body {
  margin: 0;
  padding: 0;
  font-family: 'Poppins', sans-serif;
  min-height: 100vh;
  background-color: #b71c1c;
  background-image: radial-gradient(#d32f2f 1px, transparent 1px);
  background-size: 40px 40px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.main-container {
  background: white;
  padding: 2rem 2.5rem;
  border-radius: 20px;
  width: 90%;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 0 25px rgba(183, 28, 28, 0.6);
  animation: entrada 0.6s ease-out;
}

@keyframes entrada {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.main-container h1 {
  color: #b71c1c;
  margin-bottom: 5px;
}

.main-container p {
  color: #333;
  margin-bottom: 20px;
  font-weight: 600;
}

.opciones {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.card {
  display: block;
  padding: 15px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1rem;
  transition: all 0.2s ease;
  border: 2px solid #b71c1c;
  color: #b71c1c;
  background: white;
}

.card:hover {
  background: #b71c1c;
  color: white;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 20px rgba(183, 28, 28, 0.5);
}

.primaria::before {
  content: "📚 ";
}

.secundaria::before {
  content: "🏛️ ";
}