/* Base CSS: Central OBI UFABC
   Estilo Minimalista, Moderno, Cores Claras e Código Facilmente Auditável */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--fonte-padrao);
  font-size: var(--tamanho-base);
  line-height: 1.5;
  color: var(--cor-texto-principal);
  background-color: var(--cor-fundo-suave);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 16px 8px;
}

/* Moldura Mobile-First (Clean, 390px - 420px) */
.mobile-viewport {
  width: 100%;
  max-width: 420px;
  min-height: 844px;
  background-color: var(--cor-card);
  border: 1px solid var(--cor-borda);
  border-radius: var(--raio-borda);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding-bottom: var(--altura-menu-inferior, 80px);
}

/* Barra de Acessibilidade (Topo Minimalista e Responsivo com Zoom) */
.accessibility-bar {
  background-color: var(--cor-fundo-suave);
  border-bottom: 1px solid var(--cor-borda);
  padding: 8px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.brand-link {
  font-weight: 700;
  font-size: var(--tamanho-pequeno);
  color: var(--cor-primaria);
  text-decoration: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.accessibility-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.btn-a11y {
  min-width: var(--alvo-toque-minimo);
  min-height: var(--alvo-toque-minimo);
  padding: 6px 12px;
  background-color: var(--cor-fundo);
  color: var(--cor-texto-principal);
  border: 1px solid var(--cor-borda);
  border-radius: var(--raio-botao);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.btn-a11y:hover {
  border-color: var(--cor-primaria);
  color: var(--cor-primaria);
}

/* Foco Acessível Obrigatório (Auditável WCAG 2.1 AA) */
:focus-visible {
  outline: var(--anel-foco);
  outline-offset: 2px;
}

.option-card:focus-within,
.option-card:has(:focus-visible) {
  outline: var(--anel-foco);
  outline-offset: 2px;
}

/* Cabeçalho Interno */
.page-header {
  padding: 12px 16px;
  background-color: var(--cor-card);
  border-bottom: 1px solid var(--cor-borda);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  width: fit-content;
  min-height: var(--alvo-toque-minimo);
  min-width: var(--alvo-toque-minimo);
  padding: 8px 15px;
  border: 1px solid var(--cor-primaria-borda);
  border-radius: 999px;
  background-color: var(--cor-card);
  color: var(--cor-primaria);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--tamanho-pequeno);
  line-height: 1.3;
  box-shadow: var(--sombra-suave);
  transition: background-color .15s ease, border-color .15s ease;
}
.btn-back > span[aria-hidden="true"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--cor-primaria-fundo);
  font-size: 0;
}
.btn-back > span[aria-hidden="true"]::before {
  content: "";
  width: 7px;
  height: 7px;
  border-left: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateX(2px) rotate(45deg);
}
.btn-back:hover {
  background-color: var(--cor-primaria-fundo);
  border-color: var(--cor-primaria);
}
.btn-back:active { box-shadow: none; }

/* Área de Conteúdo da Tela */
.screen-content {
  flex: 1;
  padding: 20px 16px 28px 16px;
  display: flex;
  flex-direction: column;
}

/* Barra de Progresso do Quiz */
.progress-container {
  margin-bottom: 20px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: var(--tamanho-pequeno);
  color: var(--cor-texto-secundario);
  font-weight: 600;
  margin-bottom: 6px;
}

.progress-bar-track {
  width: 100%;
  height: 6px;
  background-color: var(--cor-borda);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--cor-primaria);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.progress-bar-fill.w-33 {
  width: 33%;
}

.progress-bar-fill.w-66 {
  width: 66%;
}

.progress-bar-fill.w-100 {
  width: 100%;
}

/* Títulos Semânticos */
h1.screen-title {
  font-size: var(--tamanho-titulo);
  font-weight: 700;
  color: var(--cor-texto-principal);
  line-height: 1.3;
  margin-bottom: 8px;
}

p.screen-subtitle {
  font-size: var(--tamanho-base);
  color: var(--cor-texto-secundario);
  margin-bottom: 20px;
}

/* Legendas Semânticas de Opções e Quiz */
.options-legend,
.quiz-legend {
  margin-bottom: 12px;
  font-weight: 600;
  font-size: var(--tamanho-pequeno);
  color: var(--cor-texto-principal);
  letter-spacing: 0.01em;
}

/* Cartões de Opção (Alvo de Toque >= 48px, Fundo Claro, Fácil de Auditar) */
.options-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
  border: none;
}

.option-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background-color: var(--cor-card);
  border: 1.5px solid var(--cor-borda);
  border-radius: var(--raio-borda);
  cursor: pointer;
  min-height: var(--alvo-toque-minimo);
  box-shadow: var(--sombra-suave);
  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.option-card:hover {
  border-color: var(--cor-borda-ativa);
  background-color: var(--cor-primaria-fundo);
}

.option-card.selected {
  border-color: var(--cor-primaria);
  background-color: var(--cor-primaria-fundo);
  box-shadow: 0 0 0 1px var(--cor-primaria);
}

.option-card input[type="radio"],
.option-card input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--cor-primaria);
  flex-shrink: 0;
  cursor: pointer;
}

.option-text strong {
  display: block;
  font-size: 0.95rem;
  color: var(--cor-texto-principal);
  margin-bottom: 2px;
}

.option-text span {
  display: block;
  font-size: var(--tamanho-pequeno);
  color: var(--cor-texto-secundario);
}

/* Botões Modernos e Minimalistas */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: var(--alvo-toque-minimo);
  padding: 12px 18px;
  background-color: var(--cor-primaria);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: none;
  border-radius: var(--raio-botao);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-primary:hover {
  background-color: var(--cor-primaria-hover);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: var(--alvo-toque-minimo);
  padding: 12px 18px;
  background-color: var(--cor-fundo);
  color: var(--cor-texto-principal);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--cor-borda);
  border-radius: var(--raio-botao);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-secondary:hover {
  background-color: var(--cor-fundo-suave);
  border-color: var(--cor-primaria);
}

/* Rodapé de Ações */
.screen-actions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Área de Feedback Acessível em Tempo Real (aria-live="polite") */
.feedback-status {
  min-height: 24px;
  margin-top: 4px;
  margin-bottom: 20px;
  padding: 10px 14px;
  border-radius: var(--raio-botao);
  font-size: var(--tamanho-pequeno);
  line-height: 1.4;
  display: none;
  transition: all 0.2s ease-in-out;
}

.feedback-status.visible {
  display: flex;
  align-items: center;
  gap: 8px;
}

.feedback-status.status-info {
  background-color: var(--cor-primaria-fundo);
  border: 1px solid var(--cor-primaria-borda);
  color: var(--cor-primaria-hover);
}

.feedback-status.status-sucesso {
  background-color: var(--cor-sucesso-fundo);
  border: 1px solid var(--cor-sucesso-borda);
  color: var(--cor-sucesso);
  font-weight: 600;
}

.feedback-status.status-aviso {
  background-color: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
  font-weight: 600;
}

/* Suporte Global ao Modo de Alto Contraste (body.high-contrast) */
body.high-contrast .accessibility-bar {
  border-bottom: 2px solid var(--cor-borda);
}

body.high-contrast .page-header {
  border-bottom: 2px solid var(--cor-borda);
}

body.high-contrast .btn-back {
  border: 2px solid var(--cor-borda);
  background-color: #000000;
  color: #ffffff;
}

body.high-contrast .btn-back:hover {
  background-color: #1e3a8a;
  border-color: #ffffff;
}

body.high-contrast .btn-a11y {
  border: 2px solid var(--cor-borda);
  background-color: #000000;
  color: #ffffff;
}

body.high-contrast .btn-a11y:hover {
  background-color: #1e3a8a;
  border-color: #ffffff;
}

body.high-contrast .options-legend,
body.high-contrast .quiz-legend {
  color: #ffffff;
}

body.high-contrast .option-card {
  border: 2px solid var(--cor-borda);
  background-color: var(--cor-card);
  box-shadow: none;
}

body.high-contrast .option-card:hover {
  border-color: var(--cor-primaria);
  background-color: #1e3a8a;
}

body.high-contrast .option-card.selected {
  border: 2.5px solid var(--cor-primaria);
  background-color: #1e3a8a;
  box-shadow: 0 0 0 1px #ffffff;
}

body.high-contrast .option-text strong {
  color: #ffffff;
}

body.high-contrast .option-text span {
  color: #f1f5f9;
}

body.high-contrast .option-card:hover .option-text strong,
body.high-contrast .option-card:hover .option-text span,
body.high-contrast .option-card.selected .option-text strong,
body.high-contrast .option-card.selected .option-text span {
  color: #ffffff;
}

body.high-contrast .btn-primary {
  background-color: var(--cor-primaria);
  color: #000000;
  border: 2px solid #ffffff;
  font-weight: 700;
}

body.high-contrast .btn-primary:hover {
  background-color: #93c5fd;
  color: #000000;
}

body.high-contrast .btn-secondary {
  background-color: #000000;
  color: #ffffff;
  border: 2px solid #ffffff;
}

body.high-contrast .btn-secondary:hover {
  background-color: #121212;
  border-color: #93c5fd;
  color: #ffffff;
}

body.high-contrast .progress-bar-track {
  background-color: #27272a;
  border: 1px solid #ffffff;
}

body.high-contrast .progress-bar-fill {
  background-color: #60a5fa;
}

body.high-contrast .feedback-status.status-info {
  background-color: #0b192c;
  border: 2px solid var(--cor-primaria);
  color: #ffffff;
}

body.high-contrast .feedback-status.status-sucesso {
  background-color: #052e16;
  border: 2px solid #34d399;
  color: #ffffff;
}

body.high-contrast .feedback-status.status-aviso {
  background-color: #451a03;
  border: 2px solid #fbbf24;
  color: #ffffff;
}

body.high-contrast :focus-visible {
  outline: var(--anel-foco);
  outline-offset: 2px;
}

/* ==============================================================================
   Barra de Navegação Inferior Unificada (App Bottom Navigation Bar)
   WCAG 2.1 AA · Alvos de Toque >= 48px · Alto Contraste & Print Seguro
   ============================================================================== */
.app-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(420px, calc(100% - 16px));
  background-color: var(--cor-card);
  border-top: 1px solid var(--cor-borda);
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 4px 6px calc(4px + env(safe-area-inset-bottom, 0px));
  z-index: 100;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  margin-top: auto;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  min-width: 48px;
  padding: 6px 4px;
  text-decoration: none;
  color: var(--cor-texto-secundario);
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: var(--raio-botao);
  transition: all 0.15s ease;
  flex: 1;
  text-align: center;
}

.bottom-nav-item .nav-icon {
  font-size: 1.25rem;
  line-height: 1.2;
  margin-bottom: 2px;
}

.bottom-nav-item .nav-text {
  line-height: 1.1;
  white-space: nowrap;
}

.bottom-nav-item:hover {
  color: var(--cor-primaria);
  background-color: var(--cor-primaria-fundo);
}

.bottom-nav-item.active {
  color: var(--cor-primaria);
  font-weight: 700;
}

.bottom-nav-item:focus-visible {
  outline: var(--anel-foco);
  outline-offset: 2px;
}

/* Suporte Contextual a Alto Contraste (body.high-contrast) */
body.high-contrast .app-bottom-nav {
  background-color: #000000;
  border-top: 2px solid #ffffff;
  box-shadow: none;
}

body.high-contrast .bottom-nav-item {
  color: #ffffff;
}

body.high-contrast .bottom-nav-item:hover,
body.high-contrast .bottom-nav-item.active {
  color: #93c5fd;
  background-color: #1e3a8a;
  border: 1px solid #ffffff;
}

/* Ocultar na impressão */
@media print {
  .app-bottom-nav {
    display: none !important;
  }
}



/* Avisos de origem dos conteúdos (IHC). */
.origin-notice {
  margin: 1rem 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--cor-borda);
  border-left: 4px solid var(--cor-primaria);
  border-radius: var(--raio-borda);
  background: var(--cor-fundo-suave);
  color: var(--cor-texto-principal);
  font-size: 0.9rem;
}
.origin-notice p { margin-top: 0.4rem; }
.source-explanation { margin: 0.5rem 0 0.75rem; font-size: 0.85rem; }

/* Seta discreta para links que levam a outros sites. */
.external-arrow { display: inline-block; margin-inline-start: .3em; font-weight: 600; text-decoration: none; }
/* Identidade OBI compartilhada por todas as telas. */
.accessibility-bar {
  background: var(--cor-marca);
  border-bottom: 3px solid var(--cor-amarela);
  padding: 12px 16px;
  container-type: inline-size;
}
.brand-link {
  color: var(--cor-sobre-marca);
  gap: 8px;
  min-height: 48px;
  font-size: clamp(22.4px, 1.4rem, 26px);
}
.brand-link small { font-size: clamp(12px, .75rem, 14px); font-weight: 600; }
.brand-symbol { display: block; flex-shrink: 0; object-fit: contain; background: #fff; border-radius: 50%; }
.accessibility-controls { margin-left: auto; }
/* O limite em rem acompanha também o aumento da fonte do aplicativo. */
@container (max-width: 18rem) {
  .brand-link > span { display: flex; flex-direction: column; line-height: 1.1; gap: 3px; }
}
.accessibility-bar .btn-a11y { background: transparent; color: var(--cor-sobre-marca); border-color: #ffffff80; }
.accessibility-bar .btn-a11y:hover { background: #ffffff20; border-color: var(--cor-amarela); }
.accessibility-bar :focus-visible { outline-color: var(--cor-amarela); }
.page-header { background: var(--cor-fundo-suave); }
.brand-link, .home-footer-links a { min-height: var(--alvo-toque-minimo); }
@media (max-width: 440px) {
  body { padding: 0; }
  .mobile-viewport { border: 0; border-radius: 0; min-height: 100dvh; }
  .app-bottom-nav { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
body.high-contrast .accessibility-bar { background: #000; }

@media print {
  .mobile-viewport { padding-bottom: 0; }
}

/* Modal de saída para links externos, centralizado em qualquer tamanho de tela. */
.external-dialog {
  position: fixed;
  inset: 0;
  margin: auto;
  width: min(360px, calc(100% - 32px));
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
  padding: 22px;
  border: 1px solid var(--cor-borda);
  border-top: 3px solid var(--cor-primaria);
  border-radius: 16px;
  background: var(--cor-card);
  color: var(--cor-texto-principal);
  box-shadow: 0 24px 80px rgb(0 0 0 / 25%);
}
.external-dialog::backdrop { background: rgb(20 10 8 / 60%); }
.external-dialog h2 { font-size: 1.1rem; line-height: 1.3; margin-bottom: 8px; }
.external-dialog p { font-size: .875rem; line-height: 1.5; color: var(--cor-texto-secundario); }
.external-dialog-destination {
  margin-block: 12px 18px;
  padding: 10px 12px;
  background: var(--cor-fundo-suave);
  color: var(--cor-primaria);
  border-radius: 8px;
  overflow-wrap: anywhere;
  font-weight: 700;
}
.external-dialog-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.external-dialog-actions > :is(a, button) { flex: 1 1 100px; width: auto; min-height: 48px; padding: 10px 12px; gap: 6px; font-size: .875rem; border-radius: 8px; }
.external-dialog .external-dialog-destination { color: var(--cor-primaria); font-size: .8rem; }
body:has(.external-dialog[open]) { overflow: hidden; }
@media print { .external-dialog { display: none; } }