body {
  font-family: "Segoe UI", sans-serif;
  background: linear-gradient(to right, #f8f9fa, #e9ecef);
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
#controles-adicionales {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

#controles-adicionales button {
  flex: 1 1 40%;
  max-width: 120px;
}

#reproductor-musica {
  background: white;
  padding: 30px 20px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  text-align: center;
  max-width: 400px;
  width: 90%;
}

h2 {
  margin-bottom: 20px;
  color: #333;
}

select {
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid #ccc;
  margin-bottom: 20px;
}

audio {
  width: 100%;
  margin-bottom: 20px;
}

button {
  background: #007bff;
  border: none;
  color: white;
  padding: 10px 14px;
  margin: 5px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #0056b3;
}

@media (max-width: 480px) {
  #reproductor-musica {
    padding: 20px 10px;
  }

  button {
    width: 48%;
    font-size: 0.85rem;
  }

  select {
    font-size: 0.9rem;
  }
}