/* ==========================================================================
   Variáveis Globais
   ========================================================================== */
   .chart-item {
  background: #fff;
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.chart-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

canvas {
  max-width: 100% !important;
  height: auto !important;
}

@media (max-width: 768px) {
  .chart-item {
    padding: 12px;
  }

  canvas {
    max-height: 250px !important;
  }
}

:root {
  /* Cores Primárias */
  --primary: #4f46e5;
  /* Indigo profundo */
  --primary-dark: #4338ca;
  --primary-light: #818cf8;
  --secondary: #f3f4f6;
  /* Cinza claro */
  --secondary-dark: #d1d5db;
  --danger: #dc2626;
  --danger-dark: #b91c1c;
  --success: #10b981;
  --success-dark: #047857;

  /* Cores de Texto e Fundo */
  --text-dark: #111827;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  --background: #f9fafb;
  --white: #ffffff;
  --dark-background: #1f2937;
  --dark-text: #f1f5f9;
  --dark-muted: #9ca3af;
  --dark-secondary: #374151;

  /* Sombras e Efeitos */
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-dark: 0 4px 12px rgba(0, 0, 0, 0.3);

  /* Espaçamentos */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Bordas e Raios */
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-xs: 4px;

  /* Tipografia */
  --font-size-xs: clamp(0.75rem, 2vw, 0.8125rem);
  --font-size-base: clamp(0.875rem, 2.5vw, 0.9375rem);
  --font-size-lg: clamp(1rem, 3vw, 1.125rem);
  --font-size-xl: clamp(1.25rem, 3.5vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 4vw, 1.75rem);

  /* Transições */
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Reset e Estilos Base
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
  touch-action: manipulation;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, var(--background), #e0e7ff);
  color: var(--text-dark);
  line-height: 1.8;
  min-height: 100vh;
  font-size: var(--font-size-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.dark {
  background: linear-gradient(135deg, var(--dark-background), #2d3748);
  color: var(--dark-text);
}

/* ==========================================================================
   Layout Principal
   ========================================================================== */
.container {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* ==========================================================================
   Sidebar
   ========================================================================== */
.sidebar {
  width: 280px;
  background: linear-gradient(180deg, #1f2937, #111827);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex-shrink: 0;
  transition: width var(--transition-base);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 1000;
}

body.dark .sidebar {
  background: linear-gradient(180deg, #111827, #1f2937);
}

.sidebar button {
  padding: 12px 16px;
  background: transparent;
  color: #f1f5f9;
  border: none;
  border-radius: var(--border-radius-sm);
  text-align: left;
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.sidebar button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.15);
  transition: left var(--transition-fast);
}

.sidebar button:hover::before,
.sidebar button:focus::before {
  left: 0;
}

.sidebar button:hover,
.sidebar button:focus {
  background: #374151;
  transform: translateX(6px);
}

body.dark .sidebar button:hover,
body.dark .sidebar button:focus {
  background: #4b5563;
}

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

body.dark .sidebar button.active {
  background: var(--primary-dark);
}

.sidebar button.active::before {
  left: 100%;
}

.sidebar button i {
  margin-right: var(--spacing-sm);
  transition: transform var(--transition-fast);
}

.sidebar button:hover i,
.sidebar button:focus i {
  transform: rotate(15deg);
}

/* ==========================================================================
   Conteúdo Principal
   ========================================================================== */
.main-content {
  flex: 1;
  padding: var(--spacing-xl);
  margin-left: 280px;
  overflow-y: auto;
  background: var(--background);
  animation: fadeIn 0.6s ease-out;
}

body.dark .main-content {
  background: var(--dark-background);
}

/* ==========================================================================
   Tipografia
   ========================================================================== */
h1 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
}

body.dark h1 {
  color: var(--dark-text);
}

h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
}

body.dark h2 {
  color: var(--dark-text);
}

h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
  font-weight: 500;
}

body.dark h3 {
  color: var(--dark-text);
}

h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
  font-weight: 500;
}

body.dark h4 {
  color: var(--dark-text);
}

/* ==========================================================================
   Seções
   ========================================================================== */
.section {
  background: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: var(--spacing-lg);
  transition: var(--transition-base);
}

body.dark .section {
  background: var(--dark-secondary);
  box-shadow: var(--shadow-dark);
}

.section:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* ==========================================================================
   Container de Adicionar Pergunta
   ========================================================================== */
.add-question-container {
  display: flex;
  flex-direction: row;
  gap: var(--spacing-lg);
  align-items: flex-start;
  max-width: 100%;
  flex-wrap: wrap;
}

/* ==========================================================================
   Formulário
   ========================================================================== */
.form-container {
  flex: 2;
  background: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition-base);
}

body.dark .form-container {
  background: var(--dark-secondary);
  box-shadow: var(--shadow-dark);
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-md);
}

label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-base);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--text-dark);
}

body.dark label {
  color: var(--dark-text);
}

input,
select,
textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--secondary-dark);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-base);
  color: var(--text-dark);
  transition: var(--transition-base);
  background: var(--white);
  min-height: 48px;
}

body.dark input,
body.dark select,
body.dark textarea {
  background: #2d3748;
  color: var(--dark-text);
  border-color: #4b5563;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
  transform: scale(1.01);
}

body.dark input:focus,
body.dark select:focus,
body.dark textarea:focus {
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.3);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* :user-invalid só marca depois que a pessoa mexe no campo (com :invalid o formulário já abria todo vermelho). */
input:user-invalid,
select:user-invalid {
  border-color: var(--danger);
  animation: shake 0.2s ease;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

/* Input with Icons */
.form-container .relative input,
.form-container .relative select {
  padding-left: 2.5rem;
}

.form-container .relative i {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

body.dark .form-container .relative i {
  color: var(--dark-muted);
}

.form-container input:focus+i,
.form-container select:focus+i {
  color: var(--primary);
}

body.dark .form-container input:focus+i,
body.dark .form-container select:focus+i {
  color: var(--primary-light);
}

/* Error Messages */
.form-container p.text-red-500 {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xs);
  color: var(--danger);
  margin-top: var(--spacing-xs);
}

/* Checkboxes */
input[type="checkbox"] {
  width: 24px;
  height: 24px;
  accent-color: var(--primary);
  border: 2px solid var(--secondary-dark);
  border-radius: var(--border-radius-xs);
  cursor: pointer;
  transition: var(--transition-fast);
  appearance: none;
  background: var(--white);
  position: relative;
}

input[type="checkbox"]:checked {
  background: var(--primary);
  border-color: var(--primary);
}

input[type="checkbox"]:checked::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--white);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 14px;
}

input[type="checkbox"]:focus-visible {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
  box-shadow: 0 0 8px rgba(79, 70, 229, 0.3);
}

body.dark input[type="checkbox"] {
  background: #2d3748;
  border-color: #4b5563;
}

body.dark input[type="checkbox"]:checked {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* File Input */
input[type="file"] {
  padding: 8px;
  background: var(--secondary);
  border: none;
  transition: var(--transition-base);
}

body.dark input[type="file"] {
  background: #4b5563;
}

input[type="file"]::file-selector-button {
  padding: 8px 16px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition-base);
}

body.dark input[type="file"]::file-selector-button {
  background: var(--primary-dark);
}

input[type="file"]::file-selector-button:hover {
  background: var(--primary-dark);
}

body.dark input[type="file"]::file-selector-button:hover {
  background: var(--primary);
}

/* ==========================================================================
   Botões
   ========================================================================== */
button {
  padding: 12px 16px;
  border: none;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
  min-height: 48px;
}

button.primary {
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  color: var(--white);
}

body.dark button.primary {
  background: linear-gradient(90deg, var(--primary-dark), var(--primary));
}

button.primary:hover,
button.primary:focus {
  background: linear-gradient(90deg, var(--primary-dark), var(--primary));
  transform: scale(1.05);
  box-shadow: var(--shadow-hover);
}

button.primary:active {
  transform: scale(0.98);
}

button.primary::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.2s ease, height 0.2s ease;
}

button.primary:active::after {
  width: 150px;
  height: 150px;
}

button.secondary {
  background: var(--secondary);
  color: var(--text-dark);
}

body.dark button.secondary {
  background: #4b5563;
  color: var(--dark-text);
}

button.secondary:hover,
button.secondary:focus {
  background: var(--secondary-dark);
  transform: scale(1.05);
  box-shadow: var(--shadow-hover);
}

body.dark button.secondary:hover,
body.dark button.secondary:focus {
  background: #6b7280;
}

button.danger {
  background: var(--danger);
  color: var(--white);
}

body.dark button.danger {
  background: var(--danger-dark);
}

button.danger:hover,
button.danger:focus {
  background: var(--danger-dark);
  transform: scale(1.05);
}

button i {
  margin-right: var(--spacing-xs);
  transition: transform var(--transition-fast);
}

button:hover i,
button:focus i {
  transform: translateX(2px);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ==========================================================================
   Flex
   ========================================================================== */
.flex {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
}

.flex.items-center {
  gap: var(--spacing-sm);
}

/* ==========================================================================
   Visualização de Imagens
   ========================================================================== */
.image-preview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: rgba(243, 244, 246, 0.6);
  border-radius: var(--border-radius);
  animation: fadeIn 0.3s ease-out;
}

body.dark .image-preview {
  background: rgba(55, 65, 81, 0.6);
}

.image-preview .group {
  position: relative;
  transition: var(--transition-base);
}

.image-preview .group:hover img {
  transform: scale(1.05);
}

.image-preview img {
  width: 100%;
  height: 100px;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow);
  transition: transform var(--transition-base);
}

.image-preview button {
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  background: var(--danger);
  color: var(--white);
  padding: 4px 8px;
  font-size: var(--font-size-xs);
  border-radius: var(--border-radius-xs);
  transition: var(--transition-base);
  opacity: 0;
}

.image-preview .group:hover button {
  opacity: 1;
}

.image-preview button:hover,
.image-preview button:focus {
  background: var(--danger-dark);
  transform: scale(1.1);
}

/* ==========================================================================
   Pré-visualização
   ========================================================================== */
.preview-panel {
  flex: 1;
  background: linear-gradient(180deg, #e0e7ff, var(--white));
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  max-width: 440px;
  transition: var(--transition-base);
  animation: slideInRight 0.5s ease-out;
  position: sticky;
  top: var(--spacing-md);
}

body.dark .preview-panel {
  background: linear-gradient(180deg, #2d3748, var(--dark-secondary));
  box-shadow: var(--shadow-dark);
}

.preview-panel .bg-white {
  background: var(--white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow);
}

body.dark .preview-panel .bg-white {
  background: #2d3748;
}

.preview-panel .bg-gray-100 {
  background: var(--secondary);
  transition: background var(--transition-fast);
}

body.dark .preview-panel .bg-gray-100 {
  background: #4b5563;
}

.preview-panel .bg-gray-100:hover {
  background: var(--secondary-dark);
}

body.dark .preview-panel .bg-gray-100:hover {
  background: #6b7280;
}

/* ==========================================================================
   Abas de Opções
   ========================================================================== */
.option-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-xs);
  background: var(--secondary);
  border-radius: var(--border-radius);
}

body.dark .option-tabs {
  background: #4b5563;
}

.option-tab {
  padding: 8px 16px;
  background: var(--white);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: 500;
  transition: var(--transition-base);
  box-shadow: var(--shadow);
  min-height: 36px;
}

body.dark .option-tab {
  background: #2d3748;
  color: var(--dark-text);
}

.option-tab:hover,
.option-tab:focus {
  background: var(--primary);
  color: var(--white);
  transform: scale(1.05);
}

.option-tab.active {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.option-content {
  padding: var(--spacing-md);
  background: var(--secondary);
  border-radius: var(--border-radius-sm);
}

body.dark .option-content {
  background: #4b5563;
}

.option-content p {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-base);
}

.correct {
  color: var(--success);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.correct::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: var(--font-size-base);
}

/* ==========================================================================
   Tooltip
   ========================================================================== */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip::after {
  content: attr(title);
  position: absolute;
  bottom: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  background: #1f2937;
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
  z-index: 10;
}

body.dark .tooltip::after {
  background: #374151;
}

.tooltip:hover::after,
.tooltip:focus::after {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   Tabs de Séries
   ========================================================================== */
.tabs {
  background: linear-gradient(135deg, var(--secondary), #e5e7eb);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow-x: auto;
  white-space: nowrap;
  position: sticky;
  top: var(--spacing-md);
  z-index: 10;
}

body.dark .tabs {
  background: linear-gradient(135deg, #4b5563, #374151);
  box-shadow: var(--shadow-dark);
}

.tabs .flex {
  display: inline-flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.tabs button {
  padding: 12px 20px;
  background: var(--white);
  color: var(--text-dark);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-base);
  min-width: 140px;
  text-align: center;
  border: 1px solid transparent;
}

body.dark .tabs button {
  background: #2d3748;
  color: var(--dark-text);
}

.tabs button:hover,
.tabs button:focus {
  background: var(--primary-light);
  color: var(--white);
  transform: scale(1.03);
  border-color: var(--primary);
}

body.dark .tabs button:hover,
body.dark .tabs button:focus {
  background: var(--primary);
  border-color: var(--primary-dark);
}

.tabs button.bg-indigo-500 {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

body.dark .tabs button.bg-indigo-500 {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.tabs button:focus-visible {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
  box-shadow: 0 0 8px rgba(79, 70, 229, 0.3);
}

/* ==========================================================================
   Filtros
   ========================================================================== */
.filter-bar,
.sort-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--white), #f1f5f9);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  animation: slideUp 0.5s ease-out;
}

body.dark .filter-bar,
body.dark .sort-filter {
  background: linear-gradient(135deg, #2d3748, #374151);
  box-shadow: var(--shadow-dark);
}

.filter-bar>div,
.sort-filter>div {
  flex: 1;
  min-width: 220px;
}

.filter-bar label,
.sort-filter label {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
}

body.dark .filter-bar label,
body.dark .sort-filter label {
  color: var(--dark-text);
}

.filter-bar input,
.filter-bar select,
.sort-filter select {
  padding: 12px;
  border: 1px solid var(--secondary-dark);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-base);
  transition: var(--transition-base);
  background: var(--white);
}

body.dark .filter-bar input,
body.dark .filter-bar select,
body.dark .sort-filter select {
  background: #1f2937;
  border-color: #4b5563;
  color: var(--dark-text);
}

.filter-bar input:focus,
.filter-bar select:focus,
.sort-filter select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
  transform: scale(1.01);
}

.filter-bar input:hover,
.filter-bar select:hover,
.sort-filter select:hover {
  background: #f1f5f9;
  border-color: var(--primary);
}

body.dark .filter-bar input:hover,
body.dark .filter-bar select:hover,
body.dark .sort-filter select:hover {
  background: #374151;
}

/* ==========================================================================
   Estatísticas
   ========================================================================== */
.stats {
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--white), #e0e7ff);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: var(--spacing-lg);
  transition: var(--transition-base);
  animation: fadeIn 0.5s ease-out;
}

body.dark .stats {
  background: linear-gradient(135deg, #2d3748, #374151);
  box-shadow: var(--shadow-dark);
}

.stats p {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

body.dark .stats p {
  color: var(--dark-text);
}

.stats p::before {
  content: '\f0cb';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--primary);
  font-size: 1rem;
}

body.dark .stats p::before {
  color: var(--primary-dark);
}

.series-stats {
  margin-top: var(--spacing-md);
}

.series-stats h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

body.dark .series-stats h3 {
  color: var(--dark-text);
}

.series-stats h3::before {
  content: '\f0db';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--primary);
  font-size: 1rem;
}

body.dark .series-stats h3::before {
  color: var(--primary-dark);
}

.series-stats .grid {
  gap: var(--spacing-sm);
}

.series-stats div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px;
  background: var(--secondary);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-base);
  box-shadow: var(--shadow);
}

body.dark .series-stats div {
  background: #4b5563;
}

.series-stats div:hover {
  background: var(--secondary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

body.dark .series-stats div:hover {
  background: #6b7280;
}

.series-stats span:first-child {
  font-size: var(--font-size-base);
  color: var(--text-dark);
  font-weight: 500;
}

body.dark .series-stats span:first-child {
  color: var(--dark-text);
}

.series-stats span:last-child {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--primary);
}

body.dark .series-stats span:last-child {
  color: var(--primary-dark);
}

/* ==========================================================================
   Itens de Pergunta
   ========================================================================== */
.question-item {
  background: var(--white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: var(--spacing-md);
  transition: var(--transition-base);
  animation: slideUp 0.5s ease-out;
}

body.dark .question-item {
  background: var(--dark-secondary);
  box-shadow: var(--shadow-dark);
}

.question-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  background: #f1f5f9;
}

body.dark .question-item:hover {
  background: #4b5563;
}

.question-item.expanded {
  padding-bottom: var(--spacing-lg);
}

.question-item .expanded-content {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--secondary);
  border-radius: var(--border-radius-sm);
  animation: fadeIn 0.3s ease-out;
  border-left: 4px solid var(--primary);
}

body.dark .question-item .expanded-content {
  background: #2d3748;
  border-left-color: var(--primary-dark);
}

.question-item .expanded-content p {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-base);
}

.question-item .expanded-content strong {
  color: var(--text-dark);
  font-weight: 600;
}

body.dark .question-item .expanded-content strong {
  color: var(--dark-text);
}

.question-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-md);
}

/* Expand Toggle Button */
.question-item button.text-indigo-600 {
  padding: 8px;
  background: transparent;
  color: var(--primary);
  font-size: var(--font-size-lg);
  transition: var(--transition-fast);
}

body.dark .question-item button.text-indigo-600 {
  color: var(--primary-light);
}

.question-item button.text-indigo-600:hover,
.question-item button.text-indigo-600:focus {
  color: var(--primary-dark);
  transform: scale(1.1);
}

body.dark .question-item button.text-indigo-600:hover,
body.dark .question-item button.text-indigo-600:focus {
  color: var(--primary);
}

.question-item button.text-indigo-600:focus-visible {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
}

/* ==========================================================================
   Tabela de Desempenho
   ========================================================================== */
.performance-table {
  max-height: 500px;
  overflow: auto;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  position: relative;
}

body.dark .performance-table {
  background: var(--dark-secondary);
  box-shadow: var(--shadow-dark);
}

.performance-table table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--white);
  border-radius: var(--border-radius);
  overflow: hidden;
}

body.dark .performance-table table {
  background: var(--dark-secondary);
}

.performance-table th,
.performance-table td {
  padding: 12px 16px;
  text-align: center;
  border-bottom: 1px solid var(--secondary-dark);
  font-size: var(--font-size-base);
}

body.dark .performance-table th,
body.dark .performance-table td {
  border-bottom: 1px solid #4b5563;
}

.performance-table th {
  background: var(--white);
  font-weight: 600;
  color: var(--text-dark);
  position: sticky;
  top: 0;
  z-index: 10;
}

body.dark .performance-table th {
  background: #2d3748;
  color: var(--dark-text);
}

.performance-table th:first-child {
  left: 0;
  z-index: 20;
}

.performance-table td {
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: background 0.3s ease;
}

body.dark .performance-table td {
  color: var(--dark-text);
}

.performance-table td:first-child {
  position: sticky;
  left: 0;
  background: var(--white);
  z-index: 5;
}

body.dark .performance-table td:first-child {
  background: #2d3748;
}

.performance-table td.correct {
  background: #d1fae5;
  color: var(--success);
}

body.dark .performance-table td.correct {
  background: #064e3b;
}

.performance-table td.incorrect {
  background: #fee2e2;
  color: var(--danger);
}

body.dark .performance-table td.incorrect {
  background: #7f1d1d;
}

.performance-table td.unanswered {
  background: var(--secondary);
  color: var(--text-muted);
}

body.dark .performance-table td.unanswered {
  background: #4b5563;
  color: var(--dark-muted);
}

.performance-table td[title] {
  cursor: pointer;
  position: relative;
}

.performance-table td[title]:hover::after,
.performance-table td[title]:focus::after {
  content: attr(title);
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: #1f2937;
  color: var(--dark-text);
  padding: 10px 14px;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  white-space: normal;
  max-width: 320px;
  z-index: 100;
  box-shadow: var(--shadow-hover);
  animation: fadeInTooltip 0.2s ease-out;
}

body.dark .performance-table td[title]:hover::after,
body.dark .performance-table td[title]:focus::after {
  background: #374151;
}

.performance-table tr {
  transition: background 0.3s ease;
}

.performance-table tr:hover {
  background: rgba(79, 70, 229, 0.05);
}

body.dark .performance-table tr:hover {
  background: rgba(79, 70, 229, 0.1);
}

/* ==========================================================================
   Modal
   ========================================================================== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.4s ease-out;
  padding: var(--spacing-md);
}

body.dark .modal {
  background: rgba(0, 0, 0, 0.8);
}

.modal-content {
  background: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  max-width: 720px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-hover);
  backdrop-filter: blur(12px);
  animation: zoomIn 0.4s ease-out;
}

body.dark .modal-content {
  background: var(--dark-secondary);
  box-shadow: var(--shadow-dark);
}

/* ==========================================================================
   Carregamento
   ========================================================================== */
.loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  padding: var(--spacing-lg);
  gap: var(--spacing-md);
}

body.dark .loading {
  color: var(--dark-muted);
}

.loading::before {
  content: '';
  width: 24px;
  height: 24px;
  border: 3px solid var(--primary);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

body.dark .loading::before {
  border-color: var(--primary-dark);
  border-top-color: transparent;
}

/* ==========================================================================
   Toggle de Visualização
   ========================================================================== */
.view-toggle {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.view-toggle button {
  padding: 12px;
  background: var(--secondary);
  color: var(--text-dark);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-base);
}

body.dark .view-toggle button {
  background: #4b5563;
  color: var(--dark-text);
}

.view-toggle button:hover,
.view-toggle button:focus {
  background: var(--secondary-dark);
  transform: scale(1.1);
}

body.dark .view-toggle button:hover,
body.dark .view-toggle button:focus {
  background: #6b7280;
}

.view-toggle button.bg-indigo-500 {
  background: var(--primary);
  color: var(--white);
}

body.dark .view-toggle button.bg-indigo-500 {
  background: var(--primary-dark);
}

.view-toggle button i {
  font-size: var(--font-size-lg);
}

/* ==========================================================================
   Paginação
   ========================================================================== */
.flex[style*="justifyContent: center"] {
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  animation: fadeIn 0.5s ease-out;
  justify-content: center;
  align-items: center;
}

body.dark .flex[style*="justifyContent: center"] {
  background: var(--dark-secondary);
  box-shadow: var(--shadow-dark);
}

.flex[style*="justifyContent: center"] button {
  padding: 12px 24px;
  font-size: var(--font-size-base);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.flex[style*="justifyContent: center"] button i {
  font-size: var(--font-size-lg);
  transition: transform var(--transition-fast);
}

.flex[style*="justifyContent: center"] button:hover i {
  transform: translateX(4px);
}

.flex[style*="justifyContent: center"] button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.flex[style*="justifyContent: center"] span {
  font-size: var(--font-size-base);
  color: var(--text-dark);
  font-weight: 500;
}

body.dark .flex[style*="justifyContent: center"] span {
  color: var(--dark-text);
}

/* ==========================================================================
   Badges
   ========================================================================== */
.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: var(--border-radius-xs);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-align: center;
  min-width: 24px;
}

.badge.success {
  background: #d1fae5;
  color: var(--success);
}

body.dark .badge.success {
  background: #064e3b;
}

.badge.danger {
  background: #fee2e2;
  color: var(--danger);
}

body.dark .badge.danger {
  background: #7f1d1d;
}

.badge.rank-1 {
  background: #ffd700;
  color: #111827;
}

.badge.rank-2 {
  background: #c0c0c0;
  color: #111827;
}

.badge.rank-3 {
  background: #cd7f32;
  color: #111827;
}

.badge.rank-4,
.badge.rank-5,
.badge.rank-6,
.badge.rank-7,
.badge.rank-8,
.badge.rank-9,
.badge.rank-10 {
  background: #e5e7eb;
  color: #111827;
}

body.dark .badge.rank-1,
body.dark .badge.rank-2,
body.dark .badge.rank-3,
body.dark .badge.rank-4,
body.dark .badge.rank-5,
body.dark .badge.rank-6,
body.dark .badge.rank-7,
body.dark .badge.rank-8,
body.dark .badge.rank-9,
body.dark .badge.rank-10 {
  color: #f1f5f9;
}

.badge.difficulty-facil {
  background: #d1fae5;
  color: var(--success);
}

body.dark .badge.difficulty-facil {
  background: #064e3b;
}

.badge.difficulty-medio {
  background: #fef9c3;
  color: #d97706;
}

body.dark .badge.difficulty-medio {
  background: #78350f;
}

.badge.difficulty-dificil {
  background: #fee2e2;
  color: var(--danger);
}

body.dark .badge.difficulty-dificil {
  background: #7f1d1d;
}

/* ==========================================================================
   Progress Bar
   ========================================================================== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--secondary);
  border-radius: var(--border-radius-xs);
  overflow: hidden;
}

body.dark .progress-bar {
  background: #4b5563;
}

.progress {
  height: 100%;
  background: var(--primary);
  transition: width 0.5s ease;
}

body.dark .progress {
  background: var(--primary-dark);
}

.progress.bg-red-500 {
  background: var(--danger);
}

body.dark .progress.bg-red-500 {
  background: var(--danger-dark);
}

.progress-bar.inline-block {
  width: 80px;
  display: inline-block;
  vertical-align: middle;
}

/* ==========================================================================
   Chart Container
   ========================================================================== */
.chart-container,
.chart-item {
  padding: var(--spacing-md);
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: var(--spacing-lg);
}

body.dark .chart-container,
body.dark .chart-item {
  background: var(--dark-secondary);
  box-shadow: var(--shadow-dark);
}

.charts .grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* ==========================================================================
   Animações
   ========================================================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes fadeInTooltip {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(40px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shake {

  0%,
  100% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-4px);
  }

  75% {
    transform: translateX(4px);
  }
}

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

@keyframes pulse {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }

  100% {
    transform: scale(1);
  }
}

.fade-in {
  animation: fadeIn 0.4s ease-out;
}

.fade-out {
  animation: fadeOut 0.4s ease-out;
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

.animate-pulse {
  animation: pulse 2.5s infinite;
}

.animate-slide-up {
  animation: slideUp 0.5s ease-out;
}

.animate-fade-in {
  animation: fadeIn 0.4s ease-out;
}

.animate-slide-in-right {
  animation: slideInRight 0.5s ease-out;
}

/* ==========================================================================
   Responsividade
   ========================================================================== */
@media (max-width: 1024px) {
  .add-question-container {
    flex-direction: column;
  }

  .form-container {
    padding-right: 0;
  }

  .preview-panel {
    max-width: 100%;
  }

  .flex.items-center {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }
}

/* ==========================================================================
   Notificações Toast (substituem alert() nativo do navegador)
   ========================================================================== */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: min(380px, calc(100vw - 2 * var(--spacing-lg)));
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: 14px 16px;
  border-radius: var(--border-radius-sm);
  background: var(--white);
  box-shadow: var(--shadow-hover);
  border-left: 4px solid var(--primary);
  color: var(--text-dark);
  font-size: var(--font-size-base);
  animation: toast-in 0.3s ease-out;
}

body.dark .toast {
  background: var(--dark-secondary);
  color: var(--dark-text);
}

.toast i:first-child {
  margin-top: 2px;
  flex-shrink: 0;
}

.toast span {
  flex: 1;
  line-height: 1.5;
}

.toast-close {
  background: transparent;
  border: none;
  color: inherit;
  opacity: 0.5;
  cursor: pointer;
  padding: 2px;
  flex-shrink: 0;
  min-height: auto;
}

.toast-close:hover {
  opacity: 1;
  background: transparent;
  transform: none;
}

.toast-success { border-left-color: var(--success); }
.toast-success i:first-child { color: var(--success); }
.toast-error { border-left-color: var(--danger); }
.toast-error i:first-child { color: var(--danger); }
.toast-warning { border-left-color: #d97706; }
.toast-warning i:first-child { color: #d97706; }
.toast-info { border-left-color: var(--primary); }
.toast-info i:first-child { color: var(--primary); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 480px) {
  .toast-container {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    left: var(--spacing-sm);
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .toast {
    animation: none;
  }
}

@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    flex-direction: column;
    flex-wrap: nowrap;
    padding: var(--spacing-md);
    position: static;
    height: auto;
  }

  .main-content {
    margin-left: 0;
    padding: var(--spacing-md);
  }

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

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

  .performance-table {
    font-size: var(--font-size-xs);
  }

  .performance-table table {
    display: block;
    overflow-x: auto;
  }

  .performance-table thead {
    display: none;
  }

  .performance-table tr {
    display: block;
    margin-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--secondary-dark);
  }

  .performance-table td {
    display: flex;
    justify-content: space-between;
    padding: 8px;
    border-bottom: none;
    max-width: none;
    white-space: normal;
  }

  .performance-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-dark);
    flex: 1;
    margin-right: var(--spacing-sm);
  }

  body.dark .performance-table td::before {
    color: var(--dark-text);
  }

  .performance-table td.truncate {
    max-width: none;
  }

  .filter-bar,
  .sort-filter {
    gap: var(--spacing-sm);
    flex-direction: column;
  }

  .filter-bar>div,
  .sort-filter>div {
    min-width: 100%;
  }

  .tabs {
    overflow-x: auto;
  }

  .tabs .flex {
    flex-wrap: nowrap;
  }

  .tabs button {
    min-width: 100px;
    font-size: var(--font-size-xs);
    padding: 10px 14px;
  }

  .question-item {
    padding: var(--spacing-sm);
  }

  .question-item.expanded {
    padding-bottom: var(--spacing-md);
  }

  .series-stats .grid {
    grid-template-columns: 1fr;
  }

  .stats p {
    font-size: var(--font-size-base);
  }

  .series-stats h3 {
    font-size: var(--font-size-base);
  }

  button {
    padding: 10px 14px;
    font-size: var(--font-size-xs);
  }

  input,
  select,
  textarea {
    padding: 10px;
    font-size: var(--font-size-xs);
  }

  .image-preview img {
    max-width: 80px;
    height: 80px;
  }
}

@media (max-width: 480px) {
  .performance-table {
    font-size: var(--font-size-xs);
  }

  .performance-table td {
    padding: 6px;
  }

  button {
    padding: 8px 12px;
    font-size: var(--font-size-xs);
  }

  input,
  select,
  textarea {
    padding: 8px;
    font-size: var(--font-size-xs);
  }

  .tabs button {
    min-width: 80px;
    padding: 8px 12px;
  }

  .question-item {
    padding: var(--spacing-xs);
  }

  .question-item.expanded {
    padding-bottom: var(--spacing-sm);
  }

  .progress-bar.inline-block {
    width: 60px;
  }
}

@media (min-width: 1920px) {
  .container {
    max-width: 1920px;
    margin: 0 auto;
  }

  .preview-panel {
    max-width: 520px;
  }
}

/* ==========================================================================
   Acessibilidade
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {

  .section,
  .preview-panel,
  .modal,
  .modal-content,
  button,
  .option-tab,
  .tabs button,
  .image-preview .group,
  tr,
  .performance-table td[title]:hover::after,
  .stats,
  .series-stats div,
  .filter-bar,
  .sort-filter,
  .question-item,
  .question-item .expanded-content,
  input[type="checkbox"],
  .form-container .relative i {
    transition: none;
    animation: none;
  }

  .animate-pulse {
    animation: none;
  }
}

.chart-item canvas {
  width: 100% !important;
  max-height: 300px !important;
  display: block !important;
}


/* Animations */
@keyframes slide-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.animate-slide-in {
  animation: slide-in 0.5s ease-out;
}

.animate-stagger > * {
  animation: stagger 0.3s ease-out forwards;
  animation-delay: calc(var(--index) * 0.1s);
}

.animate-stagger > *:nth-child(1) { --index: 1; }
.animate-stagger > *:nth-child(2) { --index: 2; }
.animate-stagger > *:nth-child(3) { --index: 3; }
.animate-stagger > *:nth-child(4) { --index: 4; }

/* Custom Styles */
.progress-bar {
  width: 100%;
  background: #e5e7eb;
  border-radius: 9999px;
  height: 8px;
  overflow: hidden;
}

.progress {
  background: #4f46e5;
  height: 100%;
  transition: width 0.5s ease-in-out;
}

.badge {
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.difficulty-fácil {
  background: #dcfce7;
  color: #166534;
}

.difficulty-médio {
  background: #fefce8;
  color: #854d0e;
}

.difficulty-difícil {
  background: #fee2e2;
  color: #991b1b;
}

/* Glassmorphism Effect */
.bg-glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Dark Mode */
.dark .progress-bar {
  background: #374151;
}

.dark .progress {
  background: #6366f1;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.chart-item {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}
.chart-item canvas {
  width: 100% !important;
  height: 300px !important;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 9999px;
}

::-webkit-scrollbar-thumb {
  background: #4f46e5;
  border-radius: 9999px;
}

.dark ::-webkit-scrollbar-track {
  background: #1f2937;
}

.dark ::-webkit-scrollbar-thumb {
  background: #6366f1;
}
/* Botão de ação dentro do aviso (ex.: Desfazer exclusão) */
.toast-acao { border: 1px solid currentColor; background: transparent; color: inherit; border-radius: 8px; padding: 2px 10px; font-weight: 700; cursor: pointer; white-space: nowrap; }
.toast-acao:hover { background: rgba(0,0,0,.06); }