/* ============================================================
   COMPONENTES UNIFICADOS — Sistema de UI
   Conexão Jaú — Sistema SaaS Educacional
   Botões, inputs, cards, alertas, tabelas, badges, modais,
   empty states, breadcrumbs, filtros, paginação, skeletons,
   avatares, dropdowns, toggles, tabs, toasts, spinners
   UTF-8 sem BOM — não modificar encoding
   ============================================================ */

/* ============================================================
   BOTÕES
   ============================================================ */
.ui-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
  font-family: var(--font-family);
}

.ui-btn:disabled,
.ui-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.ui-btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* Variantes de cor */
.ui-btn-primary {
  background: var(--color-primary-600);
  color: #ffffff;
  border-color: var(--color-primary-600);
}
.ui-btn-primary:hover {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
  color: #ffffff;
}

.ui-btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-default);
}
.ui-btn-secondary:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

.ui-btn-danger {
  background: var(--color-danger-600);
  color: #ffffff;
  border-color: var(--color-danger-600);
}
.ui-btn-danger:hover {
  background: var(--color-danger-700);
  border-color: var(--color-danger-700);
  color: #ffffff;
}

.ui-btn-success {
  background: var(--color-success-600);
  color: #ffffff;
  border-color: var(--color-success-600);
}
.ui-btn-success:hover {
  background: var(--color-success-700);
  border-color: var(--color-success-700);
  color: #ffffff;
}

.ui-btn-warning {
  background: var(--color-warning-500);
  color: #ffffff;
  border-color: var(--color-warning-500);
}
.ui-btn-warning:hover {
  background: var(--color-warning-600);
  border-color: var(--color-warning-600);
  color: #ffffff;
}

.ui-btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.ui-btn-ghost:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

.ui-btn-outline-primary {
  background: transparent;
  color: var(--color-primary-600);
  border-color: var(--color-primary-600);
}
.ui-btn-outline-primary:hover {
  background: var(--color-primary-50);
}

/* Variantes de tamanho */
.ui-btn-sm {
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-xs);
  gap: var(--spacing-1);
}
.ui-btn-lg {
  padding: 0.625rem 1.5rem;
  font-size: var(--font-size-base);
}
.ui-btn-xl {
  padding: 0.75rem 2rem;
  font-size: var(--font-size-lg);
}
.ui-btn-full {
  width: 100%;
}

/* Botão com ícone apenas */
.ui-btn-icon {
  padding: var(--spacing-2);
  aspect-ratio: 1;
}
.ui-btn-icon.ui-btn-sm {
  padding: var(--spacing-1);
}

/* ============================================================
   INPUTS, TEXTAREA, SELECT
   ============================================================ */
.ui-input,
.ui-textarea,
.ui-select {
  width: 100%;
  padding: var(--spacing-2) 0.75rem;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
  font-family: var(--font-family);
  line-height: 1.5;
}

.ui-input:focus,
.ui-textarea:focus,
.ui-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.15);
}

.ui-input::placeholder,
.ui-textarea::placeholder {
  color: var(--text-disabled);
}

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

.ui-select {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' viewBox='0 0 24 24'%3E%3Cpath stroke='%2364748b' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
}

.ui-input:disabled,
.ui-textarea:disabled,
.ui-select:disabled {
  background: var(--bg-muted);
  color: var(--text-disabled);
  opacity: 0.6;
  cursor: not-allowed;
}

/* Input com ícone à esquerda */
.ui-input-group {
  position: relative;
}
.ui-input-group .ui-input {
  padding-left: 2.5rem;
}
.ui-input-group .ui-input-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 16px;
  height: 16px;
}

/* Input erro */
.ui-input-error {
  border-color: var(--color-danger-500);
}
.ui-input-error:focus {
  border-color: var(--color-danger-500);
  box-shadow: 0 0 0 3px rgb(239 68 68 / 0.15);
}

/* Labels e hints */
.ui-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-label);
  margin-bottom: 0.375rem;
}

.ui-label-required::after {
  content: ' *';
  color: var(--color-danger-500);
}

.ui-help {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.ui-error-msg {
  font-size: var(--font-size-xs);
  color: var(--color-danger-600);
  margin-top: 0.25rem;
}

/* ============================================================
   CARDS
   ============================================================ */
.ui-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.ui-card-hover {
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}
.ui-card-hover:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.ui-card-header {
  padding: var(--spacing-4) var(--spacing-6);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
}

.ui-card-body {
  padding: var(--spacing-6);
}

.ui-card-footer {
  padding: var(--spacing-4) var(--spacing-6);
  border-top: 1px solid var(--border-default);
  background: var(--bg-subtle);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.ui-card-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semi);
  color: var(--text-primary);
}

.ui-card-subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: 0.125rem;
}

/* ============================================================
   TABELAS
   ============================================================ */
.ui-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.ui-data-table-th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semi);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-default);
  white-space: nowrap;
}

.ui-data-table-th:first-child { border-radius: 0; }

.ui-data-table-td {
  padding: 0.875rem 1rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-default);
  vertical-align: middle;
}

.ui-hover-row:hover td {
  background: var(--bg-card-hover);
}

.ui-data-table tbody tr:last-child td {
  border-bottom: none;
}

/* Wrapper responsivo padrão */
.ui-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ============================================================
   BADGES
   ============================================================ */
.ui-badge-success,
.ui-badge-danger,
.ui-badge-warning,
.ui-badge-primary,
.ui-badge-secondary,
.ui-badge-info {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.125rem 0.625rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  line-height: 1.5;
}

.ui-badge-success   { background: var(--color-success-100); color: var(--color-success-700); }
.ui-badge-danger    { background: var(--color-danger-100);  color: var(--color-danger-700); }
.ui-badge-warning   { background: var(--color-warning-100); color: var(--color-warning-700); }
.ui-badge-primary   { background: var(--color-primary-100); color: var(--color-primary-700); }
.ui-badge-secondary { background: var(--color-gray-100);    color: var(--color-gray-700); }
.ui-badge-info      { background: var(--color-info-100);    color: var(--color-info-700); }

/* Ponto indicador nos badges */
.ui-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

/* ============================================================
   ALERTAS
   ============================================================ */
.ui-alert-success,
.ui-alert-danger,
.ui-alert-warning,
.ui-alert-info {
  padding: 0.875rem 1rem;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  line-height: 1.5;
}

.ui-alert-success { background: var(--color-success-50); border: 1px solid var(--color-success-100); color: var(--color-success-700); }
.ui-alert-danger  { background: var(--color-danger-50);  border: 1px solid var(--color-danger-100);  color: var(--color-danger-700); }
.ui-alert-warning { background: var(--color-warning-50); border: 1px solid var(--color-warning-100); color: var(--color-warning-700); }
.ui-alert-info    { background: var(--color-info-50);    border: 1px solid var(--color-info-100);    color: var(--color-info-600); }

.ui-alert-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ============================================================
   MODAIS
   ============================================================ */
/* .ui-modal — container fixo, centralizador via flex
   Uso:
     <div class="ui-modal" style="display:none;">
       <div class="ui-modal-wrapper">          ← overlay escuro (filho absoluto)
         <div class="ui-modal-content">...</div>  ← caixa centralizada
       </div>
     </div>
   Abrir: modal.style.display = 'flex'
   Fechar: modal.style.display = 'none'          */
.ui-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
}

/* overlay escuro — centraliza o .ui-modal-content e aplica o fundo semitransparente.
   Quando usado como filho de .ui-modal: position:absolute (relativo ao pai fixo).
   Quando usado como elemento raiz (legado): position:fixed cobre toda a tela.
   Em ambos os casos, display:flex centraliza o .ui-modal-content. */
.ui-modal-wrapper {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
  z-index: var(--z-modal);
}

/* quando filho de .ui-modal, herda o z-index do pai e usa posição absoluta */
.ui-modal > .ui-modal-wrapper {
  position: absolute;
  z-index: auto;
}

.ui-modal-content {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 560px;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  animation: modalIn 0.2s ease;
}

.ui-modal-content.ui-modal-sm  { max-width: 400px; }
.ui-modal-content.ui-modal-lg  { max-width: 720px; }
.ui-modal-content.ui-modal-xl  { max-width: 960px; }
.ui-modal-content.ui-modal-full { max-width: calc(100vw - 2rem); }

.ui-modal-header {
  padding: var(--spacing-5) var(--spacing-6);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
}

.ui-modal-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semi);
  color: var(--text-primary);
}

.ui-modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.ui-modal-close:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

.ui-modal-body {
  padding: var(--spacing-6);
}

.ui-modal-footer {
  padding: var(--spacing-4) var(--spacing-6);
  border-top: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-3);
  background: var(--bg-subtle);
  border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.ui-empty-state {
  text-align: center;
  padding: 3rem var(--spacing-6);
}

.ui-empty-state-icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto var(--spacing-4);
  color: var(--text-muted);
  opacity: 0.6;
}

.ui-empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semi);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.ui-empty-state-description {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  max-width: 360px;
  margin: 0 auto var(--spacing-5);
  line-height: var(--line-height-relaxed);
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.ui-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  flex-wrap: wrap;
}

.ui-breadcrumb a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}
.ui-breadcrumb a:hover {
  color: var(--text-primary);
}

.ui-breadcrumb .active {
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
}

.ui-breadcrumb-sep {
  color: var(--border-default);
  user-select: none;
}

/* ============================================================
   FILTER PILLS
   ============================================================ */
.ui-filter-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  cursor: pointer;
  border: 1px solid var(--border-default);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  user-select: none;
  white-space: nowrap;
}

.ui-filter-pill:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

.ui-filter-pill.active,
.ui-filter-pill-active {
  background: var(--color-primary-600);
  color: #ffffff;
  border-color: var(--color-primary-600);
}

.ui-filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

/* ============================================================
   STAT / SCORE CARDS
   ============================================================ */
.ui-score-card {
  padding: var(--spacing-5);
  border-radius: var(--radius-xl);
  border: 1px solid transparent;
}

.ui-score-card.success {
  background: var(--color-success-50);
  border-color: var(--color-success-100);
}
.ui-score-card.warning {
  background: var(--color-warning-50);
  border-color: var(--color-warning-100);
}
.ui-score-card.danger {
  background: var(--color-danger-50);
  border-color: var(--color-danger-100);
}
.ui-score-card.primary {
  background: var(--color-primary-50);
  border-color: var(--color-primary-100);
}

/* ── Icon backgrounds semânticos ── */
.ui-icon-bg-primary   { background: var(--color-primary-50);  color: var(--color-primary-600); }
.ui-icon-bg-success   { background: var(--color-success-50);  color: var(--color-success-600); }
.ui-icon-bg-danger    { background: var(--color-danger-50);   color: var(--color-danger-600); }
.ui-icon-bg-warning   { background: var(--color-warning-50);  color: var(--color-warning-600); }
.ui-icon-bg-info      { background: var(--color-info-50);     color: var(--color-info-600); }
.ui-icon-bg-secondary { background: var(--color-gray-100);    color: var(--color-gray-600); }

/* ============================================================
   CORES SEMÂNTICAS — Classes utilitárias
   ============================================================ */

/* Texto */
.ui-text-primary   { color: var(--text-primary); }
.ui-text-secondary { color: var(--text-secondary); }
.ui-text-muted     { color: var(--text-muted); }
.ui-text-label     { color: var(--text-label); }
.ui-text-disabled  { color: var(--text-disabled); }
.ui-text-inverse   { color: var(--text-inverse); }

/* Background */
.ui-bg-card    { background: var(--bg-card); }
.ui-bg-primary { background: var(--bg-app); }
.ui-bg-muted   { background: var(--bg-muted); }
.ui-bg-subtle  { background: var(--bg-subtle); }
.ui-bg-hover   { background: var(--bg-card-hover); }

/* Bordas */
.ui-border-default { border-color: var(--border-default); }
.ui-border-input   { border-color: var(--border-input); }

/* Divisores */
.ui-divide-default > * + * {
  border-top: 1px solid var(--border-default);
}

/* ============================================================
   SPINNER DE CARREGAMENTO
   ============================================================ */
.ui-spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--border-default);
  border-top-color: var(--color-primary-600);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  flex-shrink: 0;
}

.ui-spinner-sm { width: 1rem; height: 1rem; }
.ui-spinner-lg { width: 2rem; height: 2rem; border-width: 3px; }
.ui-spinner-xl { width: 3rem; height: 3rem; border-width: 3px; }

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

/* Estado de carregamento centralizado */
.ui-loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  gap: var(--spacing-3);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* ============================================================
   TOAST / NOTIFICAÇÕES
   ============================================================ */
.ui-toast-container {
  position: fixed;
  bottom: var(--spacing-6);
  right: var(--spacing-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  max-width: 360px;
  width: calc(100vw - 3rem);
  pointer-events: none;
}

.ui-toast {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  animation: slideInRight 0.2s ease;
  pointer-events: auto;
  cursor: pointer;
}

.ui-toast-success { border-left: 4px solid var(--color-success-500); }
.ui-toast-danger  { border-left: 4px solid var(--color-danger-500); }
.ui-toast-warning { border-left: 4px solid var(--color-warning-500); }
.ui-toast-info    { border-left: 4px solid var(--color-info-500); }

.ui-toast-icon { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }
.ui-toast-icon.success { color: var(--color-success-600); }
.ui-toast-icon.danger  { color: var(--color-danger-600); }
.ui-toast-icon.warning { color: var(--color-warning-600); }
.ui-toast-icon.info    { color: var(--color-info-600); }

.ui-toast-body { flex: 1; min-width: 0; }
.ui-toast-title { font-size: var(--font-size-sm); font-weight: var(--font-weight-semi); color: var(--text-primary); }
.ui-toast-msg   { font-size: var(--font-size-xs); color: var(--text-muted); margin-top: 0.125rem; }

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

/* ============================================================
   TABS
   ============================================================ */
.ui-tabs-wrapper {
  border-bottom: 1px solid var(--border-default);
  display: flex;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.ui-tabs-wrapper::-webkit-scrollbar { display: none; }

.ui-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.625rem 1rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  background: transparent;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: var(--font-family);
  margin-bottom: -1px;
}

.ui-tab-btn:hover {
  color: var(--text-primary);
}

.ui-tab-btn.active {
  color: var(--color-primary-600);
  border-bottom-color: var(--color-primary-600);
}

.ui-tab-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 0.25rem;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: var(--font-weight-semi);
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.ui-tab-btn.active .ui-tab-count {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

/* ============================================================
   TOGGLE / SWITCH
   ============================================================ */
.ui-toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.ui-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.ui-toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-normal);
}

.ui-toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  left: 3px;
  top: 3px;
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.ui-toggle input:checked + .ui-toggle-slider {
  background: var(--color-primary-600);
}

.ui-toggle input:checked + .ui-toggle-slider::before {
  transform: translateX(20px);
}

.ui-toggle input:disabled + .ui-toggle-slider {
  opacity: 0.5;
  cursor: not-allowed;
}

.ui-toggle input:focus-visible + .ui-toggle-slider {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* ============================================================
   FORM SECTIONS
   ============================================================ */
.ui-form-section {
  margin-bottom: var(--spacing-6);
}

.ui-form-section-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semi);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-3);
  border-bottom: 1px solid var(--border-default);
}

.ui-form-group {
  margin-bottom: var(--spacing-5);
}

.ui-form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-4);
}

@media (min-width: 640px) {
  .ui-form-row-2 { grid-template-columns: repeat(2, 1fr); }
  .ui-form-row-3 { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   PAGINAÇÃO
   ============================================================ */
.ui-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-1);
  flex-wrap: wrap;
}

.ui-page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  border: 1px solid var(--border-default);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  font-family: var(--font-family);
}

.ui-page-btn:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

.ui-page-btn.active {
  background: var(--color-primary-600);
  color: #ffffff;
  border-color: var(--color-primary-600);
}

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

/* ============================================================
   SKELETON LOADING
   ============================================================ */
.ui-skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-muted) 25%,
    var(--bg-subtle) 50%,
    var(--bg-muted) 75%
  );
  background-size: 200% 100%;
  animation: skeleton 1.5s infinite;
  border-radius: var(--radius-md);
}

.ui-skeleton-text      { height: 14px; }
.ui-skeleton-title     { height: 20px; }
.ui-skeleton-avatar    { border-radius: 50%; }
.ui-skeleton-btn       { height: 36px; width: 100px; }
.ui-skeleton-card      { height: 120px; border-radius: var(--radius-xl); }

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

/* ============================================================
   AVATAR
   ============================================================ */
.ui-avatar {
  border-radius: 50%;
  object-fit: cover;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semi);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  flex-shrink: 0;
  text-transform: uppercase;
  user-select: none;
}

.ui-avatar-xs { width: 24px; height: 24px; font-size: 0.65rem; }
.ui-avatar-sm { width: 32px; height: 32px; font-size: var(--font-size-xs); }
.ui-avatar-md { width: 40px; height: 40px; font-size: var(--font-size-sm); }
.ui-avatar-lg { width: 56px; height: 56px; font-size: var(--font-size-lg); }
.ui-avatar-xl { width: 80px; height: 80px; font-size: var(--font-size-2xl); }

/* ============================================================
   DROPDOWN
   ============================================================ */
.ui-dropdown {
  position: relative;
  display: inline-block;
}

.ui-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  z-index: var(--z-dropdown);
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 0.375rem;
  animation: fadeInDown 0.1s ease;
}
.ui-dropdown-menu.open {
  display: block;
}

.ui-dropdown-menu.left { right: auto; left: 0; }
.ui-dropdown-menu.top  { top: auto; bottom: calc(100% + 4px); }

.ui-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: var(--spacing-2) 0.75rem;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-family: var(--font-family);
}

.ui-dropdown-item:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

.ui-dropdown-item.danger {
  color: var(--color-danger-600);
}
.ui-dropdown-item.danger:hover {
  background: var(--color-danger-50);
  color: var(--color-danger-700);
}

.ui-dropdown-divider {
  margin: 0.25rem 0;
  border: none;
  border-top: 1px solid var(--border-default);
}

.ui-dropdown-label {
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semi);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   GRÁFICOS — Containers padronizados
   ============================================================ */
.ui-chart-container {
  width: 100%;
  height: var(--chart-height-md);
  position: relative;
}

.ui-chart-container.sm { height: var(--chart-height-sm); }
.ui-chart-container.lg { height: var(--chart-height-lg); }

/* ============================================================
   RESPONSIVIDADE — Mobile overrides
   ============================================================ */
@media (max-width: 767px) {
  .ui-modal-content {
    margin: var(--spacing-2);
    max-width: calc(100vw - var(--spacing-4));
  }

  .ui-btn-xl {
    padding: 0.625rem 1.5rem;
    font-size: var(--font-size-base);
  }

  .ui-toast-container {
    left: var(--spacing-4);
    right: var(--spacing-4);
    bottom: var(--spacing-4);
    width: auto;
    max-width: none;
  }
}

@media (max-width: 479px) {
  .ui-modal {
    padding: 0;
    align-items: flex-end;
  }
  .ui-modal-content {
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
    max-width: 100vw;
    margin: 0;
  }
}

/* ============================================================
   UTILITY — hidden state
   Usado por modais e outros componentes para ocultar via classe.
   ============================================================ */
.hidden { display: none !important; }