body {
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    /* background: #f8f9fa; */
    background-color: #1e88e5; /* Fondo azul para demostración */
    padding: 20px; /* padding: 0; */
    color: #333;
    margin: 0;
    line-height: 1.6;
  }
  header {
    background: linear-gradient(135deg, #001f3f 0%, #003366 100%);
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
  }

  header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ffd700, #c0c0c0, #cd7f32);
  }

  .logo-container {
    margin: 0 auto 1.5rem;
    max-width: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .logo-container img {
    max-width: 100%;
    height: auto;
    filter: brightness(0) invert(1);
    transition: transform 0.3s ease;
  }

  .logo-container img:hover {
    transform: scale(1.05);
  }

  header h1 {
    margin: 0 0 0.5rem;
    font-size: 2.2rem;
    letter-spacing: 0.5px;
    font-weight: 300;
  }

  header p {
    margin: 0;
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
  }

  main {
    max-width: 900px;
    margin: 3rem auto;
    padding: 2.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    position: relative;
  }

  main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #001f3f, #003366);
    border-radius: 12px 12px 0 0;
  }

  h2 {
    color: #001f3f;
    margin-top: 0;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #eaeaea;
    font-weight: 400;
    font-size: 1.5rem;
  }

  ul {
    list-style: none;
    padding: 0;
  }

  li {
    margin: 1rem 0;
    padding: 1rem 1.25rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
  }

  li:hover {
    background-color: #f8f9fa;
    border-left: 3px solid #003366;
    transform: translateX(5px);
  }

  a {
    text-decoration: none;
    color: #003366;
    font-weight: 500;
    display: block;
    transition: color 0.2s;
  }

  a:hover {
    color: #0055aa;
  }

  .doc-date {
    display: block;
    font-size: 0.85rem;
    color: #666;
    margin-top: 0.25rem;
    font-style: italic;
  }

  footer {
    text-align: center;
    padding: 2rem 1rem;
    font-size: 0.9rem;
    color: #666;
    margin-top: 2rem;
    background: #f0f2f5;
    border-top: 1px solid #eaeaea;
  }

  @media (max-width: 768px) {
    main {
      margin: 2rem 1rem;
      padding: 1.5rem;
    }

    header h1 {
      font-size: 1.8rem;
    }

    .logo-container {
      max-width: 150px;
    }
  }