/* ============================================================
   UAI. — Chat Flutuante (Chatbot Widget)
   ============================================================ */

.chat-widget {
  position: fixed;
  bottom: 20px;
  right: 20px;
  font-family: var(--font-body);
  z-index: 9999;
  user-select: none;
}

/* Botão flutuante */
.chat-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--on-black);
  color: var(--black);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  font-size: 28px;
  position: relative;
}

.chat-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}

.chat-btn:active {
  transform: scale(0.95);
}

.chat-btn.open {
  background: var(--paper);
}

/* Container do chat */
.chat-container {
  position: absolute;
  bottom: 80px;
  right: 0;
  width: 380px;
  height: 550px;
  background: var(--black-2);
  border: 1px solid var(--line-on-black-strong);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  pointer-events: none;
}

.chat-container.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

/* Header do chat */
.chat-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line-on-black-strong);
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--on-black), var(--paper));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 18px;
  color: var(--black);
  flex-shrink: 0;
}

.chat-header-info {
  flex: 1;
}

.chat-title {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--on-black);
  letter-spacing: 0.05em;
  margin: 0;
}

.chat-status {
  font-size: 12px;
  color: var(--grey-on-black);
  margin: 2px 0 0 0;
}

.chat-close {
  background: none;
  border: none;
  color: var(--grey-on-black);
  cursor: pointer;
  font-size: 20px;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
}

.chat-close:hover {
  color: var(--on-black);
}

/* Mensagens */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-message {
  display: flex;
  gap: 8px;
  animation: messageSlide 0.3s ease;
}

@keyframes messageSlide {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chat-message.bot {
  justify-content: flex-start;
}

.chat-message.user {
  justify-content: flex-end;
}

.message-bubble {
  max-width: 75%;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.4;
  word-wrap: break-word;
}

.chat-message.bot .message-bubble {
  background: var(--line-on-black-strong);
  color: var(--on-black);
  border-radius: 12px 12px 12px 4px;
}

.chat-message.user .message-bubble {
  background: var(--on-black);
  color: var(--black);
  border-radius: 12px 12px 4px 12px;
}

/* Indicador de "digitando..." */
.chat-typing {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 14px 16px;
}

.chat-typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grey-on-black);
  animation: chatTypingBounce 1.2s infinite ease-in-out;
}

.chat-typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes chatTypingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* Respostas rápidas */
.chat-quick-replies {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 2px 0 4px;
  animation: messageSlide 0.3s ease;
}

.chat-quick-reply {
  background: transparent;
  border: 1px solid var(--line-on-black-strong);
  color: var(--on-black);
  border-radius: 999px;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.chat-quick-reply:hover {
  background: var(--on-black);
  color: var(--black);
  border-color: var(--on-black);
}

/* Input */
.chat-input-area {
  padding: 16px 20px;
  border-top: 1px solid var(--line-on-black-strong);
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-input {
  flex: 1;
  background: var(--black);
  border: 1px solid var(--line-on-black-strong);
  border-radius: 6px;
  color: var(--on-black);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 10px 12px;
  resize: none;
  max-height: 80px;
  outline: none;
  transition: border-color 0.2s ease;
}

.chat-input:focus {
  border-color: var(--on-black);
}

.chat-input::placeholder {
  color: var(--grey-on-black);
  opacity: 0.6;
}

.chat-send {
  background: var(--on-black);
  color: var(--black);
  border: none;
  border-radius: 6px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.chat-send:hover {
  background: var(--paper);
  transform: scale(1.05);
}

.chat-send:active {
  transform: scale(0.95);
}

/* Scrollbar customizado */
.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--line-on-black-strong);
  border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--grey-on-black);
}

/* Responsivo */
@media (max-width: 480px) {
  .chat-container {
    position: fixed;
    width: calc(100vw - 40px);
    height: calc(100vh - 100px);
    bottom: 70px;
    right: 20px;
    left: 20px;
  }

  .message-bubble {
    max-width: 85%;
  }
}