* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html, body {
      height: 100%;
      font-family: Arial, sans-serif;
      background-color: #f5f5f5;
    }

    /* Container Geral: sidebar (250px) + main (resto) */
    .container {
      display: grid;
      grid-template-columns: 250px 1fr;
      height: 100vh; /* Tela cheia */
    }

    /* SIDEBAR (Desktop) */
    .sidebar {
      background-color: #ffffff;
      border-right: 1px solid #ddd;
      padding: 20px;
      overflow-y: auto;
    }
    .sidebar-nav a {
      display: block;
      text-decoration: none;
      color: #333;
      padding: 10px 0;
      font-weight: 500;
      border-bottom: 1px solid #eee;
      margin-bottom: 10px;
      transition: background-color 0.2s;
    }
    .sidebar-nav a:hover,
    .sidebar-nav a.active {
      background-color: #f0f0f0;
    }
    .sidebar-nav a i {
      color: #1E90FF;
      margin-right: 8px;
    }

    /* MAIN: topbar + conteúdo (iframe) */
    .main {
      display: flex;
      flex-direction: column;
      height: 100%;
      overflow: hidden;
    }

    /* TOPBAR (Desktop e Mobile) */
    .topbar {
      height: 60px;
      background-color: #fff;
      border-bottom: 1px solid #ddd;
      display: flex;
      align-items: center;
      justify-content: space-between; /* Título à esquerda, ícone à direita */
      padding: 0 20px;
      flex-shrink: 0;
      position: relative; /* Para menu dropdown mobile */
      z-index: 2;         /* Fica acima do conteúdo */
    }
.topbar h2 {
      font-size: 20px;
      font-weight: 600;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
}
  .topbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .language-selector {
    padding: 4px 8px;
  }
    /* Ícone de menu - só aparece no mobile */
    .menu-toggle {
      display: none;
      font-size: 22px;
      cursor: pointer;
      color: #333;
    }

    /* CONTEÚDO (iframe) */
    .content {
      flex: 1;
      overflow-y: auto;
    }
    .content iframe {
      width: 100%;
      height: 100%;
      border: none;
      display: block;
    }

    /* MENU DROPDOWN (mobile) - aparece abaixo da topbar */
    .mobile-menu {
      display: none;
      position: absolute;
      top: 60px;
      left: 0;
      right: 0;
      background-color: #fff;
      border-bottom: 1px solid #ddd;
    }
    .mobile-menu a {
      display: block;
      padding: 10px 20px;
      border-bottom: 1px solid #eee;
      text-decoration: none;
      color: #333;
      font-weight: 500;
    }
    .mobile-menu a:hover,
    .mobile-menu a.active {
      background-color: #f0f0f0;
    }

    /* MOBILE: esconde sidebar e exibe ícone hamburger */
    @media (max-width: 768px) {
      .container {
        grid-template-columns: 1fr;
      }
      .sidebar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
    }