:root {
  --primary-chat-ai-color: #0073aa;
  --primary-chat-ai-logo-color: #FFFFFF;
  --secondary-chat-ai-color: #005f94;
  --chat-ai-btn-top: auto;
  --chat-ai-btn-right: 20px;
  --chat-ai-btn-bottom: 20px;
  --chat-ai-btn-left: auto;
  --chat-ai-win-top: auto;
  --chat-ai-win-right: 20px;
  --chat-ai-win-bottom: 92px;
  --chat-ai-win-left: auto;
  --chat-ai-font-family: Arial, sans-serif;
  --chat-ai-font-size: 14px;
  /* Palette neutre de la fenêtre (identique quel que soit le client) */
  --chat-ai-bg: #f6f7fb;
  --chat-ai-surface: #ffffff;
  --chat-ai-border: #e6e8f0;
  --chat-ai-text: #1e2130;
  --chat-ai-muted: #6b7080;
  --chat-ai-faint: #8a90a3;
  --chat-ai-online: #2ecc71;
}

/* ---------- Bouton flottant ---------- */
#chat-toggle {
  position: fixed;
  top: var(--chat-ai-btn-top);
  right: var(--chat-ai-btn-right);
  bottom: var(--chat-ai-btn-bottom);
  left: var(--chat-ai-btn-left);
  background: var(--primary-chat-ai-color);
  color: var(--primary-chat-ai-logo-color);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0,0,0,0.22);
  z-index: 1000;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

#chat-toggle svg {
  width: 28px;
  height: 28px;
  display: block;
}

#chat-toggle #chat-notif {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 20px;
  height: 20px;
  padding: 0;
  box-sizing: border-box;
  background: red;
  color: #fff;
  font-family: var(--chat-ai-font-family);
  font-size: 12px;
  font-weight: 600;
  border-radius: 50%;
  line-height: 20px;
  text-align: center;
  display: none;
}

#chat-toggle:hover {
  transform: scale(1.06);
  box-shadow: 0 12px 28px rgba(0,0,0,0.28);
  background: var(--secondary-chat-ai-color);
}

/* ---------- Fenêtre ---------- */
#chat-window {
  position: fixed;
  top: var(--chat-ai-win-top);
  right: var(--chat-ai-win-right);
  bottom: var(--chat-ai-win-bottom);
  left: var(--chat-ai-win-left);
  width: 380px;
  max-width: calc(100vw - 40px);
  height: 600px;
  max-height: calc(100vh - 120px);
  max-height: calc(100dvh - 120px);
  background-color: var(--chat-ai-bg);
  border: none;
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 16px 48px rgba(20,25,60,0.18), 0 2px 6px rgba(20,25,60,0.08);
  z-index: 1000;
  overflow: hidden;
  font-family: var(--chat-ai-font-family);
  font-size: var(--chat-ai-font-size);
  color: var(--chat-ai-text);
  line-height: 1.5;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.97);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}

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

#chat-window *,
#chat-window *::before,
#chat-window *::after {
  box-sizing: border-box;
}

/* ---------- En-tête ---------- */
#chat-header {
  flex-shrink: 0;
  min-height: 68px;
  padding: 12px 10px 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--primary-chat-ai-color);
  color: var(--primary-chat-ai-logo-color);
}

#chat-header .chat-ai-avatar {
  position: relative;
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 15px;
  background: rgba(255,255,255,0.18);
  color: inherit;
  text-transform: uppercase;
}

#chat-header .chat-ai-avatar.chat-ai-avatar-photo {
  background: var(--chat-ai-surface);
  overflow: visible;
}

#chat-header .chat-ai-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  display: block;
  margin: 0;
  padding: 0;
  border: none;
  box-shadow: none;
}

#chat-header .chat-ai-avatar::after {
  content: '';
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--chat-ai-online);
  border: 2px solid var(--primary-chat-ai-color);
}

#chat-header .chat-ai-identity {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

#chat-header .chat-ai-name {
  font-weight: 400;
  font-size: 1.07em;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#chat-header .chat-ai-status {
  font-size: 0.86em;
  opacity: 0.8;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#chat-header button {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  color: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
  box-shadow: none;
}

#chat-header button:hover {
  background: rgba(255,255,255,0.24);
  border: none;
}

#chat-header svg {
  width: 20px;
  height: 20px;
  vertical-align: middle;
}

/* Variante B : en-tête clair avec liseré de couleur */
#chat-window.chat-ai-header-light #chat-header {
  background-color: var(--chat-ai-surface);
  color: var(--chat-ai-text);
  border-top: 4px solid var(--primary-chat-ai-color);
  border-bottom: 1px solid var(--chat-ai-border);
}

#chat-window.chat-ai-header-light #chat-header .chat-ai-avatar {
  background: var(--primary-chat-ai-color);
  color: var(--primary-chat-ai-logo-color);
}

#chat-window.chat-ai-header-light #chat-header .chat-ai-avatar.chat-ai-avatar-photo {
  background: var(--chat-ai-surface);
  overflow: visible;
}

#chat-header .chat-ai-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  display: block;
  margin: 0;
  padding: 0;
  border: none;
  box-shadow: none;
}

#chat-header .chat-ai-avatar::after {
  border-color: var(--chat-ai-surface);
}

#chat-window.chat-ai-header-light #chat-header .chat-ai-status {
  opacity: 1;
  color: var(--chat-ai-muted);
}

#chat-window.chat-ai-header-light #chat-header button {
  background: #f3f4f8;
  color: #4a4f63;
}

#chat-window.chat-ai-header-light #chat-header button:hover {
  background: #e6e8f0;
}

/* ---------- Zone des messages ---------- */
#chat-messages {
  flex: 1;
  min-height: 0;
  padding: 16px 16px 8px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

#chat-messages::-webkit-scrollbar {
  width: 6px;
}

#chat-messages::-webkit-scrollbar-thumb {
  background: #d3d6e0;
  border-radius: 3px;
}

#chat-messages .message {
  position: relative;
  max-width: 82%;
  margin: 0 0 14px;
  padding: 11px 14px;
  border-radius: 16px;
  font-size: 1em;
  line-height: 1.5;
  overflow-wrap: anywhere;
  animation: fade-in 0.25s ease;
}

#chat-messages .message p {
  margin: 0 0 0.6em;
}

#chat-messages .message p:last-of-type {
  margin-bottom: 0;
}

#chat-messages .message a {
  color: inherit;
  text-decoration: underline;
}

#chat-messages .message.received {
  align-self: flex-start;
  background-color: var(--chat-ai-surface);
  color: var(--chat-ai-text);
  border: 1px solid var(--chat-ai-border);
  border-bottom-left-radius: 4px;
  box-shadow: 0 1px 2px rgba(20,25,60,0.04);
}

#chat-messages .message.sent {
  align-self: flex-end;
  background-color: var(--primary-chat-ai-color);
  color: var(--primary-chat-ai-logo-color);
  border-bottom-right-radius: 4px;
  text-align: left;
}

#chat-messages .message.sent a {
  color: inherit;
}

/* Horodatage : sous la bulle, hors du cadre */
#chat-messages .timestamp {
  position: absolute;
  top: 100%;
  margin-top: 3px;
  font-size: 11px;
  line-height: 1.2;
  color: var(--chat-ai-faint);
  white-space: nowrap;
}

#chat-messages .message.received .timestamp {
  left: 4px;
}

#chat-messages .message.sent .timestamp {
  right: 4px;
}

/* Indicateur « en train d'écrire » */
#chat-messages .chat-loading {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 13px 16px;
  margin: 0 0 4px;
  background: var(--chat-ai-surface);
  border: 1px solid var(--chat-ai-border);
  border-radius: 16px;
  border-bottom-left-radius: 4px;
  max-width: fit-content;
  animation: fade-in 0.25s ease;
}

#chat-messages .chat-loading .dot {
  width: 7px;
  height: 7px;
  margin: 0;
  background-color: #9096ab;
  border-radius: 50%;
  animation: blink 1.4s infinite both;
}

#chat-messages .chat-loading .dot:nth-child(2) {
  animation-delay: 0.2s;
}

#chat-messages .chat-loading .dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes blink {
  0%, 80%, 100% { opacity: 0.25; }
  40% { opacity: 1; }
}

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

/* ---------- Champ de saisie ---------- */
#chat-input {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--chat-ai-surface);
  border-top: 1px solid var(--chat-ai-border);
}

#chat-input input {
  flex: 1;
  min-width: 0;
  height: 44px;
  margin: 0;
  padding: 0 16px;
  border: 1.5px solid #e3e5ee;
  border-radius: 22px;
  background-color: #f9fafc;
  color: var(--chat-ai-text);
  font-family: inherit;
  font-size: 1em;
  line-height: 44px;
  outline: none;
  box-shadow: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

#chat-input input::placeholder {
  color: var(--chat-ai-faint);
}

#chat-input input:focus {
  background-color: var(--chat-ai-surface);
  border-color: var(--primary-chat-ai-color);
  outline: none;
  box-shadow: none;
}

#chat-input button {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 50%;
  background-color: var(--primary-chat-ai-color);
  color: var(--primary-chat-ai-logo-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: none;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

#chat-input button svg {
  width: 18px;
  height: 18px;
  display: block;
}

#chat-input button:hover {
  background-color: var(--secondary-chat-ai-color);
  transform: scale(1.05);
}

.chat-ai-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Pied ---------- */
#chat-powered-by {
  flex-shrink: 0;
  text-align: center;
  font-size: 11px;
  margin: 0;
  padding: 0 0 10px;
  background: var(--chat-ai-surface);
  color: #9a9fb2;
}

#chat-powered-by a {
  color: var(--chat-ai-muted);
  text-decoration: none;
  font-weight: 500;
}

/* ---------- Notation ---------- */
#chat-rating {
  padding: 12px 14px;
  display: none;
  flex-direction: column;
  gap: 8px;
}

#chat-rating.message,
#chat-thank.message {
  align-self: flex-start;
  max-width: 82%;
  background-color: var(--chat-ai-surface);
  border: 1px solid var(--chat-ai-border);
  border-radius: 16px;
  border-bottom-left-radius: 4px;
  margin-bottom: 10px;
}

#chat-rating p {
  margin-bottom: 0;
}

#chat-rating button {
  background-color: transparent;
  border: 1px solid var(--primary-chat-ai-color);
  border-radius: 20px;
  color: var(--primary-chat-ai-color);
  display: inline-block;
  font-size: 0.95em;
  font-weight: 500;
  padding: 0.45rem 1rem;
  text-align: center;
  transition: all .2s;
  user-select: none;
  white-space: nowrap;
  cursor: pointer;
}

#chat-rating button:hover {
  background-color: var(--primary-chat-ai-color);
  color: var(--primary-chat-ai-logo-color);
}

#chat-rating .stars {
  display: flex;
  gap: 5px;
  cursor: pointer;
}

#chat-rating .star {
  font-size: 20px;
  color: #ccc;
}

#chat-rating .star.filled {
  color: var(--primary-chat-ai-color);
}

#chat-rating textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--chat-ai-border);
  border-radius: 10px;
  padding: 8px;
  font-family: inherit;
}

#chat-thank {
  padding: 10px;
  text-align: center;
  display: none;
}

/* ---------- Rebond du bouton ---------- */
@keyframes chat-ai-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

#chat-toggle.chat-move {
  animation: chat-ai-bounce 0.6s ease-in-out 5;
}

/* ---------- Bulle déclencheur ---------- */
#chat-trigger-bubble {
  position: fixed;
  background: var(--chat-ai-surface);
  border: 1px solid var(--chat-ai-border);
  border-radius: 14px;
  padding: 10px 28px 10px 14px;
  box-shadow: 0 8px 24px rgba(20,25,60,0.14);
  max-width: 300px;
  z-index: 1000;
  font-family: var(--chat-ai-font-family);
  font-size: var(--chat-ai-font-size);
  color: var(--chat-ai-text);
  line-height: 1.45;
}

#chat-trigger-bubble.arrow-right::before,
#chat-trigger-bubble.arrow-right::after,
#chat-trigger-bubble.arrow-left::before,
#chat-trigger-bubble.arrow-left::after {
  content: '';
  position: absolute;
  top: var(--chat-trigger-arrow-top, 50%);
  transform: translateY(-50%);
  border-style: solid;
}

#chat-trigger-bubble.arrow-right::before {
  right: -10px;
  border-width: 10px 0 10px 10px;
  border-color: transparent transparent transparent var(--chat-ai-border);
}

#chat-trigger-bubble.arrow-right::after {
  right: -9px;
  border-width: 9px 0 9px 9px;
  border-color: transparent transparent transparent var(--chat-ai-surface);
}

#chat-trigger-bubble.arrow-left::before {
  left: -10px;
  border-width: 10px 10px 10px 0;
  border-color: transparent var(--chat-ai-border) transparent transparent;
}

#chat-trigger-bubble.arrow-left::after {
  left: -9px;
  border-width: 9px 9px 9px 0;
  border-color: transparent var(--chat-ai-surface) transparent transparent;
}

#chat-trigger-bubble .chat-trigger-close {
  position: absolute;
  top: 6px;
  right: 10px;
  cursor: pointer;
  font-weight: bold;
  color: var(--chat-ai-faint);
}

/* ---------- Mobile : plein écran ---------- */
@media (max-width: 600px) {
  #chat-window {
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100vw;
    max-width: none;
    height: 100vh;
    height: 100dvh;
    max-height: none;
    border-radius: 0;
    transform: translateY(24px);
  }
  #chat-window.open {
    transform: translateY(0);
  }
  #chat-header {
    min-height: 76px;
    padding-top: calc(12px + env(safe-area-inset-top, 0px));
  }
  #chat-header button {
    width: 44px;
    height: 44px;
  }
  #chat-input {
    padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
  }
  #chat-input input {
    height: 48px;
    line-height: 48px;
    border-radius: 24px;
    font-size: 16px; /* évite le zoom automatique iOS */
  }
  #chat-input button {
    width: 48px;
    height: 48px;
  }
  #chat-powered-by {
    padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
  }
}