#ai-chatbot{position:fixed;bottom:20px;right:20px;z-index:9999;font-family:system-ui,sans-serif}
#ai-toggle{background:#111;color:#fff;border:none;border-radius:50%;width:56px;height:56px;font-size:20px;cursor:pointer}
#ai-panel{display:none;width:320px;height:420px;background:#fff;border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,.2);overflow:hidden;margin-bottom:10px}
#ai-header{background:#111;color:#fff;padding:12px;font-weight:bold}
#ai-messages{height:300px;overflow-y:auto;padding:10px;font-size:14px}
#ai-form{display:flex;border-top:1px solid #ddd}
#ai-input{flex:1;border:none;padding:10px}
#ai-form button{background:#111;color:#fff;border:none;padding:0 16px}