* { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    font-family: sans-serif;
    background-color: #f5f5f5;
    color: #222;
    line-height: 1.6;
  }

  header {
    position: fixed;
    top: 0; left: 0; right: 0;
    background-color: #003366;
    color: #fff;
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    z-index: 1000;
  }
  header h1 {
    font-size: 1.2rem;
    margin-right: 2rem;
    white-space: nowrap;
  }

  nav {
    display: flex;
    gap: 1rem;
  }
  nav a {
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    white-space: nowrap;
  }

  .search-box {
    margin-left: auto;
    margin-right: 1rem;
    display: flex;
    gap: 0.3rem;
  }
  .search-box input {
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    border: 1px solid #ccc;
    color: #000;
  }
  .search-box button {
    padding: 0.2rem 0.7rem;
    border-radius: 3px;
    background: #0066cc;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
  }

  .hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 25px;
    height: 25px;
    margin-left: auto;
    cursor: pointer;
  }
  .hamburger span {
    background: #fff;
    height: 3px;
    margin: 3px 0;
    border-radius: 2px;
  }

  @media (max-width: 768px) {
    nav {
      display: none;
      position: absolute;
      top: 50px;
      left: 0;
      right: 0;
      background: #003366;
      flex-direction: column;
      padding: 0.5rem 1rem;
      gap: 0.5rem;
    }
    nav.active {
      display: flex;
    }
    .search-box {
      display: none;
    }
    .hamburger {
      display: flex;
    }
  }

  .container {
    display: grid;
    grid-template-columns: 1fr 3fr 1fr;
    gap: 1rem;
    padding: 6rem 1rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
  }
  aside, main {
    background: #fff;
    padding: 1rem;
    border: 1px solid #ccc;
  }
  aside h2 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    border-bottom: 2px solid #003366;
    padding-bottom: 0.3rem;
  }
  aside ul { list-style: none; font-size: 0.9rem; }
  aside ul li { margin-bottom: 0.3rem; }
  aside button {
    display: block;
    width: 100%;
    padding: 0.4rem;
    margin-bottom: 0.5rem;
    background: #003366;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    border-radius: 3px;
  }

  main h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid #003366;
    padding-bottom: 0.3rem;
  }
  main img {
    width: 100%;
    height: auto;
    max-width: 100%;
    margin: 1rem 0;
  }

  @media (max-width: 768px) {
    .container { display: flex; flex-direction: column; }
    aside, main { margin-bottom: 1rem; }
    main { order: 1; }
    aside.left { order: 2; }
    aside.right { order: 3; }
  }