* { box-sizing: border-box; }

:root {
  --bg-color: #ffffff;
  --text-color: #2b2b2b;
  --text-subtle: #666;
  --primary-green: #1b4332;
  --secondary-green: #40916c;
  --accent-green-light: #b7d8c8;
  --accent-green-bg: #e8f3ec;
  --accent-green-hover: #d1e7dd;
  --card-bg: #fafdfb;
  --card-border: #dfe9e3;
  --subtle-bg: #f0f7f3;
  --highlight-bg: #fcf8e3;
}

body.dark-mode {
  --bg-color: #202124;
  --text-color: #e8eaed;
  --text-subtle: #9aa0a6;
  --primary-green: #52b788;
  --secondary-green: #40916c;
  --accent-green-light: #4a5055;
  --accent-green-bg: #2e3a34;
  --accent-green-hover: #3a4c42;
  --card-bg: #303134;
  --card-border: #3c4043;
  --subtle-bg: #282a2d;
  --highlight-bg: #4d4a3c;
}

body {
  scroll-behavior: smooth;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.5;
  font-size: 10.5pt;
  counter-reset: page;
}

a {
  text-decoration: none;
}

/* ---------- MENU HAMBÚRGUER ---------- */
.menu-toggle-btn {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--accent-green-light);
  border-radius: 50%;
  cursor: pointer;
  z-index: 101;
  transition: background-color 0.2s;
}
.menu-toggle-btn:hover {
  background-color: var(--accent-green-bg);
}
.menu-toggle-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--primary-green);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.menu-toggle-btn.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle-btn.is-active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle-btn.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.main-menu {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 280px;
  display: flex;
  flex-direction: column;
  background-color: var(--card-bg);
  border-right: 1px solid var(--card-border); /* Altura do cabeçalho */
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  z-index: 100;
}
.main-menu nav {
  padding: 80px 20px 20px;
  display: flex;
  flex-direction: column;
  height: 100%;
  flex-grow: 1;
}
.main-menu.open {
  transform: translateX(0);
}
.main-menu-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  font-size: 12pt;
  font-weight: 600;
  color: var(--primary-green);
  border-radius: 8px;
  transition: background-color 0.18s ease;
}
.main-menu-link:hover {
  background-color: var(--accent-green-bg);
}
.main-menu-link.disabled {
  color: var(--text-subtle);
  cursor: not-allowed;
  pointer-events: none;
}
.main-menu-link.disabled:hover {
  background-color: transparent;
}
.soon-badge {
  font-size: 8pt;
  font-weight: 600;
  color: var(--text-subtle);
  background-color: var(--subtle-bg);
  padding: 3px 7px;
  border-radius: 10px;
  margin-left: 8px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.main-menu-divider {
  height: 1px;
  background-color: var(--card-border);
  margin: 10px 16px;
}
.main-menu-footer {
  margin-top: auto; /* Empurra o rodapé para o fundo */
  padding-top: 10px;
}
.menu-footer-title {
  font-size: 9pt;
  font-weight: 700;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 0 16px 8px;
}
.menu-footer-link {
  display: block;
  padding: 8px 16px;
  font-size: 10pt;
  color: var(--secondary-green);
}
.main-menu-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 99; /* Abaixo do menu, acima do resto */
}

.main-menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ---------- CABEÇALHO PRINCIPAL (STICKY) ---------- */
.main-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  background-color: transparent;
  border-bottom: 1px solid var(--accent-green-light);
  position: sticky;
  top: 0;
  z-index: 30; /* Acima do conteúdo, abaixo do menu */
  transition: background-color 0.25s ease, box-shadow 0.25s ease;
}

/* Estilo do cabeçalho quando a página é rolada */
.main-topbar.is-scrolled {
  background-color: var(--bg-color);
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
body.dark-mode .main-topbar.is-scrolled {
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------- COVER ---------- */
.cover {
  min-height: 45vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  background: radial-gradient(120% 140% at 15% 0%, #2d6a4f 0%, #1b4332 55%, #122b21 100%);
  color: #ffffff;
}
.cover-bg-shape::before {
  content: '';
  position: absolute;
  top: -18%;
  right: -12%;
  width: 60%;
  padding-bottom: 60%;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.cover-bg-shape::after {
  content: '';
  position: absolute;
  bottom: -25%;
  left: -10%;
  width: 50%;
  padding-bottom: 50%;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.cover-content {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px 16px 60px;
}
@keyframes coverFadeInUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cover .leaf {
  font-size: 56pt;
  margin-bottom: 6px;
  filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.18));
  animation: coverFadeInUp 0.7s ease-out 0.05s both;
}
.cover h1 {
  font-size: 34pt;
  margin: 0 0 10px 0;
  font-weight: 700;
  letter-spacing: 0.3px;
  animation: coverFadeInUp 0.7s ease-out 0.2s both;
}
.cover h2 {
  font-size: 14pt;
  font-weight: 400;
  opacity: 0.88;
  margin: 0 0 36px 0;
  max-width: 480px;
  animation: coverFadeInUp 0.7s ease-out 0.35s both;
}
.cover .stats {
  display: flex;
  gap: 14px;
  margin-top: 8px;
  flex-wrap: wrap;
  justify-content: center;
  animation: coverFadeInUp 0.7s ease-out 0.5s both;
}
.cover .stat {
  text-align: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  padding: 14px 24px;
  min-width: 96px;
  backdrop-filter: blur(6px);
}
.cover .stat .num {
  font-size: 21pt;
  font-weight: 700;
  display: block;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.cover .stat .label {
  font-size: 8pt;
  letter-spacing: 0.6px;
  opacity: 0.85;
  text-transform: uppercase;
}
.cover .footer-note {
  position: relative;
  z-index: 2;
  text-align: center;
  font-size: 9pt;
  opacity: 0.6;
  padding-bottom: 22px;
  animation: coverFadeInUp 0.7s ease-out 0.65s both;
}

/* ---------- FAVORITOS (capa) ---------- */
#favorites-section.has-favorites {
  background-color: var(--accent-green-bg);
  border-bottom: 1px solid var(--card-border);
}
.favorites-inner {
  max-width: 90%;
  margin: 0 auto;
  padding: 18px 0 20px;
}
.favorites-title {
  font-size: 10pt;
  font-weight: 700;
  color: var(--primary-green);
  margin: 0 0 10px 0;
  letter-spacing: 0.2px;
}
.favorites-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.favorite-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-left: 3px solid #e8b400;
  border-radius: 0 6px 6px 0;
  padding: 9px 10px 9px 13px;
}
.favorite-link {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: inherit;
}
.favorite-link:hover .favorite-question {
  text-decoration: underline;
}
.favorite-question {
  font-size: 10pt;
  color: var(--text-color);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.favorite-subcat {
  font-size: 8pt;
  color: var(--text-subtle);
  white-space: nowrap;
  flex-shrink: 0;
}
.favorite-remove-btn {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14pt;
  line-height: 1;
  color: var(--text-subtle);
  padding: 2px 6px;
}
.favorite-remove-btn:hover {
  color: var(--error, #b3261e);
}

/* ---------- TOC ---------- */
.toc {
  padding-top: 90px;
  max-width: 90%; /* Comprime o índice para não ocupar a largura toda */
  margin: 0 auto; /* Centra o bloco do índice na página */
}
.toc-header {
  border-bottom: 3px solid var(--secondary-green);
  margin-bottom: 20px;
}
.toc h1 {
  color: var(--primary-green);
  font-size: 20pt;
  padding-bottom: 8px;
  margin: 0;
}
.toc-search {
  position: relative;
  margin-bottom: 20px;
}
.toc-search input {
  width: 100%;
  padding: 10px 110px 10px 35px;
  border-radius: 5px;
  border: 1px solid var(--accent-green-light);
  font-size: 11pt;
  background-color: var(--bg-color);
  color: var(--text-color);
}
.toc-search::before {
  content: '🔎';
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
}
.search-nav {
  position: absolute;
  right: 8px;
  top: 6px;
  bottom: 6px;
  display: none; /* Fica visível via JS */
  align-items: center;
  gap: 12px;
  padding: 0 8px;
  background-color: var(--subtle-bg);
  border-radius: 5px;
}
.search-nav.visible {
  display: flex;
}
.search-total {
  font-size: 10pt;
  color: var(--text-subtle);
  white-space: nowrap;
}
.search-count {
  font-size: 10pt;
  color: var(--text-subtle);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.qa-card.search-active {
  border-left-color: var(--primary-green);
  box-shadow: 0 0 0 2px var(--secondary-green);
}
.toc-controls {
  margin-bottom: 20px;
  display: flex;
  gap: 10px;
}
.toc-controls button {
  background-color: var(--accent-green-bg);
  border: 1px solid var(--accent-green-light);
  color: var(--primary-green);
  padding: 8px 12px;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 600;
  font-size: 9pt;
  transition: background-color 0.2s;
}
.toc-controls button:hover {
  background-color: var(--accent-green-hover);
}
#theme-toggle {
  background: none;
  border: 1px solid var(--accent-green-light);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--primary-green);
  transition: background-color 0.2s;
}
#theme-toggle:hover {
  background-color: var(--accent-green-bg);
}
.lang-switcher {
  position: relative;
}
.lang-switcher-trigger {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--accent-green-light);
  border-radius: 50px;
  padding: 8px 12px 8px 10px;
  cursor: pointer;
  font-size: 13px;
}
.lang-switcher-trigger .lang-flag {
  width: 24px;
  height: 17px;
}
.lang-flag {
  display: block;
  width: 20px;
  height: 14px;
  border-radius: 2px;
  object-fit: cover;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12);
}
.lang-switcher-arrow {
  font-size: 11px;
  color: var(--primary-green);
  transition: transform 0.2s ease;
}
.lang-switcher-trigger[aria-expanded="true"] .lang-switcher-arrow {
  transform: rotate(180deg);
}
.lang-switcher-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  margin: 0;
  padding: 8px;
  list-style: none;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  min-width: 210px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  display: block;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.96);
  transform-origin: top right;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  z-index: 50;
}
.lang-switcher-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}
.lang-switcher-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-color);
  font-size: 12pt;
  font-weight: 600;
}
.lang-switcher-option .lang-flag {
  width: 26px;
  height: 18px;
}
.lang-switcher-option:hover {
  background-color: var(--subtle-bg);
}
.lang-switcher-option.active {
  background-color: var(--accent-green-bg);
  color: var(--primary-green);
}
.toc a {
  text-decoration: none;
  color: inherit;
}
.toc-subcategory {
  border-top: 1px solid var(--card-border);
}
.toc-subcategory:first-child {
  border-top: none;
}

.toc-category, .toc-subcategory, .toc-question {
  color: inherit;
  cursor: pointer;
}
.toc-category-header, .toc-subcategory-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 8px;
  transition: background-color 0.2s;
}
.toc-category-header {
  /* Estilo não selecionado */
  background-color: var(--bg-color);
  border: 1px solid var(--secondary-green);
  border-radius: 6px;
  margin-top: 10px;
  /* Lógica para ficar fixo */
  position: sticky;
  top: 0;
  z-index: 10;
}
/* Aplica o estilo "sticky" apenas se a categoria também estiver ativa (aberta) */
.toc-category.active .toc-category-header.is-sticky {
  background-color: var(--primary-green);
  color: #ffffff;
}
.toc-category.active .toc-category-header.is-sticky .toc-arrow {
  color: #ffffff;
}
.toc-category-header:hover, .toc-subcategory-header:hover {
  background-color: var(--subtle-bg);
}
.toc-category-title, .toc-subcategory-title {
  font-size: 11pt;
  font-weight: 600;
}
.toc-emoji {
  margin-right: 10px;
}
.toc-category-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}
.toc-category-count {
  font-size: 8pt;
  font-weight: 500;
  color: var(--text-subtle);
  white-space: nowrap;
  letter-spacing: 0.2px;
}
.toc-category.active .toc-category-header.is-sticky .toc-category-count {
  color: rgba(255, 255, 255, 0.75);
}
.toc-subcategory-count {
  margin: 0;
}
.toc-arrow {
  /* Removemos o texto e criamos a seta com CSS */
  display: inline-block;
  width: 8px; /* Largura da seta */
  height: 8px; /* Altura da seta */
  border-top: 2px solid var(--secondary-green);
  border-right: 2px solid var(--secondary-green);
  transform: rotate(45deg); /* Aponta para a direita por defeito */
  transition: transform 0.3s ease;
  font-size: 0; /* Esconde o triângulo de texto (▶) que possa estar no HTML */
}
.toc-category.active .toc-arrow, .toc-subcategory.active .toc-arrow {
  transform: rotate(135deg); /* Aponta para baixo quando aberto */
}
.toc-subcategory-list, .toc-question-list {
  display: block;
  max-height: 0;
  overflow: hidden;
  background: var(--subtle-bg);
  padding: 0 0 0 24px; /* Aumenta o recuo para a linha guia */
  border: 1px solid transparent;
  border-top: none;
  border-radius: 0 0 6px 6px;
  /* Curva de animação mais suave e transição de opacidade */
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              padding-top 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              padding-bottom 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.2s ease,
              opacity 0.3s ease;
  opacity: 0;
  position: relative; /* Necessário para a linha guia */
}
/* Linha guia vertical para indicar hierarquia */
.toc-subcategory-list::before, .toc-question-list::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background-color: var(--accent-green-light);
  border-radius: 2px;
}
/* O preview de perguntas (link para o artigo) já tem o seu próprio cartão
   com fundo e borda, por isso a linha guia do pai fica visualmente a mais
   e sobreposta de forma estranha — escondemo-la neste caso específico. */
.toc-question-list:has(.subcategory-questions-container)::before {
  display: none;
}
.toc-subcategory-list.is-open, .toc-question-list.is-open {
  padding-right: 12px;
  padding-top: 10px;
  padding-bottom: 10px;
  border-color: var(--card-border);
  opacity: 1;
}
/* Remove a animação para as listas de perguntas dentro das subcategorias */
.toc-question-list.no-animation {
  transition: none;
}

.toc-question-list .qa-card {
  cursor: default;
}

.qa-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-left: 4px solid var(--accent-green-light);
  border-radius: 0 6px 6px 0;
  padding: 12px 15px;
  margin-bottom: 10px;
}
.subcategory-questions-container {
  display: block;
  padding: 15px 15px 15px 18px;
  border: 1px solid var(--card-border);
  border-left: 4px solid var(--secondary-green);
  border-radius: 0 6px 6px 0;
  background-color: var(--card-bg);
  margin-bottom: 10px; /* Adiciona espaço após a caixa de perguntas */
  color: inherit;
  transition: background-color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.search-snippet {
  display: block;
  font-size: 9pt;
  color: var(--text-subtle);
  margin: -4px 0 12px 36px;
  padding-left: 10px;
  border-left: 2px solid var(--card-border);
  line-height: 1.4;
  position: relative;
  z-index: 1;
}
.subcategory-questions-container:hover {
  background-color: var(--accent-green-hover);
  border-left-color: var(--primary-green);
}
.subcategory-questions-intro {
  font-size: 9.5pt;
  font-weight: 700;
  color: var(--primary-green);
  margin: 0;
  padding-bottom: 8px;
}
.subcategory-questions-list p {
  margin: 0 0 8px 0;
  font-size: 10pt;
  padding-left: 18px;
  position: relative;
}
.subcategory-questions-list p::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--secondary-green);
  font-weight: 700;
}
.subcategory-question-link {
  display: block;
  padding: 8px 12px 8px 22px;
  margin: 0 -12px 4px;
  font-size: 10pt;
  position: relative;
  border-radius: 6px;
  color: var(--text-color);
  transition: background-color 0.18s ease;
}
.subcategory-question-link:hover {
  background-color: var(--accent-green-hover);
}
.subcategory-question-link::before {
  content: '›';
  position: absolute;
  left: 8px;
  color: var(--secondary-green);
  font-weight: 700;
}
.qa-question {
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 5px;
  font-size: 10.5pt;
}
.qa-source {
  font-size: 8.5pt;
  color: var(--text-subtle);
  margin-top: 5px;
  font-style: italic;
}

/* ---------- SECÇÃO DE CONTACTO ---------- */
.contact-section {
  background-color: var(--subtle-bg);
  padding: 20px 20px;
  margin-top: 40px;
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
}
.contact-inner {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}
.contact-section h3 {
  font-size: 18pt;
  color: var(--primary-green);
  margin: 0 0 12px 0;
}
.contact-section p {
  font-size: 11pt;
  color: var(--text-subtle);
  margin: 0 0 20px 0;
  line-height: 1.6;
}
.contact-button {
  display: inline-block;
  background-color: var(--primary-green);
  color: #ffffff;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 11pt;
  transition: background-color 0.2s;
}
.contact-button:hover {
  background-color: #143a2b;
  color: #ffffff;
}

.page-footer {
  font-size: 8pt;
  color: var(--text-subtle);
  text-align: center;
  margin: 20px 0;
}

mark {
  background-color: var(--highlight-bg);
  padding: 1px 3px;
  border-radius: 3px;
}

#back-to-top-btn {
  position: fixed;
  bottom: 10px; /* Começa mais baixo para a animação */
  right: 20px;
  display: none; /* Hidden by default */
  justify-content: center; /* Garante que a seta está sempre centrada */
  align-items: center; /* Garante que a seta está sempre centrada */
  background-color: var(--primary-green);
  color: #ffffff;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 22px;
  cursor: pointer;
  z-index: 100;
  opacity: 0; /* Começa invisível para a animação */
  transform: translateY(10px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: opacity 0.3s ease, transform 0.3s ease, bottom 0.3s ease;
}
#back-to-top-btn:hover {
  opacity: 1;
  transform: translateY(-2px); /* Efeito de elevação */
}

/* ---------- Otimizações para Dispositivos Móveis ---------- */
@media (max-width: 768px) {
  .cover-topbar {
    padding: 16px;
  }
  .cover-content {
    padding: 16px 16px 50px;
  }
  .cover h1 {
    font-size: 24pt;
  }
  .cover h2 {
    font-size: 12pt;
  }
  .cover .stats {
    gap: 10px;
  }
  .cover .stat {
    padding: 10px 16px;
    min-width: 80px;
  }
  .cover .stat .num {
    font-size: 18pt;
  }

  .toc {
    padding-top: 30px;
    max-width: 95%;
  }

  #back-to-top-btn {
    width: 45px;
    height: 45px;
    font-size: 20px;
  }
}

/* Respeita a preferência do utilizador por menos animação */
@media (prefers-reduced-motion: reduce) {
  .cover .leaf,
  .cover h1,
  .cover h2,
  .cover .stats,
  .cover .footer-note {
    animation: none;
    opacity: 1;
    transform: none;
  }
  .toc-subcategory-list,
  .toc-question-list,
  .lang-switcher-menu,
  .lang-switcher-arrow,
  .toc-arrow {
    transition: none !important;
  }
}