body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #000000, #2f2f2f);
  color: #fff;
  text-align: center;
  padding: 2rem;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.plano {
  background: #111;
  border-radius: 12px;
  padding: 2rem;
  margin: 1rem auto;
  max-width: 500px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.plano:hover {
  transform: scale(1.03);
}

.plano h2 {
  margin-bottom: 1rem;
  font-size: 1.8rem;
}

.plano p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 1.5rem;
}

.plano a {
  display: inline-block;
  background: #00c853;
  color: white;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.3s ease;
}

.plano a:hover {
  background: #00c853;
}

.voltar {
  margin-top: 2rem;
  display: inline-block;
  color: #ccc;
  text-decoration: none;
  font-size: 0.95rem;
}

.voltar:hover {
  text-decoration: underline;
}