/**
 * Spine HR Chatbot — Frontend Widget Styles  (v1.1)
 * Modern glassmorphic SaaS design, fully responsive
 *
 * v1.1 additions:
 *   - .spine-chat__branch-panel  (4-option initial routing panel)
 *   - .spine-chat__branch-btn    (card-style branch buttons; --support variant; --loading state)
 *   - .spine-chat__input-area--locked  (before branch selection)
 *   - .spine-chat__input-area--frozen  (support branch / session closed)
 *   - .spine-msg__link           (mailto & learn-more anchors inside bot bubbles)
 *   - .spine-chat__agent-offer   (Talk to an Agent / Leave Details inline offer)
 *   - .spine-chat__btn--sm       (smaller button variant)
 *   - .spine-chat__status-dot--online / --pending  (extended status dot variants)
 *
 * @version 1.1.0
 */

/* ── Custom Properties ─────────────────────────────────────────────────────── */
:root {
  --spine-accent:       #1d4ed8;
  --spine-primary:      #0891b2;
  --spine-accent-dark:  #1e40af;
  --spine-white:        #ffffff;
  --spine-gray-50:      #f9fafb;
  --spine-gray-100:     #f3f4f6;
  --spine-gray-200:     #e5e7eb;
  --spine-gray-400:     #9ca3af;
  --spine-gray-600:     #4b5563;
  --spine-gray-800:     #1f2937;
  --spine-shadow-lg:    0 20px 60px rgba(0,0,0,.18), 0 4px 16px rgba(0,0,0,.08);
  --spine-shadow-btn:   0 4px 14px rgba(29,78,216,.4);
  --spine-radius:       20px;
  --spine-radius-msg:   14px;
  --spine-font:         -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --spine-w:            380px;
  --spine-h:            580px;
  --spine-z:            999999;
  --spine-offset:       24px;
  --spine-transition:   .28s cubic-bezier(.4,0,.2,1);
}

/* ── Root container ────────────────────────────────────────────────────────── */
.spine-chat {
  position: fixed;
  bottom: var(--spine-offset);
  right:  var(--spine-offset);
  z-index: var(--spine-z);
  font-family: var(--spine-font);
  font-size: 14px;
  line-height: 1.5;
  color: var(--spine-gray-800);
  -webkit-font-smoothing: antialiased;
}

.spine-chat--bottom-left {
  right: unset;
  left: var(--spine-offset);
}

/* ── Launcher Button ───────────────────────────────────────────────────────── */
.spine-chat__launcher {
  position: relative;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, var(--spine-accent) 0%, var(--spine-primary) 100%);
  box-shadow: var(--spine-shadow-btn), 0 0 0 0 rgba(29,78,216,.5);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    transform var(--spine-transition),
    box-shadow var(--spine-transition);
  animation: spine-pulse-ring 3s ease infinite;
  outline: none;
}

.spine-chat__launcher:hover {
  transform: scale(1.08);
  box-shadow: var(--spine-shadow-btn), 0 0 0 8px rgba(29,78,216,.12);
}

.spine-chat__launcher:focus-visible {
  outline: 3px solid var(--spine-accent);
  outline-offset: 3px;
}

.spine-chat__launcher-icon,
.spine-chat__launcher-close {
  width: 28px;
  height: 28px;
  transition: opacity var(--spine-transition), transform var(--spine-transition);
  position: absolute;
}

.spine-chat__launcher-close {
  opacity: 0;
  transform: rotate(90deg) scale(.6);
}

.spine-chat__launcher-img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  transition: opacity var(--spine-transition);
}

/* When chat is open — swap icons */
.spine-chat.spine-chat--open .spine-chat__launcher-icon,
.spine-chat.spine-chat--open .spine-chat__launcher-img {
  opacity: 0;
  transform: scale(.6);
}

.spine-chat.spine-chat--open .spine-chat__launcher-close {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* Unread badge */
.spine-chat__unread-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 20px;
  height: 20px;
  background: #ef4444;
  border-radius: 50%;
  border: 2px solid #fff;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: spine-bounce .5s ease;
}

/* ── Chat Window ───────────────────────────────────────────────────────────── */
.spine-chat__window {
  position: absolute;
  bottom: 72px;
  right: 0;
  width: var(--spine-w);
  max-height: var(--spine-h);
  background: var(--spine-white);
  border-radius: var(--spine-radius);
  box-shadow: var(--spine-shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform-origin: bottom right;
  /* Default state — hidden via HTML hidden attr; this sets the visual starting point */
  transform: scale(.92) translateY(16px);
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--spine-transition),
    opacity var(--spine-transition);
  will-change: transform, opacity;
}

.spine-chat--bottom-left .spine-chat__window {
  right: unset;
  left: 0;
  transform-origin: bottom left;
}

/* Open state — driven by root class (widget visible = hidden attr removed + open class added) */
.spine-chat--open .spine-chat__window {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: all;
}

/* Legacy class-based open state (backward compat with any external code) */
.spine-chat__window.spine-chat__window--open {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: all;
}

/* ── Header ────────────────────────────────────────────────────────────────── */
.spine-chat__header {
  background: linear-gradient(135deg, var(--spine-accent) 0%, var(--spine-primary) 100%);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  position: relative;
}

.spine-chat__header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0; right: 0;
  height: 1px;
  background: rgba(255,255,255,.15);
}

.spine-chat__header-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,.15);
  backdrop-filter: blur(8px);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spine-chat__header-avatar svg { width: 24px; height: 24px; }

.spine-chat__header-info {
  flex: 1;
  min-width: 0;
}

.spine-chat__header-name {
  display: block;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.spine-chat__header-status {
  display: flex;
  align-items: center;
  gap: 5px;
  color: rgba(255,255,255,.8);
  font-size: 12px;
  margin-top: 2px;
}

.spine-chat__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 2px rgba(74,222,128,.3);
  animation: spine-status-pulse 2s ease infinite;
  flex-shrink: 0;
}

/* Status dot variants */
.spine-chat__status-dot--online  { background: #4ade80; }
.spine-chat__status-dot--pending { background: #fb923c; animation: spine-status-pulse-orange 1.4s ease infinite; }
.spine-chat__status-dot--away    { background: #facc15; }
.spine-chat__status-dot--offline { background: #9ca3af; animation: none; }

.spine-chat__header-actions {
  display: flex;
  gap: 4px;
}

.spine-chat__header-btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,.15);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--spine-transition);
  padding: 0;
}

.spine-chat__header-btn:hover { background: rgba(255,255,255,.28); }
.spine-chat__header-btn svg { width: 16px; height: 16px; }

/* ── Messages ──────────────────────────────────────────────────────────────── */
.spine-chat__messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
  overscroll-behavior: contain;
}

.spine-chat__messages::-webkit-scrollbar { width: 4px; }
.spine-chat__messages::-webkit-scrollbar-track { background: transparent; }
.spine-chat__messages::-webkit-scrollbar-thumb { background: var(--spine-gray-200); border-radius: 4px; }

/* Message bubble */
.spine-msg {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  animation: spine-msg-in .25s cubic-bezier(.4,0,.2,1);
  max-width: 100%;
}

.spine-msg--user { flex-direction: row-reverse; }

.spine-msg__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--spine-accent), var(--spine-primary));
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.spine-msg__avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.spine-msg__bubble {
  max-width: 78%;
  padding: 10px 13px;
  border-radius: var(--spine-radius-msg);
  font-size: 13.5px;
  line-height: 1.55;
  word-wrap: break-word;
  white-space: pre-wrap;
}

/* Bot / Agent bubble */
.spine-msg--bot  .spine-msg__bubble,
.spine-msg--agent .spine-msg__bubble {
  background: var(--spine-gray-100);
  color: var(--spine-gray-800);
  border-bottom-left-radius: 4px;
}

/* User bubble */
.spine-msg--user .spine-msg__bubble {
  background: linear-gradient(135deg, var(--spine-accent), var(--spine-primary));
  color: #fff;
  border-bottom-right-radius: 4px;
}

.spine-msg__bubble strong { font-weight: 700; display: block; margin-bottom: 2px; }
.spine-msg__bubble ul { margin: 4px 0 0 14px; padding: 0; }
.spine-msg__bubble li { margin-bottom: 2px; }

.spine-msg__time {
  font-size: 10.5px;
  color: var(--spine-gray-400);
  margin-top: 3px;
  display: block;
  text-align: right;
}

.spine-msg--bot  .spine-msg__time,
.spine-msg--agent .spine-msg__time { text-align: left; }

.spine-msg__agent-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--spine-primary);
  margin-bottom: 3px;
  display: block;
}

/* ── Links inside bot messages (mailto, learn-more) ─────────────────────────
   Server-generated <a> tags from format_answer() and the support branch.     */
.spine-msg__bubble a,
.spine-msg__link {
  color: var(--spine-accent);
  text-decoration: underline;
  font-weight: 500;
  word-break: break-all;
}

.spine-msg--bot .spine-msg__bubble a:hover { color: var(--spine-accent-dark); }

/* User bubble links — white on gradient */
.spine-msg--user .spine-msg__bubble a { color: rgba(255,255,255,.9); }

/* System message */
.spine-msg--system {
  justify-content: center;
}

.spine-msg--system .spine-msg__bubble {
  background: transparent;
  color: var(--spine-gray-400);
  font-size: 11.5px;
  text-align: center;
  padding: 4px 8px;
  max-width: 90%;
}

/* ── Typing Indicator ──────────────────────────────────────────────────────── */
.spine-chat__typing {
  padding: 6px 14px 4px;
  display: flex;
  align-items: center;
  gap: 3px;
}

.spine-chat__typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--spine-gray-400);
  animation: spine-typing 1.2s ease infinite;
}

.spine-chat__typing span:nth-child(2) { animation-delay: .2s; }
.spine-chat__typing span:nth-child(3) { animation-delay: .4s; }

/* ── Branch-Select Panel ───────────────────────────────────────────────────── */
.spine-chat__branch-panel {
  padding: 10px 14px 14px;
  flex-shrink: 0;
  border-top: 1px solid var(--spine-gray-100);
}

.spine-chat__branch-heading {
  font-size: 12px;
  font-weight: 600;
  color: var(--spine-gray-400);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin: 0 0 10px;
}

.spine-chat__branch-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

/* ── Branch Button ─────────────────────────────────────────────────────────── */
.spine-chat__branch-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 12px 12px 10px;
  border-radius: 12px;
  border: 1.5px solid var(--spine-gray-200);
  background: var(--spine-gray-50);
  cursor: pointer;
  text-align: left;
  transition:
    border-color var(--spine-transition),
    background var(--spine-transition),
    transform var(--spine-transition),
    box-shadow var(--spine-transition);
  position: relative;
  overflow: hidden;
}

.spine-chat__branch-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--spine-accent), var(--spine-primary));
  opacity: 0;
  transition: opacity var(--spine-transition);
}

.spine-chat__branch-btn:hover {
  border-color: var(--spine-accent);
  background: #eff6ff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(29,78,216,.15);
}

.spine-chat__branch-btn:hover .spine-chat__branch-label,
.spine-chat__branch-btn:hover .spine-chat__branch-icon svg { color: var(--spine-accent); }

.spine-chat__branch-btn:focus-visible {
  outline: 3px solid var(--spine-accent);
  outline-offset: 2px;
}

/* Support branch — orange tint to differentiate */
.spine-chat__branch-btn--support {
  border-color: #fed7aa;
  background: #fff7ed;
}

.spine-chat__branch-btn--support:hover {
  border-color: #f97316;
  background: #fff7ed;
  box-shadow: 0 4px 12px rgba(249,115,22,.15);
}

.spine-chat__branch-btn--support:hover .spine-chat__branch-label,
.spine-chat__branch-btn--support:hover .spine-chat__branch-icon svg { color: #ea580c; }

/* Loading state while AJAX is in flight */
.spine-chat__branch-btn--loading {
  opacity: .6;
  cursor: wait;
  pointer-events: none;
}

.spine-chat__branch-btn--loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,.4);
  animation: spine-shimmer 1s linear infinite;
}

/* Branch icon */
.spine-chat__branch-icon {
  display: flex;
  align-items: center;
  margin-bottom: 2px;
}

.spine-chat__branch-icon svg {
  width: 20px;
  height: 20px;
  color: var(--spine-gray-600);
  transition: color var(--spine-transition);
}

/* Branch label */
.spine-chat__branch-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--spine-gray-800);
  line-height: 1.2;
  transition: color var(--spine-transition);
}

/* Branch description */
.spine-chat__branch-desc {
  font-size: 11px;
  color: var(--spine-gray-400);
  line-height: 1.4;
  display: block;
}

/* ── Quick Replies ─────────────────────────────────────────────────────────── */
.spine-chat__quick-replies {
  padding: 6px 14px 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.spine-quick-reply {
  padding: 6px 13px;
  border-radius: 20px;
  border: 1.5px solid var(--spine-accent);
  background: transparent;
  color: var(--spine-accent);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition:
    background var(--spine-transition),
    color var(--spine-transition);
  white-space: nowrap;
  font-family: var(--spine-font);
}

.spine-quick-reply:hover {
  background: var(--spine-accent);
  color: #fff;
}

/* ── Alternatives Panel ────────────────────────────────────────────────────── */
.spine-chat__alternatives {
  padding: 6px 14px 10px;
}

.spine-alt-title {
  font-size: 12px;
  color: var(--spine-gray-400);
  margin-bottom: 8px;
  display: block;
}

.spine-alt-item {
  width: 100%;
  text-align: left;
  padding: 10px 13px;
  border-radius: 10px;
  border: 1.5px solid var(--spine-gray-200);
  background: var(--spine-gray-50);
  cursor: pointer;
  margin-bottom: 6px;
  transition: border-color var(--spine-transition), background var(--spine-transition);
  display: block;
  font-family: var(--spine-font);
}

.spine-alt-item:hover {
  border-color: var(--spine-accent);
  background: #eff6ff;
}

.spine-alt-item--agent {
  border-color: var(--spine-gray-200);
  color: var(--spine-accent);
  font-weight: 600;
  font-size: 13px;
}

.spine-alt-item__label {
  font-weight: 600;
  font-size: 13px;
  color: var(--spine-gray-800);
  display: block;
}

.spine-alt-item__preview {
  font-size: 12px;
  color: var(--spine-gray-400);
  margin-top: 2px;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Agent / Lead Offer (inline CTA row) ──────────────────────────────────── */
.spine-chat__agent-offer {
  display: flex;
  gap: 8px;
  padding: 4px 0 2px;
  flex-wrap: wrap;
  animation: spine-msg-in .25s cubic-bezier(.4,0,.2,1);
}

/* ── Lead Form ─────────────────────────────────────────────────────────────── */
.spine-chat__lead-form {
  padding: 12px 14px 4px;
  border-top: 1px solid var(--spine-gray-100);
}

.spine-chat__lead-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--spine-gray-800);
  margin: 0 0 4px;
}

.spine-chat__lead-sub {
  font-size: 12px;
  color: var(--spine-gray-400);
  margin: 0 0 12px;
}

.spine-chat__field {
  margin-bottom: 9px;
}

.spine-chat__field label {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--spine-gray-600);
  margin-bottom: 4px;
}

.spine-chat__field input,
.spine-chat__field textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1.5px solid var(--spine-gray-200);
  border-radius: 8px;
  font-size: 13px;
  font-family: var(--spine-font);
  color: var(--spine-gray-800);
  background: var(--spine-white);
  transition: border-color var(--spine-transition), box-shadow var(--spine-transition);
  box-sizing: border-box;
  resize: none;
  outline: none;
}

.spine-chat__field input:focus,
.spine-chat__field textarea:focus {
  border-color: var(--spine-accent);
  box-shadow: 0 0 0 3px rgba(29,78,216,.12);
}

.spine-chat__field-error {
  display: block;
  font-size: 11px;
  color: #ef4444;
  margin-top: 3px;
}

.spine-chat__lead-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.spine-chat__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition:
    background var(--spine-transition),
    transform var(--spine-transition),
    box-shadow var(--spine-transition);
  text-decoration: none;
  outline: none;
  font-family: var(--spine-font);
}

.spine-chat__btn--primary {
  background: linear-gradient(135deg, var(--spine-accent), var(--spine-primary));
  color: #fff;
  box-shadow: 0 2px 8px rgba(29,78,216,.3);
  flex: 1;
  justify-content: center;
}

.spine-chat__btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(29,78,216,.4);
}

.spine-chat__btn--secondary {
  background: var(--spine-gray-50);
  color: var(--spine-gray-600);
  border: 1.5px solid var(--spine-gray-200);
  flex: 1;
  justify-content: center;
}

.spine-chat__btn--secondary:hover {
  background: var(--spine-gray-100);
}

/* Small button variant — used in the inline agent/lead offer row */
.spine-chat__btn--sm {
  padding: 7px 12px;
  font-size: 12.5px;
  border-radius: 8px;
  flex: unset;
}

.spine-chat__btn svg { width: 14px; height: 14px; }

/* ── Input Area ────────────────────────────────────────────────────────────── */
.spine-chat__input-area {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--spine-gray-100);
  background: var(--spine-white);
  flex-shrink: 0;
  transition: background var(--spine-transition);
}

.spine-chat__input {
  flex: 1;
  border: 1.5px solid var(--spine-gray-200);
  border-radius: 12px;
  padding: 9px 13px;
  font-size: 13.5px;
  font-family: var(--spine-font);
  color: var(--spine-gray-800);
  background: var(--spine-gray-50);
  resize: none;
  outline: none;
  max-height: 100px;
  overflow-y: auto;
  transition: border-color var(--spine-transition), box-shadow var(--spine-transition);
  line-height: 1.5;
}

.spine-chat__input::placeholder { color: var(--spine-gray-400); }

.spine-chat__input:focus {
  border-color: var(--spine-accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(29,78,216,.1);
}

/* Locked state — before a branch is selected */
.spine-chat__input-area--locked {
  background: var(--spine-gray-50);
}

.spine-chat__input-area--locked .spine-chat__input {
  background: var(--spine-gray-100);
  border-color: var(--spine-gray-200);
  cursor: not-allowed;
  color: var(--spine-gray-400);
}

.spine-chat__input-area--locked .spine-chat__input::placeholder { color: var(--spine-gray-400); }
.spine-chat__input-area--locked .spine-chat__input:focus { border-color: var(--spine-gray-200); box-shadow: none; }

/* Frozen state — support branch or session closed; visually distinct & permanent */
.spine-chat__input-area--frozen {
  background: #f9fafb;
  border-top: 1px solid #f1f5f9;
  opacity: .7;
}

.spine-chat__input-area--frozen .spine-chat__input {
  background: transparent;
  border-color: transparent;
  cursor: default;
  font-style: italic;
  color: var(--spine-gray-400);
}

.spine-chat__input-area--frozen .spine-chat__input::placeholder { color: var(--spine-gray-400); font-style: italic; }
.spine-chat__input-area--frozen .spine-chat__input:focus { border-color: transparent; box-shadow: none; background: transparent; }

.spine-chat__input-area--frozen .spine-chat__send-btn {
  opacity: .25;
  cursor: not-allowed;
  pointer-events: none;
}

/* Send button */
.spine-chat__send-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, var(--spine-accent), var(--spine-primary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--spine-transition), box-shadow var(--spine-transition), opacity var(--spine-transition);
  flex-shrink: 0;
  outline: none;
}

.spine-chat__send-btn:hover:not(:disabled) {
  transform: scale(1.08);
  box-shadow: 0 4px 14px rgba(29,78,216,.4);
}

.spine-chat__send-btn:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.spine-chat__send-btn svg { width: 18px; height: 18px; }

/* ── Footer ────────────────────────────────────────────────────────────────── */
.spine-chat__footer {
  text-align: center;
  padding: 6px 0 8px;
  font-size: 10.5px;
  color: var(--spine-gray-400);
  flex-shrink: 0;
  border-top: 1px solid var(--spine-gray-100);
}

.spine-chat__footer a {
  color: var(--spine-accent);
  text-decoration: none;
}

/* ── Animations ────────────────────────────────────────────────────────────── */
@keyframes spine-pulse-ring {
  0%,100% { box-shadow: var(--spine-shadow-btn), 0 0 0 0 rgba(29,78,216,.4); }
  50%      { box-shadow: var(--spine-shadow-btn), 0 0 0 12px rgba(29,78,216,0); }
}

@keyframes spine-status-pulse {
  0%,100% { box-shadow: 0 0 0 2px rgba(74,222,128,.3); }
  50%      { box-shadow: 0 0 0 5px rgba(74,222,128,0); }
}

@keyframes spine-status-pulse-orange {
  0%,100% { box-shadow: 0 0 0 2px rgba(251,146,60,.3); }
  50%      { box-shadow: 0 0 0 5px rgba(251,146,60,0); }
}

@keyframes spine-typing {
  0%,60%,100% { transform: translateY(0); }
  30%          { transform: translateY(-6px); }
}

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

@keyframes spine-bounce {
  0%  { transform: scale(.4); }
  70% { transform: scale(1.15); }
  100%{ transform: scale(1); }
}

@keyframes spine-shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  :root {
    --spine-w:      100vw;
    --spine-h:      90vh;
    --spine-offset: 0px;
    --spine-radius: 0px;
  }

  .spine-chat { right: 0; bottom: 0; }
  .spine-chat--bottom-left { left: 0; right: 0; }

  .spine-chat__launcher {
    position: fixed;
    bottom: 20px;
    right: 20px;
  }

  .spine-chat--bottom-left .spine-chat__launcher {
    right: unset;
    left: 20px;
  }

  .spine-chat__window {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    width: 100vw;
    max-height: 90vh;
    border-radius: 20px 20px 0 0;
    transform: translateY(100%);
    transform-origin: bottom center;
  }

  .spine-chat--open .spine-chat__window {
    transform: translateY(0);
  }

  /* Branch buttons — single column on small screens */
  .spine-chat__branch-buttons {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 481px) and (max-width: 768px) {
  :root { --spine-w: 340px; }
}