:root{--bg:#fff;--ink:#161616;--line:#e6e6e6;--muted:#777}*{box-sizing:border-box}body{margin:0;color:var(--ink);font:14px Arial,sans-serif;background:var(--bg)}button,input,textarea{font:inherit}#gate{height:100vh;display:grid;place-content:center;gap:25px;text-align:center}#gate img{width:172px;margin:auto}#invite{display:flex;border:1px solid var(--line);border-radius:12px;padding:5px;width:min(360px,90vw)}#invite input{border:0;outline:0;padding:10px;flex:1}button{border:0;background:transparent;cursor:pointer;color:inherit}#invite button,#form button{background:#111;color:#fff;border-radius:8px;padding:10px 15px}#app{height:100vh;display:grid;grid-template-columns:260px 1fr}aside{border-right:1px solid var(--line);padding:12px;overflow:auto}#new{width:100%;border:1px solid var(--line);border-radius:8px;padding:11px;text-align:left}.history-item{padding:11px 8px;border-bottom:1px solid #f3f3f3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#444;cursor:pointer}main{min-width:0;display:grid;grid-template-rows:58px 1fr auto auto}header{border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 18px}header img{width:70px;height:auto}header label{flex:1;color:var(--muted)}#messages{overflow:auto;max-width:900px;width:100%;margin:auto;padding:32px 22px}.user,.bot{max-width:760px;padding:13px 0;line-height:1.55}.user{margin-left:auto;text-align:right}.bot{border-bottom:1px solid #f0f0f0}.cards{display:grid;gap:8px;margin-top:12px}.card{border:1px solid var(--line);padding:12px;border-radius:8px}.tag{float:right;color:var(--muted);font-size:11px}#form{border-top:1px solid var(--line);display:flex;gap:10px;padding:12px max(22px,calc((100vw - 900px)/2));background:#fff}textarea{resize:none;flex:1;border:1px solid var(--line);border-radius:10px;padding:11px;outline:0}footer{padding:10px 18px;color:var(--muted);display:flex;gap:14px;justify-content:center;font-size:12px}footer button{text-decoration:underline}@media(max-width:700px){#app{grid-template-columns:1fr}aside{position:fixed;width:260px;height:100%;background:#fff;z-index:2;display:none}aside.open{display:block}#messages{padding:22px 14px}#form{padding:12px}}
#inviteError{margin:-18px 0 0;color:#b42318;min-height:18px;font-size:12px}#invite button:disabled{opacity:.55;cursor:wait}