/* Oxford — Material Gratuito
   CSS autossuficiente (não depende de oxford-core inline styles).
   Paleta oficial Oxford + classes próprias .mat-*.
   ----------------------------------------------------------------------- */

:root {
  /* Paleta Oxford */
  --ox-red: #e63946;
  --ox-red-dark: #c62f3b;
  --ox-cyan: #a8dadc;
  --ox-blue: #457b9d;
  --ox-blue-dark: #1d3557;
  --ox-cream: #f1faee;
  --ox-green: #22c55e;
  --ox-green-dark: #16a34a;
  --ox-white: #ffffff;
  --ox-gray-50: #f9fafb;
  --ox-gray-100: #f3f4f6;
  --ox-gray-200: #e5e7eb;
  --ox-gray-300: #d1d5db;
  --ox-gray-500: #6b7280;
  --ox-gray-700: #374151;
  --ox-gray-900: #111827;

  --ox-font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --ox-font-display: 'Poppins', var(--ox-font-main);

  --ox-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --ox-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --ox-shadow-lg: 0 8px 24px rgba(29, 53, 87, 0.12);

  --mat-bg-soft: #f6f8fb;
  --mat-citacao-bg: #eaf2fb;
  --mat-citacao-border: var(--ox-blue-dark);
  --mat-prof-bg: #fff7e6;
  --mat-prof-border: #d97706;
  --mat-prof-action-bg: #ecfdf5;
  --mat-prof-action-border: #059669;
  --mat-prof-watch-bg: #fef2f2;
  --mat-prof-watch-border: #b91c1c;
}

/* ============================================================
   BASE (classes ox-* mínimas duplicadas do core, autossuficientes)
   ============================================================ */

.ox-container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.2rem;
  box-sizing: border-box;
}

.ox-section {
  padding: 2.5rem 0;
}

.ox-card {
  background: var(--ox-white);
  border-radius: 14px;
  box-shadow: var(--ox-shadow-md);
  padding: 1.5rem;
}

.ox-badge {
  display: inline-block;
  padding: .3em .85em;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  background: var(--ox-gray-100);
  color: var(--ox-gray-700);
  line-height: 1.4;
}
.ox-badge-red   { background: var(--ox-red);   color: #fff; }
.ox-badge-cyan  { background: var(--ox-cyan);  color: var(--ox-blue-dark); }
.ox-badge-blue  { background: var(--ox-blue);  color: #fff; }
.ox-mb-sm { margin-bottom: .5rem; }
.ox-mb-md { margin-bottom: 1rem; }
.ox-mb-lg { margin-bottom: 1.5rem; }

.ox-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4em;
  padding: .75em 1.4em;
  border-radius: 8px;
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  min-height: 48px;
}
.ox-btn:hover { transform: translateY(-1px); box-shadow: var(--ox-shadow-md); }
.ox-btn:focus-visible { outline: 3px solid var(--ox-cyan); outline-offset: 2px; }
.ox-btn-primary   { background: var(--ox-blue-dark); color: #fff; }
.ox-btn-primary:hover { background: var(--ox-blue); color: #fff; }
.ox-btn-secondary { background: var(--ox-gray-100); color: var(--ox-blue-dark); border-color: var(--ox-gray-200); }
.ox-btn-secondary:hover { background: var(--ox-gray-200); }
.ox-btn-lg        { padding: .95em 1.7em; font-size: 1.05rem; min-height: 52px; }
.ox-btn-sm        { padding: .55em 1em; font-size: .9rem; min-height: 40px; }

/* Reset light pro body — só dentro dos containers (.mat-*) pra não vazar */
.mat-aula, .mat-login, .mat-bloqueio, .mat-erro {
  font-family: var(--ox-font-main);
  color: var(--ox-gray-900);
}

/* ============================================================
   TOPBAR (logo Oxford no topo de cada página)
   ============================================================ */

.mat-topbar {
  background: var(--ox-white);
  border-bottom: 1px solid var(--ox-gray-200);
  padding: .8rem 0;
  box-shadow: var(--ox-shadow-sm);
}
.mat-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.mat-topbar-logo img {
  display: block;
  height: 40px;
  width: auto;
}
.mat-topbar-tag {
  font-size: .8rem;
  font-weight: 600;
  color: var(--ox-blue-dark);
  text-transform: uppercase;
  letter-spacing: .06em;
  text-align: right;
}
.mat-topbar-professor { border-bottom-color: var(--mat-prof-border); }
.mat-topbar-professor .mat-topbar-tag { color: var(--mat-prof-border); }
@media (max-width: 480px) {
  .mat-topbar-tag { font-size: .7rem; }
  .mat-topbar-logo img { height: 32px; }
}

/* ============================================================
   HERO (capa da aula)
   ============================================================ */

.mat-hero {
  background: linear-gradient(135deg, var(--ox-blue-dark) 0%, var(--ox-blue) 100%);
  color: #fff;
  padding: 3.5em 0 3em;
  font-family: var(--ox-font-main);
}
.mat-hero h1 {
  font-size: clamp(1.8rem, 6vw, 2.6rem);
  line-height: 1.18;
  color: #fff;
  margin: .3em 0 .5em;
  font-family: var(--ox-font-display);
  font-weight: 700;
}
.mat-hero-sub { font-size: 1.1rem; opacity: .92; margin: 0; }
.mat-saudacao { display: inline-block; color: #ffd166; font-weight: 700; }

/* ============================================================
   AULA — corpo do conteúdo
   ============================================================ */

.mat-narrow { max-width: 720px; margin: 0 auto; }

.mat-aula h2 {
  margin: 2.2em 0 .5em;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  line-height: 1.25;
  font-family: var(--ox-font-display);
  color: var(--ox-blue-dark);
}
.mat-aula h3 {
  margin: 1.6em 0 .4em;
  font-size: clamp(1.1rem, 3vw, 1.3rem);
  color: var(--ox-blue-dark);
  font-family: var(--ox-font-display);
}
.mat-aula p  { font-size: 1.05rem; line-height: 1.7; margin: 0 0 1em; }
.mat-aula ul { line-height: 1.7; padding-left: 1.2em; }
.mat-aula li { margin-bottom: .5em; }
.mat-aula a  { color: var(--ox-blue); text-decoration: underline; }
.mat-aula strong { color: var(--ox-gray-900); }

.mat-lead {
  font-size: 1.15rem !important;
  line-height: 1.6 !important;
  border-left: 3px solid var(--ox-blue-dark);
  padding: .2em 0 .2em 1em;
  color: var(--ox-gray-700);
}

/* Citação científica */
.mat-citacao {
  display: flex;
  gap: .9em;
  background: var(--mat-citacao-bg);
  border-left: 4px solid var(--mat-citacao-border);
  border-radius: 8px;
  padding: 1em 1.2em;
  margin: 1.5em 0;
}
.mat-citacao-icone { flex: 0 0 24px; color: var(--mat-citacao-border); padding-top: .15em; }
.mat-citacao-rotulo {
  display: block;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--mat-citacao-border);
  font-weight: 700;
  margin-bottom: .3em;
}
.mat-citacao p { margin: 0; font-size: .95rem; line-height: 1.55; }
.mat-citacao-resumo { color: var(--ox-gray-500); font-style: italic; }

/* Checklist visual */
.mat-checklist { list-style: none; padding: 0; margin: 1em 0; }
.mat-checklist li {
  position: relative;
  padding: .6em 0 .6em 2em;
  border-bottom: 1px dashed var(--ox-gray-200);
}
.mat-checklist li::before {
  content: "✓";
  position: absolute;
  left: 0; top: .55em;
  width: 1.4em; height: 1.4em;
  background: var(--ox-green);
  color: #fff;
  border-radius: 50%;
  text-align: center;
  font-weight: 700;
  font-size: .85em;
  line-height: 1.4em;
}

.mat-ferramentas { padding-left: 0; list-style: none; }
.mat-ferramentas li {
  padding: .8em 1em;
  background: var(--mat-bg-soft);
  border-radius: 8px;
  margin-bottom: .7em;
}

/* Caixa de exercício */
.mat-exercicio {
  margin: 2.5em 0;
  border: 2px solid #ffd166;
  background: #fffbeb;
  padding: 1.6em;
  border-radius: 14px;
  box-shadow: var(--ox-shadow-md);
}
.mat-exercicio-header h2 { margin: .3em 0 1em; font-size: 1.5rem; color: var(--ox-gray-900); }
.mat-exercicio-missao { font-size: 1.05rem; line-height: 1.7; }
.mat-exercicio-missao p { margin: 0 0 .8em; }
.mat-exercicio-acoes { display: flex; flex-wrap: wrap; gap: .6em; margin: 1em 0; }
.mat-exercicio-instrucao { font-size: .95rem; color: var(--ox-gray-500); font-style: italic; }

.mat-form-group { margin-bottom: 1em; }
.mat-form-group label { display: block; font-weight: 600; margin-bottom: .3em; font-size: .95rem; }
.mat-form-group input,
.mat-form-group textarea {
  width: 100%;
  padding: .7em .9em;
  border: 1px solid var(--ox-gray-300);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.45;
  background: #fff;
  box-sizing: border-box;
}
.mat-form-group textarea { resize: vertical; min-height: 90px; }
.mat-form-group input:focus,
.mat-form-group textarea:focus {
  outline: 2px solid var(--ox-blue-dark);
  outline-offset: 1px;
  border-color: var(--ox-blue-dark);
}
.mat-required { color: var(--ox-red); margin-left: .2em; }
.mat-field-help { display: block; font-size: .8rem; color: var(--ox-gray-500); margin-top: .25em; }

.mat-exercicio-submit { margin-top: 1.2em; }
.mat-exercicio-feedback {
  margin-top: .7em;
  min-height: 1.4em;
  font-weight: 600;
  font-size: .95rem;
}
.mat-exercicio-feedback.is-success { color: var(--ox-green-dark); }
.mat-exercicio-feedback.is-error   { color: var(--ox-red-dark); }

/* Encerramento / gancho próxima aula */
.mat-encerramento {
  margin-top: 3em;
  padding: 1.8em 1.5em;
  background: var(--ox-blue-dark);
  color: #fff;
  border-radius: 14px;
}
.mat-encerramento h2 { color: #ffd166; margin-top: 0; }
.mat-encerramento p { font-size: 1.05rem; color: #f1faee; }
.mat-encerramento strong { color: #fff; }
.mat-encerramento-cta { font-size: 1.2rem !important; font-weight: 600; margin-top: 1em !important; }

/* ============================================================
   TELA DE BLOQUEIO (Aula 2 não liberada)
   ============================================================ */

.mat-bloqueio { padding: 4em 0; background: var(--mat-bg-soft); min-height: 60vh; }
.mat-bloqueio-card { padding: 2.5em 1.8em; text-align: center; box-shadow: var(--ox-shadow-lg); }
.mat-bloqueio-icone { color: var(--ox-blue-dark); margin-bottom: 1em; }
.mat-bloqueio-sub { color: var(--ox-gray-700); font-size: 1.05rem; }

.mat-contador {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .6em;
  margin: 1.8em 0;
}
.mat-contador-bloco {
  background: var(--ox-blue-dark);
  color: #fff;
  padding: 1em .5em;
  border-radius: 8px;
}
.mat-contador-num {
  display: block;
  font-size: clamp(1.5rem, 7vw, 2.4rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.mat-contador-rotulo { font-size: .75rem; opacity: .85; text-transform: uppercase; letter-spacing: .05em; }

.mat-spoiler {
  text-align: left;
  background: var(--mat-bg-soft);
  padding: 1em 1.2em;
  border-radius: 8px;
  margin: 1.5em 0;
}
.mat-spoiler ul { margin: .5em 0 0; }
.mat-bloqueio-acoes { display: flex; flex-wrap: wrap; gap: .8em; justify-content: center; margin-top: 1em; }

/* ============================================================
   TELA DE ERRO
   ============================================================ */

.mat-erro { padding: 4em 0; background: var(--mat-bg-soft); min-height: 60vh; }
.mat-erro .ox-card { padding: 2em; text-align: center; }
.mat-erro h1 { color: var(--ox-blue-dark); font-family: var(--ox-font-display); }

/* ============================================================
   LOGIN (digite seu WhatsApp)
   ============================================================ */

.mat-login { padding: 3em 0; background: var(--mat-bg-soft); min-height: 60vh; font-family: var(--ox-font-main); }
.mat-login-card {
  padding: 2em;
  text-align: left;
  max-width: 520px;
  margin: 0 auto;
}
.mat-login-card h1 {
  font-size: clamp(1.4rem, 4vw, 1.85rem);
  line-height: 1.25;
  margin: .3em 0 .4em;
  font-family: var(--ox-font-display);
  color: var(--ox-blue-dark);
}
.mat-login-sub { color: var(--ox-gray-700); font-size: 1rem; margin-bottom: 1.4em; }
.mat-login-feedback {
  margin-top: .7em;
  min-height: 1.4em;
  font-weight: 600;
  font-size: .95rem;
}
.mat-login-feedback.is-success { color: var(--ox-green-dark); }
.mat-login-feedback.is-error   { color: var(--ox-red-dark); }

/* ============================================================
   VERSÃO PROFESSOR
   ============================================================ */

.mat-professor-banner {
  background: var(--mat-prof-border);
  color: #fff;
  padding: .7em 1em;
  text-align: center;
  font-size: .9rem;
}
.mat-professor-banner strong { color: #fff7e6; }

.mat-prof-bloco {
  margin: 1.2em 0;
  border-radius: 10px;
  padding: 1em 1.2em;
  border-left: 4px solid;
}
.mat-prof-bloco-rotulo {
  display: inline-block;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 700;
  margin-bottom: .5em;
  padding: .2em .7em;
  border-radius: 999px;
  color: #fff;
}
.mat-prof-porque   { background: var(--mat-prof-bg); border-left-color: var(--mat-prof-border); }
.mat-prof-porque   .mat-prof-bloco-rotulo { background: var(--mat-prof-border); }
.mat-prof-como     { background: var(--mat-prof-action-bg); border-left-color: var(--mat-prof-action-border); }
.mat-prof-como     .mat-prof-bloco-rotulo { background: var(--mat-prof-action-border); }
.mat-prof-observar { background: var(--mat-prof-watch-bg); border-left-color: var(--mat-prof-watch-border); }
.mat-prof-observar .mat-prof-bloco-rotulo { background: var(--mat-prof-watch-border); }
.mat-prof-bloco p { margin: .3em 0; font-size: .98rem; line-height: 1.55; }
.mat-prof-bloco ul { margin: .3em 0 .3em 1.2em; padding: 0; }

/* ============================================================
   PREVIEW DO ALUNO (visto pelo professor)
   ============================================================ */

.mat-preview-aluno {
  margin: 1.8em 0;
  background: #fff;
  border: 2px dashed #94a3b8;
  border-radius: 12px;
  overflow: hidden;
}
.mat-preview-aluno-header {
  background: #1d3557;
  color: #fff;
  padding: .55em 1em;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .04em;
  display: flex;
  align-items: center;
  gap: .5em;
  flex-wrap: wrap;
}
.mat-preview-aluno-icone { font-size: 1.1em; }
.mat-preview-aluno-rotulo { text-transform: uppercase; }
.mat-preview-aluno-titulo { opacity: .85; font-weight: 500; text-transform: none; }
.mat-preview-aluno-corpo {
  padding: 1.2em 1.4em;
  background: #fafbfc;
}
.mat-preview-aluno-corpo > *:first-child { margin-top: 0; }
.mat-preview-aluno-corpo > *:last-child  { margin-bottom: 0; }
.mat-preview-aluno-corpo h2:first-child,
.mat-preview-aluno-corpo h3:first-child { margin-top: .2em; }

/* ============================================================
   ADMIN
   ============================================================ */

.mat-admin-tokens table { width: 100%; border-collapse: collapse; background: #fff; }
.mat-admin-tokens th, .mat-admin-tokens td {
  padding: .7em;
  border-bottom: 1px solid var(--ox-gray-200);
  text-align: left;
  font-size: .92rem;
}
.mat-admin-tokens th { background: var(--mat-bg-soft); font-weight: 600; }
.mat-admin-tokens .mat-link-cell input {
  width: 100%;
  font-family: monospace;
  font-size: .82rem;
  padding: .35em .5em;
}

/* ============================================================
   RESPONSIVO + ACESSIBILIDADE
   ============================================================ */

@media (max-width: 720px) {
  .mat-hero { padding: 2.5em 0 2em; }
  .mat-exercicio { padding: 1.3em; }
  .mat-encerramento { padding: 1.5em 1.3em; }
  .mat-contador { gap: .4em; }
  .mat-contador-bloco { padding: .7em .3em; }
  .mat-login-card { padding: 1.6em 1.3em; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .mat-contador-num { transition: none; }
}

/* Print — só caixa de exercício */
@media print {
  body * { visibility: hidden; }
  .mat-exercicio-print-area, .mat-exercicio-print-area * { visibility: visible; }
  .mat-exercicio-print-area {
    position: absolute;
    left: 0; top: 0;
    width: 100%;
    border: none;
    box-shadow: none;
    background: #fff !important;
  }
  .mat-no-print { display: none !important; }
}