/* =============================================================================
 * STYLE.CSS - Folha de Estilos do Verificador de Cupons (Multi-Tenant)
 * =============================================================================
 * Paleta de cores padrão (tema NF Solidária):
 *   - Primária escura:   #287462 (botões, destaques fortes)
 *   - Primária média:    #57A292 (borders focus, highlights)
 *   - Fundo login:       #A1D2B7 (background tela de login)
 *
 * Sistema de Temas:
 *   As cores são definidas como variáveis CSS em :root abaixo.
 *   O JavaScript carrega o tema do schema atual via GET /api/tema
 *   e sobrescreve as variáveis CSS dinamicamente.
 *
 * Estrutura:
 *   1. Reset e variáveis CSS
 *   2. Tela de login
 *   3. Sidebar
 *   4. Conteúdo principal
 *   5. Verificador de imagens (layout novo)
 *   6. Responsividade
 * ============================================================================= */

/* ============================================================================= */
/* 1. RESET E VARIÁVEIS CSS */
/* ============================================================================= */

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

:root {
  /* Cores principais */
  --cor-primaria-escura: #287462;
  --cor-primaria-media: #57A292;
  --cor-primaria-opacity: rgba(87, 162, 146, 0.12);
  --cor-fundo-login: #A1D2B7;

  /* Cores de texto */
  --cor-text: #1E293B;
  --cor-text-secondary: #64748B;
  --cor-text-muted: #94A3B8;

  /* Cores de superfície */
  --cor-surface: #FFFFFF;
  --cor-bg: #F1F5F9;
  --cor-border: #E2E8F0;

  /* Cores semânticas */
  --cor-sucesso: #16A34A;
  --cor-sucesso-bg: #F0FDF4;
  --cor-erro: #DC2626;
  --cor-erro-bg: #FEF2F2;
  --cor-aviso: #D97706;
  --cor-aviso-bg: #FFFBEB;

  /* Sidebar */
  --sidebar-width: 240px;
  --sidebar-bg: #1A3C34;
  --sidebar-text: #F8FAFC;
  --sidebar-text-muted: #94A3B8;

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

  /* Bordas */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--cor-text);
  background: var(--cor-bg);
  min-height: 100vh;
}

/* ============================================================================= */
/* 2. TELA DE LOGIN */
/* ============================================================================= */

.screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--cor-fundo-login);
}

.login-container {
  background: var(--cor-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
  width: 100%;
  max-width: 420px;
}

.login-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.login-logo {
  margin-bottom: var(--spacing-md);
}

.login-logo img {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.login-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--cor-primaria-escura);
  margin-bottom: var(--spacing-xs);
}

.login-subtitle {
  font-size: 16px;
  color: var(--cor-text-secondary);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--cor-text);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 12px;
  width: 18px;
  height: 18px;
  color: var(--cor-text-muted);
}

.form-input {
  width: 100%;
  padding: 12px 12px 12px 40px;
  border: 1.5px solid var(--cor-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--cor-text);
  background: var(--cor-bg);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  border-color: var(--cor-primaria-media);
  box-shadow: 0 0 0 3px var(--cor-primaria-opacity);
}

.form-input.has-error {
  border-color: var(--cor-erro);
}

.input-toggle {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--cor-text-muted);
}

.input-toggle:hover {
  color: var(--cor-primaria-escura);
}

.toggle-icon {
  width: 18px;
  height: 18px;
}

.form-error {
  font-size: 12px;
  color: var(--cor-erro);
  min-height: 16px;
}

.alert-error {
  padding: 10px 14px;
  background: var(--cor-erro-bg);
  border: 1px solid rgba(220, 38, 38, 0.3);
  border-radius: var(--radius-md);
  color: var(--cor-erro);
  font-size: 13px;
  font-weight: 500;
}

.alert-success {
  padding: 10px 14px;
  background: var(--cor-sucesso-bg);
  border: 1px solid rgba(22, 163, 74, 0.3);
  border-radius: var(--radius-md);
  color: var(--cor-sucesso);
  font-size: 13px;
  font-weight: 500;
}

.forgot-password {
  display: flex;
  justify-content: center;
  margin-top: 4px;
}

.link-button {
  background: none;
  border: none;
  color: var(--cor-primaria-media);
  font-size: 13px;
  cursor: pointer;
  text-decoration: underline;
}

.link-button:hover {
  color: var(--cor-primaria-escura);
}

.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 14px var(--spacing-md);
  background: var(--cor-primaria-escura);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  width: 100%;
}

.btn-primary:hover {
  background: #1E5C4E;
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ============================================================================= */
/* 3. MODAL */
/* ============================================================================= */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--cor-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 440px;
}

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

.modal-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--cor-text-secondary);
}

.modal-close:hover {
  color: var(--cor-text);
}

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

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--cor-border);
}

/* Botões do modal de invalidação: tamanho igual */
#modal-confirmacao-invalidacao .modal-footer {
  justify-content: stretch;
  gap: 12px;
}

#modal-confirmacao-invalidacao .modal-footer .btn-secondary,
#modal-confirmacao-invalidacao .modal-footer .btn-primary {
  flex: 1;
  text-align: center;
}

.btn-secondary {
  padding: 10px 20px;
  background: var(--cor-bg);
  color: var(--cor-text);
  border: 1px solid var(--cor-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.btn-secondary:hover {
  background: var(--cor-border);
}

/* ============================================================================= */
/* 4. APP LAYOUT E SIDEBAR */
/* ============================================================================= */

.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-header {
  padding: var(--spacing-lg) var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sidebar-logo img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.sidebar-info {
  min-width: 0;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--sidebar-text);
}

.sidebar-subtitle {
  font-size: 12px;
  color: var(--sidebar-text-muted);
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md) 0;
}

.nav-list {
  list-style: none;
}

.nav-item {
  margin: 2px var(--spacing-md);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--sidebar-text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--sidebar-text);
}

.nav-item.active .nav-link {
  background: var(--cor-primaria-escura);
  color: white;
}

.nav-icon {
  width: 20px;
  height: 20px;
}

.sidebar-footer {
  padding: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-width: 0;
  flex: 1;
}

.user-avatar {
  width: 34px;
  height: 34px;
  background: var(--cor-primaria-media);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.user-avatar span {
  font-size: 14px;
  font-weight: 600;
  color: white;
}

.user-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.user-nome {
  font-size: 13px;
  font-weight: 600;
  color: var(--sidebar-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email {
  font-size: 11px;
  color: var(--sidebar-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-logout {
  background: none;
  border: none;
  color: var(--sidebar-text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
}

.btn-logout:hover {
  background: rgba(220, 38, 38, 0.2);
  color: #EF4444;
}

.btn-logout svg {
  width: 20px;
  height: 20px;
}

/* ============================================================================= */
/* 5. CONTEÚDO PRINCIPAL */
/* ============================================================================= */

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: var(--cor-bg);
}

.page {
  display: none;
  flex-direction: column;
  height: 100%;
  padding: var(--spacing-md);
  overflow: hidden;
}

.page.active {
  display: flex;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  flex-shrink: 0;
}

.page-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 22px;
  font-weight: 700;
  color: var(--cor-text);
}

.title-icon {
  width: 24px;
  height: 24px;
  color: var(--cor-primaria-escura);
}

.status-badge {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-weight: 500;
}

.status-badge.busy {
  background: var(--cor-aviso-bg);
  color: var(--cor-aviso);
}

.status-badge.ready {
  background: var(--cor-sucesso-bg);
  color: var(--cor-sucesso);
}

/* Cupom ID no header (lado direito, próximo ao status) */
.cupom-id-header {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  margin-right: var(--spacing-md);
}

.cupom-id-header .cupom-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--cor-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cupom-id-header .cupom-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--cor-text);
}

/* ============================================================================= */
/* 6. VERIFICADOR DE IMAGENS (NOVO LAYOUT) */
/* ============================================================================= */

/* Container principal: imagem ocupa todo o espaço, controles abaixo */
.verificador-container {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--spacing-md);
  min-height: 0;
  overflow: hidden;
}

/* Área da imagem: ocupa todo o espaço restante */
.verificador-imagem {
  flex: 1;
  position: relative;
  background: var(--cor-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  min-height: 0;
}

/* Toolbar flutuante: posicionada no canto superior esquerdo da imagem */
.imagem-toolbar {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.toolbar-btn {
  background: none;
  border: 1.5px solid var(--cor-border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cor-text-secondary);
  transition: all 0.2s;
}

.toolbar-btn:hover {
  border-color: var(--cor-primaria-media);
  color: var(--cor-primaria-escura);
  background: var(--cor-primaria-opacity);
}

.toolbar-btn svg {
  width: 16px;
  height: 16px;
}

/* Labels de texto nos botões da toolbar */
.toolbar-btn-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--cor-text-secondary);
  user-select: none;
  line-height: 1;
}



/* ============================================================================= */
/* MEMORIZADOR DE CARACTERES */
/* ============================================================================= */
.memorizador-container {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  padding: 6px 12px;
  background: var(--cor-bg);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--cor-border);
}

.memorizador-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--cor-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.memorizador-controles {
  display: flex;
  align-items: center;
  gap: 8px;
}

.memorizador-checkbox-label {
  display: flex;
  align-items: center;
}

.memorizador-checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--cor-primaria-escura);
  cursor: pointer;
}

.memorizador-contador {
  display: flex;
  align-items: center;
  gap: 4px;
}

.memorizador-btn {
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--cor-border);
  border-radius: var(--radius-sm);
  background: var(--cor-surface);
  color: var(--cor-text);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.memorizador-btn:hover {
  border-color: var(--cor-primaria-media);
  background: var(--cor-primaria-opacity);
}

.memorizador-input {
  width: 48px;
  height: 28px;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  border: 1.5px solid var(--cor-border);
  border-radius: var(--radius-sm);
  background: var(--cor-surface);
  color: var(--cor-text);
  outline: none;
}

.memorizador-input:focus {
  border-color: var(--cor-primaria-media);
  box-shadow: 0 0 0 2px var(--cor-primaria-opacity);
}

/* Botão Limpar - cor laranja */
#btn-limpar-chave {
  background: #FF8C00;
  color: white;
  border: 1.5px solid rgba(255, 140, 0, 0.3);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
  min-width: 140px;
}

#btn-limpar-chave:hover {
  background: #E67E00;
}

#btn-limpar-chave .atalho-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
}

#btn-limpar-chave:hover .atalho-key {
  background: rgba(255, 255, 255, 0.3);
}

.toolbar-btn:hover .toolbar-btn-text {
  color: var(--cor-primaria-escura);
}

.zoom-display {
  font-size: 12px;
  font-weight: 600;
  color: var(--cor-text-secondary);
  min-width: 40px;
  text-align: center;
}

.toolbar-separator {
  width: 1px;
  height: 20px;
  background: var(--cor-border);
  margin: 0 4px;
}

/* Área de exibição da imagem: preenche todo o container */
/* overflow:auto garante barras de rolagem quando a imagem excede o container */
.imagem-area {
  width: 100%;
  height: 100%;
  overflow: auto;
  background: #F8FAFC;
  position: relative;
}

/* Imagem: tamanho controlado via width/height pelo JS para overflow funcionar */
.imagem-area img {
  display: block;
  cursor: grab;
  user-select: none;
  -webkit-user-drag: none;
}

.imagem-area img:active {
  cursor: grabbing;
}

.imagem-placeholder {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--cor-text-muted);
  z-index: 5;
}

.placeholder-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
}

.imagem-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--cor-text-secondary);
  z-index: 5;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--cor-border);
  border-top-color: var(--cor-primaria-media);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto var(--spacing-md);
}

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

/* ============================================================================= */
/* 6.1 BARRA DE CONTROLES (ABAIXO DA IMAGEM) */
/* ============================================================================= */

.verificador-controles {
  background: var(--cor-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  flex-shrink: 0;
}

/* Linha superior: info do cupom + campos da chave */
.controles-linha-superior {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  max-width: 100%;
  flex-wrap: wrap;
}

.cupom-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.cupom-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--cor-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cupom-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--cor-text);
}

/* Campos da chave em uma única linha */
.chave-container {
  flex: 1;
  min-width: 0;
}

.chave-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--cor-text);
  margin-bottom: 2px;
}

.chave-hint {
  font-size: 11px;
  color: var(--cor-text-muted);
  margin-bottom: 6px;
}

/* Campo único com máscara para a chave de acesso (400px de largura) */
.chave-input-unico {
  width: 700px;
  max-width: 100%;
  height: 36px;
  font-size: 16px;
  font-weight: 600;
  font-family: 'Courier New', monospace;
  letter-spacing: 2px;
  border: 1.5px solid var(--cor-border);
  border-radius: var(--radius-md);
  padding: 0 12px;
  background: var(--cor-bg);
  color: var(--cor-text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}

.chave-input-unico:focus {
  border-color: var(--cor-primaria-media);
  box-shadow: 0 0 0 3px var(--cor-primaria-opacity);
}

.chave-input-unico::placeholder {
  color: var(--cor-text-muted);
  opacity: 0.6;
}

/* Linha inferior: botões de ação (todos no mesmo container) */
.controles-linha-inferior {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Título fica acima dos botões */
.invalidacao-titulo {
  font-size: 13px;
  font-weight: 600;
  color: var(--cor-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  margin-top: 16px;
}

/* Todos os botões ficam em um grid único de 5 colunas (4 invalidar + 1 validar) */
.controles-botoes-todos {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-invalidar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  background: var(--cor-erro-bg);
  color: var(--cor-erro);
  border: 1.5px solid rgba(220, 38, 38, 0.2);
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  justify-content: center;
  white-space: nowrap;
  min-width: 140px;
}

.btn-validar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 6px 8px;
  background: var(--cor-sucesso);
  color: white;
  border: 1.5px solid rgba(22, 163, 74, 0.3);
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
  min-width: 140px;
}

.btn-validar:hover {
  background: #15803D;
}

.btn-validar:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-validar svg {
  width: 18px;
  height: 18px;
}

.btn-invalidar:hover {
  background: var(--cor-erro);
  color: white;
  border-color: var(--cor-erro);
}

.btn-invalidar:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.atalho-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: rgba(220, 38, 38, 0.15);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
}

.btn-invalidar:hover .atalho-key {
  background: rgba(255, 255, 255, 0.2);
}

/* Feedback */
.feedback {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  text-align: center;
  animation: fadeIn 0.3s ease;
  margin-top: var(--spacing-sm);
}

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

.feedback.success {
  background: var(--cor-sucesso-bg);
  color: var(--cor-sucesso);
  border: 1px solid rgba(22, 163, 74, 0.3);
}

.feedback.error {
  background: var(--cor-erro-bg);
  color: var(--cor-erro);
  border: 1px solid rgba(220, 38, 38, 0.3);
}

.feedback.warning {
  background: var(--cor-aviso-bg);
  color: var(--cor-aviso);
  border: 1px solid rgba(217, 119, 6, 0.3);
}

/* Dica de atalhos */
.atalhos-help {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--cor-surface);
  border-radius: var(--radius-md);
  font-size: 12px;
  color: var(--cor-text-secondary);
  text-align: center;
  flex-shrink: 0;
}

.atalhos-help kbd {
  display: inline-block;
  padding: 2px 6px;
  background: #F1F5F9;
  border: 1px solid var(--cor-border);
  border-radius: 4px;
  font-family: monospace;
  font-size: 11px;
  font-weight: 600;
}

/* ============================================================================= */
/* 7. RESPONSIVIDADE */
/* ============================================================================= */

@media (max-width: 1200px) {
  .invalidacao-botoes {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .controles-linha-superior {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .chave-input-unico {
    width: 100%;
  }

  .memorizador-container {
    flex-direction: row;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
  }

  .controles-linha-inferior {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .invalidacao-botoes {
    grid-template-columns: repeat(2, 1fr);
  }
}