:root{--u7bca-primary:#6366f1;--u7bca-bg:#fff;--u7bca-bg-secondary:#f8fafc;--u7bca-text:#1e293b;--u7bca-text-muted:#64748b;--u7bca-border:#e2e8f0;--u7bca-radius:16px;--u7bca-shadow:0 8px 40px rgba(0,0,0,.15);--u7bca-msg-user:var(--u7bca-primary);--u7bca-msg-bot:#f1f5f9}
.u7bca-chat-container{position:fixed;z-index:999999;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:14px;line-height:1.5}
.u7bca-bottom-right{bottom:24px;right:24px}.u7bca-bottom-left{bottom:24px;left:24px}
.u7bca-fab{width:60px;height:60px;border-radius:50%;border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(0,0,0,.2);transition:transform .2s,box-shadow .2s;position:relative}
.u7bca-fab:hover{transform:scale(1.08);box-shadow:0 6px 28px rgba(0,0,0,.25)}.u7bca-fab:active{transform:scale(.96)}
.u7bca-fab::after{content:"";position:absolute;top:-2px;right:-2px;width:16px;height:16px;background:#ef4444;border-radius:50%;border:2px solid #fff;animation:u7bca-pulse 2s infinite}
.u7bca-fab.u7bca-open::after{display:none}
@keyframes u7bca-pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.2);opacity:.7}}
.u7bca-chat-window{display:none;position:absolute;bottom:76px;width:380px;max-height:560px;background:var(--u7bca-bg);border-radius:var(--u7bca-radius);box-shadow:var(--u7bca-shadow);overflow:hidden;flex-direction:column;animation:u7bca-slide-up .3s ease}
.u7bca-bottom-right .u7bca-chat-window{right:0}.u7bca-bottom-left .u7bca-chat-window{left:0}
.u7bca-chat-window.u7bca-visible{display:flex}
@keyframes u7bca-slide-up{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.u7bca-chat-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;color:#fff;flex-shrink:0}
.u7bca-header-info{display:flex;align-items:center;gap:12px}
.u7bca-avatar{width:40px;height:40px;background:rgba(255,255,255,.2);border-radius:50%;display:flex;align-items:center;justify-content:center}
.u7bca-bot-name{font-weight:600;font-size:15px}.u7bca-bot-status{font-size:12px;opacity:.85}
.u7bca-close-btn{background:none;border:none;color:#fff;cursor:pointer;padding:4px;border-radius:6px;transition:background .15s}.u7bca-close-btn:hover{background:rgba(255,255,255,.15)}
.u7bca-chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:12px;min-height:280px;max-height:360px;background:var(--u7bca-bg-secondary)}
.u7bca-chat-messages::-webkit-scrollbar{width:4px}.u7bca-chat-messages::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}
.u7bca-message{max-width:82%;padding:10px 16px;border-radius:16px;word-wrap:break-word;animation:u7bca-fade-in .2s ease}
@keyframes u7bca-fade-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.u7bca-message-bot{align-self:flex-start;background:var(--u7bca-bg);color:var(--u7bca-text);border:1px solid var(--u7bca-border);border-bottom-left-radius:4px}
.u7bca-message-user{align-self:flex-end;background:var(--u7bca-msg-user);color:#fff;border-bottom-right-radius:4px}
.u7bca-message-bot .u7bca-checkout-link{display:inline-block;margin-top:10px;padding:12px 24px;background:var(--u7bca-primary);color:#fff!important;text-decoration:none;border-radius:10px;font-weight:600;font-size:14px;transition:opacity .15s;text-align:center}
.u7bca-message-bot .u7bca-checkout-link:hover{opacity:.9}
.u7bca-typing-indicator{padding:0 20px 12px;display:flex;gap:4px;align-items:center}
.u7bca-typing-indicator span{width:8px;height:8px;border-radius:50%;background:#94a3b8;animation:u7bca-bounce 1.2s infinite}
.u7bca-typing-indicator span:nth-child(2){animation-delay:.15s}.u7bca-typing-indicator span:nth-child(3){animation-delay:.3s}
@keyframes u7bca-bounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-6px)}}
.u7bca-chat-input-wrap{display:flex;align-items:center;padding:12px 16px;border-top:1px solid var(--u7bca-border);background:var(--u7bca-bg);flex-shrink:0}
.u7bca-chat-input{flex:1;border:1px solid var(--u7bca-border);border-radius:24px;padding:10px 18px;font-size:14px;outline:none;transition:border-color .15s;font-family:inherit}.u7bca-chat-input:focus{border-color:var(--u7bca-primary)}
.u7bca-send-btn{width:40px;height:40px;border-radius:50%;border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;margin-left:8px;transition:opacity .15s;flex-shrink:0}.u7bca-send-btn:hover{opacity:.85}
.u7bca-buy-button-wrap{margin:20px 0}
.u7bca-open-chat-btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;font-size:16px;font-weight:600;color:#fff;border:none;border-radius:12px;cursor:pointer;transition:opacity .15s,transform .1s;font-family:inherit}.u7bca-open-chat-btn:hover{opacity:.9;transform:translateY(-1px)}.u7bca-open-chat-btn:active{transform:translateY(0)}
.u7bca-buy-subtext{font-size:13px;color:var(--u7bca-text-muted);margin-top:6px}
.u7bca-archive-chat-btn{display:inline-flex!important;align-items:center;justify-content:center;font-weight:600!important;border-radius:8px!important;padding:8px 16px!important;font-size:13px!important;transition:opacity .15s!important}.u7bca-archive-chat-btn:hover{opacity:.85;color:#fff!important}
@media(max-width:480px){.u7bca-chat-window{width:calc(100vw - 32px);max-height:calc(100vh - 120px);bottom:72px}.u7bca-bottom-right .u7bca-chat-window,.u7bca-bottom-left .u7bca-chat-window{right:0;left:0;margin:0 auto}.u7bca-fab{width:54px;height:54px}}