/* =====================================================
   QUIZ NOTEBOOKLM – Estilos Globais
   ===================================================== */

:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #eef2ff;
  --accent: #06b6d4;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --warning: #ca8a04;
  --warning-bg: #fef9c3;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --white: #ffffff;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --shadow-lg: 0 8px 32px rgba(79,70,229,.12);
  --font: 'Inter', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== HEADER ===== */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  color: var(--text);
}
.header-logo i { color: var(--primary); font-size: 1.4rem; }
.header-logo strong { color: var(--primary); }

.btn-professor {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--primary);
  color: var(--white);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 500;
  transition: background .2s;
}
.btn-professor:hover { background: var(--primary-dark); text-decoration: none; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #6366f1 60%, var(--accent) 100%);
  color: var(--white);
  padding: 52px 20px 48px;
  text-align: center;
}
.hero-inner { max-width: 700px; margin: 0 auto; }
.hero h1 { font-size: clamp(1.5rem, 4vw, 2.2rem); font-weight: 700; margin-bottom: 12px; }
.hero p { font-size: 1rem; opacity: .88; }

/* ===== MAIN ===== */
.main-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 16px 60px;
}

/* ===== CARD ===== */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 28px;
  margin-bottom: 24px;
  border: 1px solid var(--border);
}

/* ===== IDENTIFICAÇÃO ===== */
.identificacao h2 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: end;
}
@media (max-width: 520px) { .form-row { grid-template-columns: 1fr; } }

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: .85rem;
  font-weight: 500;
  color: var(--text);
}
.obrig { color: var(--danger); }
.form-group input,
.form-group select {
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: .95rem;
  color: var(--text);
  background: var(--white);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}
.form-group select { min-width: 120px; cursor: pointer; }
.hint {
  margin-top: 12px;
  font-size: .82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.hint i { color: var(--accent); }

/* ===== QUIZ FORM ===== */
.quiz-form .questao {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 24px 20px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  transition: border-color .3s, box-shadow .3s;
}
.quiz-form .questao:hover { border-color: #c7d2fe; box-shadow: 0 2px 12px rgba(79,70,229,.1); }

.questao-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}
.questao-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: .85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.questao-enunciado {
  font-size: .97rem;
  font-weight: 500;
  color: var(--text);
  flex: 1;
  padding-top: 4px;
}

.alternativas { list-style: none; display: flex; flex-direction: column; gap: 8px; }

.alternativa label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .2s, border-color .2s;
  font-size: .93rem;
}
.alternativa label:hover { background: var(--primary-light); border-color: #a5b4fc; }
.alternativa input[type="radio"] { display: none; }
.alternativa.selecionada label { background: var(--primary-light); border-color: var(--primary); color: var(--primary); font-weight: 500; }

/* feedback pós-envio */
.alternativa.correta label { background: var(--success-bg) !important; border-color: var(--success) !important; color: var(--success) !important; }
.alternativa.errada label  { background: var(--danger-bg) !important; border-color: var(--danger) !important; color: var(--danger) !important; }

.letra-alt {
  display: inline-flex;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--border);
  align-items: center;
  justify-content: center;
  font-size: .72rem;
  font-weight: 700;
  transition: background .2s, color .2s;
}
.alternativa.selecionada .letra-alt { background: var(--primary); color: var(--white); }
.alternativa.correta .letra-alt { background: var(--success); color: var(--white) !important; }
.alternativa.errada .letra-alt  { background: var(--danger); color: var(--white) !important; }

/* ===== SUBMIT ===== */
.submit-area {
  text-align: center;
  margin-top: 8px;
  margin-bottom: 32px;
}
.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--primary);
  color: var(--white);
  border: none;
  padding: 14px 40px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: background .2s, transform .1s, box-shadow .2s;
  box-shadow: var(--shadow-lg);
}
.btn-submit:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-submit:active { transform: translateY(0); }
.btn-submit:disabled { background: #94a3b8; cursor: not-allowed; transform: none; box-shadow: none; }

/* ===== RESULTADO ===== */
.resultado {
  text-align: center;
}
.resultado-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}
.resultado-header i {
  font-size: 3rem;
}
.resultado-header h2 { font-size: 1.5rem; font-weight: 700; }
.resultado-header p { color: var(--text-muted); font-size: .95rem; }

.resultado-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.stat-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 28px;
  min-width: 100px;
}
.stat-box.destaque {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}
.stat-num { font-size: 2rem; font-weight: 700; }
.stat-label { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; opacity: .75; }

/* gabarito pós-envio */
.resultado-gabarito { text-align: left; margin-bottom: 24px; }
.gabarito-titulo { font-size: .9rem; font-weight: 600; color: var(--text-muted); margin-bottom: 12px; text-transform: uppercase; letter-spacing: .06em; }
.gabarito-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(42px, 1fr)); gap: 6px; }
.gabarito-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  padding: 6px 4px;
  font-size: .78rem;
  font-weight: 600;
  border: 1px solid transparent;
}
.gabarito-item span:first-child { font-size: .68rem; opacity: .65; margin-bottom: 2px; }
.gabarito-item.ok { background: var(--success-bg); color: var(--success); border-color: #86efac; }
.gabarito-item.nok { background: var(--danger-bg); color: var(--danger); border-color: #fca5a5; }

.btn-novo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  padding: 10px 28px;
  border-radius: 8px;
  font-size: .92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.btn-novo:hover { background: var(--primary); color: var(--white); }

/* ===== PROFESSOR PAGE ===== */
.pagina-professor .hero { display: none; }

.filtros-card { margin-bottom: 20px; }
.filtros-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.filtros-group h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.filtros-group .sub { font-size: .85rem; color: var(--text-muted); }
.filtros-acoes {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.filtros-acoes select,
.filtros-acoes input {
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: .88rem;
  color: var(--text);
  background: var(--white);
  outline: none;
  transition: border-color .2s;
}
.filtros-acoes select:focus,
.filtros-acoes input:focus { border-color: var(--primary); }
.filtros-acoes input { min-width: 170px; }

.btn-export, .btn-refresh {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background .2s;
}
.btn-export { background: #059669; color: var(--white); }
.btn-export:hover { background: #047857; }
.btn-refresh { background: var(--primary-light); color: var(--primary); }
.btn-refresh:hover { background: #c7d2fe; }

/* stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
@media (max-width: 640px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow);
}
.stat-card i { font-size: 1.6rem; color: var(--primary); opacity: .8; }
.stat-card .big-num { font-size: 1.7rem; font-weight: 700; color: var(--text); display: block; line-height: 1; margin-bottom: 3px; }
.stat-card span:last-child { font-size: .78rem; color: var(--text-muted); }

/* tabela */
.tabela-card { overflow: hidden; }
.table-wrapper { overflow-x: auto; }
.tabela-resultados {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.tabela-resultados thead {
  background: var(--primary);
  color: var(--white);
}
.tabela-resultados th {
  padding: 12px 14px;
  text-align: left;
  font-weight: 600;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  white-space: nowrap;
}
.tabela-resultados td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}
.tabela-resultados tbody tr:last-child td { border-bottom: none; }
.tabela-resultados tbody tr:hover { background: var(--primary-light); }

.badge-turma {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 700;
  background: var(--primary-light);
  color: var(--primary);
}
.badge-sit {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 600;
}
.badge-sit.ap { background: var(--success-bg); color: var(--success); }
.badge-sit.rep { background: var(--danger-bg); color: var(--danger); }
.badge-sit.rec { background: var(--warning-bg); color: var(--warning); }

.nota-cell { font-weight: 700; font-size: 1rem; }
.nota-cell.alta { color: var(--success); }
.nota-cell.media { color: var(--warning); }
.nota-cell.baixa { color: var(--danger); }

.btn-detalhe {
  background: var(--primary-light);
  color: var(--primary);
  border: none;
  padding: 5px 12px;
  border-radius: 6px;
  font-size: .8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s;
}
.btn-detalhe:hover { background: #c7d2fe; }

/* loading / sem dados */
.loading-msg, .sem-dados {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
  font-size: .95rem;
}
.loading-msg i { font-size: 2rem; display: block; margin-bottom: 12px; color: var(--primary); }
.sem-dados i { font-size: 2.5rem; display: block; margin-bottom: 12px; opacity: .4; }

/* ===== MODAL ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.aberto { display: flex; }
.modal-box {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
  width: 100%;
  max-width: 700px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 28px 28px 24px;
  position: relative;
  animation: fadeInModal .25s ease;
}
@keyframes fadeInModal {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: .95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s;
}
.modal-close:hover { background: var(--danger-bg); color: var(--danger); }
.modal-box h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 20px; color: var(--primary); }

.modal-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.modal-info-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}
.modal-info-item label { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); display: block; margin-bottom: 4px; }
.modal-info-item span { font-size: .95rem; font-weight: 600; color: var(--text); }

.modal-respostas { margin-top: 16px; }
.modal-respostas h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); margin-bottom: 10px; }
.modal-resp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 6px;
}
.modal-resp-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px;
  border-radius: 6px;
  font-size: .8rem;
  font-weight: 600;
  border: 1px solid transparent;
}
.modal-resp-item .qn { font-size: .65rem; opacity: .7; margin-bottom: 2px; }
.modal-resp-item.ok { background: var(--success-bg); color: var(--success); border-color: #86efac; }
.modal-resp-item.nok { background: var(--danger-bg); color: var(--danger); border-color: #fca5a5; }
.modal-resp-item.nr { background: var(--border); color: var(--text-muted); }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--white);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 18px 20px;
  font-size: .82rem;
  color: var(--text-muted);
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: #1e293b;
  color: #fff;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: .9rem;
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
  opacity: 0;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), opacity .3s;
  z-index: 300;
  white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast.ok { background: #166534; }
.toast.err { background: #991b1b; }

/* ===== UTILITÁRIOS ===== */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }