:root {
  --primary: #5B6FFF;
  --primary-dark: #4454d6;
  --bg: #F7F8FF;
  --card: #FFFFFF;
  --text: #1E293B;
  --muted: #64748B;
  --line: #E2E8F0;
  --success: #22C55E;
  --warn: #F59E0B;
  --danger: #DC2626;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, sans-serif;
}

html, body {
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

.startHidden {
  display: none !important;
}

.muted {
  color: var(--muted);
}

.hidden {
  display: none !important;
}

select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.filho-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: #6C5CE7;
}

.filho-card {
  width: 100%;
  max-width: 480px;
}

.quiz-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  margin-bottom: 10px;
  background: #fff;
}

.quiz-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.quiz-item .btn {
  margin-top: 8px;
}

.emoji {
  font-size: 48px;
  text-align: center;
  margin: 10px 0;
}

.progress-top {
  height: 10px;
  background: #E2E8F0;
  border-radius: 10px;
  overflow: hidden;
  margin: 12px 0;
}

.progress-top i {
  display: block;
  height: 100%;
  background: var(--primary);
  width: 0;
}

.alternativa {
  padding: 16px;
  border-radius: 14px;
  border: 3px solid var(--line);
  margin: 10px 0;
  cursor: pointer;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 12px;
}

.alternativa .letra {
  background: #E2E8F0;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.alternativa.correta {
  border-color: var(--success);
  background: #DCFCE7;
}

.alternativa.errada {
  border-color: var(--danger);
  background: #FEE2E2;
}

.nota-box {
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  background: #FEF3C7;
}

.alerta {
  margin-bottom: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  font-weight: 600;
}

.alerta.sucesso {
  background: #DCFCE7;
  color: #166534;
}

.alerta.erro {
  background: #FEE2E2;
  color: #991B1B;
}

.alerta.aviso {
  background: #FEF3C7;
  color: #92400E;
}

.acoes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.acoes .btn {
  width: auto;
  flex: 1;
  min-width: 90px;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.item-capitulo {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.item-capitulo .acoes {
  margin-top: 0;
  flex-shrink: 0;
}

/* ===== Header / App chrome ===== */
header {
  background: var(--card);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .05);
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 800;
  color: var(--primary);
  font-size: 24px;
}

.logo img {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 12px;
}

.logo span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.header-legal {
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

#userName {
  font-size: 14px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, .06);
}

.btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px 18px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: .2s;
}

.btn:hover {
  opacity: .9;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-small {
  width: auto;
  padding: 8px 12px;
  font-size: 13px;
}

.page {
  display: none;
  animation: fade .3s ease;
}

.page.active {
  display: block;
}

@keyframes fade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
}

nav button {
  white-space: nowrap;
  padding: 10px 16px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: white;
  cursor: pointer;
}

nav button.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

input, select {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  margin: 8px 0;
  background: #fff;
}

.stat {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
}

.progress {
  height: 8px;
  background: var(--line);
  border-radius: 10px;
  overflow: hidden;
  margin-top: 8px;
}

.progress i {
  display: block;
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: 1s;
  font-style: normal;
}

.nota-box {
  margin-top: 16px;
  background: #FEF3C7;
  padding: 12px;
  border-radius: 10px;
}

/* ===== Loading ===== */
.loading-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--muted);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--line);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

.loading-gif {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
  object-fit: contain;
}

.legal-body {
  min-height: 100vh;
}

.legal-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  max-width: 860px;
  margin: 0 auto;
}

.legal-top .logo {
  text-decoration: none;
  color: inherit;
}

.legal-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.legal-links a {
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.legal-wrap {
  max-width: 800px;
  margin: 0 auto 40px;
  padding: 28px 24px;
}

.legal-wrap h1 {
  margin: 8px 0 16px;
  font-size: 28px;
}

.legal-wrap h2 {
  margin: 22px 0 8px;
  font-size: 18px;
}

.legal-wrap p,
.legal-wrap li {
  line-height: 1.55;
  color: var(--text);
}

.legal-wrap ul {
  padding-left: 20px;
  margin: 8px 0 12px;
}

.legal-wrap a {
  color: var(--primary);
}

.legal-footer,
.auth-legal {
  margin-top: 16px;
  text-align: center;
  font-size: 13px;
}

.auth-legal a,
.legal-footer a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.envio-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: rgba(247, 248, 255, 0.86);
  color: var(--muted);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Login ===== */
.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--card);
  border-radius: 20px;
  padding: 28px 24px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .06);
}

.brand {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 24px;
}

.logo-icon {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
}

.logo-icon img {
  width: 72px;
  height: 72px;
  border-radius: 16px;
}

.logo-text {
  min-width: 0;
}

.logo-text strong {
  display: block;
  color: var(--primary);
  font-size: 22px;
  line-height: 1.2;
}

.logo-text span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--muted);
  font-weight: 400;
}

#authFormTitle {
  margin-bottom: 12px;
  font-size: 18px;
}

.auth-error {
  color: var(--danger);
  font-size: 13px;
  margin: 4px 0 8px;
}

.link-btn {
  border: none;
  background: none;
  color: var(--primary);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

#passwordReset,
#register,
#access {
  margin-top: 12px;
  font-size: 14px;
  color: var(--muted);
}

.social-login {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
}

.social-divider {
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

.google-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px 16px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
}

.google-button img {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.google-button:hover {
  background: #f8fafc;
}

.paginas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
}

.pagina-thumb {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px;
  text-align: center;
}

.pagina-thumb canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  background: #f8fafc;
}

.pagina-thumb span {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}

#progressFeedback {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  box-shadow: 0 8px 24px rgba(20, 30, 50, .12);
  z-index: 20;
}

#progressFeedback p {
  font-size: 12px;
  margin-bottom: 8px;
}

#progressFeedback progress {
  width: 220px;
}

.quiz-filhos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.quiz-filho-col {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  background: #F8F9FF;
  min-height: 180px;
}

.quiz-filho-col h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.quiz-lote {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  margin-top: 10px;
}

@media (max-width: 900px) {
  .quiz-filhos-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr; }
  header { flex-direction: column; align-items: stretch; gap: 10px; }
  .header-user { justify-content: space-between; }
  #userName { max-width: none; }
}