@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Crimson+Text:ital,wght@0,400;0,600;1,400&family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&display=swap');

/* style.css — Quintiliano Estilos Principais */

/* ================================================================
   RESET E BASE
   ================================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  background-color: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  /* Textura sutil de papel */
  background-image:
    radial-gradient(circle at 20% 50%, rgba(180,160,100,0.04) 0%, transparent 60%),
    radial-gradient(circle at 80% 20%, rgba(180,160,100,0.03) 0%, transparent 40%);
}

/* ================================================================
   LAYOUT PRINCIPAL
   ================================================================ */

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Cabeçalho */
#site-header {
  background-color: var(--color-ink);
  color: var(--color-paper);
  border-bottom: 3px solid var(--color-accent);
  position: sticky;
  top: 0;
  z-index: 100;
}

/* Linha superior: logo + subtítulo */
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6) var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Linha inferior: navegação completa */
/* Linha de navegação — container centralizado */
.header-nav-row {
  display: flex;
  justify-content: center;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0 var(--space-6) var(--space-2);
}
.header-nav-row::-webkit-scrollbar { display: none; }

/* Linha 1 — módulos principais */
#main-nav {
  display: flex;
  align-items: center;
  gap: 0;
}

/* Linha 2 — módulos avançados + ABL */
.header-nav-row--secondary {
  padding-top: 0;
  padding-bottom: var(--space-2);
  border-top: 1px solid rgba(255,255,255,0.08);
}

#main-nav-secondary {
  display: flex;
  align-items: center;
  gap: 0;
}

/* Links da linha 2 — discretamente menores */
.nav-link--secondary {
  font-size: 10px;
  letter-spacing: 0.06em;
  padding: var(--space-1) var(--space-3);
  color: rgba(255,255,255,0.4);
}
.nav-link--secondary:hover,
.nav-link--secondary:focus {
  color: var(--color-paper);
  background-color: rgba(255,255,255,0.08);
}
.nav-link--secondary.active {
  color: var(--color-paper);
  background-color: rgba(255,255,255,0.10);
}

/* Separador vertical entre módulos e ABL */
.nav-sep {
  display: inline-block;
  width: 1px;
  height: 10px;
  background: rgba(255,255,255,0.18);
  margin: 0 var(--space-3);
  vertical-align: middle;
  flex-shrink: 0;
}

/* Botão ABL — ouro limpo */
.nav-link--abl {
  color: var(--color-gold) !important;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.nav-link--abl:hover,
.nav-link--abl:focus {
  background-color: rgba(184,150,12,0.15) !important;
}
.nav-link--abl.active {
  color: var(--color-gold) !important;
  background-color: rgba(184,150,12,0.18) !important;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.site-logo-word {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-paper);
  white-space: nowrap;
}

.site-logo-sub {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-ghost);
  font-style: italic;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

/* Navegação principal */
#main-nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-link {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-ink-ghost);
  text-decoration: none;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-paper);
  background-color: rgba(255,255,255,0.08);
  outline: none;
}

.nav-link.active {
  color: var(--color-paper);
  background-color: rgba(255,255,255,0.12);
}

/* Botão hambúrguer — visível apenas em mobile */
#nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: none;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  cursor: pointer;
  flex-shrink: 0;
}

#nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-paper);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

#nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
#nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
#nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Indicador de módulo ativo visível no mobile */
#nav-active-label {
  display: none;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-gold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Conteúdo principal */
#main-content {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  padding: var(--space-12) var(--space-8);
}

/* ================================================================
   TIPOGRAFIA
   ================================================================ */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-ink);
  line-height: 1.2;
  font-weight: 600;
}

h1 { font-size: var(--text-3xl); margin-bottom: var(--space-6); }
h2 { font-size: var(--text-2xl); margin-bottom: var(--space-4); }
h3 { font-size: var(--text-xl);  margin-bottom: var(--space-3); }
h4 { font-size: var(--text-lg);  margin-bottom: var(--space-2); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-ink-mid);
}

em { font-style: italic; }
strong { font-weight: 600; color: var(--color-ink); }

/* Linha decorativa sob títulos de seção */
.section-title {
  display: block;
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-8);
  border-bottom: 2px solid var(--color-paper-border);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 3rem;
  height: 2px;
  background-color: var(--color-accent);
}

/* ================================================================
   CARDS E PAINÉIS
   ================================================================ */

.card {
  background-color: var(--color-paper);
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.card-elevated {
  box-shadow: var(--shadow);
}

.panel {
  background-color: var(--color-paper-dark);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-6);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: var(--space-6);
}

.panel-info {
  border-left-color: var(--color-gold);
}

.panel-success {
  border-left-color: var(--color-green);
  background-color: rgba(42, 92, 42, 0.06);
}

.panel-error {
  border-left-color: var(--color-red);
  background-color: rgba(139, 26, 26, 0.06);
}

/* ================================================================
   BOTÕES
   ================================================================ */

.btn {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-ink);
  color: var(--color-paper);
  border-color: var(--color-ink);
}

.btn-primary:hover {
  background-color: var(--color-ink-mid);
  border-color: var(--color-ink-mid);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border-color: var(--color-paper-border);
}

.btn-secondary:hover {
  border-color: var(--color-ink-light);
  background-color: var(--color-paper-dark);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-paper);
  border-color: var(--color-accent);
}

.btn-accent:hover {
  background-color: #6b0000;
  border-color: #6b0000;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-ink-light);
  border-color: transparent;
  padding: var(--space-1) var(--space-3);
}

.btn-ghost:hover {
  color: var(--color-ink);
  background-color: var(--color-paper-dark);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ================================================================
   VISUALIZADOR DE TEXTO (componente central)
   ================================================================ */

.text-display {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: 1.9;
  color: var(--color-ink);
  max-width: var(--content-width);
}

.text-display .token {
  display: inline;
  cursor: pointer;
  border-radius: 2px;
  padding: 0 1px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  position: relative;
}

.text-display .token:hover {
  background-color: var(--color-highlight);
}

.text-display .token.selected {
  background-color: var(--color-select);
  color: var(--color-accent);
  font-weight: 600;
}

.text-display .token.classified {
  border-bottom: 2px solid;
  padding-bottom: 1px;
}

.text-display .token.classified[data-class="sujeito"]   { border-color: #2a5c8b; background: rgba(42,92,139,0.1);  }
.text-display .token.classified[data-class="verbo"]     { border-color: #8b1a1a; background: rgba(139,26,26,0.1); }
.text-display .token.classified[data-class="objeto"]    { border-color: #2a5c2a; background: rgba(42,92,42,0.1);  }
.text-display .token.classified[data-class="adj"]       { border-color: #7a4a00; background: rgba(122,74,0,0.1); }

.text-display .token.hint-highlight {
  background-color: var(--color-highlight-strong);
  animation: pulse-highlight 1.5s ease infinite;
}

@keyframes pulse-highlight {
  0%, 100% { background-color: var(--color-highlight-strong); }
  50%       { background-color: var(--color-highlight); }
}

/* Metadados do texto */
.text-meta {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-ink-ghost);
  margin-bottom: var(--space-6);
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: center;
}

.text-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.text-meta-separator {
  color: var(--color-paper-border);
}

/* ================================================================
   MÓDULO: EXERCÍCIOS
   ================================================================ */

.exercise-container {
  max-width: var(--content-width);
}

.exercise-instruction {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  color: var(--color-ink);
  background-color: var(--color-paper-dark);
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-6);
  line-height: 1.5;
}

.exercise-instruction strong {
  color: var(--color-accent);
}

/* Opções de múltipla escolha */
.options-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.option-item {
  border: 1.5px solid var(--color-paper-border);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
  overflow: hidden;
}

.option-btn {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-ink-mid);
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  line-height: 1.5;
  transition: background-color var(--transition-fast);
}

.option-btn:hover:not(:disabled) {
  background-color: var(--color-paper-dark);
}

.option-btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

.option-letter {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 700;
  width: 1.4rem;
  height: 1.4rem;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-ink-ghost);
  transition: all var(--transition-fast);
}

.option-item.correct  { border-color: var(--color-green); background: rgba(42,92,42,0.06); }
.option-item.incorrect{ border-color: var(--color-red);   background: rgba(139,26,26,0.06);}
.option-item.correct  .option-letter { color: var(--color-green); border-color: var(--color-green); }
.option-item.incorrect .option-letter{ color: var(--color-red);   border-color: var(--color-red);   }

/* Feedback de exercício */
.exercise-feedback {
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-6);
  display: none;
}

.exercise-feedback.visible { display: block; }

.exercise-feedback.success {
  border: 1px solid var(--color-green);
  background: rgba(42,92,42,0.06);
  color: var(--color-green);
}

.exercise-feedback.error {
  border: 1px solid var(--color-red);
  background: rgba(139,26,26,0.06);
  color: var(--color-accent);
}

.feedback-title {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.feedback-explanation {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-ink-mid);
  line-height: 1.6;
}

/* Barra de progresso do exercício */
.exercise-progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-ink-ghost);
}

.progress-bar {
  flex: 1;
  height: 3px;
  background-color: var(--color-paper-border);
  border-radius: 99px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--color-accent);
  border-radius: 99px;
  transition: width var(--transition-slow);
}

/* Legenda de classificação (leitura estrutural) */
.classification-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-paper-dark);
  border-radius: var(--radius);
  border: 1px solid var(--color-paper-border);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-ink-mid);
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.legend-item:hover { background-color: var(--color-paper); }
.legend-item.active { font-weight: 700; }

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-dot-sujeito { background-color: #2a5c8b; }
.legend-dot-verbo   { background-color: #8b1a1a; }
.legend-dot-objeto  { background-color: #2a5c2a; }
.legend-dot-adj     { background-color: #7a4a00; }

/* ================================================================
   MÓDULO: ETIMOLOGIA
   ================================================================ */

.etymology-card {
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.etymology-header {
  background-color: var(--color-ink);
  color: var(--color-paper);
  padding: var(--space-6) var(--space-8);
}

.etymology-word {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.etymology-origin-label {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--space-2);
}

.etymology-body {
  padding: var(--space-6) var(--space-8);
}

/* Linha do tempo de evolução */
.evolution-chain {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-paper-dark);
  border-radius: var(--radius);
}

.evolution-step {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-mid);
  font-style: italic;
}

.evolution-arrow {
  color: var(--color-ink-ghost);
  font-size: var(--text-sm);
}

/* Família de palavras */
.word-family {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.word-chip {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-paper-dark);
  border: 1px solid var(--color-paper-border);
  border-radius: 99px;
  color: var(--color-ink-mid);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.word-chip:hover {
  border-color: var(--color-ink-light);
  background-color: var(--color-paper);
  color: var(--color-ink);
}

/* ================================================================
   MÓDULO: LITERATURA
   ================================================================ */

.author-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.author-card {
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition);
}

.author-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.author-card-header {
  background-color: var(--color-ink-mid);
  color: var(--color-paper);
  padding: var(--space-6);
}

.author-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.author-dates {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-ink-ghost);
}

.author-movement {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  margin-top: var(--space-2);
}

.author-card-body {
  padding: var(--space-6);
  background-color: var(--color-paper);
}

.author-excerpt {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-mid);
  line-height: 1.6;
  /* Truncar após 3 linhas */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Citação de autor */
.author-quote {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-ink-mid);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-6);
  margin: var(--space-6) 0;
  position: relative;
}

/* ================================================================
   PÁGINA INICIAL
   ================================================================ */

.home-hero {
  max-width: var(--content-width);
  margin: 0 auto var(--space-16);
  text-align: center;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  color: var(--color-ink);
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  color: var(--color-ink-light);
  font-style: italic;
  margin-bottom: var(--space-8);
  line-height: 1.5;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.module-card {
  border: 1px solid var(--color-paper-border);
  border-top: 3px solid var(--color-paper-border);
  border-radius: var(--radius);
  padding: var(--space-6);
  background-color: var(--color-paper);
  cursor: pointer;
  text-decoration: none;
  display: block;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  position: relative;
}

.module-card:hover {
  border-top-color: var(--color-accent);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.module-card:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.module-number {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-paper-border);
  line-height: 1;
  margin-bottom: var(--space-4);
}

.module-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-2);
}

.module-description {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-light);
  line-height: 1.6;
}

/* ================================================================
   HINT (DICA)
   ================================================================ */

.hint-btn {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-ink-ghost);
  background: none;
  border: 1px solid var(--color-paper-border);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all var(--transition-fast);
}

.hint-btn:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

/* ================================================================
   CONTROLES DE EXERCÍCIO
   ================================================================ */

.exercise-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}

.exercise-controls-left {
  display: flex;
  gap: var(--space-3);
}

/* ================================================================
   REARRANJO DE FRASES (módulo sintaxe)
   ================================================================ */

.token-pool {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-height: 3rem;
  padding: var(--space-3);
  border: 2px dashed var(--color-paper-border);
  border-radius: var(--radius);
  margin-bottom: var(--space-4);
  transition: border-color var(--transition-fast);
}

.token-pool.drag-over {
  border-color: var(--color-accent);
  background-color: rgba(139,26,26,0.04);
}

.token-pool-label {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-ghost);
  margin-bottom: var(--space-2);
}

.draggable-token {
  font-family: var(--font-body);
  font-size: var(--text-base);
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-paper);
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius-sm);
  cursor: grab;
  user-select: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.draggable-token:hover {
  border-color: var(--color-ink-light);
  box-shadow: var(--shadow);
}

.draggable-token:active {
  cursor: grabbing;
  box-shadow: var(--shadow-lg);
}

.draggable-token.dragging {
  opacity: 0.4;
}

/* ================================================================
   UTILITÁRIOS
   ================================================================ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.divider {
  height: 1px;
  background-color: var(--color-paper-border);
  margin: var(--space-8) 0;
}

.tag {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  background-color: var(--color-paper-dark);
  color: var(--color-ink-light);
  border: 1px solid var(--color-paper-border);
}

.tag-accent {
  background-color: rgba(139,26,26,0.1);
  color: var(--color-accent);
  border-color: rgba(139,26,26,0.3);
}

/* Texto em latim / língua estrangeira */
.lang-foreign {
  font-style: italic;
  color: var(--color-ink-light);
}

/* ================================================================
   RESPONSIVIDADE
   ================================================================ */

@media (max-width: 768px) {
  :root {
    --text-4xl: 2.4rem;
    --text-3xl: 2rem;
    --text-2xl: 1.6rem;
  }

  .header-inner {
    padding: var(--space-3) var(--space-4);
    flex-wrap: nowrap;
    gap: var(--space-3);
  }

  /* Esconde as linhas de nav no mobile — viram dropdown via hambúrguer */
  .header-nav-row {
    display: none;
  }

  /* Hambúrguer aparece */
  #nav-toggle {
    display: flex;
    margin-left: auto;
  }

  /* Label do módulo ativo aparece ao lado do logo */
  #nav-active-label {
    display: block;
  }

  /* Nav vira dropdown ancorado ao header */
  #main-nav,
  #main-nav-secondary {
    display: none;
    flex-direction: column;
    align-items: stretch;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-ink);
    border-bottom: 3px solid var(--color-accent);
    padding: var(--space-2) var(--space-4);
    z-index: 200;
    gap: 2px;
    max-height: 80vh;
    overflow-y: auto;
  }

  #main-nav.open {
    display: flex;
  }

  /* Secundário aparece logo abaixo do primário quando aberto — como continuação */
  #main-nav.open ~ * #main-nav-secondary,
  #main-nav-secondary.open {
    display: flex;
  }

  .nav-link,
  .nav-link--secondary {
    padding: var(--space-3) var(--space-2);
    border-radius: var(--radius);
    font-size: var(--text-base) !important;
    color: var(--color-ink-ghost);
  }

  .nav-sep { display: none; }

  #main-content {
    padding: var(--space-8) var(--space-4);
  }

  .author-grid,
  .modules-grid {
    grid-template-columns: 1fr;
  }}

@media (max-width: 860px) {
  /* Redação — exemplos comentados: texto e anotações em coluna */
  .example-row {
    grid-template-columns: 1fr !important;
  }
}

/* ================================================================
   ANIMAÇÕES DE ENTRADA
   ================================================================ */

.fade-in {
  animation: fadeIn 0.35s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}