.lena-ai-root{
  position:fixed;
  right:22px;
  bottom:22px;
  z-index:70;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;
}
.lena-ai-fab{
  display:inline-flex;align-items:center;gap:12px;
  border:0;cursor:pointer;
  padding:12px 16px 12px 12px;
  border-radius:999px;
  color:#fff;
  background:linear-gradient(135deg,#0f172a,#2563eb 58%,#06b6d4);
  box-shadow:0 18px 40px rgba(15,23,42,.28),0 0 0 1px rgba(255,255,255,.12) inset;
  transition:transform .18s ease, box-shadow .18s ease;
}
.lena-ai-fab:hover{transform:translateY(-2px);box-shadow:0 22px 44px rgba(15,23,42,.34),0 0 0 1px rgba(255,255,255,.12) inset}
.lena-ai-avatar{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  background:radial-gradient(circle at 30% 30%,#7dd3fc,#2563eb 55%,#0f172a);
  box-shadow:0 0 0 4px rgba(255,255,255,.14);
  position:relative;
}
.lena-ai-avatar::after{
  content:"";position:absolute;inset:-5px;border-radius:50%;border:1px solid rgba(125,211,252,.42);
  animation:lenaPulse 3.8s ease-in-out infinite;
}
@keyframes lenaPulse{0%,100%{transform:scale(1);opacity:.55}50%{transform:scale(1.12);opacity:.12}}
.lena-ai-fab-label strong{display:block;font-size:.97rem;line-height:1}
.lena-ai-fab-label span{display:block;font-size:.72rem;opacity:.82;margin-top:4px}
.lena-ai-panel{
  position:absolute;right:0;bottom:70px;width:min(430px,calc(100vw - 28px));
  max-height:min(78vh,760px);display:none;flex-direction:column;overflow:hidden;
  background:rgba(255,255,255,.96);backdrop-filter:blur(16px);
  border:1px solid rgba(15,23,42,.08);border-radius:28px;
  box-shadow:0 26px 70px rgba(15,23,42,.22);
}
.lena-ai-root.is-open .lena-ai-panel{display:flex;animation:lenaPanelIn .22s ease-out}
@keyframes lenaPanelIn{from{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}
.lena-ai-head{padding:18px 18px 14px;display:flex;align-items:flex-start;justify-content:space-between;gap:14px;background:linear-gradient(135deg,#eff6ff,#f8fbff 56%,#eefcfb);border-bottom:1px solid rgba(15,23,42,.06)}
.lena-ai-head-left{display:flex;gap:12px;align-items:flex-start}
.lena-ai-head-copy h3{margin:0;font-size:1.05rem;color:#0f172a}
.lena-ai-head-copy p{margin:6px 0 0;font-size:.82rem;line-height:1.5;color:#5f6f86;max-width:27ch}
.lena-ai-head-actions{display:flex;gap:8px;align-items:center}
.lena-ai-icon-btn{border:1px solid rgba(15,23,42,.08);background:#fff;color:#0f172a;border-radius:12px;min-width:38px;height:38px;display:grid;place-items:center;cursor:pointer}
.lena-ai-quick{
  padding:12px 16px 4px;display:flex;gap:8px;flex-wrap:wrap;background:#fff;
}
.lena-ai-chip{
  border:1px solid rgba(37,99,235,.12);background:rgba(37,99,235,.06);color:#1d4ed8;
  border-radius:999px;padding:9px 12px;font-size:.78rem;font-weight:800;cursor:pointer;
}
.lena-ai-context{padding:0 16px 12px;font-size:.76rem;color:#64748b;line-height:1.5}
.lena-ai-context strong{color:#334155}
.lena-ai-messages{padding:8px 16px 12px;overflow:auto;display:grid;gap:10px;background:linear-gradient(180deg,#fff,#fbfdff)}
.lena-ai-msg{padding:12px 14px;border-radius:18px;line-height:1.58;font-size:.9rem;box-shadow:0 10px 24px rgba(15,23,42,.05);max-width:92%}
.lena-ai-msg strong{color:#0f172a}
.lena-ai-msg.assistant{background:#f8fbff;border:1px solid rgba(37,99,235,.10);color:#334155}
.lena-ai-msg.user{background:linear-gradient(135deg,#2563eb,#06b6d4);color:#fff;margin-left:auto}
.lena-ai-msg.typing{font-style:italic;color:#64748b;background:#fff;border:1px dashed rgba(15,23,42,.12)}
.lena-ai-form{padding:14px 16px 16px;border-top:1px solid rgba(15,23,42,.06);background:#fff}
.lena-ai-textarea{width:100%;min-height:92px;resize:vertical;border-radius:18px;border:1px solid rgba(15,23,42,.12);padding:14px 14px 12px;font:inherit;color:#0f172a;background:#fff}
.lena-ai-textarea:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 4px rgba(37,99,235,.10)}
.lena-ai-form-row{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-top:10px;flex-wrap:wrap}
.lena-ai-meta{font-size:.76rem;color:#64748b}
.lena-ai-actions{display:flex;gap:10px;flex-wrap:wrap}
.lena-ai-send,.lena-ai-ghost{border:0;border-radius:14px;min-height:44px;padding:0 16px;font-weight:800;cursor:pointer}
.lena-ai-send{background:linear-gradient(135deg,#2563eb,#06b6d4);color:#fff;box-shadow:0 14px 26px rgba(37,99,235,.18)}
.lena-ai-ghost{background:#eef6ff;color:#1d4ed8}
.lena-ai-status{padding:0 16px 14px;font-size:.76rem;color:#64748b;display:flex;gap:8px;align-items:center}
.lena-ai-status-dot{width:9px;height:9px;border-radius:50%;background:#cbd5e1}
.lena-ai-status-dot.is-live{background:#22c55e;box-shadow:0 0 0 6px rgba(34,197,94,.12)}
.lena-ai-root.is-speaking .lena-ai-avatar{animation:lenaSpeak 1.6s ease-in-out infinite}
@keyframes lenaSpeak{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}
@media (max-width:760px){
  .lena-ai-root{right:12px;left:12px;bottom:12px}
  .lena-ai-panel{width:100%;right:0;bottom:76px;max-height:72vh}
  .lena-ai-fab{width:100%;justify-content:center}
}