.ai-chat-btn{position:fixed;bottom:20px;right:20px;z-index:9999;width:56px;height:56px;border-radius:50%;background:var(--theme-base-color,#CB2128);border:none;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,.2);display:flex;align-items:center;justify-content:center;transition:transform .2s,box-shadow .2s}
.ai-chat-btn:hover{transform:scale(1.08);box-shadow:0 6px 20px rgba(0,0,0,.25)}
.ai-chat-btn svg{width:28px;height:28px;fill:#fff}
.ai-chat-btn--close svg{width:20px;height:20px}

.ai-chat-window{position:fixed;bottom:88px;right:20px;z-index:9998;width:380px;max-width:calc(100vw - 24px);height:520px;max-height:calc(100vh - 120px);background:var(--card_bg_black,#fff);border-radius:12px;border:1px solid var(--stroke_black,#ededed);box-shadow:0 8px 40px rgba(0,0,0,.15);display:flex;flex-direction:column;overflow:hidden;opacity:0;transform:translateY(20px) scale(.95);pointer-events:none;transition:opacity .25s,transform .25s}
.ai-chat-window.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}

.ai-chat-header{background:var(--theme-base-color,#CB2128);color:#fff;padding:16px 20px;display:flex;align-items:center;gap:12px;flex-shrink:0}
.ai-chat-header__avatar{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.ai-chat-header__info{flex:1;min-width:0}
.ai-chat-header__name{font-weight:600;font-size:15px}
.ai-chat-header__status{font-size:12px;opacity:.85}

.ai-chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;scroll-behavior:smooth;background:var(--lite_bg_black,#fafafa)}
.ai-chat-messages::-webkit-scrollbar{width:4px}
.ai-chat-messages::-webkit-scrollbar-thumb{background:var(--gray_bg_black,#ccc);border-radius:4px}

.ai-chat-msg{max-width:85%;padding:10px 14px;border-radius:12px;font-size:14px;line-height:1.5;word-break:break-word}
.ai-chat-msg a{color:var(--theme-base-color,#CB2128);text-decoration:underline}
.ai-chat-msg--user{align-self:flex-end;background:var(--theme-base-color,#CB2128);color:#fff;border-bottom-right-radius:4px}
.ai-chat-msg--user a{color:rgba(255,255,255,.85)}
.ai-chat-msg--bot{align-self:flex-start;background:var(--card_bg_black,#fff);color:var(--white_text_black,#222);border:1px solid var(--stroke_black,#ededed);border-bottom-left-radius:4px}
.ai-chat-msg--typing{align-self:flex-start;background:var(--card_bg_black,#fff);border:1px solid var(--stroke_black,#ededed);padding:12px 18px;border-radius:12px;border-bottom-left-radius:4px}
.ai-chat-msg--typing span{display:inline-block;width:8px;height:8px;background:var(--basic_text_black,#555);border-radius:50%;margin:0 2px;animation:ai-typing .6s infinite alternate}
.ai-chat-msg--typing span:nth-child(2){animation-delay:.2s}
.ai-chat-msg--typing span:nth-child(3){animation-delay:.4s}
@keyframes ai-typing{to{opacity:.3;transform:translateY(-4px)}}

.ai-chat-form{display:flex;padding:12px;gap:8px;border-top:1px solid var(--stroke_black,#ededed);flex-shrink:0;background:var(--card_bg_black,#fff)}
.ai-chat-input{flex:1;border:1px solid var(--input_border_color,#dadada);border-radius:8px;padding:10px 16px;font-size:14px;outline:none;resize:none;max-height:80px;line-height:1.4;font-family:inherit;background:var(--input_bg_color,#fff);color:var(--input_color,#222)}
.ai-chat-input:focus{border-color:var(--theme-base-color,#CB2128)}
.ai-chat-input::placeholder{color:var(--lite_basic_text_black,#666)}
.ai-chat-send{width:40px;height:40px;border-radius:8px;background:var(--theme-base-color,#CB2128);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s,opacity .2s;align-self:flex-end}
.ai-chat-send:hover{opacity:.85}
.ai-chat-send:disabled{background:var(--gray_bg_black,#ccc);cursor:not-allowed;opacity:1}
.ai-chat-send svg{width:18px;height:18px;fill:#fff}

.ai-chat-welcome{text-align:center;padding:20px 16px}
.ai-chat-welcome__icon{font-size:40px;margin-bottom:8px}
.ai-chat-welcome__title{font-weight:600;font-size:16px;color:var(--white_text_black,#222);margin-bottom:4px}
.ai-chat-welcome__text{font-size:13px;color:var(--basic_text_black,#555);margin-bottom:16px}
.ai-chat-welcome__chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.ai-chat-welcome__chip{background:var(--darkgrey_bg_black,#f4f4f4);color:var(--white_text_black,#222);border:1px solid var(--stroke_black,#ededed);border-radius:8px;padding:8px 14px;font-size:13px;cursor:pointer;transition:background .2s,border-color .2s;font-family:inherit}
.ai-chat-welcome__chip:hover{border-color:var(--theme-base-color,#CB2128);color:var(--theme-base-color,#CB2128)}

.ai-chat-header__close{display:none;background:none;border:none;cursor:pointer;padding:8px;margin:-8px -8px -8px auto;flex-shrink:0}
.ai-chat-header__close svg{width:20px;height:20px;fill:#fff}

@media(max-width:480px){
  .ai-chat-window{bottom:0;right:0;width:100%;max-width:100%;height:100%;max-height:100%;border-radius:0}
  .ai-chat-btn.ai-chat-btn--hidden{display:none}
  .ai-chat-btn{bottom:12px;right:12px;width:52px;height:52px}
  .ai-chat-header__close{display:flex;align-items:center;justify-content:center}
}