/* ============================================================
   RPR ACADEMY — style.css
   Sistema de design global, sem CSS separado por feature
   ============================================================ */

/* ── RESET & BASE ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow: hidden;
}

/* ── DESIGN TOKENS ── */
:root {
  --bg:            #0f172a;
  --bg-2:          #1e293b;
  --bg-3:          #162032;
  --card:          #1e2d3e;
  --card-hover:    #243447;
  --border:        rgba(56, 189, 248, 0.1);
  --border-strong: rgba(56, 189, 248, 0.25);

  --primary:       #38bdf8;
  --primary-dim:   rgba(56, 189, 248, 0.15);
  --primary-glow:  rgba(56, 189, 248, 0.35);
  --primary-dark:  #0ea5e9;

  --accent:        #818cf8;
  --accent-dim:    rgba(129, 140, 248, 0.15);
  --success:       #34d399;
  --warning:       #fbbf24;
  --danger:        #f87171;

  --text:          #e2e8f0;
  --text-2:        #94a3b8;
  --text-3:        #64748b;
  --text-inv:      #0f172a;

  --sidebar-w:     260px;
  --radius:        12px;
  --radius-sm:     8px;
  --radius-lg:     18px;

  --shadow-card:   0 4px 24px rgba(0,0,0,0.35);
  --shadow-glow:   0 0 32px rgba(56, 189, 248, 0.15);

  --transition:    0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  --font-display:  'Syne', sans-serif;
  --font-body:     'DM Sans', sans-serif;
  --font-mono:     'JetBrains Mono', monospace;
}

/* ── UTILITÁRIOS ── */
.oculto { display: none !important; }
.app--oculto { display: none !important; }

/* ── TELA INICIAL ── */
.tela-inicial {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.tela-inicial.saindo {
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
}

.tela-inicial__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.tela-inicial__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(56,189,248,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.tela-inicial__glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(56,189,248,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.tela-inicial__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
  max-width: 560px;
  width: 100%;
  margin: 0 auto; /* 🔥 ISSO CENTRALIZA DE VERDADE */
  animation: fadeInUp 0.7s ease both;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tela-inicial__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 2.5rem;
}

.tela-inicial__logo-sigla {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  color: var(--primary);
  text-transform: uppercase;
}

.tela-inicial__logo-sep {
  width: 1px;
  height: 20px;
  background: var(--border-strong);
}

.tela-inicial__logo-nome {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text-2);
  letter-spacing: 0.05em;
}

.tela-inicial__titulo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.5rem;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;

  white-space: nowrap;

  text-align: center;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.tela-inicial__titulo em {
  font-style: normal;
  color: var(--primary);
}

.tela-inicial__subtitulo {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 3rem;
}

.tela-inicial__botoes {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── BOTÕES ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--hero {
  flex-direction: column;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.8rem;
  min-width: 190px;
  text-align: left;
  position: relative;
  overflow: hidden;
}

.btn--hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-dim) 0%, transparent 60%);
  opacity: 0;
  transition: var(--transition);
}

.btn--hero:hover::before { opacity: 1; }
.btn--hero:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.btn--hero-secundario::before {
  background: linear-gradient(135deg, var(--accent-dim) 0%, transparent 60%);
}

.btn--hero-secundario:hover {
  border-color: var(--accent);
  box-shadow: 0 0 32px rgba(129,140,248,0.15);
}

.btn__icon {
  font-size: 1.6rem;
  margin-bottom: 4px;
  display: block;
}

.btn__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  display: block;
}

.btn__sub {
  font-size: 0.78rem;
  color: var(--text-3);
  display: block;
  margin-top: 2px;
}

/* Botões normais */
.btn--primary {
  background: var(--primary);
  color: var(--text-inv);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.4rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.btn--primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(56,189,248,0.3);
}

.btn--ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 1.2rem;
  font-size: 0.88rem;
}

.btn--ghost:hover {
  border-color: var(--border-strong);
  color: var(--text);
  background: var(--primary-dim);
}

.btn--danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid rgba(248,113,113,0.2);
  border-radius: var(--radius-sm);
  padding: 0.55rem 1.2rem;
  font-size: 0.88rem;
}

.btn--danger:hover {
  background: rgba(248,113,113,0.1);
  border-color: var(--danger);
}

.btn--sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.82rem;
  border-radius: 6px;
}

.btn--icon-only {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn--icon-only:hover {
  border-color: var(--border-strong);
  color: var(--primary);
  background: var(--primary-dim);
}

/* ── APP LAYOUT ── */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: 100vh;
  width: 100vw;
  opacity: 1;
  transition: opacity var(--transition-slow);
}

.app.entrando {
  animation: appEntrar 0.4s ease both;
}

@keyframes appEntrar {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── SIDEBAR ── */
.sidebar {
  background: var(--bg-3);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  position: relative;
}

.sidebar::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, transparent, var(--primary-glow) 40%, transparent);
  opacity: 0.5;
  pointer-events: none;
}

.sidebar__header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 1.1rem 1rem;
  border-bottom: 1px solid var(--border);
}

.sidebar__voltar {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.sidebar__voltar:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-dim);
}

.sidebar__marca {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.sidebar__marca-sigla {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--primary);
  letter-spacing: 0.1em;
}

.sidebar__marca-nome {
  font-size: 0.7rem;
  color: var(--text-3);
}

.sidebar__modo-tag {
  margin: 0.75rem 1rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.sidebar__nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar__nav::-webkit-scrollbar { width: 4px; }
.sidebar__nav::-webkit-scrollbar-track { background: transparent; }
.sidebar__nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.sidebar__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.62rem 0.9rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  color: var(--text-2);
  border: 1px solid transparent;
  position: relative;
}

.sidebar__item:hover {
  background: var(--primary-dim);
  color: var(--text);
  border-color: var(--border);
}

.sidebar__item.ativo {
  background: var(--primary-dim);
  color: var(--primary);
  border-color: var(--border-strong);
  font-weight: 500;
}

.sidebar__item.ativo::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}

.sidebar__item-icon {
  font-size: 1rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar__item-label {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__item-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: var(--primary-dim);
  color: var(--primary);
  padding: 1px 6px;
  border-radius: 20px;
  border: 1px solid var(--border-strong);
}

.sidebar__secao-titulo {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.8rem 0.9rem 0.3rem;
}

.sidebar__footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
}

.sidebar__versao {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
}

/* ── ÁREA DE CONTEÚDO ── */
.conteudo-principal {
  overflow-y: auto;
  height: 100vh;
  background: var(--bg);
}

.conteudo-principal::-webkit-scrollbar { width: 6px; }
.conteudo-principal::-webkit-scrollbar-track { background: transparent; }
.conteudo-principal::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.conteudo-view {
  padding: 2.5rem 2.5rem 4rem;
  max-width: 960px;
  animation: viewEntrar 0.3s ease both;
}

@keyframes viewEntrar {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── CARD ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
}

.card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card);
}

.card--destaque {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-glow);
}

.card--clicavel {
  cursor: pointer;
}

.card--clicavel:hover {
  background: var(--card-hover);
  transform: translateY(-2px);
}

/* ── PAGE HEADER ── */
.page-header {
  margin-bottom: 2rem;
}

.page-header__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: block;
}

.page-header__titulo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-header__desc {
  margin-top: 0.5rem;
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ── LISTA DE CONTEÚDOS ── */
.conteudo-lista {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.conteudo-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: var(--transition);
}

.conteudo-item:hover {
  background: var(--card-hover);
  border-color: var(--border-strong);
  transform: translateX(4px);
}

.conteudo-item__tipo-badge {
  flex-shrink: 0;
  padding: 0.25rem 0.7rem;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  white-space: nowrap;
}

.tipo-atividade  { background: rgba(52,211,153,0.12); color: var(--success); border: 1px solid rgba(52,211,153,0.2); }
.tipo-conteudo   { background: rgba(56,189,248,0.12); color: var(--primary); border: 1px solid var(--border-strong); }
.tipo-material   { background: rgba(251,191,36,0.12);  color: var(--warning); border: 1px solid rgba(251,191,36,0.2); }
.tipo-simulado   { background: rgba(129,140,248,0.12); color: var(--accent);  border: 1px solid rgba(129,140,248,0.2); }

.conteudo-item__info {
  flex: 1;
  min-width: 0;
}

.conteudo-item__titulo {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conteudo-item__meta {
  font-size: 0.78rem;
  color: var(--text-3);
  margin-top: 2px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.conteudo-item__meta-sep {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-3);
  display: inline-block;
}

.conteudo-item__acoes {
  flex-shrink: 0;
}

/* ── DETALHE DO CONTEÚDO ── */
.detalhe {
  max-width: 720px;
}

.detalhe__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.detalhe__voltar {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
}

.detalhe__voltar:hover {
  border-color: var(--border-strong);
  color: var(--primary);
  background: var(--primary-dim);
}

.detalhe__corpo {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.detalhe__titulo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.detalhe__meta-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.detalhe__meta-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 8px;
  letter-spacing: 0.05em;
}

.detalhe__descricao {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 2rem;
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
}

/* ── SIMULADO / QUESTÕES ── */
.simulado {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.simulado__titulo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.questao {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.questao__enunciado {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.65;
  margin-bottom: 1rem;
  font-weight: 500;
}

.questao__numero {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--primary);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.alternativas {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.alternativa {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  color: var(--text-2);
  background: var(--bg-3);
}

.alternativa:hover {
  border-color: var(--primary);
  color: var(--text);
  background: var(--primary-dim);
}

.alternativa.selecionada {
  border-color: var(--primary);
  background: var(--primary-dim);
  color: var(--primary);
}

.alternativa.correta {
  border-color: var(--success);
  background: rgba(52,211,153,0.1);
  color: var(--success);
}

.alternativa.incorreta {
  border-color: var(--danger);
  background: rgba(248,113,113,0.1);
  color: var(--danger);
}

.alternativa__letra {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.8rem;
  flex-shrink: 0;
  width: 18px;
  text-align: center;
  margin-top: 1px;
}

.simulado__acoes {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  align-items: center;
}

.simulado__placar {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-2);
  padding: 0.5rem 1rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.simulado__placar strong {
  color: var(--primary);
}

/* ── ÁREA DE PROFESSORES ── */
.prof-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}

.select-custom {
  appearance: none;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 0.55rem 2rem 0.55rem 0.9rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
}

.select-custom:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-dim);
}

.input-custom {
  appearance: none;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  width: 100%;
}

.input-custom:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-dim);
}

.input-custom::placeholder { color: var(--text-3); }

/* ── GERADOR IA ── */
.ia-card {
  background: linear-gradient(135deg, var(--bg-3), var(--card));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 2rem;
  position: relative;
  overflow: hidden;
}

.ia-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
}

.ia-card__titulo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.3rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ia-card__sub {
  font-size: 0.8rem;
  color: var(--text-3);
  margin-bottom: 1rem;
}

.ia-card__form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.textarea-custom {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 0.75rem 1rem;
  resize: vertical;
  min-height: 80px;
  transition: var(--transition);
  line-height: 1.6;
  width: 100%;
}

.textarea-custom:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-dim);
}

.textarea-custom::placeholder { color: var(--text-3); }

.ia-card__resultado {
  margin-top: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.7;
  white-space: pre-wrap;
  display: none;
}

.ia-card__resultado.visivel {
  display: block;
  animation: viewEntrar 0.3s ease both;
}

/* ── ÁREA ALUNOS ── */
.alunos-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  gap: 1rem;
}

.alunos-hero__emoji {
  font-size: 4rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

.alunos-hero__titulo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text);
}

.alunos-hero__sub {
  color: var(--text-2);
  font-size: 0.95rem;
  max-width: 360px;
  line-height: 1.65;
}

/* ── JOGOS ── */
.jogos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.jogo-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.jogo-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-dim), transparent);
  opacity: 0;
  transition: var(--transition);
}

.jogo-card:hover::before { opacity: 1; }
.jogo-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.jogo-card__emoji {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 0.75rem;
}

.jogo-card__nome {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  display: block;
  margin-bottom: 4px;
}

.jogo-card__desc {
  font-size: 0.78rem;
  color: var(--text-3);
  display: block;
}

/* ── JOGO AREA (onde o módulo de jogo renderiza) ── */
.jogo-area {
  max-width: 800px;
}

/* ── LOADING ── */
.loading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-3);
  font-size: 0.88rem;
  padding: 2rem 0;
}

.loading__spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

/* ── ESTADO VAZIO ── */
.estado-vazio {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-3);
}

.estado-vazio__icone {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
  opacity: 0.5;
}

.estado-vazio__titulo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-2);
  margin-bottom: 0.4rem;
}

.estado-vazio__desc {
  font-size: 0.85rem;
  line-height: 1.65;
}

/* ── ERRO ── */
.aviso-erro {
  background: rgba(248,113,113,0.07);
  border: 1px solid rgba(248,113,113,0.2);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  color: var(--danger);
  font-size: 0.88rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.aviso-erro__icone {
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── DIVISOR ── */
.divisor {
  height: 1px;
  background: var(--border);
  margin: 1.5rem 0;
}

/* ── CHIP TAGS ── */
.chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.chip {
  padding: 4px 10px;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  border: 1px solid var(--border);
  color: var(--text-3);
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-2);
}

.chip:hover, .chip.ativo {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-dim);
}

/* ── GRID 2 COLUNAS ── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ── RESPONSIVIDADE ── */
@media (max-width: 768px) {
  :root { --sidebar-w: 220px; }

  .conteudo-view { padding: 1.5rem 1.25rem 3rem; }

  .tela-inicial__botoes { gap: 0.75rem; }
  .btn--hero { min-width: 160px; padding: 1.2rem 1.4rem; }

  .grid-2 { grid-template-columns: 1fr; }

  /* Título da tela inicial: permite quebra de linha no mobile */
  .tela-inicial__titulo {
    white-space: normal;
    font-size: 1.75rem;
    word-break: keep-all;      /* não quebra dentro de palavras com hífen */
    overflow-wrap: break-word;
  }
}

/* (bloco anterior de 560px removido — substituído pelo sistema mobile abaixo) */


/* ── FOOTER FIXO GLOBAL ── */
.rodape-fixo {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 0.35rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
  line-height: 1;
}

.rodape-fixo__link {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
  font-size: 0.6rem;
}

.rodape-fixo__link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Espaço para o conteúdo não ficar escondido atrás do rodapé */
.tela-inicial__content { padding-bottom: 2.5rem; }
.conteudo-view { padding-bottom: 4rem; }

/* ── ARQUIVO EMBED (Google Drive iframe) ── */
.arquivo-embed {
  margin-top: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-2);
}

.arquivo-embed__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

.arquivo-embed__titulo {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-2);
  letter-spacing: 0.04em;
}

.arquivo-embed__iframe {
  width: 100%;
  height: 520px;
  border: none;
  display: block;
  background: var(--bg);
}

@media (max-width: 600px) {
  .arquivo-embed__iframe { height: 340px; }
}

/* ══════════════════════════════════════════════════════
   CAÇA-PALAVRAS — cp-*
   ══════════════════════════════════════════════════════ */

/* Tela de seleção de nível */
.cp-titulo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  margin: 0 0 0.25rem;
}

.cp-sub {
  font-size: 0.95rem;
  color: var(--text-2);
  margin: 0 0 1.75rem;
}

.cp-niveis-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}

.cp-nivel-card {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1rem 1.1rem;
  background: var(--bg-2);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.18s, transform 0.15s, box-shadow 0.18s;
  position: relative;
  overflow: hidden;
}

.cp-nivel-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--nivel-cor, var(--accent));
  border-radius: 3px 0 0 3px;
}

.cp-nivel-card:hover {
  border-color: var(--nivel-cor, var(--accent));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

.cp-nivel-emoji {
  font-size: 1.4rem;
  line-height: 1;
  margin-bottom: 0.15rem;
}

.cp-nivel-nome {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--nivel-cor, var(--accent));
}

.cp-nivel-desc {
  font-size: 0.8rem;
  color: var(--text-2);
}

.cp-nivel-info {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-3, var(--text-2));
}

/* Tela de jogo */
.cp-wrap {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;
}

.cp-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.cp-toolbar-titulo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  flex: 1;
}

.cp-stat {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-2);
  background: var(--bg-2);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.cp-jogo-wrap {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: start;
}

@media (max-width: 700px) {
  .cp-jogo-wrap { grid-template-columns: 1fr; }
}

.cp-grid-outer {
  overflow: auto;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-2);
}

.cp-grid {
  display: grid;
  user-select: none;
  padding: 0.5rem;
  gap: 2px;
}

.cp-celula {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}

.cp-celula.selecionada {
  background: var(--accent);
  color: #fff;
}

.cp-celula.encontrada {
  background: #22c55e22;
  color: #4ade80;
}

.cp-painel {
  min-width: 150px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem;
}

.cp-painel-titulo {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.cp-lista-palavras {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.cp-palavra-item {
  font-size: 0.82rem;
  color: var(--text);
  font-family: var(--font-mono);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  transition: color 0.2s;
}

.cp-palavra-item.achada {
  text-decoration: line-through;
  color: #4ade80;
  background: #22c55e15;
}

/* Tela de vitória */
.cp-vitoria {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem 1rem;
  text-align: center;
}

.cp-vitoria-emoji {
  font-size: 3.5rem;
}

.cp-vitoria-titulo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
}

.cp-vitoria-stats {
  display: flex;
  gap: 1.5rem;
  margin: 0.5rem 0;
}

.cp-vitoria-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.cp-vitoria-stat-valor {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
}

.cp-vitoria-stat-label {
  font-size: 0.75rem;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cp-vitoria-btns {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ══════════════════════════════════════════════════════
   COMPLEMENTOS — classes usadas nos JS sem definição CSS
   ══════════════════════════════════════════════════════ */

/* Grid de 2 colunas */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 540px) {
  .grid-2 { grid-template-columns: 1fr; }
}

/* Form label */
.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 0.35rem;
  letter-spacing: 0.02em;
}

/* Form erro inline */
.form-erro {
  font-size: 0.8rem;
  color: var(--danger);
  margin-top: 0.35rem;
}

/* Toolbar do professor */
.prof-toolbar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

/* Listas de conteúdo (professor e aluno) */
.conteudo-lista,
.lista-aluno {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* Chips de filtro por tipo */
.chips-tipo,
.chips-tipo-aluno {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

/* ── SIMULADO ─────────────────────────────────────────── */

.simulado-container,
.simulado {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.simulado__titulo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.simulado__acoes {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.simulado-placar,
.simulado__placar {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  padding: 0.4rem 0.8rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.questao {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.questao__numero {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.questao__enunciado {
  font-size: 0.97rem;
  color: var(--text);
  line-height: 1.6;
  margin: 0;
}

.alternativas {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.alternativa {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.9rem;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  background: var(--bg);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  font-size: 0.9rem;
  color: var(--text);
}

.alternativa:hover {
  border-color: var(--primary);
  background: var(--bg-2);
}

.alternativa.selecionada {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
}

.alternativa.correta {
  border-color: #22c55e;
  background: #22c55e18;
  color: #4ade80;
}

.alternativa.incorreta {
  border-color: var(--danger);
  background: color-mix(in srgb, var(--danger) 10%, transparent);
  opacity: 0.7;
}

.alternativa__letra {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  min-width: 1.2rem;
}

/* ── DIGITAÇÃO ────────────────────────────────────────── */

.digitacao-card,
#digitacao-card {
  padding: 2rem;
}

.digitacao-estado-inicial,
#digitacao-estado-inicial {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  padding: 1rem 0;
}

.digitacao-jogo,
#digitacao-jogo {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.digitacao-frase,
#digitacao-frase {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1.9;
  padding: 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 80px;
  word-break: break-word;
}

.digitacao-resultado,
#digitacao-resultado {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 0;
  text-align: center;
}

.digitacao-wpm,
#digitacao-wpm,
.digitacao-precisao,
#digitacao-precisao,
.digitacao-tempo,
#digitacao-tempo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}

.resultado-wpm {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
}

.resultado-desc {
  font-size: 0.9rem;
  color: var(--text-2);
}

/* ══════════════════════════════════════════════════════════════════════════════
   MOBILE NAVIGATION SYSTEM — max-width: 768px
   Inspirado no ChatGPT mobile: sidebar como drawer, swipe, overlay.
   ⚠️  NENHUMA regra aqui afeta o layout desktop (> 768px).
   ══════════════════════════════════════════════════════════════════════════════ */

/* ── BOTÃO HAMBÚRGUER ──────────────────────────────────────────────────────── */

.btn-hamburguer {
  /* Oculto por padrão — aparece só no mobile */
  display: none;
}

@media (max-width: 768px) {
  /* Posicionado fixo no canto superior esquerdo, sobre o conteúdo */
  .btn-hamburguer {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1100; /* acima do overlay (1000) e da sidebar (1050) */
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--border-strong);
    background: var(--bg-2);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition),
                opacity var(--transition), transform var(--transition);
    /* Esconde quando menu está aberto (JS adiciona .menu-open ao #app) */
  }

  .btn-hamburguer:hover {
    background: var(--primary-dim);
    border-color: var(--primary);
  }

  /* As três linhas do ícone hambúrguer */
  .btn-hamburguer__linha {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--text-2);
    transition: transform var(--transition), opacity var(--transition), width var(--transition);
    transform-origin: center;
  }

  /* Esconde o hambúrguer quando o menu está aberto —
     o usuário fecha pelo overlay (clique fora) ou swipe.
     Evita sobreposição com o botão de voltar ao início na sidebar. */
  .app.menu-open .btn-hamburguer {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.8);
  }

  /* Animação das linhas → X quando aberto */
  .app.menu-open .btn-hamburguer .btn-hamburguer__linha:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .app.menu-open .btn-hamburguer .btn-hamburguer__linha:nth-child(2) {
    opacity: 0;
    width: 0;
  }
  .app.menu-open .btn-hamburguer .btn-hamburguer__linha:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* ── OVERLAY ESCURO ────────────────────────────────────────────────────────── */

/* Estrutura base — invisível no desktop */
.mobile-overlay {
  display: none;
}

@media (max-width: 768px) {
  .mobile-overlay {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1000; /* abaixo da sidebar (1050), acima do conteúdo */
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    /* Estado padrão: invisível e não-interativo */
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* Ativo quando menu está aberto */
  .app.menu-open .mobile-overlay {
    opacity: 1;
    pointer-events: all;
  }
}

/* ── SIDEBAR COMO DRAWER MOBILE ────────────────────────────────────────────── */

@media (max-width: 768px) {
  /* Redefine o layout do app: ocupa tela toda, sem coluna da sidebar */
  .app {
    grid-template-columns: 1fr !important;
    position: relative;
  }

  /* Sidebar sai da grade e vira elemento fixo (drawer) */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(var(--sidebar-w), 80vw); /* nunca ocupa mais de 80% da tela */
    height: 100dvh;                      /* dvh para respeitar barra de endereço */
    z-index: 1050;                       /* acima do overlay */
    border-right: 1px solid var(--border-strong);
    border-bottom: none;                 /* remove borda inferior do layout antigo */

    /* Estado fechado: fora da tela à esquerda */
    transform: translateX(-100%);
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;              /* hint de GPU para animação suave */

    /* Sombra para destacar da sobreposição */
    box-shadow: none;
  }

  /* Estado aberto */
  .app.menu-open .sidebar {
    transform: translateX(0);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.5);
  }

  /* Conteúdo principal ocupa tela toda (sidebar flutua sobre ele) */
  .conteudo-principal {
    width: 100%;
    height: 100dvh;
    /* Padding top para não colidir com o botão hambúrguer */
    padding-top: 0;
  }

  /* Padding interno do conteúdo — espaço extra no topo para o hambúrguer */
  .conteudo-view {
    padding-top: 4rem !important; /* altura do botão + folga */
  }

  /* Rodapé: full-width no mobile (JS não deve sobrepor left) */
  .rodape-fixo {
    left: 0 !important;
  }

  /* Sidebar header: adiciona espaço para o botão hambúrguer não colidir */
  .sidebar__header {
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
  }
}

/* ── AJUSTES FINOS PARA TELAS MUITO PEQUENAS (< 400px) ─────────────────────── */

@media (max-width: 400px) {
  .sidebar {
    width: 88vw; /* quase full-width em telas minúsculas */
  }

  .btn-hamburguer {
    top: 8px;
    left: 8px;
  }
}

/* ══════════════════════════════════════════════════════════════════════════════
   FIM DO SISTEMA MOBILE
   ══════════════════════════════════════════════════════════════════════════════ */