/* ============================================================
   MORPHEUS IA — Chat Widget
   Reuses design tokens (colors, fonts, glow, transitions) already
   defined in css/style.css via [data-theme="light"|"dark"]. No new
   palette is introduced here.
   ============================================================ */

.chat-widget {
  position: fixed;
  right: clamp(1rem, 4vw, 1.5rem);
  bottom: clamp(1rem, 4vw, 1.5rem);
  z-index: 200;
}

/* ---------- FAB ---------- */
.chat-widget__fab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border: none;
  border-radius: 50%;
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  cursor: pointer;
  box-shadow: var(--glow-cyan);
  transition: box-shadow var(--transition-glow), transform var(--transition-fast);
}
.chat-widget__fab:hover,
.chat-widget__fab:focus-visible {
  box-shadow: var(--glow-cyan-strong);
  transform: translateY(-2px);
}
.chat-widget__fab-icon {
  width: 24px;
  height: 24px;
}
.chat-widget__fab-icon.icon-close { display: none; }
.chat-widget__fab[aria-expanded="true"] .icon-chat { display: none; }
.chat-widget__fab[aria-expanded="true"] .icon-close { display: block; }

/* ---------- Panel ---------- */
.chat-widget__panel {
  display: none;
  position: absolute;
  right: 0;
  bottom: calc(56px + 1rem);
  /* 420px x até 720px: mais área para a conversa. A altura desconta o FAB
     (bottom ~6rem) e o cabeçalho fixo do site (~4.5rem), para o painel não
     cobrir a navegação em telas baixas. */
  width: 420px;
  max-width: calc(100vw - 2rem);
  height: min(720px, calc(100vh - 10.5rem));
  height: min(720px, calc(100dvh - 10.5rem));
  min-height: 360px;
  flex-direction: column;
  /* O painel é um <section> e herdava o `padding: 6.4rem 0` das seções da
     página, comendo ~205px de altura útil (metade acima do cabeçalho, metade
     abaixo do campo de texto). */
  padding: 0;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  box-shadow: var(--glow-cyan-strong);
  overflow: hidden;
}
.chat-widget__panel:not([hidden]) {
  display: flex;
}

.chat-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.chat-widget__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
}
.chat-widget__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
}
.chat-widget__close:hover,
.chat-widget__close:focus-visible {
  color: var(--color-accent-primary);
  background: var(--color-accent-soft);
}

/* ---------- Messages ---------- */
.chat-widget__messages {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  padding: 1rem;
  scroll-behavior: smooth;
  overscroll-behavior: contain;
}
/* Barra de rolagem discreta em vez da nativa larga do Chrome. */
.chat-widget__messages::-webkit-scrollbar { width: 8px; }
.chat-widget__messages::-webkit-scrollbar-thumb {
  background: var(--color-card-border);
  border-radius: 4px;
}

.chat-widget__message {
  max-width: 88%;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  /* 0.9375rem com entrelinha 1.6: respostas do assistente costumam ter vários
     parágrafos e 0.875/1.5 ficava apertado demais para ler confortavelmente. */
  font-size: 0.9375rem;
  line-height: 1.6;
  word-break: break-word;
  overflow-wrap: anywhere;
}
.chat-widget__message--bot {
  align-self: flex-start;
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-card-border);
  border-bottom-left-radius: 4px;
}
.chat-widget__message--user {
  align-self: flex-end;
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  border-bottom-right-radius: 4px;
  white-space: pre-wrap; /* preserva as quebras que o visitante digitou */
}

/* ---------- Markdown dentro da bolha do assistente ---------- */
.chat-widget__paragraph {
  margin: 0;
}
.chat-widget__paragraph + .chat-widget__paragraph,
.chat-widget__paragraph + .chat-widget__list,
.chat-widget__list + .chat-widget__paragraph,
.chat-widget__list + .chat-widget__list {
  margin-top: 0.6em;
}
.chat-widget__message strong {
  font-weight: 700;
  color: inherit;
}
.chat-widget__message em {
  font-style: italic;
}
.chat-widget__message code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.875em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--color-accent-soft);
}
.chat-widget__list {
  margin: 0;
  padding-left: 1.25rem;
}
.chat-widget__list li + li {
  margin-top: 0.3em;
}

/* ---------- "Digitando…" ---------- */
/* Repete a aparência da bolha do assistente sem usar a classe `--bot`: não é
   uma mensagem, e não deve ser tratado como uma por seletores ou leitores de
   tela. */
.chat-widget__typing {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0.9rem 1rem;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-card-border);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
}
.chat-widget__typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-text-secondary);
  opacity: 0.4;
  animation: chat-typing 1.2s infinite ease-in-out;
}
.chat-widget__typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-widget__typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes chat-typing {
  0%, 60%, 100% { opacity: 0.25; transform: translateY(0); }
  30%           { opacity: 1;    transform: translateY(-3px); }
}
@media (prefers-reduced-motion: reduce) {
  .chat-widget__typing span { animation: none; opacity: 0.5; }
  .chat-widget__messages { scroll-behavior: auto; }
}
.chat-widget__consent {
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
  background: var(--color-bg-tertiary);
  border-left: 3px solid var(--color-accent-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
}

/* ---------- Status messages (rate limit / offline / validation) ---------- */
.chat-widget__status {
  margin: 0 1rem 0.75rem;
  padding: 0.625rem 0.875rem;
  border-left: 3px solid var(--color-accent-primary);
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  font-size: var(--text-small);
  border-radius: 8px;
  flex-shrink: 0;
}

/* ---------- WhatsApp handoff ---------- */
.chat-widget__whatsapp {
  display: none;
  align-items: center;
  justify-content: center;
  margin: 0 1rem 0.75rem;
  padding: 0.625rem 1rem;
  border-radius: 50px;
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  font-weight: 600;
  font-size: var(--text-small);
  text-decoration: none;
  text-align: center;
  box-shadow: var(--glow-cyan);
  transition: box-shadow var(--transition-glow), transform var(--transition-fast);
  flex-shrink: 0;
}
.chat-widget__whatsapp:not([hidden]) {
  display: inline-flex;
}
.chat-widget__whatsapp:hover,
.chat-widget__whatsapp:focus-visible {
  box-shadow: var(--glow-cyan-strong);
  transform: translateY(-1px);
}

/* ---------- Input form ---------- */
.chat-widget__form {
  padding: 0.75rem 1rem 0.5rem;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}
/* Campo e botão dentro de uma única "caixa": o botão vira um ícone e devolve
   ao texto a largura que o rótulo "Enviar" ocupava. */
.chat-widget__composer {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding: 0.375rem 0.375rem 0.375rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-bg-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.chat-widget__composer:focus-within {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}
.chat-widget__input {
  flex: 1;
  min-width: 0;
  /* Cresce com o texto (ajustado no JS) até ~6 linhas; daí rola. */
  max-height: 9.5rem;
  padding: 0.5rem 0;
  border: none;
  background: transparent;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.5;
  resize: none;
  overflow-y: auto;
}
.chat-widget__input:focus,
.chat-widget__input:focus-visible {
  outline: none;
}
.chat-widget__send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border: none;
  border-radius: 10px;
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  cursor: pointer;
  transition: box-shadow var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
}
.chat-widget__send svg {
  width: 18px;
  height: 18px;
}
.chat-widget__send:hover:not(:disabled),
.chat-widget__send:focus-visible:not(:disabled) {
  box-shadow: var(--glow-cyan);
  transform: translateY(-1px);
}
.chat-widget__send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.chat-widget__meta {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  min-height: 1rem;
  margin-top: 0.375rem;
  padding: 0 0.25rem;
  font-size: 0.6875rem;
  line-height: 1.4;
  color: var(--color-text-secondary);
}
.chat-widget__counter {
  margin-left: auto;
  font-variant-numeric: tabular-nums;
}
.chat-widget__counter--over {
  color: #e5484d;
  font-weight: 600;
}

.chat-widget__sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   RESPONSIVO
   ============================================================ */
/* Atalho de teclado não faz sentido em tela de toque. */
@media (hover: none) {
  .chat-widget__hint { visibility: hidden; }
}

@media (max-width: 480px) {
  .chat-widget {
    right: 0.75rem;
    bottom: 0.75rem;
  }
  /* No celular o painel ocupa a tela inteira: um cartão flutuante sobrava
     pouco espaço para a conversa assim que o teclado abria. O FAB some
     enquanto o chat está aberto — fechar fica com o botão do cabeçalho. */
  .chat-widget__panel {
    position: fixed;
    inset: 0;
    width: 100%;
    max-width: none;
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    border: none;
    border-radius: 0;
    box-shadow: none;
  }
  .chat-widget__fab[aria-expanded="true"] {
    display: none;
  }
  .chat-widget__message {
    max-width: 92%;
  }
  .chat-widget__form {
    padding-bottom: max(0.5rem, env(safe-area-inset-bottom));
  }
}

/* iOS dá zoom no campo se a fonte for menor que 16px. */
@media (max-width: 768px) {
  .chat-widget__input { font-size: 1rem; }
}