.uh-chat{position:fixed;right:18px;bottom:18px;z-index:99999;font-family:system-ui,-apple-system,Segoe UI,sans-serif}.uh-chat-btn{border:0;border-radius:999px;padding:14px 18px;background:linear-gradient(135deg,#0ea5e9,#2563eb,#7c3aed);color:#fff;font-weight:800;box-shadow:0 12px 35px rgba(2,8,23,.35);cursor:pointer}.uh-chat-btn span{margin-left:6px}.uh-chat-panel{display:none;width:min(360px,calc(100vw - 28px));height:520px;max-height:calc(100vh - 100px);background:#fff;border:1px solid #dbeafe;border-radius:22px;box-shadow:0 20px 70px rgba(2,8,23,.35);overflow:hidden;margin-bottom:12px}.uh-chat.open .uh-chat-panel{display:flex;flex-direction:column}.uh-chat.open .uh-chat-btn{display:none}.uh-chat-panel header{display:flex;align-items:center;justify-content:space-between;padding:16px;background:linear-gradient(135deg,#0f172a,#1d4ed8);color:#fff}.uh-chat-panel header small{display:block;color:#bfdbfe;font-size:12px}.uh-chat-close{border:0;background:rgba(255,255,255,.16);color:#fff;width:34px;height:34px;border-radius:50%;font-size:22px;cursor:pointer}.uh-chat-body{flex:1;padding:14px;overflow:auto;background:#f8fafc}.uh-msg{max-width:86%;padding:10px 12px;border-radius:16px;margin:8px 0;line-height:1.35;font-size:14px;white-space:pre-wrap}.uh-msg.visitor{margin-left:auto;background:#2563eb;color:#fff;border-bottom-right-radius:4px}.uh-msg.admin{background:#e0f2fe;color:#082f49;border-bottom-left-radius:4px}.uh-msg.system{background:#fff7ed;color:#7c2d12;border:1px solid #fed7aa;font-size:13px}.uh-chat-form{display:flex;gap:8px;padding:12px;border-top:1px solid #e5e7eb}.uh-chat-form input{flex:1;border:1px solid #cbd5e1;border-radius:999px;padding:12px 14px}.uh-chat-form button{border:0;border-radius:999px;padding:0 15px;background:#16a34a;color:#fff;font-weight:800}.uh-chat-foot{display:block;padding:0 14px 12px;color:#64748b;font-size:11px}@media(max-width:520px){.uh-chat{right:10px;bottom:10px}.uh-chat-panel{height:70vh}}