/* chat widget */
#cb-fab{position:fixed;right:24px;bottom:24px;width:60px;height:60px;border-radius:50%;border:0;background:var(--brand);color:#fff;font-size:26px;cursor:pointer;box-shadow:0 6px 20px rgba(0,0,0,.25)}
 #cb-panel{position:fixed;right:24px;bottom:96px;width:360px;max-width:calc(100vw - 32px);height:480px;max-height:70vh;background:#fff;border-radius:14px;box-shadow:0 10px 40px rgba(0,0,0,.25);display:none;flex-direction:column;overflow:hidden}
 #cb-panel.open{display:flex}
 #cb-head{background:var(--brand);color:#fff;padding:.9rem 1rem;font-weight:600}
 #cb-log{flex:1;overflow:auto;padding:1rem;background:#fafbfd}
 .msg{max-width:85%;padding:.5rem .8rem;border-radius:12px;margin:.4rem 0;white-space:pre-wrap}
 .user{background:var(--brand);color:#fff;margin-left:auto} .bot{background:#e9eef7}
 #cb-form{display:flex;border-top:1px solid #e3e8f0} #cb-text{flex:1;border:0;padding:.8rem;font-size:1rem;outline:none}
 #cb-form button{border:0;background:none;color:var(--brand);font-weight:600;padding:0 1rem;cursor:pointer}