.sanai-chat-widget{position:fixed;right:18px;bottom:18px;z-index:2147483647 !important;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial}
.sanai-chat-popup{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));width:360px;height:min(70vh,560px);max-height:calc(100vh - 120px);background:#fff;border-radius:16px;
  box-shadow:0 18px 40px rgba(2,6,23,.25);display:none;flex-direction:column;overflow:hidden;border:1px solid #e5e7eb}
@media (max-width: 480px){ .sanai-chat-popup{width:92vw; right:4vw; height:min(70vh,520px);} }
.sanai-chat-header{position:relative;display:flex;align-items:center;justify-content:center;background:#1e40af;color:#fff;padding:12px 14px}
.sanai-chat-title{font-weight:700}
/* Close button: nổi bật, dễ bấm */
.sanai-chat-header{ position: relative; }

.sanai-chat-close{
  position:absolute; right:-15px; top:2px;
  width:32px; height:32px; line-height:32px;
  border-radius:9999px;
  border:1px solid #e5e7eb; background:#ffffff; color:#1f2937;
  font-weight:700; font-size:18px;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 2px 6px rgba(0,0,0,.12);
  cursor:pointer;
  transition:transform .12s ease, box-shadow .12s ease, background .12s ease, color .12s ease;
}
.sanai-chat-close:hover{
  background:#ef4444; color:#fff;
  box-shadow:0 6px 16px rgba(239,68,68,.35);
  transform:scale(1.05);
}
.sanai-chat-close:focus-visible{
  outline:3px solid #60a5fa; outline-offset:2px;
}
.sanai-chat-messages{flex:1;padding:12px;overflow:auto;background:#f8fafc;scroll-behavior:smooth}
.sanai-chat-typing{display:flex;gap:4px;align-items:center;padding:6px 12px;background:#f8fafc;border-top:1px dashed #e5e7eb}
.sanai-chat-typing .dot{width:6px;height:6px;border-radius:50%;background:#64748b;display:inline-block;animation:sanai-bounce 1.2s infinite ease-in-out}
.sanai-chat-typing .dot:nth-child(2){animation-delay:.2s}.sanai-chat-typing .dot:nth-child(3){animation-delay:.4s}
@keyframes sanai-bounce{0%,80%,100%{transform:scale(0.8);opacity:.4}40%{transform:scale(1.2);opacity:1}}
.sanai-chat-inputwrap{display:flex;gap:8px;padding:10px;background:#fff;border-top:1px solid #eef2f7}
.sanai-chat-input{flex:1;border:2px solid #d1d5db;border-radius:10px;padding:10px}
.sanai-chat-send{background:#16a34a;color:#fff;border:none;border-radius:10px;padding:10px 14px;cursor:pointer}
.sanai-chat-footer{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:#fff;border-top:1px solid #eef2f7;font-size:12px;color:#475569}
.sanai-brand{opacity:.8}
.sanai-msg{margin:8px 0;max-width:84%;padding:10px 12px;border-radius:12px;font-size:14px;line-height:1.45;word-break:break-word}
.sanai-msg.user{margin-left:auto;background:#e0f2fe;border:1px solid #bae6fd}
.sanai-msg.assistant{margin-right:auto;background:#eef2ff;border:1px solid #e0e7ff}
.sanai-link{display:inline-block;margin-top:6px;padding:6px 10px;border-radius:10px;border:1px solid #c7d2fe;background:#e0e7ff;text-decoration:none;color:#1e40af;font-weight:600}
.sanai-products{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:8px}
.sanai-card{border:1px solid #e5e7eb;border-radius:12px;overflow:hidden;background:#fff}
.sanai-card img{width:100%;height:110px;object-fit:cover;display:block}
.sanai-card .body{padding:8px}
.sanai-card .title{font-size:13px;font-weight:700;margin-bottom:4px}
.sanai-card .price{font-size:13px;color:#0f766e;margin-bottom:6px}
.sanai-card .actions{display:flex;gap:6px}
.sanai-card .btn{flex:1;text-align:center;padding:6px 8px;border-radius:8px;text-decoration:none;font-size:12px}
.sanai-card .btn.view{border:1px solid #93c5fd;background:#dbeafe;color:#1e3a8a}
.sanai-card .btn.buy{border:1px solid #86efac;background:#dcfce7;color:#14532d}
@media (max-width: 480px){
  .sanai-chat-popup{
    left: 0;               /* full-width */
    right: 0;
    width: 100vw;
    bottom: 0 !important;  /* dán sát đáy, không nhảy */
    height: 65vh;          /* đủ thoáng cho bàn phím */
    max-height: 65vh;
    border-radius: 16px 16px 0 0;
  }
}

/* khóa cuộn khi mở popup */
html.sanai-no-scroll,
html.sanai-no-scroll body{
  overflow: hidden !important;
  height: 100% !important;
}
/* Kích thước bong bóng (có thể đổi 64px) */
:root{ --sanai-bubble-size: 64px; }
@media (max-width:480px){ :root{ --sanai-bubble-size: 56px; } }

/* Bong bóng tròn như Messenger */
.sanai-chat-bubble{
  width: var(--sanai-bubble-size);
  height: var(--sanai-bubble-size);
  aspect-ratio: 1 / 1;
  border: 0; padding: 0;
  border-radius: 50%;
  overflow: hidden;              /* cho ảnh tràn kín */
  background: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 24px rgba(2,12,27,.18), 0 2px 8px rgba(2,12,27,.12);
  cursor: pointer;
}

/* Ảnh logo: tràn kín, không méo */
.sanai-chat-bubble img{
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;            /* cắt cho vuông, tránh méo */
  border-radius: 50%;
}