/* ============================================
   DEMO CHAT PAGE — css/demo.css
   Full-screen chat UI for chatbot demo
   ============================================ */

/* ── Active nav link ── */
.nav-link-active {
  color: var(--color-brand-300) !important;
}

.navbar-nav .nav-link-active {
  position: relative;
}

.nav-link-active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-brand-400);
  box-shadow: 0 0 8px var(--color-brand-400);
}

/* ── Page Shell ── */

html, body {
  height: 100%;
}

.demo-page {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
}

/* Override fixed position so navbar participates in flex flow */
.demo-page .navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  flex-shrink: 0;
}

.demo-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* ── Chat Container ── */

.demo-chat-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--container-pad);
  box-sizing: border-box;
}

/* ── Chat Header Bar ── */

.demo-chat-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-bg-border);
}

.demo-bot-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.demo-bot-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-brand-600), var(--color-brand-400));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  box-shadow: 0 0 20px var(--color-brand-glow-soft);
}

.demo-bot-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.demo-bot-name {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  line-height: 1.2;
}

.demo-bot-status {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}

.demo-status-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-success);
  animation: demo-pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes demo-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.demo-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.demo-powered {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  display: none;
}

@media (min-width: 640px) {
  .demo-powered {
    display: block;
  }
}

/* ── Scenario Selector ── */

.demo-scenario-select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  padding: 8px 32px 8px 12px;
  cursor: pointer;
  min-width: 160px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23a0a0b8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round' viewBox='0 0 24 24'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.demo-scenario-select:hover,
.demo-scenario-select:focus {
  border-color: var(--color-brand-400);
  box-shadow: 0 0 0 3px var(--color-brand-glow-soft);
  outline: none;
}

.demo-scenario-select option {
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
}

/* ── Messages Area ── */

.demo-messages {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

.demo-messages::-webkit-scrollbar {
  width: 4px;
}
.demo-messages::-webkit-scrollbar-track {
  background: transparent;
}
.demo-messages::-webkit-scrollbar-thumb {
  background: var(--color-bg-border);
  border-radius: var(--radius-full);
}

/* ── Message Rows ── */

.demo-msg {
  display: flex;
  flex-direction: column;
  max-width: 75%;
  animation: demo-msg-in 0.25s ease-out;
}

@keyframes demo-msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.demo-msg--bot {
  align-self: flex-start;
  align-items: flex-start;
}

.demo-msg--user {
  align-self: flex-end;
  align-items: flex-end;
}

.demo-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: 1.65;
  word-break: break-word;
}

.demo-msg--bot .demo-bubble {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-border);
  color: var(--color-text-secondary);
  border-radius: 4px var(--radius-md) var(--radius-md) var(--radius-md);
}

.demo-msg--bot .demo-bubble p { margin: 0 0 8px; color: var(--color-text-secondary); }
.demo-msg--bot .demo-bubble p:last-child { margin-bottom: 0; }
.demo-msg--bot .demo-bubble strong { color: var(--color-text-primary); }
.demo-msg--bot .demo-bubble ul,
.demo-msg--bot .demo-bubble ol { padding-left: 16px; margin: 4px 0; }
.demo-msg--bot .demo-bubble li { margin-bottom: 4px; }
.demo-msg--bot .demo-bubble code {
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.85em;
}

.demo-msg--user .demo-bubble {
  background: linear-gradient(135deg, var(--color-brand-600), var(--color-brand-500));
  color: var(--color-white);
  border-radius: var(--radius-md) 4px var(--radius-md) var(--radius-md);
  box-shadow: 0 0 20px var(--color-brand-glow-soft);
}

.demo-msg-time {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-top: 4px;
  padding: 0 2px;
}

.demo-bubble.is-error {
  border-color: rgba(239,68,68,0.3);
  color: #fca5a5;
}

/* ── Typing Indicator ── */

.demo-typing {
  display: flex;
  align-items: flex-start;
  animation: demo-msg-in 0.2s ease-out;
}

.demo-typing-bubble {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-border);
  border-radius: 4px var(--radius-md) var(--radius-md) var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.demo-typing-dot {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-full);
  background: var(--color-brand-400);
  animation: demo-dot-bounce 1.2s ease-in-out infinite;
}

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

@keyframes demo-dot-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30%           { transform: translateY(-6px); opacity: 1; }
}

/* ── Suggested Questions ── */

.demo-suggested {
  flex-shrink: 0;
  padding: 10px 0;
  border-top: 1px solid var(--color-bg-border);
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}

.demo-suggested::-webkit-scrollbar {
  display: none;
}

.demo-suggested.is-hidden {
  display: none;
}

.demo-chip {
  flex-shrink: 0;
  padding: 7px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-bg-border);
  background: var(--color-bg-surface);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  cursor: pointer;
  white-space: nowrap;
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
  touch-action: manipulation;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.demo-chip:hover,
.demo-chip:focus-visible {
  border-color: var(--color-brand-400);
  color: var(--color-brand-300);
  background: var(--color-brand-glow-soft);
  outline: none;
}

/* ── Input Bar ── */

.demo-input-bar {
  flex-shrink: 0;
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 14px 0 20px;
  border-top: 1px solid var(--color-bg-border);
}

.demo-input {
  flex: 1;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  padding: 12px 16px;
  min-height: 44px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

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

.demo-input:focus {
  border-color: var(--color-brand-400);
  box-shadow: 0 0 0 3px var(--color-brand-glow-soft);
}

.demo-input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.demo-send-btn {
  flex-shrink: 0;
  min-width: 44px;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-brand-600), var(--color-brand-500));
  border: none;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: opacity var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.demo-send-btn:hover:not(:disabled) {
  box-shadow: var(--shadow-btn);
  transform: translateY(-1px);
}

.demo-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.demo-send-btn svg {
  flex-shrink: 0;
}

/* ── Rate Limit Notice ── */

.demo-rate-notice {
  flex-shrink: 0;
  text-align: center;
  padding: 10px 0 16px;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ── CTA Banner (fixed, slides up after 3 turns) ── */

.demo-cta-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: linear-gradient(
    135deg,
    rgba(109, 40, 217, 0.95),
    rgba(124, 58, 237, 0.95)
  );
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 16px var(--container-pad);
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
  box-shadow: 0 -8px 32px rgba(109,40,217,0.35);
}

.demo-cta-banner.is-visible {
  transform: translateY(0);
  pointer-events: auto;
}

.demo-cta-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.demo-cta-text {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-body);
  line-height: 1.4;
}

.demo-cta-text strong {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-white);
  margin-bottom: 2px;
}

.demo-cta-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.demo-cta-dismiss {
  background: none;
  border: none;
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  padding: 6px;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast);
}

.demo-cta-dismiss:hover {
  color: var(--color-white);
}

/* ── Responsive: mobile ── */

@media (max-width: 639px) {
  .demo-chat-container {
    padding: 0 16px;
  }

  .demo-msg {
    max-width: 88%;
  }

  .demo-chat-header {
    padding: 12px 0;
  }

  .demo-bot-name {
    font-size: var(--text-sm);
  }

  .demo-scenario-select {
    min-width: 130px;
    font-size: var(--text-xs);
  }

  .demo-send-btn {
    padding: 0 14px;
  }

  .demo-send-btn .btn-label {
    display: none;
  }

  .demo-cta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .demo-cta-actions {
    width: 100%;
    justify-content: space-between;
  }
}

/* ── Reduced motion ── */

@media (prefers-reduced-motion: reduce) {
  .demo-msg { animation: none; }
  .demo-typing-dot { animation: none; opacity: 0.6; }
  .demo-status-dot { animation: none; }
  .demo-cta-banner { transition: none; }
}