body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #f0f4f8;
  color: #333;
}

nav {
  background-color: #003366;
  padding: 10px;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 0;
  padding: 0;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

header {
  background-color: #0056b3;
  color: white;
  padding: 30px 20px;
  text-align: center;
}

main {
  padding: 20px;
  max-width: 1200px;
  margin: auto;
}

.section {
  background: white;
  margin-bottom: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  overflow: hidden;
  transition: all 0.3s ease;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #e9f1fb;
  padding: 15px 20px;
  cursor: pointer;
}

.section h2 {
  margin: 0;
  color: #004080;
}

.toggle-btn {
  font-size: 1.2rem;
  border: none;
  background: none;
  cursor: pointer;
}

.section-content {
  max-height: 0;
  overflow: hidden;
  padding: 0 20px;
  transition: max-height 0.4s ease;
}

.section-content.open {
  padding: 10px;
  max-height: 5000px; /* Suficiente para mostrar contenido */
}

footer {
  text-align: center;
  padding: 15px;
  background-color: #ddd;
  margin-top: 30px;
}