body {
  margin: 0;
  padding: 0;
  background-color: #121212;
  color: white;
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  text-align: center;
}

.container {
  max-width: 90%;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.coin {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  font-size: 2.5rem;
  margin: 20px auto;
  background-color: #333;
  transition: background-color 0.5s, transform 0.5s;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

.buttons {
  margin: 20px 0;
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

button {
  padding: 12px 20px;
  background-color: #1e1e1e;
  border: 1px solid #555;
  border-radius: 10px;
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
}

button:hover {
  background-color: #333;
  transform: scale(1.05);
}

.instruction {
  font-size: 1rem;
  opacity: 0.7;
}

/* Responsif */
@media (max-width: 600px) {
  h1 {
    font-size: 2rem;
  }

  .coin {
    width: 140px;
    height: 140px;
    font-size: 2rem;
  }

  button {
    font-size: 0.9rem;
    padding: 10px 16px;
  }
}