.chat-ia {
  --chat-fundo: var(--fundo, #0b0a08);
  --chat-superficie: var(--superficie, #161210);
  --chat-acento: var(--acento, #ec3f3a);
  --chat-titulo: var(--titulo, #ffffff);
  --chat-texto: var(--texto, #a5a5a5);
  --chat-linha: var(--linha, rgba(255, 255, 255, 0.14));
  font-family: var(--fonte, Georgia, serif);
}

.chat-ia-oculto {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.chat-ia-botao {
  position: fixed;
  right: 1.2rem;
  bottom: 4.6rem;
  z-index: 30;
  display: grid;
  place-items: center;
  width: 3.4rem;
  height: 3.4rem;
  background: var(--chat-acento);
  color: #fff;
  border: 0;
  border-radius: 50%;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.45);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.chat-ia-botao:hover, .chat-ia-botao:focus-visible { transform: scale(1.06); }

.chat-ia-botao[aria-expanded="true"] { background: var(--chat-superficie); border: 1px solid var(--chat-acento); }

.chat-ia-painel {
  position: fixed;
  right: 1.2rem;
  bottom: 8.6rem;
  z-index: 30;
  display: flex;
  flex-direction: column;
  width: min(23rem, calc(100vw - 2.4rem));
  height: min(32rem, calc(100vh - 10rem));
  background: var(--chat-fundo);
  border: 1px solid var(--chat-linha);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
}

.chat-ia-painel[hidden] { display: none; }

.chat-ia-topo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.7rem 0.9rem;
  background: var(--chat-acento);
}

.chat-ia-topo h2 {
  margin: 0;
  color: #fff;
  font-family: var(--display, sans-serif);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.chat-ia-fechar {
  background: none;
  border: 0;
  color: #fff;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
}

.chat-ia-mensagens {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.9rem;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.chat-ia-msg {
  max-width: 85%;
  padding: 0.55rem 0.75rem;
  font-size: 0.95rem;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.chat-ia-msg a { color: inherit; text-decoration: underline; }

.chat-ia-msg-assistant { align-self: flex-start; background: var(--chat-superficie); color: var(--chat-texto); border: 1px solid var(--chat-linha); }

.chat-ia-msg-user { align-self: flex-end; background: var(--chat-acento); color: #fff; }

.chat-ia-msg-digitando { opacity: 0.7; font-style: italic; }

.chat-ia-form {
  display: flex;
  gap: 0.5rem;
  padding: 0.7rem;
  border-top: 1px solid var(--chat-linha);
}

.chat-ia-form textarea {
  flex: 1;
  min-height: 2.6rem;
  max-height: 7rem;
  padding: 0.55rem 0.7rem;
  background: var(--chat-superficie);
  color: var(--chat-titulo);
  border: 1px solid var(--chat-linha);
  font: inherit;
  font-size: 0.95rem;
  overflow-y: hidden;
  resize: none;
}

.chat-ia-form textarea:focus { outline: 1px solid var(--chat-acento); }

.chat-ia-enviar {
  padding: 0 0.9rem;
  background: var(--chat-acento);
  color: #fff;
  border: 0;
  font-family: var(--display, sans-serif);
  font-size: 0.95rem;
  cursor: pointer;
}

.chat-ia-enviar:disabled, .chat-ia-form textarea:disabled { opacity: 0.55; cursor: wait; }

.chat-ia-nota {
  margin: 0;
  padding: 0 0.9rem 0.7rem;
  color: var(--suave, #787877);
  font-size: 0.78rem;
  line-height: 1.4;
}

.chat-ia-nota a { color: var(--chat-acento); }

@media (max-width: 560px) {
  .chat-ia-painel {
    right: 0.6rem;
    left: 0.6rem;
    bottom: 8.4rem;
    width: auto;
    height: min(30rem, calc(100vh - 9.6rem));
  }
}