/* ============================================================
   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);
  /* 400px x ~640px: largura e altura de painel flutuante recomendadas para
     conversas longas — a janela anterior (360x520) cortava as respostas do
     modelo e forçava rolagem a cada turno. A altura acompanha a viewport para
     nunca ultrapassar a tela. */
  width: 400px;
  max-width: calc(100vw - 2rem);
  height: min(640px, calc(100vh - 7rem));
  height: min(640px, calc(100dvh - 7rem));
  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: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 1.375rem;
  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 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}
.chat-widget__input {
  flex: 1;
  min-width: 0;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-small);
  transition: border-color var(--transition-fast);
}
.chat-widget__input:focus-visible {
  outline: none;
  border-color: var(--color-accent-primary);
}
.chat-widget__input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.chat-widget__send {
  flex-shrink: 0;
  padding: 0.625rem 1.125rem;
  border: none;
  border-radius: 8px;
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-small);
  cursor: pointer;
  transition: box-shadow var(--transition-fast), opacity var(--transition-fast);
}
.chat-widget__send:hover:not(:disabled),
.chat-widget__send:focus-visible:not(:disabled) {
  box-shadow: var(--glow-cyan);
}
.chat-widget__send:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ============================================================
   RESPONSIVO
   ============================================================ */
@media (max-width: 480px) {
  .chat-widget {
    right: 0.75rem;
    bottom: 0.75rem;
    left: 0.75rem;
  }
  .chat-widget__panel {
    position: fixed;
    left: 0.75rem;
    right: 0.75rem;
    bottom: calc(56px + 1rem);
    width: auto;
    max-width: none;
    /* No celular o espaço útil é a tela toda menos o FAB: limitar a 65vh como
       antes deixava a conversa espremida no meio da tela. */
    height: calc(100vh - 6.5rem);
    height: calc(100dvh - 6.5rem);
    max-height: 640px;
  }
}

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