:root {
  --whatsapp-green: #25D366;
  --whatsapp-dark-green: #128C7E;
  --whatsapp-light-bg: #ECE5DD;
  --whatsapp-white: #FFFFFF;
  --whatsapp-dark-text: #111B21;
  --whatsapp-muted-text: #667781;
  --whatsapp-bubble-user: #E7FFDB;
  --whatsapp-bubble-bot: #FFFFFF;
  --whatsapp-shadow: rgba(0, 0, 0, 0.15);
  --whatsapp-border: rgba(0, 0, 0, 0.1);
  --whatsapp-blur: blur(8px);
}

/* Floating Chat Button */
.whatsapp-floating-btn {
  position: fixed;
  bottom: 3rem;
  right: 1.5rem;
  width: 56px;
  height: 56px;
  background: var(--whatsapp-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 10px var(--whatsapp-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  z-index: 1000;
}

.whatsapp-floating-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 15px var(--whatsapp-shadow);
}

.whatsapp-floating-btn:focus {
  outline: 2px solid var(--whatsapp-dark-green);
  outline-offset: 2px;
}

.floating-btn-icon {
  font-size: 1.8rem;
  color: var(--whatsapp-white);
}

@media (max-width: 480px) {
  .whatsapp-floating-btn {
    width: 48px;
    height: 48px;
    bottom: 2rem;
    right: 1rem;
  }
  .floating-btn-icon {
    font-size: 1.5rem;
  }
  .chat-overlay-header {
    padding: 0.4rem 0.8rem;
    min-height: 45px;
  }
  .chat-header-title {
    font-size: 1.2rem;
  }
  .chat-header-actions .btn {
    width: 28px;
    height: 28px;
    font-size: 0.9rem;
  }
}

/* Chat Overlay */
.whatsapp-chat-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--whatsapp-light-bg);
  z-index: 2000;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.whatsapp-chat-overlay.active {
  display: flex;
  opacity: 1;
}

/* Hide footer when chat is active */
.whatsapp-chat-overlay.active ~ #mainFooter,
body:has(.whatsapp-chat-overlay.active) #mainFooter {
  display: none;
}

.chat-overlay-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .whatsapp-chat-overlay {
    background: var(--whatsapp-light-bg);
  }
  .chat-overlay-container {
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 0 0 20px var(--whatsapp-shadow);
  }
}

/* Chat Header */
.chat-overlay-header {
  padding: 0.5rem 1rem;
  background: var(--whatsapp-dark-green);
  border-bottom: 1px solid var(--whatsapp-border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 50px;
}

.chat-header-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--whatsapp-white);
  font-family: 'Comic Sans MS', cursive, sans-serif;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  letter-spacing: 0.5px;
}

.chat-header-actions {
  display: flex;
  gap: 0.5rem;
}

.chat-header-actions .btn {
  background: transparent;
  border: none;
  color: var(--whatsapp-white);
  font-size: 1rem;
  padding: 0.4rem;
  transition: all 0.2s ease;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-header-actions .btn:hover,
.chat-header-actions .btn:focus {
  color: var(--whatsapp-white);
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.1);
}

@media (min-width: 768px) {
  .chat-overlay-header {
    padding: 0.6rem 1.5rem;
    min-height: 55px;
  }
  .chat-header-title {
    font-size: 1.5rem;
  }
  .chat-header-actions .btn {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
  }
}

/* Chat Body */
.chat-overlay-body {
  flex: 1;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--whatsapp-light-bg);
}

.chat-overlay-body .chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
  min-height: 0;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--whatsapp-muted-text) var(--whatsapp-border);
}

.chat-overlay-body .chat-messages::-webkit-scrollbar {
  width: 5px;
}

.chat-overlay-body .chat-messages::-webkit-scrollbar-track {
  background: var(--whatsapp-border);
  border-radius: 3px;
}

.chat-overlay-body .chat-messages::-webkit-scrollbar-thumb {
  background: var(--whatsapp-muted-text);
  border-radius: 3px;
}

.chat-overlay-body .chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--whatsapp-dark-green);
}

@media (min-width: 768px) {
  .chat-overlay-body {
    padding: 1rem;
  }
  .chat-overlay-body .chat-messages {
    padding: 0.75rem;
  }
}

/* Chat Footer */
.chat-overlay-footer {
  padding: 1rem 0.75rem;
  background: var(--whatsapp-light-bg);
  border-top: 1px solid var(--whatsapp-border);
  flex-shrink: 0;
}

/* Quick Action Buttons */
.chat-overlay-footer .quick-actions {
  text-align: center;
}

.chat-overlay-footer .quick-actions .text-muted {
  font-size: 0.8rem;
  color: var(--whatsapp-muted-text);
}

.chat-overlay-footer .quick-action-btn {
  background: var(--whatsapp-white);
  border: 1px solid var(--whatsapp-border);
  color: var(--whatsapp-dark-text);
  font-size: 0.8rem;
  padding: 0.5rem 0.6rem;
  border-radius: 15px;
  transition: all 0.2s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-overlay-footer .quick-action-btn:hover {
  background: var(--whatsapp-green);
  color: var(--whatsapp-white);
  border-color: var(--whatsapp-green);
  transform: translateY(-1px);
}

.chat-overlay-footer .quick-action-btn:active {
  transform: translateY(0);
}

@media (min-width: 768px) {
  .chat-overlay-footer {
    padding: 1.25rem 1rem;
  }
  .chat-overlay-footer .quick-action-btn {
    font-size: 0.85rem;
    padding: 0.6rem 0.8rem;
  }
}

@media (max-width: 480px) {
  .chat-overlay-footer .quick-action-btn {
    font-size: 0.75rem;
    padding: 0.35rem 0.4rem;
  }
}

/* Message Styles */
.chat-overlay-body .message {
  display: flex;
  align-items: flex-start;
  margin-bottom: 0.5rem;
  padding: 0.25rem;
  animation: fadeInUp 0.3s ease;
}

.chat-overlay-body .message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.chat-overlay-body .bot-message .message-avatar {
  background: var(--whatsapp-dark-green);
  color: var(--whatsapp-white);
}

.chat-overlay-body .user-message {
  flex-direction: row-reverse;
}

.chat-overlay-body .user-message .message-avatar {
  background: var(--whatsapp-green);
  color: var(--whatsapp-white);
  margin-right: 0;
  margin-left: 0.5rem;
}

.chat-overlay-body .message-content {
  max-width: 80%;
  display: flex;
  flex-direction: column;
}

.chat-overlay-body .user-message .message-content {
  align-items: flex-end;
}

.chat-overlay-body .message-bubble {
  background: var(--whatsapp-bubble-bot);
  color: var(--whatsapp-dark-text);
  padding: 0.5rem 0.75rem;
  border-radius: 10px;
  border-bottom-left-radius: 2px;
  word-wrap: break-word;
  line-height: 1.4;
  box-shadow: 0 1px 3px var(--whatsapp-shadow);
  font-size: 0.9rem;
  width: fit-content;
}

.chat-overlay-body .user-message .message-bubble {
  background: var(--whatsapp-bubble-user);
  border-bottom-right-radius: 2px;
  border-bottom-left-radius: 10px;
}

.chat-overlay-body .message-bubble p {
  margin: 0 0 0.3rem 0;
}

.chat-overlay-body .message-bubble p:last-child {
  margin-bottom: 0;
}

.chat-overlay-body .message-bubble ul {
  margin: 0.5rem 0 0 0;
  padding-left: 1.2rem;
}

.chat-overlay-body .message-bubble ul li {
  margin-bottom: 0.3rem;
  color: var(--whatsapp-dark-text);
  font-size: 0.9rem;
  line-height: 1.4;
}

.chat-overlay-body .message-time {
  font-size: 0.7rem;
  color: var(--whatsapp-muted-text);
  margin-top: 0.2rem;
}

.chat-overlay-body .user-message .message-time {
  text-align: right;
}

.chat-overlay-body .read-receipt {
  font-size: 0.6rem;
  color: #34B7F1;
  margin-left: 0.3rem;
}

/* Typing Indicator */
.chat-overlay-body .typing-indicator {
  display: flex;
  align-items: center;
  margin-bottom: 0.5rem;
}

.chat-overlay-body .typing-indicator .message-avatar {
  background: var(--whatsapp-dark-green);
  color: var(--whatsapp-white);
}

.chat-overlay-body .typing-dots {
  background: var(--whatsapp-bubble-bot);
  padding: 0.5rem 0.75rem;
  border-radius: 10px;
  border-bottom-left-radius: 2px;
  display: flex;
  align-items: center;
  gap: 3px;
  box-shadow: 0 1px 3px var(--whatsapp-shadow);
}

.chat-overlay-body .typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--whatsapp-muted-text);
  animation: typingBounce 1.2s ease-in-out infinite both;
}

.chat-overlay-body .typing-dot:nth-child(1) { animation-delay: -0.24s; }
.chat-overlay-body .typing-dot:nth-child(2) { animation-delay: -0.12s; }
.chat-overlay-body .typing-dot:nth-child(3) { animation-delay: 0s; }

/* Stock Recommendations - DOS Style */
.chat-overlay-body .stock-recommendations-chat {
  background: transparent;
  padding: 0.5rem 0;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--whatsapp-dark-text);
}

.chat-overlay-body .stock-recommendations-chat .stock-card {
  background: transparent;
  padding: 0.2rem 0;
  margin-bottom: 0.2rem;
  cursor: pointer;
}

.chat-overlay-body .stock-recommendations-chat .stock-card:hover {
  background: rgba(0, 0, 0, 0.05);
}

.chat-overlay-body .stock-recommendations-chat .stock-card.expanded {
  background: rgba(0, 0, 0, 0.08);
}

.chat-overlay-body .stock-recommendations-chat .stock-card-header {
  display: block;
}

.chat-overlay-body .stock-recommendations-chat .stock-card-compact {
  display: block;
}

.chat-overlay-body .stock-recommendations-chat .stock-info-compact {
  display: inline;
  margin-right: 1rem;
}

.chat-overlay-body .stock-recommendations-chat .stock-price-compact {
  display: inline;
  float: right;
}

.chat-overlay-body .stock-recommendations-chat .expand-indicator {
  color: var(--whatsapp-muted-text);
  font-size: 0.8rem;
  margin-left: 0.5rem;
  display: inline;
}

.chat-overlay-body .stock-recommendations-chat .expand-indicator:hover {
  color: var(--whatsapp-dark-text);
}

.chat-overlay-body .stock-recommendations-chat .stock-card-details {
  margin-top: 0.2rem;
  padding-left: 1.5rem;
}

.chat-overlay-body .stock-recommendations-chat .stock-name,
.chat-overlay-body .stock-recommendations-chat .stock-symbol,
.chat-overlay-body .stock-recommendations-chat .stock-price,
.chat-overlay-body .stock-recommendations-chat .stock-change,
.chat-overlay-body .stock-recommendations-chat .stock-reason,
.chat-overlay-body .stock-recommendations-chat .stock-volume,
.chat-overlay-body .stock-recommendations-chat .stock-sector {
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  color: var(--whatsapp-dark-text);
}

.chat-overlay-body .stock-recommendations-chat .stock-symbol {
  color: var(--whatsapp-muted-text);
  margin: 0 0.5rem;
  text-transform: uppercase;
}

.chat-overlay-body .stock-recommendations-chat .stock-change.text-success {
  color: #00FF7F;
}

.chat-overlay-body .stock-recommendations-chat .stock-change.text-danger {
  color: #FF4040;
}

/* Error Messages */
.chat-overlay-body .chat-error {
  background: #FFEFEE;
  border-left: 4px solid #FF4040;
  padding: 0.75rem;
  border-radius: 8px;
  margin-top: 0.5rem;
  color: var(--whatsapp-dark-text);
  font-size: 0.9rem;
  line-height: 1.4;
}

.chat-overlay-body .chat-error .dismiss-btn {
  float: right;
  cursor: pointer;
  color: #FF4040;
  font-size: 0.9rem;
}

/* Desktop Responsive Styles */
@media (min-width: 768px) {
  .chat-overlay-body .message {
    margin-bottom: 0.75rem;
  }
  .chat-overlay-body .message-avatar {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
  .chat-overlay-body .message-bubble {
    font-size: 0.95rem;
    padding: 0.6rem 0.9rem;
  }
  .chat-overlay-body .message-time {
    font-size: 0.75rem;
  }
  .chat-overlay-body .typing-dots {
    padding: 0.6rem 0.9rem;
  }
  .chat-overlay-body .typing-dot {
    width: 7px;
    height: 7px;
  }
  .chat-overlay-body .stock-recommendations-chat {
    font-size: 0.95rem;
  }
  .chat-overlay-body .stock-recommendations-chat .stock-name,
  .chat-overlay-body .stock-recommendations-chat .stock-symbol,
  .chat-overlay-body .stock-recommendations-chat .stock-price,
  .chat-overlay-body .stock-recommendations-chat .stock-change {
    font-size: 0.95rem;
  }
  .chat-overlay-body .stock-recommendations-chat .stock-reason,
  .chat-overlay-body .stock-recommendations-chat .stock-volume,
  .chat-overlay-body .stock-recommendations-chat .stock-sector {
    font-size: 0.9rem;
  }
  .chat-overlay-body .chat-error {
    padding: 1rem;
    font-size: 0.95rem;
  }
}

/* Mobile Responsive Styles */
@media (max-width: 480px) {
  .chat-overlay-body .stock-recommendations-chat {
    font-size: 0.8rem;
  }
  .chat-overlay-body .stock-recommendations-chat .stock-card {
    padding: 0.1rem 0;
  }
  .chat-overlay-body .stock-recommendations-chat .stock-name,
  .chat-overlay-body .stock-recommendations-chat .stock-symbol,
  .chat-overlay-body .stock-recommendations-chat .stock-price,
  .chat-overlay-body .stock-recommendations-chat .stock-change {
    font-size: 0.8rem;
  }
  .chat-overlay-body .stock-recommendations-chat .expand-indicator {
    font-size: 0.75rem;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes typingBounce {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .whatsapp-floating-btn,
  .whatsapp-chat-overlay,
  .chat-overlay-body .message,
  .chat-overlay-body .typing-dot {
    animation: none;
    transition: none;
  }
}