/* Chat FAB */
.chat-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #FFFFFF;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1100;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.chat-fab:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 28px rgba(27, 110, 243, 0.4);
}

.chat-fab.hidden {
  display: none;
}

/* Chat Drawer */
.chat-drawer {
  position: fixed;
  bottom: 0;
  right: 0;
  width: 380px;
  height: 520px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-lg);
  z-index: 1200;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.chat-drawer.open {
  transform: translateY(0);
}

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

.chat-header-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-header-title i {
  color: var(--color-primary);
}

.chat-close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease;
}

.chat-close-btn:hover {
  color: var(--text-primary);
}

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

.chat-message {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.5;
  word-wrap: break-word;
}

.chat-message.user {
  align-self: flex-end;
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-bottom-right-radius: 4px;
}

.chat-message.assistant {
  align-self: flex-start;
  background-color: var(--bg-surface-raised);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 4px;
}

.chat-message.welcome {
  align-self: flex-start;
  background-color: var(--bg-surface-raised);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.chat-message.welcome strong {
  color: var(--text-primary);
}

/* Typing cursor for progressive text display */
.chat-message.typing-active::after {
  content: '|';
  font-weight: 700;
  color: var(--color-primary);
  animation: blink-cursor 0.6s step-end infinite;
}

@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Typing Indicator */
.chat-typing {
  align-self: flex-start;
  padding: 10px 14px;
  background-color: var(--bg-surface-raised);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  gap: 4px;
  align-items: center;
}

.chat-typing .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--text-muted);
  animation: typing-bounce 1.4s infinite ease-in-out;
}

.chat-typing .dot:nth-child(2) { animation-delay: 0.2s; }
.chat-typing .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-6px); }
}

/* Inline Confirm Button */
.chat-confirm-btn {
  display: inline-block;
  margin-top: 8px;
  padding: 6px 16px;
  background-color: var(--color-gain);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.chat-confirm-btn:hover {
  opacity: 0.9;
}

.chat-confirm-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Chat Input Area */
.chat-input-bar {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  gap: 8px;
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  background-color: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s ease;
}

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

.chat-input::placeholder {
  color: var(--text-muted);
}

.chat-send-btn {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-send-btn:hover {
  background-color: var(--color-primary-hover);
}

.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Responsive */
@media (max-width: 480px) {
  .chat-drawer {
    width: 100%;
    height: 70vh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
}