body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    color: #333;
  }
  header {
    background-color: #4a90e2;
    color: white;
    padding: 20px 0;
    text-align: center;
  }
  nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 10px;
  }
  nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
  }
  .container {
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
    background: white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
  }
  .section-title {
    font-size: 24px;
    margin-bottom: 20px;
  }
  footer {
    text-align: center;
    padding: 10px;
    background-color: #333;
    color: white;
    margin-top: 20px;
  }
  button {
    background-color: #4a90e2;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
    transition: background 0.3s;
  }
  button:hover {
    background-color: #357ab7;
  }