/* Estilo base */
  body {
    background-color: #f8f9fa;
  }

  .theme-header {
    background: rgb(18, 53, 84);
    color: white;
    padding: 40px 20px;
    border-radius: 16px;
    text-align: center;
    margin-bottom: 40px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  }

  .theme-header h1,
  .theme-header h3 {
    margin-bottom: 10px;
  }

  .section-title {
    font-size: 1.4rem;
    font-weight: 600;
    border-left: 5px solid rgb(18, 53, 84);
    padding-left: 12px;
    margin-bottom: 20px;
    color: #123554;
  }

  .accordion-button {
    font-weight: 600;
  }

  .accordion-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    margin-bottom: 15px;
  }

  .card {
    border-radius: 14px;
    overflow: hidden;
  }

  .card-header {
    font-weight: 600;
    font-size: 1rem;
  }

  .card-body p {
    font-size: 0.95rem;
    color: #333;
  }

  .list-group-item {
    border: none;
    font-size: 0.95rem;
  }

  .list-group-item a {
    text-decoration: none;
    color: #1d3557;
    font-weight: 500;
  }

  .list-group-item a:hover {
    text-decoration: underline;
  }

  .accordion-body {
    font-size: 0.95rem;
    color: #333;
  }

  /* Estilos GitHub Markdown */
  .accordion-body h1,
  .accordion-body h2,
  .accordion-body h3,
  .accordion-body h4,
  .accordion-body h5,
  .accordion-body h6 {
    font-weight: bold;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
  }

  .accordion-body p {
    margin: 0.8rem 0;
  }

  .accordion-body pre {
    background-color: #f6f8fa;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.5;
  }

  .accordion-body code {
    background-color: #eee;
    padding: 2px 5px;
    border-radius: 4px;
    font-family: monospace;
  }

  .accordion-body pre code {
    background: none;
    padding: 0;
  }

  .accordion-body ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
  }

  .accordion-body ol {
    list-style-type: decimal;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
  }

  .accordion-body blockquote {
    border-left: 4px solid #ccc;
    padding-left: 1rem;
    color: #666;
    margin: 1rem 0;
    font-style: italic;
  }

  .accordion-body table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    margin-bottom: 1rem;
  }

  .accordion-body th,
  .accordion-body td {
    border: 1px solid #ddd;
    padding: 0.5rem;
    text-align: left;
  }

  .accordion-body th {
    background-color: #f1f1f1;
    font-weight: bold;
  }

  /* Links Markdown */
  .accordion-body a {
    color: #0d6efd;
    text-decoration: underline;
  }

  .accordion-body a:hover {
    color: #0a58ca;
  }

  /* Vídeos responsivos */
  .ratio iframe {
    border-radius: 10px;
  }

  /* Árvore de pastas */
  .folder-tree {
    font-family: 'Segoe UI', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
  }

  .folder-node {
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 2px dashed #ccc;
    margin-bottom: 1rem;
  }

  .folder-children {
    display: block;
    margin-left: 1rem;
  }

  .folder-node.collapsed .folder-children {
    display: none;
  }

  .folder-node .toggle-icon {
    transition: transform 0.2s ease;
  }

  .folder-node.collapsed .toggle-icon {
    transform: rotate(-90deg);
  }

  .file-item {
    display: block;
    margin-bottom: 0.4rem;
    margin-left: 0.5rem;
    color: #1d3557;
    text-decoration: none;
    font-size: 1rem;
  }

  .file-item:hover {
    text-decoration: underline;
    color: #0d6efd;
  }

  .file-item i {
    margin-right: 0.4rem;
    color: #0d6efd;
  }

  /* Responsivo */
  @media (max-width: 576px) {
    .folder-node {
      margin-left: 0.6rem;
      padding-left: 0.6rem;
    }
    .folder-toggle {
      font-size: 1rem;
    }
    .file-item {
      font-size: 0.9rem;
    }
  }