html, body {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
  }
  body {
    display: flex;
    flex-direction: column;
  }
  header {
    background-color: #006928;
    color: #fff;
    padding: 1rem 2rem;
    text-align: center;
  }
  nav {
    margin-top: 10px;
  }
  nav a {
    color: #fff;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
  }
  nav a:hover,
  nav a.active {
    text-decoration: underline;
  }
  .content {
    padding: 2rem;
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
  }
  .content h2 {
    margin-bottom: 1rem;
    text-align: center;
    color: #006928;
  }
  .content h3 {
    margin-top: 2rem;
  }
  .content p {
    color: #555;
    line-height: 1.6;
    text-align: justify;
  }
  .content img {
    display: block;
    margin: 1rem auto;
    max-width: 300px;
    width: 100%;
    height: auto;
  }
  footer {
    background-color: #006928;
    color: #fff;
    text-align: center;
    padding: 1rem;
  }