7rem;
  background-color: rgba(255, 255, 255, 0.8);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

#music-btn:hover {
  background-color: #dcdcdc;
  transform: scale(1.1);
}