body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f4f4f4;
}

.app {
  max-width: 100%;
  margin: 0 auto;
  padding: 20px;
  background-color: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.navbar {
  background-color: #007bff;
  color: #fff;
  padding: 15px;
  text-align: center;
  border-radius: 5px;
  margin-bottom: 20px;
}

.navbar h1 {
  margin: 0;
  font-size: 1.5rem;
}

.section {
  margin-bottom: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
  overflow: hidden;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  background-color: #f9f9f9;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.section-header:hover {
  background-color: #e9e9e9;
}

.section-header h2 {
  margin: 0;
  font-size: 1.2rem;
  color: #007bff;
}

.section-header .arrow {
  font-size: 1.2rem;
  color: #007bff;
}

.section-content {
  padding: 15px;
  background-color: #fff;
  border-top: 1px solid #ddd;
  display: none;
}

ul, ol {
  padding-left: 20px;
}

ul li, ol li {
  margin-bottom: 10px;
}

/* Responsive Design */
@media (max-width: 600px) {
  .navbar h1 {
    font-size: 1.2rem;
  }

  .section-header h2 {
    font-size: 1rem;
  }
}