/* ═══════════════════════════════════════════════════════════════════════════
   ChatCapivara — CSS Principal
   Tema claro, clean e profissional
   Paleta: #2B1A0E | #6B3A0F | #8C5A2B | #F2E6D9
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── TOKENS DE DESIGN ───────────────────────────────────────────────────── */
:root {
  /* Paleta */
  --marrom-escuro:    #2B1A0E;
  --marrom-principal: #6B3A0F;
  --marrom-medio:     #8C5A2B;
  --marrom-claro:     #B07840;
  --bege-claro:       #F2E6D9;
  --bege-medio:       #E8D5C0;
  --bege-escuro:      #D4B896;

  /* Interface clara */
  --bg-app:           #FAFAF7;
  --bg-sidebar:       #F5EDE1;
  --bg-sidebar-hover: #EDD8C0;
  --bg-chat:          #FAFAF7;
  --bg-input:         #FFFFFF;
  --bg-mensagem-ia:   transparent;
  --bg-mensagem-user: #6B3A0F;
  --bg-card:          #FFFFFF;

  /* Texto */
  --texto-primario:   #1C0E05;
  --texto-secundario: #5C3A1E;
  --texto-muted:      #9C7050;
  --texto-user-msg:   #FFFFFF;

  /* Bordas */
  --borda:            #E0C9AC;
  --borda-input:      #D4B896;
  --borda-focus:      #8C5A2B;

  /* Sombras */
  --sombra-sm:        0 1px 3px rgba(107,58,15,0.08);
  --sombra-md:        0 4px 16px rgba(107,58,15,0.12);
  --sombra-lg:        0 12px 40px rgba(107,58,15,0.16);

  /* Dimensões */
  --sidebar-width:    280px;
  --max-chat-width:   760px;
  --raio:             10px;
  --raio-grande:      16px;
  --raio-msg:         18px;
  --raio-pill:        50px;

  /* Animações */
  --transicao:        0.18s ease;
  --transicao-lenta:  0.3s ease;

  /* Botões */
  --btn-primario:     #6B3A0F;
  --btn-primario-hover: #8C5A2B;
  --btn-primario-texto: #FFFFFF;
}

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

html { font-size: 16px; height: 100%; }

body {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-app);
  color: var(--texto-primario);
  height: 100%;
  overflow: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── LAYOUT ─────────────────────────────────────────────────────────────── */
#app {
  display: flex;
  height: 100vh;
  height: 100dvh; /* mobile: exclui barra do browser */
  overflow: hidden;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SIDEBAR
   ═══════════════════════════════════════════════════════════════════════════ */
#sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--borda);
  transition: transform var(--transicao-lenta), width var(--transicao-lenta), min-width var(--transicao-lenta);
  z-index: 100;
  overflow: hidden;
}

#sidebar.fechada {
  transform: translateX(calc(-1 * var(--sidebar-width)));
  width: 0;
  min-width: 0;
  border-right-width: 0;
}

/* Header da sidebar */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 14px;
  border-bottom: 1px solid var(--borda);
  gap: 10px;
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex: 1;
  min-width: 0;
}

.sidebar-logo img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 10px;
}

.sidebar-logo-nome {
  font-size: 16px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1;
}

.sidebar-logo-nome .chat    { color: var(--texto-primario); font-weight: 500; }
.sidebar-logo-nome .capivara { color: var(--marrom-principal); font-weight: 800; }

/* Botão fechar sidebar (dentro da sidebar) */
.btn-sidebar-fechar {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--texto-muted);
  width: 32px;
  height: 32px;
  border-radius: var(--raio);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transicao);
}

.btn-sidebar-fechar:hover { background: var(--bg-sidebar-hover); color: var(--texto-primario); }
.btn-sidebar-fechar svg   { width: 20px; height: 20px; }

/* Botão nova conversa (nav item dentro da lista) */
.btn-nova-conversa {
  display: flex;
  align-items: center;
  gap: 9px;
  background: transparent;
  border: none;
  color: var(--texto-secundario);
  width: 100%;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border-radius: var(--raio);
  transition: all var(--transicao);
  text-align: left;
  margin-bottom: 4px;
}

.btn-nova-conversa:hover {
  background: var(--bg-sidebar-hover);
  border-color: var(--marrom-claro);
  color: var(--texto-primario);
}

.btn-nova-conversa svg { width: 15px; height: 15px; flex-shrink: 0; }

/* Lista de conversas */
.sidebar-conversas {
  flex: 1;
  overflow-y: auto;
  padding: 6px 8px;
}

.secao-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--texto-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 8px 4px;
}

.conversa-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--raio);
  cursor: pointer;
  transition: background var(--transicao);
  position: relative;
}

.conversa-item:hover  { background: var(--bg-sidebar-hover); }
.conversa-item.ativa  { background: rgba(107,58,15,0.12); }

.conversa-titulo {
  flex: 1;
  font-size: 13px;
  color: var(--texto-secundario);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.conversa-item.ativa .conversa-titulo,
.conversa-item:hover .conversa-titulo { color: var(--texto-primario); }

.conversa-acoes { display: none; gap: 4px; flex-shrink: 0; }
.conversa-item:hover .conversa-acoes { display: flex; }

.btn-acao-conversa {
  background: transparent;
  border: none;
  color: var(--texto-muted);
  cursor: pointer;
  padding: 3px 4px;
  border-radius: 6px;
  transition: all var(--transicao);
  display: flex;
  align-items: center;
}

.btn-acao-conversa:hover { background: var(--bege-escuro); color: var(--texto-primario); }
.btn-acao-conversa svg  { width: 14px; height: 14px; }

/* Context menu da conversa */
.context-menu {
  position: absolute;
  right: 8px;
  top: calc(100% + 2px);
  background: var(--bg-card);
  border: 1px solid var(--borda);
  border-radius: var(--raio);
  box-shadow: var(--sombra-md);
  z-index: 200;
  min-width: 160px;
  padding: 4px;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--texto-secundario);
  cursor: pointer;
  border-radius: 6px;
  border: none;
  background: none;
  width: 100%;
  font-family: inherit;
  text-decoration: none;
  transition: background var(--transicao);
}

.context-menu-item:hover { background: var(--bg-sidebar-hover); color: var(--texto-primario); }
.context-menu-item.perigo { color: #C0392B; }
.context-menu-item.perigo:hover { background: #fdecea; }
.context-menu-item svg { width: 14px; height: 14px; flex-shrink: 0; }

/* Footer da sidebar */
.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--borda);
  flex-shrink: 0;
}

.usuario-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--raio);
  cursor: pointer;
  transition: background var(--transicao);
}

.usuario-info:hover { background: var(--bg-sidebar-hover); }

.usuario-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--marrom-principal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
  overflow: hidden;
}

.usuario-avatar img { width: 100%; height: 100%; object-fit: cover; }

.usuario-dados { flex: 1; min-width: 0; }

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

.usuario-plano { font-size: 11px; color: var(--texto-muted); }

/* Sidebar — estado sem login */
.sidebar-login-prompt {
  padding: 20px 12px;
  text-align: center;
}

.sidebar-login-prompt p {
  font-size: 13px;
  color: var(--texto-muted);
  line-height: 1.5;
  margin-bottom: 12px;
}

/* Overlay mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(28,14,5,0.4);
  z-index: 99;
  backdrop-filter: blur(2px);
}

.sidebar-overlay.visivel { display: block; }

/* ═══════════════════════════════════════════════════════════════════════════
   ÁREA DO CHAT
   ═══════════════════════════════════════════════════════════════════════════ */
#chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-chat);
}

/* Modo boas-vindas: tela inicial com tudo centralizado */
#chat-area.modo-boas-vindas {
  overflow-y: auto;
}
#chat-area.modo-boas-vindas #welcome-screen {
  margin-top: auto;
}
#chat-area.modo-boas-vindas #prompts-area {
  margin-bottom: auto;
}

/* ─── RODAPÉ DE NAVEGAÇÃO (só na welcome screen) ────────────────────────── */
.nav-footer {
  display: none; /* oculto por padrão (modo chat) */
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  padding: 10px 20px 14px;
  background: var(--bg-chat);
  font-size: 11px;
  line-height: 1.4;
}
.nav-footer a {
  color: var(--texto-muted);
  text-decoration: none;
  transition: color 0.15s;
  white-space: nowrap;
}
.nav-footer a:hover {
  color: var(--texto-secundario);
}
.nav-footer .nav-sep {
  color: var(--borda);
  user-select: none;
}
/* Mostrar apenas quando a tela inicial estiver ativa */
#chat-area.modo-boas-vindas .nav-footer {
  display: flex;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--borda);
  gap: 12px;
  flex-shrink: 0;
  background: var(--bg-chat);
}

.btn-toggle-sidebar {
  background: transparent;
  border: none;
  color: var(--texto-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--raio);
  transition: all var(--transicao);
  align-items: center;
  /* Oculto por padrão — sidebar está aberta */
  display: none;
}

/* Reaparece apenas quando sidebar está fechada */
#app:has(#sidebar.fechada) .btn-toggle-sidebar { display: flex; }

.btn-toggle-sidebar:hover { background: var(--bege-medio); color: var(--texto-primario); }
.btn-toggle-sidebar svg   { width: 20px; height: 20px; }

.topbar-titulo {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  color: var(--texto-primario);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-acoes { display: flex; gap: 8px; align-items: center; }

/* ─── MENSAGENS ──────────────────────────────────────────────────────────── */
#mensagens-area {
  flex: 1;
  overflow-y: auto;
  padding: 0 0 8px;
  display: flex;
  flex-direction: column;
}

/* Wrapper de cada mensagem — primeiro filho ganha padding-top */
.mensagem-wrapper {
  max-width: var(--max-chat-width);
  margin: 0 auto;
  padding: 4px 24px;
  width: 100%;
}

.mensagem-wrapper:first-child { padding-top: 24px; }

/* Mensagem do usuário — alinhada à direita, bolha marrom */
.mensagem-usuario-wrapper {
  display: flex;
  justify-content: flex-end;
  margin: 6px 0;
}

.mensagem-usuario-wrapper .mensagem-bolha {
  background: var(--bege-medio);
  color: var(--texto-primario);
  padding: 11px 16px;
  border-radius: var(--raio-msg);
  font-size: 14px;
  line-height: 1.6;
  max-width: 68%;
  word-break: break-word;
  white-space: pre-wrap;
}

/* Mensagem da IA — alinhada à esquerda, sem bolha */
.mensagem-ia-wrapper {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin: 8px 0;
}

.ia-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  margin-top: 2px;
  background: var(--bege-medio);
  border: 1px solid var(--borda);
}

.ia-avatar img { width: 100%; height: 100%; object-fit: cover; }

.mensagem-ia {
  flex: 1;
  min-width: 0;
}

.mensagem-ia-wrapper .mensagem-bolha {
  font-size: 14px;
  line-height: 1.75;
  color: var(--texto-primario);
  word-break: break-word;
  white-space: pre-wrap;
}

.mensagem-ia-wrapper .mensagem-bolha.erro {
  color: #C0392B;
  background: #fdecea;
  padding: 10px 14px;
  border-radius: var(--raio);
  border-left: 3px solid #C0392B;
}

/* Markdown básico no conteúdo da IA */
.mensagem-ia-wrapper .mensagem-bolha strong { font-weight: 600; }
.mensagem-ia-wrapper .mensagem-bolha em     { font-style: italic; }
.mensagem-ia-wrapper .mensagem-bolha code {
  background: var(--bege-medio);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 13px;
}

/* Ações das mensagens */
.mensagem-acoes {
  display: flex;
  gap: 6px;
  margin-top: 6px;
  opacity: 0;
  transition: opacity var(--transicao);
}

.mensagem-wrapper:hover .mensagem-acoes { opacity: 1; }

.btn-feedback {
  background: transparent;
  border: 1px solid var(--borda);
  color: var(--texto-muted);
  padding: 3px 8px;
  border-radius: 20px;
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transicao);
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-feedback:hover { background: var(--bege-medio); border-color: var(--marrom-claro); color: var(--texto-secundario); }
.btn-feedback svg   { width: 13px; height: 13px; }

/* Indicador de carregamento (typing) */
.carregando-wrapper {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  max-width: var(--max-chat-width);
  margin: 8px auto;
  padding: 4px 24px;
  width: 100%;
}

.carregando-dots {
  display: flex;
  gap: 5px;
  padding: 4px 0;
  align-items: center;
}

.carregando-dots span {
  width: 7px;
  height: 7px;
  background: var(--borda-input);
  border-radius: 50%;
  animation: bounce-dots 1.3s ease-in-out infinite;
}

.carregando-dots span:nth-child(2) { animation-delay: 0.18s; }
.carregando-dots span:nth-child(3) { animation-delay: 0.36s; }

@keyframes bounce-dots {
  0%, 80%, 100% { transform: scale(0.75); opacity: 0.5; }
  40%            { transform: scale(1); opacity: 1; }
}

/* ─── WELCOME SCREEN ─────────────────────────────────────────────────────── */
#welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px 24px;
}

.prompts-container {
  max-width: var(--max-chat-width);
  margin: 0 auto;
}

.welcome-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.welcome-hero-icon {
  width: 52px;
  height: 52px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 12px rgba(107,58,15,0.15));
}

.welcome-titulo {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--texto-primario);
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--bege-medio) 25%, var(--bege-claro) 50%, var(--bege-medio) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-color: transparent !important;
  cursor: default;
}

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

/* ─── INPUT AREA ─────────────────────────────────────────────────────────── */
#input-area {
  flex-shrink: 0;
  padding: 12px 24px 8px;
  background: var(--bg-chat);
}

.input-container { max-width: var(--max-chat-width); margin: 0 auto; }

.input-box {
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--bg-input);
  border: 1.5px solid var(--borda-input);
  border-radius: var(--raio-grande);
  padding: 14px 16px 10px;
  transition: border-color var(--transicao), box-shadow var(--transicao);
  box-shadow: var(--sombra-sm);
}

.input-box:focus-within {
  border-color: var(--marrom-principal);
  box-shadow: 0 0 0 3px rgba(107,58,15,0.1), var(--sombra-sm);
}

#campo-mensagem {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 15px;
  color: var(--texto-primario);
  resize: none;
  max-height: 200px;
  min-height: 26px;
  line-height: 1.6;
  overflow-y: auto;
  scrollbar-width: none;
}

#campo-mensagem::-webkit-scrollbar { display: none; }
#campo-mensagem::placeholder { color: var(--texto-muted); font-size: 14.5px; }

/* Rodapé do input: botões de ação na linha de baixo */
.input-rodape {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-top: 6px;
}

.input-rodape-dir {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-microfone {
  background: transparent;
  border: none;
  color: var(--texto-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transicao);
}

.btn-microfone:hover { background: var(--bege-medio); color: var(--texto-secundario); }

.btn-microfone.gravando {
  color: white;
  background: #E74C3C;
  animation: pulse-mic 1.5s infinite;
}

@keyframes pulse-mic {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.7); }
  70% { transform: scale(0.95); box-shadow: 0 0 0 10px rgba(231, 76, 60, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(231, 76, 60, 0); }
}

.btn-microfone.ativo  { color: #e74c3c; }
.btn-microfone svg    { width: 18px; height: 18px; }

.btn-enviar {
  background: var(--marrom-principal);
  border: none;
  color: #fff;
  cursor: pointer;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transicao);
  flex-shrink: 0;
}

.btn-enviar:hover:not(:disabled) { background: var(--marrom-medio); transform: scale(1.05); }
.btn-enviar:disabled { background: var(--bege-escuro); cursor: not-allowed; }
.btn-enviar svg      { width: 16px; height: 16px; }

.input-info {
  margin-top: 8px;
  font-size: 11px;
  color: var(--texto-muted);
  text-align: center;
}

/* ─── ÁREA DE PROMPTS — CATEGORIAS ──────────────────────────────────────── */
#prompts-area {
  flex-shrink: 0;
  padding: 4px 24px 16px;
  background: var(--bg-chat);
}

.categorias-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 6px 0 4px;
}

.categoria-btn {
  background: var(--bg-card);
  border: 1px solid var(--borda);
  border-radius: var(--raio-pill);
  padding: 7px 16px;
  font-size: 13px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transicao);
  color: var(--texto-secundario);
  white-space: nowrap;
  box-shadow: var(--sombra-sm);
}

.categoria-btn:hover {
  background: var(--bege-claro);
  border-color: var(--marrom-claro);
  color: var(--texto-primario);
}

.categoria-btn.ativa {
  background: var(--bege-claro);
  border-color: var(--marrom-principal);
  color: var(--marrom-principal);
  font-weight: 600;
}

/* Painel de prompts da categoria */
.categoria-panel {
  background: var(--bg-card);
  border: 1px solid var(--borda);
  border-radius: var(--raio-grande);
  box-shadow: var(--sombra-md);
  overflow: hidden;
  margin-bottom: 10px;
}

.categoria-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px 10px 16px;
  border-bottom: 1px solid var(--bege-medio);
}

.categoria-panel-titulo {
  font-size: 12px;
  font-weight: 700;
  color: var(--texto-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.categoria-panel-fechar {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--texto-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  transition: all var(--transicao);
  padding: 0;
}

.categoria-panel-fechar:hover {
  background: var(--bege-medio);
  color: var(--texto-primario);
}

.categoria-panel-prompts {
  display: flex;
  flex-direction: column;
}

.prompt-item {
  padding: 11px 16px;
  cursor: pointer;
  font-size: 13.5px;
  color: var(--texto-secundario);
  border: none;
  border-bottom: 1px solid var(--bege-claro);
  background: none;
  text-align: left;
  font-family: inherit;
  transition: background var(--transicao), color var(--transicao);
  width: 100%;
  line-height: 1.4;
}

.prompt-item:last-child { border-bottom: none; }

.prompt-item:hover {
  background: var(--bege-claro);
  color: var(--texto-primario);
}

/* ═══════════════════════════════════════════════════════════════════════════
   BOTÕES GLOBAIS
   ═══════════════════════════════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 20px;
  border-radius: var(--raio);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all var(--transicao);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primario {
  background: var(--marrom-principal);
  color: #fff;
  width: 100%;
}

.btn-primario:hover { background: var(--marrom-medio); }

.btn-ghost {
  background: transparent;
  color: var(--texto-secundario);
  border: 1px solid var(--borda);
}

.btn-ghost:hover { background: var(--bege-medio); color: var(--texto-primario); }

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px;
  background: #fff;
  color: #3c4043;
  border: 1.5px solid #dadce0;
  border-radius: var(--raio);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transicao);
  text-decoration: none;
  box-shadow: 0 1px 3px rgba(60,64,67,0.08);
}

.btn-google:hover { background: #f8f9fa; box-shadow: 0 2px 6px rgba(60,64,67,0.15); border-color: #c6c9cc; }

.btn-link {
  background: none;
  border: none;
  color: var(--marrom-principal);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transicao);
  display: inline;
}

.btn-link:hover { color: var(--marrom-medio); }

/* ═══════════════════════════════════════════════════════════════════════════
   MODAL DE AUTH
   ═══════════════════════════════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(28,14,5,0.45);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(4px);
  animation: fadeIn 0.15s ease;
}

.modal-overlay.oculto { display: none; }

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

.modal {
  background: var(--bg-card);
  border: 1px solid var(--borda);
  border-radius: 20px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--sombra-lg);
  animation: slideUp 0.2s ease;
  max-height: 90vh;
  overflow-y: auto;
}

@keyframes slideUp {
  from { transform: translateY(12px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

.modal-fechar {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--bege-medio);
  border: none;
  color: var(--texto-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  transition: all var(--transicao);
}

.modal-fechar:hover { background: var(--bege-escuro); color: var(--texto-primario); }

.modal-header {
  padding: 28px 28px 0;
  text-align: center;
}

.modal-titulo {
  font-size: 20px;
  font-weight: 700;
  color: var(--texto-primario);
  margin-bottom: 6px;
}

.modal-subtitulo {
  font-size: 13px;
  color: var(--texto-muted);
  line-height: 1.5;
}

.modal-body { padding: 20px 28px; }

.modal-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

/* Auth tabs */
.auth-tabs {
  display: flex;
  background: var(--bege-claro);
  border-radius: var(--raio);
  padding: 4px;
  margin-bottom: 20px;
  gap: 2px;
}

.auth-tab {
  flex: 1;
  padding: 8px 10px;
  border: none;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  background: transparent;
  color: var(--texto-muted);
  transition: all var(--transicao);
}

.auth-tab.ativa {
  background: #fff;
  color: var(--texto-primario);
  box-shadow: var(--sombra-sm);
}

/* Forms */
.form-grupo { margin-bottom: 14px; }

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

.form-input {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-app);
  border: 1.5px solid var(--borda);
  border-radius: var(--raio);
  font-size: 14px;
  font-family: inherit;
  color: var(--texto-primario);
  outline: none;
  transition: border-color var(--transicao), box-shadow var(--transicao);
}

.form-input:focus {
  border-color: var(--marrom-principal);
  box-shadow: 0 0 0 3px rgba(107,58,15,0.1);
}

.form-erro {
  color: #C0392B;
  font-size: 13px;
  margin-top: 8px;
  line-height: 1.4;
}

.divisor {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--texto-muted);
  margin: 16px 0;
}

.divisor::before,
.divisor::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--borda);
}

/* ═══════════════════════════════════════════════════════════════════════════
   TOAST NOTIFICATIONS
   ═══════════════════════════════════════════════════════════════════════════ */
#toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.toast {
  background: var(--texto-primario);
  color: var(--bege-claro);
  padding: 10px 18px;
  border-radius: var(--raio-pill);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--sombra-md);
  animation: toastIn 0.2s ease;
  white-space: nowrap;
}

.toast.sucesso { background: #27ae60; color: #fff; }
.toast.erro    { background: #C0392B; color: #fff; }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   UTILITÁRIOS
   ═══════════════════════════════════════════════════════════════════════════ */
.oculto        { display: none !important; }
.text-center   { text-align: center; }
.text-muted    { color: var(--texto-muted); }
.mt-8          { margin-top: 8px; }

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVO
   ═══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  #sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    height: 100dvh; /* mobile: exclui barra do browser */
    transform: translateX(calc(-1 * var(--sidebar-width)));
    box-shadow: var(--sombra-lg);
  }
  
  .btn-toggle-sidebar {
    display: flex !important;
  }

  #sidebar.aberta {
    transform: translateX(0);
  }

  #sidebar.fechada {
    transform: translateX(calc(-1 * var(--sidebar-width)));
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
  }

  #input-area   { padding: 8px 12px 4px; }
  #prompts-area { padding: 4px 12px 12px; }
  .input-box    { padding: 12px 14px 8px; }
  #campo-mensagem { font-size: 16px; } /* evita zoom no iOS */

  .mensagem-wrapper { padding: 4px 14px; }
  .mensagem-usuario-wrapper .mensagem-bolha { max-width: 84%; }

  .categorias-row { gap: 6px; }

  #welcome-screen { padding: 24px 16px 16px; }
  .welcome-hero { gap: 10px; }
  .welcome-hero-icon { width: 38px; height: 38px; }
  .welcome-titulo { font-size: 20px; }

  .modal { border-radius: 16px; margin: 0 4px; }
  .modal-header { padding: 24px 20px 0; }
  .modal-body   { padding: 16px 20px; }
}

@media (max-width: 480px) {
  .topbar-acoes .btn-ghost { display: none; }
  .welcome-titulo { font-size: 18px; }
  .categoria-btn { font-size: 12px; padding: 6px 13px; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   COOKIE BANNER (LGPD)
   ═══════════════════════════════════════════════════════════════════════════ */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3000;
  background: var(--texto-primario);
  color: var(--bege-claro);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
  animation: slideUp 0.3s ease;
}

.cookie-banner.saindo {
  animation: slideDown 0.3s ease forwards;
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

@keyframes slideDown {
  from { transform: translateY(0); }
  to   { transform: translateY(100%); }
}

.cookie-banner-texto {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  line-height: 1.55;
  color: rgba(242,230,217,0.9);
  flex: 1;
}

.cookie-banner-acoes {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.cookie-banner .btn-ghost {
  color: rgba(242,230,217,0.85);
  border-color: rgba(242,230,217,0.25);
}

.cookie-banner .btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  color: var(--bege-claro);
  border-color: rgba(242,230,217,0.5);
}

@media (max-width: 600px) {
  .cookie-banner {
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
  }
  .cookie-banner-acoes {
    justify-content: flex-end;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   BANNER DE SUGESTÃO (welcome screen, abaixo dos prompts)
   ───────────────────────────────────────────────────────────────────────────── */
.banner-sugestao {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 0 4px;
  font-size: 12px;
  color: var(--texto-muted);
  justify-content: center;
  flex-wrap: wrap;
}

.banner-sugestao-btn {
  background: none;
  border: 1px solid var(--borda);
  border-radius: 20px;
  padding: 3px 12px;
  font-size: 12px;
  font-family: inherit;
  color: var(--marrom-principal);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.banner-sugestao-btn:hover {
  background: var(--bege-medio);
  border-color: var(--marrom-claro);
}