/* THE EXPERT HUB — Premium FAQ Chatbot Styling */

:root {
  --chat-bg: rgba(10, 10, 12, 0.85); /* Glassmorphic matching --ink-deep */
  --chat-card: rgba(24, 24, 28, 0.95); /* Elevated background */
  --chat-border: rgba(244, 244, 240, 0.08); /* Matching --ink-line */
  --chat-glow: rgba(212, 255, 61, 0.15); /* Matching --lime-glow */
}

/* Chatbot container */
.tehub-chat-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  font-family: var(--font-body), sans-serif;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

/* Floating Action Button (Trigger) */
.tehub-chat-trigger {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--lime);
  color: var(--ink-000);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px var(--lime-glow), 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  outline: none;
}

.tehub-chat-trigger:hover {
  transform: scale(1.08) translateY(-2px);
  background: var(--lime-soft);
  box-shadow: 0 12px 40px rgba(212, 255, 61, 0.3), 0 6px 16px rgba(0, 0, 0, 0.4);
}

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

/* Notification badge */
.tehub-chat-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 14px;
  height: 14px;
  background: #ff4a4a;
  border: 2px solid var(--ink-deep);
  border-radius: 50%;
  animation: pulse-red 2s infinite;
}

/* Icons */
.tehub-chat-icon-open,
.tehub-chat-icon-close {
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.tehub-chat-widget.open .tehub-chat-icon-open {
  transform: rotate(-90deg) scale(0);
  opacity: 0;
  position: absolute;
}

.tehub-chat-widget:not(.open) .tehub-chat-icon-close {
  transform: rotate(90deg) scale(0);
  opacity: 0;
  position: absolute;
}

/* Chat Window */
.tehub-chat-window {
  width: 380px;
  max-width: calc(100vw - 48px);
  height: 520px;
  max-height: calc(100vh - 120px);
  background: var(--chat-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--chat-border);
  border-radius: 20px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 1px rgba(255, 255, 255, 0.1) inset;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.tehub-chat-widget.open .tehub-chat-window {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

/* Header */
.tehub-chat-header {
  padding: 16px var(--space-4, 20px);
  background: rgba(24, 24, 28, 0.6);
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tehub-chat-bot-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tehub-chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--chat-border);
  border: 1.5px solid var(--lime);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  position: relative;
}

.tehub-chat-status-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 9px;
  height: 9px;
  background: #39d353;
  border: 1.5px solid var(--ink-deep);
  border-radius: 50%;
}

.tehub-chat-bot-info h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0;
  color: var(--paper);
  line-height: 1.2;
}

.tehub-chat-bot-info span {
  font-size: 0.75rem;
  color: var(--paper-soft);
  display: flex;
  align-items: center;
  gap: 4px;
}

.tehub-chat-close {
  background: transparent;
  border: none;
  color: var(--paper-mute);
  cursor: pointer;
  padding: 4px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.tehub-chat-close:hover {
  color: var(--paper);
  background: var(--chat-border);
}

/* Messages Area */
.tehub-chat-messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}

/* Scrollbar styles */
.tehub-chat-messages::-webkit-scrollbar {
  width: 5px;
}
.tehub-chat-messages::-webkit-scrollbar-track {
  background: transparent;
}
.tehub-chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
}
.tehub-chat-messages::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Message Bubble */
.tehub-message {
  max-width: 82%;
  padding: 12px 16px;
  font-size: 0.875rem;
  line-height: 1.45;
  animation: message-pop 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.tehub-message--bot {
  background: var(--chat-card);
  border: 1px solid var(--chat-border);
  color: var(--paper);
  align-self: flex-start;
  border-radius: 0 16px 16px 16px;
}

.tehub-message--user {
  background: var(--lime);
  color: var(--ink-000);
  align-self: flex-end;
  border-radius: 16px 16px 0 16px;
  font-weight: 500;
}

/* Typing Indicator */
.tehub-typing-indicator {
  display: flex;
  gap: 4px;
  padding: 12px 16px;
  background: var(--chat-card);
  border: 1px solid var(--chat-border);
  border-radius: 0 16px 16px 16px;
  align-self: flex-start;
  width: fit-content;
}

.tehub-typing-indicator span {
  width: 6px;
  height: 6px;
  background: var(--paper-soft);
  border-radius: 50%;
  animation: typing-dots 1.4s infinite ease-in-out;
}

.tehub-typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.tehub-typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

/* Quick Replies (Preset FAQ chips) */
.tehub-quick-replies {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--chat-border);
  background: rgba(24, 24, 28, 0.3);
}

.tehub-quick-replies-title {
  font-size: 0.75rem;
  color: var(--paper-mute);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.tehub-quick-replies-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-height: 96px;
  overflow-y: auto;
}

.tehub-reply-btn {
  background: var(--chat-card);
  border: 1px solid var(--chat-border);
  color: var(--paper-soft);
  padding: 8px 12px;
  border-radius: 30px;
  font-size: 0.8125rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  font-family: var(--font-body), sans-serif;
}

.tehub-reply-btn:hover {
  background: var(--chat-border);
  color: var(--lime);
  border-color: var(--lime-soft);
  transform: translateY(-1px);
}

/* Footer / Input area */
.tehub-chat-input-container {
  padding: 12px 20px;
  background: rgba(10, 10, 12, 0.95);
  border-top: 1px solid var(--chat-border);
  display: flex;
  gap: 8px;
  align-items: center;
}

.tehub-chat-input {
  flex: 1;
  background: var(--chat-card);
  border: 1px solid var(--chat-border);
  color: var(--paper);
  padding: 10px 14px;
  border-radius: 24px;
  font-size: 0.875rem;
  outline: none;
  font-family: var(--font-body), sans-serif;
  transition: border-color 0.2s ease;
}

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

.tehub-chat-input::placeholder {
  color: var(--paper-mute);
}

.tehub-chat-send {
  background: var(--lime);
  color: var(--ink-000);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

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

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

/* Animations */
@keyframes pulse-red {
  0% { box-shadow: 0 0 0 0 rgba(255, 74, 74, 0.7); }
  70% { box-shadow: 0 0 0 6px rgba(255, 74, 74, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 74, 74, 0); }
}

@keyframes typing-dots {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50% { transform: translateY(-4px); opacity: 1; }
}

@keyframes message-pop {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Responsive adjustment */
@media (max-width: 480px) {
  .tehub-chat-widget {
    bottom: 16px;
    right: 16px;
  }
  .tehub-chat-window {
    width: calc(100vw - 32px);
    height: 480px;
    bottom: 12px;
  }
}