/* ==========================================================================
   CuonzChatbot — reusable chat widget styles
   Inherits client brand tokens via CSS custom properties.
   Standalone fallbacks for projects without a token system.
   ========================================================================== */

:root {
  /* Surface */
  --chat-bg: var(--color-surface, #ffffff);
  --chat-bg-alt: var(--color-surface-alt, #f7f7f8);
  --chat-bg-dark: var(--color-surface-dark, #17191c);
  --chat-border: var(--color-border, #e2e2e6);

  /* Text */
  --chat-text: var(--color-text, #1a1a1e);
  --chat-text-muted: var(--color-text-muted, #6b6e76);
  --chat-text-on-accent: var(--color-accent-text, #ffffff);

  /* Accent */
  --chat-accent: var(--color-accent, #2563eb);
  --chat-accent-hover: var(--color-accent-hover, #1d4ed8);

  /* Typography */
  --chat-font: var(--font-family-sans, system-ui, -apple-system, 'Segoe UI', sans-serif);
  --chat-font-heading: var(--font-family-heading, var(--chat-font));

  /* Geometry */
  --chat-radius: var(--radius-lg, 0.75rem);
  --chat-radius-sm: var(--radius-md, 0.5rem);
  --chat-radius-pill: 999px;

  /* Shadow */
  --chat-shadow: var(--shadow-lg, 0 10px 25px -5px rgba(0, 0, 0, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.06));

  /* Motion */
  --chat-transition: var(--transition-base, 200ms ease);

  /* Layout */
  --chat-panel-width: 22rem;
  --chat-panel-height: 32rem;
  --chat-offset: 1.25rem;
}

/* ─── Root / toggle ──────────────────────────────────────────────────── */

.chatbot {
  position: fixed;
  z-index: 9990;
  font-family: var(--chat-font);
  color: var(--chat-text);
  line-height: 1.45;
}

.chatbot--bottom-right {
  right: var(--chat-offset);
  bottom: var(--chat-offset);
}

.chatbot--bottom-left {
  left: var(--chat-offset);
  bottom: var(--chat-offset);
}

.chatbot-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border: 0;
  border-radius: var(--chat-radius-pill);
  background: var(--chat-accent);
  color: var(--chat-text-on-accent);
  cursor: pointer;
  box-shadow: var(--chat-shadow);
  transition: transform var(--chat-transition), background var(--chat-transition);
}

.chatbot-toggle:hover {
  background: var(--chat-accent-hover);
  transform: scale(1.05);
}

.chatbot-toggle:focus-visible {
  outline: 2px solid var(--chat-accent);
  outline-offset: 3px;
}

.chatbot-toggle__icon,
.chatbot-toggle__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.chatbot-toggle__close {
  display: none;
}

.chatbot--open .chatbot-toggle__icon {
  display: none;
}

.chatbot--open .chatbot-toggle__close {
  display: inline-flex;
}

/* ─── Panel ──────────────────────────────────────────────────────────── */

.chatbot-panel {
  position: absolute;
  right: 0;
  bottom: calc(3.25rem + 0.75rem);
  display: flex;
  flex-direction: column;
  width: min(var(--chat-panel-width), calc(100vw - 2rem));
  height: min(var(--chat-panel-height), calc(100vh - 6rem));
  background: var(--chat-bg);
  border: 1px solid var(--chat-border);
  border-radius: var(--chat-radius);
  box-shadow: var(--chat-shadow);
  overflow: hidden;
  opacity: 0;
  transform: translateY(0.5rem) scale(0.98);
  pointer-events: none;
  transition: opacity var(--chat-transition), transform var(--chat-transition);
}

.chatbot--bottom-left .chatbot-panel {
  right: auto;
  left: 0;
}

.chatbot--open .chatbot-panel {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.chatbot-panel[hidden] {
  display: none !important;
}

/* ─── Header ─────────────────────────────────────────────────────────── */

.chatbot-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: var(--chat-bg-dark);
  color: var(--chat-bg);
}

.chatbot-header__title {
  font-family: var(--chat-font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.chatbot-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: 0;
  border-radius: var(--chat-radius-pill);
  background: transparent;
  color: inherit;
  cursor: pointer;
  opacity: 0.85;
}

.chatbot-close:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.1);
}

/* ─── Log / messages ─────────────────────────────────────────────────── */

.chatbot-log {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 1rem;
  background: var(--chat-bg-alt);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  scroll-behavior: smooth;
}

.chatbot-msg {
  display: flex;
}

.chatbot-msg--user {
  justify-content: flex-end;
}

.chatbot-bubble {
  max-width: 85%;
  padding: 0.65rem 0.85rem;
  border-radius: var(--chat-radius-sm);
  background: var(--chat-bg);
  border: 1px solid var(--chat-border);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
}

.chatbot-msg--user .chatbot-bubble {
  background: var(--chat-accent);
  border-color: var(--chat-accent);
  color: var(--chat-text-on-accent);
}

.chatbot-bubble a {
  color: var(--chat-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.chatbot-msg--user .chatbot-bubble a {
  color: var(--chat-text-on-accent);
}

.chatbot-typing {
  font-size: 0.85rem;
  color: var(--chat-text-muted);
  font-style: italic;
}

.chatbot-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.65rem;
}

.chatbot-action {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  border-radius: var(--chat-radius-pill);
  border: 1px solid var(--chat-accent);
  background: transparent;
  color: var(--chat-accent);
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--chat-transition), color var(--chat-transition);
}

.chatbot-action:hover {
  background: var(--chat-accent);
  color: var(--chat-text-on-accent);
}

.chatbot-msg--user .chatbot-action {
  border-color: var(--chat-text-on-accent);
  color: var(--chat-text-on-accent);
}

.chatbot-bubble__suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.65rem;
}

/* ─── Chips ──────────────────────────────────────────────────────────── */

.chatbot-chip {
  padding: 0.35rem 0.75rem;
  border-radius: var(--chat-radius-pill);
  border: 1px solid var(--chat-border);
  background: var(--chat-bg);
  color: var(--chat-text);
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--chat-transition), color var(--chat-transition);
}

.chatbot-chip:hover {
  border-color: var(--chat-accent);
  color: var(--chat-accent);
}

.chatbot-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.55rem 0.75rem;
  background: var(--chat-bg);
  border-top: 1px solid var(--chat-border);
}

.chatbot-suggestions[hidden] {
  display: none !important;
}

/* ─── Form ───────────────────────────────────────────────────────────── */

.chatbot-footer {
  background: var(--chat-bg);
  border-top: 1px solid var(--chat-border);
  padding: 0.65rem 0.75rem 0.75rem;
}

.chatbot-form {
  display: flex;
  gap: 0.45rem;
  align-items: center;
}

.chatbot-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--chat-border);
  border-radius: var(--chat-radius-pill);
  background: var(--chat-bg-alt);
  color: var(--chat-text);
  font-family: inherit;
  font-size: 0.9rem;
}

.chatbot-input:focus {
  outline: 2px solid var(--chat-accent);
  outline-offset: 1px;
  border-color: transparent;
}

.chatbot-input:disabled {
  opacity: 0.6;
}

.chatbot-send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border: 0;
  border-radius: var(--chat-radius-pill);
  background: var(--chat-accent);
  color: var(--chat-text-on-accent);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--chat-transition);
}

.chatbot-send:hover:not(:disabled) {
  background: var(--chat-accent-hover);
}

.chatbot-send:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.chatbot-privacy {
  margin: 0.45rem 0 0;
  font-size: 0.68rem;
  color: var(--chat-text-muted);
  line-height: 1.35;
}

/* ─── Mobile ─────────────────────────────────────────────────────────── */

@media (max-width: 480px) {
  .chatbot {
    --chat-offset: 0.75rem;
    --chat-panel-width: calc(100vw - 1.5rem);
  }

  .chatbot-panel {
    height: min(70vh, 28rem);
  }
}

/* ─── Reduced motion ─────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .chatbot-toggle,
  .chatbot-panel,
  .chatbot-action,
  .chatbot-chip,
  .chatbot-send {
    transition: none;
  }
}