/* ==========================================
   CONCURSEIRO PRO - CSS PRINCIPAL
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --primary: #4F46E5;
  --primary-dark: #3730A3;
  --primary-light: #818CF8;
  --secondary: #0EA5E9;
  --success: #10B981;
  --danger: #EF4444;
  --warning: #F59E0B;
  --info: #6366F1;
  --dark: #0F172A;
  --dark-2: #1E293B;
  --dark-3: #334155;
  --gray: #64748B;
  --gray-light: #94A3B8;
  --border: #E2E8F0;
  --bg: #F8FAFC;
  --white: #FFFFFF;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --card-shadow-hover: 0 10px 25px rgba(0,0,0,0.1), 0 4px 10px rgba(0,0,0,0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: all 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--dark);
  line-height: 1.6;
  font-size: 14px;
  min-height: 100vh;
}

/* ==========================================
   SCROLLBAR CUSTOMIZADA
   ========================================== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ==========================================
   TYPOGRAPHY
   ========================================== */
h1 { font-size: 2rem; font-weight: 800; }
h2 { font-size: 1.5rem; font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }
h5 { font-size: 0.875rem; font-weight: 600; }

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

/* ==========================================
   BOTÕES
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-secondary:hover {
  background: var(--primary);
  color: var(--white);
}

.btn-success {
  background: var(--success);
  color: var(--white);
  border-color: var(--success);
}
.btn-success:hover {
  background: #059669;
  border-color: #059669;
  color: var(--white);
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
  border-color: var(--danger);
}
.btn-danger:hover {
  background: #DC2626;
  border-color: #DC2626;
  color: var(--white);
}

.btn-ghost {
  background: transparent;
  color: var(--gray);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--bg);
  color: var(--dark);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 12px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
  border-radius: var(--radius);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ==========================================
   CARDS
   ========================================== */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-body {
  padding: 24px;
}

.card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: #F8FAFC;
  border-radius: 0 0 var(--radius) var(--radius);
}

/* ==========================================
   INPUTS / FORM ELEMENTS
   ========================================== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--dark-3);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--dark);
  background: var(--white);
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-control::placeholder {
  color: var(--gray-light);
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748B' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

/* ==========================================
   BADGES
   ========================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary { background: rgba(79,70,229,0.1); color: var(--primary); }
.badge-success { background: rgba(16,185,129,0.1); color: var(--success); }
.badge-danger { background: rgba(239,68,68,0.1); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,0.1); color: var(--warning); }
.badge-info { background: rgba(99,102,241,0.1); color: var(--info); }
.badge-gray { background: rgba(100,116,139,0.1); color: var(--gray); }

/* ==========================================
   ALERTS
   ========================================== */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-success { background: rgba(16,185,129,0.1); color: #065F46; border: 1px solid rgba(16,185,129,0.3); }
.alert-danger { background: rgba(239,68,68,0.1); color: #991B1B; border: 1px solid rgba(239,68,68,0.3); }
.alert-warning { background: rgba(245,158,11,0.1); color: #92400E; border: 1px solid rgba(245,158,11,0.3); }
.alert-info { background: rgba(79,70,229,0.1); color: #3730A3; border: 1px solid rgba(79,70,229,0.3); }

/* ==========================================
   NAVBAR
   ========================================== */
.navbar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.navbar-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
}

.navbar-brand .logo-text {
  font-size: 18px;
  font-weight: 800;
  color: var(--dark);
}

.navbar-brand .logo-text span {
  color: var(--primary);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--gray);
  font-weight: 500;
  font-size: 14px;
  transition: var(--transition);
  text-decoration: none;
}

.nav-link:hover, .nav-link.active {
  background: rgba(79,70,229,0.08);
  color: var(--primary);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  flex-shrink: 0;
}

/* ==========================================
   SIDEBAR
   ========================================== */
.layout-wrapper {
  display: flex;
  min-height: calc(100vh - 64px);
}

.sidebar {
  width: 260px;
  background: var(--white);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  flex-shrink: 0;
  overflow-y: auto;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
}

.sidebar-section {
  padding: 0 12px;
  margin-bottom: 8px;
}

.sidebar-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray-light);
  padding: 8px 12px;
  margin-bottom: 4px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--gray);
  font-weight: 500;
  font-size: 14px;
  transition: var(--transition);
  text-decoration: none;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.sidebar-link:hover {
  background: rgba(79,70,229,0.06);
  color: var(--primary);
}

.sidebar-link.active {
  background: rgba(79,70,229,0.1);
  color: var(--primary);
  font-weight: 600;
}

.sidebar-link .icon {
  width: 20px;
  text-align: center;
  font-size: 15px;
}

.sidebar-link .badge-count {
  margin-left: auto;
  background: var(--primary);
  color: white;
  font-size: 11px;
  font-weight: 700;
  min-width: 20px;
  height: 20px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
}

.main-content {
  flex: 1;
  padding: 28px;
  overflow-y: auto;
  max-width: 100%;
}

/* ==========================================
   STATS CARDS
   ========================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.stat-card.blue::before { background: linear-gradient(90deg, var(--primary), var(--secondary)); }
.stat-card.green::before { background: linear-gradient(90deg, var(--success), #34D399); }
.stat-card.orange::before { background: linear-gradient(90deg, var(--warning), #FBBF24); }
.stat-card.red::before { background: linear-gradient(90deg, var(--danger), #F87171); }

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  color: var(--gray);
  font-weight: 500;
}

.stat-icon {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.stat-card.blue .stat-icon { background: rgba(79,70,229,0.1); color: var(--primary); }
.stat-card.green .stat-icon { background: rgba(16,185,129,0.1); color: var(--success); }
.stat-card.orange .stat-icon { background: rgba(245,158,11,0.1); color: var(--warning); }
.stat-card.red .stat-icon { background: rgba(239,68,68,0.1); color: var(--danger); }

/* ==========================================
   TABELAS
   ========================================== */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  background: #F8FAFC;
  padding: 12px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid #F1F5F9;
  font-size: 13px;
  vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }

tbody tr:hover { background: #F8FAFC; }

/* ==========================================
   FILTROS
   ========================================== */
.filters-panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.filters-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  align-items: end;
}

/* ==========================================
   QUESTION CARD
   ========================================== */
.question-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  margin-bottom: 20px;
  transition: var(--transition);
}

.question-card:hover {
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(79,70,229,0.2);
}

.question-header {
  padding: 16px 20px;
  background: #F8FAFC;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.question-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.question-body {
  padding: 20px;
}

.question-statement {
  font-size: 15px;
  line-height: 1.7;
  color: var(--dark);
  margin-bottom: 20px;
}

.question-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  background: var(--white);
}

.option-item:hover {
  border-color: var(--primary);
  background: rgba(79,70,229,0.02);
}

.option-item.selected {
  border-color: var(--primary);
  background: rgba(79,70,229,0.05);
}

.option-item.correct {
  border-color: var(--success);
  background: rgba(16,185,129,0.05);
}

.option-item.wrong {
  border-color: var(--danger);
  background: rgba(239,68,68,0.05);
}

.option-label {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
  transition: var(--transition);
}

.option-item.selected .option-label {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.option-item.correct .option-label {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.option-item.wrong .option-label {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
}

.option-text {
  font-size: 14px;
  line-height: 1.6;
  flex: 1;
  padding-top: 2px;
}


/* Botão de confirmar resposta */
.confirm-answer-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0 4px;
  border-top: 1px dashed var(--border);
  margin-top: 4px;
}

/* Opção selecionada aguardando confirmação */
.option-item.selected {
  border-color: var(--primary);
  background: rgba(79, 70, 229, 0.06);
}

.option-item.selected .option-label {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}


/* Botão de eliminar alternativa */
.option-eliminate-btn {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--gray);
  transition: var(--transition);
  flex-shrink: 0;
  padding: 0;
  font-family: inherit;
}

.option-eliminate-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: rgba(239,68,68,0.05);
}

.option-eliminate-btn.eliminated {
  border-color: var(--warning);
  color: var(--warning);
  background: rgba(245,158,11,0.08);
}

/* Alternativa eliminada */
.option-item.eliminated {
  opacity: 0.45;
  background: #fafafa;
  border-color: #e2e8f0;
}

.option-item.eliminated .option-text {
  text-decoration: line-through;
  color: var(--gray-light);
}

.option-item.eliminated .option-label {
  border-color: #cbd5e1;
  color: #cbd5e1;
}

/* True/False */
.tf-options {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.tf-btn {
  flex: 1;
  padding: 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  background: white;
  font-family: inherit;
  font-weight: 600;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.tf-btn.certo {
  border-color: var(--success);
  color: var(--success);
}

.tf-btn.errado {
  border-color: var(--danger);
  color: var(--danger);
}

.tf-btn.selected-certo {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.tf-btn.selected-errado {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
}

.question-explanation {
  margin-top: 20px;
  padding: 16px;
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--success);
}

.question-explanation.wrong-exp {
  background: #FEF2F2;
  border-color: #FECACA;
  border-left-color: var(--danger);
}

.explanation-title {
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  color: var(--success);
}

.question-explanation.wrong-exp .explanation-title {
  color: var(--danger);
}

.explanation-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--dark);
}

/* ==========================================
   PROGRESS BAR
   ========================================== */
.progress {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 4px;
  transition: width 0.5s ease;
}

.progress-bar.success { background: linear-gradient(90deg, var(--success), #34D399); }
.progress-bar.warning { background: linear-gradient(90deg, var(--warning), #FBBF24); }
.progress-bar.danger { background: linear-gradient(90deg, var(--danger), #F87171); }

/* ==========================================
   MODAL
   ========================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
}

.modal-lg { max-width: 900px; }
.modal-sm { max-width: 420px; }

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body { padding: 24px; }

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

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

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================
   TOAST
   ========================================== */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  min-width: 280px;
  max-width: 380px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideInRight 0.3s ease;
  font-size: 14px;
  font-weight: 500;
}

.toast.success { background: var(--success); color: white; }
.toast.error { background: var(--danger); color: white; }
.toast.warning { background: var(--warning); color: white; }
.toast.info { background: var(--primary); color: white; }

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}

/* ==========================================
   PAGINATION
   ========================================== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 20px 0;
}

.page-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--white);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
  color: var(--gray);
  font-family: inherit;
}

.page-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ==========================================
   LOADING / SKELETON
   ========================================== */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease infinite;
  border-radius: 6px;
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 1024px) {
  .sidebar {
    width: 220px;
  }
  .main-content {
    padding: 20px;
  }
}

@media (max-width: 768px) {
  .layout-wrapper {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    display: none;
  }
  .sidebar.open {
    display: block;
  }
  .main-content {
    padding: 16px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .filters-grid {
    grid-template-columns: 1fr;
  }
  .navbar {
    padding: 0 16px;
  }
  .tf-options {
    flex-direction: column;
  }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .modal {
    margin: 10px;
    max-height: 95vh;
  }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-gray { color: var(--gray); }
.text-muted { color: var(--gray-light); }
.text-dark { color: var(--dark); }

.bg-primary { background: var(--primary); }
.bg-success { background: var(--success); }
.bg-danger { background: var(--danger); }
.bg-warning { background: var(--warning); }

.fw-400 { font-weight: 400; }
.fw-500 { font-weight: 500; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.fw-800 { font-weight: 800; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }

.mt-4 { margin-top: 4px; }
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.mt-24 { margin-top: 24px; }
.mb-4 { margin-bottom: 4px; }
.mb-8 { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }

.w-100 { width: 100%; }
.text-center { text-align: center; }

.hidden { display: none !important; }

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

/* Level indicators */
.level-facil { color: var(--success); }
.level-medio { color: var(--warning); }
.level-dificil { color: var(--danger); }

/* Correct rate colors */
.rate-high { color: var(--success); }
.rate-mid { color: var(--warning); }
.rate-low { color: var(--danger); }