:root{--ink:#1c1c1e;--muted:#8a8a8e;--line:#ececec;--bg:#fff;--rail:#f7f7f8;--fill:#f1f1f2;--accent:#1c1c1e;--radius:12px}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,Roboto,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}button,input,textarea{font-family:inherit;font-size:inherit}.screen.center{display:flex;align-items:center;justify-content:center;height:100dvh}.card-pane{width:100%;max-width:340px;padding:28px;text-align:center}.logo{width:44px;height:44px;border-radius:11px;margin:0 auto 20px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px}.logo,h1{font-weight:600}h1{font-size:20px;line-height:1.3;margin:0 0 8px}.sub{color:var(--muted);margin:0 0 18px}.field{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;outline:none;background:#fff;margin-bottom:10px}.field:focus{border-color:var(--ink)}.btn{width:100%;padding:11px 13px;border:none;border-radius:10px;background:var(--accent);color:#fff;font-weight:500;cursor:pointer}.btn:hover{opacity:.9}.btn:disabled{opacity:.5;cursor:default}.err{color:#c0392b;margin:0 0 12px;text-align:left;font-size:13px}.app-shell{display:flex;height:100dvh}.rail{width:248px;flex:0 0 248px;background:var(--rail);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:14px 10px}.rail-brand{gap:9px;padding:6px 8px 14px}.rail-brand,.rail-logo{display:flex;align-items:center;font-weight:600}.rail-logo{width:26px;height:26px;border-radius:8px;background:var(--accent);color:#fff;justify-content:center;font-size:13px}.rail-nav{flex:1 1;overflow-y:auto;display:flex;flex-direction:column;gap:1px}.rail-label{font-size:12px;color:var(--muted);padding:14px 8px 6px}.rail-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:8px;color:var(--ink);text-decoration:none;cursor:pointer}.rail-item.is-active,.rail-item:hover{background:var(--fill)}.rail-item.is-active{font-weight:500}.rail-name{flex:1 1}.rail-soon{font-size:12px;color:var(--muted)}.rail-ext{color:var(--muted);font-size:13px}.rail-item.is-soon{color:var(--muted);cursor:default}.rail-item.is-soon:hover{background:none}.rail-foot{border-top:1px solid var(--line);padding-top:10px;margin-top:8px}.rail-user{gap:9px;padding:4px 8px 10px}.rail-avatar,.rail-user{display:flex;align-items:center}.rail-avatar{width:26px;height:26px;border-radius:50%;background:var(--fill);justify-content:center;font-weight:500;font-size:12px;flex:0 0 auto}.rail-email{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.rail-email,.rail-signout{color:var(--muted);font-size:13px}.rail-signout{width:100%;padding:8px;border:1px solid var(--line);background:transparent;border-radius:8px;cursor:pointer}.rail-signout:hover{border-color:var(--muted);color:var(--ink)}.app-main{flex:1 1;min-width:0;height:100dvh;overflow:hidden}.app-main,.screen{background:var(--bg)}.screen{display:flex;flex-direction:column;height:100%}.chat-head{display:flex;align-items:center;gap:10px;padding:13px 22px;border-bottom:1px solid var(--line)}.who{font-weight:500}.head-actions{margin-left:auto;display:flex;gap:16px;align-items:center}.exit{color:var(--muted);font-size:13px;cursor:pointer;background:none;border:none;padding:0}.exit:hover{color:var(--ink)}.thread{flex:1 1;overflow-y:auto}.thread-inner{max-width:720px;margin:0 auto;padding:24px 22px 12px;display:flex;flex-direction:column;gap:20px}.remo-msg{white-space:pre-wrap}.md .h{display:block;font-weight:600;margin:14px 0 4px}.md .h:first-child{margin-top:0}.me{align-self:flex-end;max-width:80%;background:var(--fill);border-radius:14px;padding:10px 14px;white-space:pre-wrap}.typing{display:flex;gap:4px;padding:4px 0}.typing span{width:6px;height:6px;border-radius:50%;background:#cfcfd2;animation:blink 1.2s infinite}.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}@keyframes blink{0%,60%,to{opacity:.3}30%{opacity:1}}.composer{padding:10px 22px 18px}.composer-box{max-width:720px;margin:0 auto;display:flex;align-items:flex-end;gap:8px;border:1px solid var(--line);border-radius:16px;padding:8px 8px 8px 14px;background:#fff}.composer-box:focus-within{border-color:var(--muted)}.composer textarea{flex:1 1;resize:none;border:none;outline:none;background:none;padding:6px 0;max-height:140px;line-height:1.5}.sendbtn{width:34px;height:34px;border-radius:9px;border:none;background:var(--accent);color:#fff;font-size:16px;cursor:pointer;flex:0 0 auto}.sendbtn:hover{opacity:.9}.sendbtn:disabled{opacity:.35;cursor:default}.rail-toggle{display:none;position:fixed;top:11px;left:11px;z-index:30;width:38px;height:38px;border-radius:9px;border:1px solid var(--line);background:#fff;font-size:17px;cursor:pointer}.rail-scrim{display:none}@media (max-width:760px){.rail-toggle{display:block}.rail{position:fixed;top:0;left:0;bottom:0;z-index:40;transform:translateX(-100%);transition:transform .2s ease}.rail.is-open{transform:translateX(0)}.rail-scrim{display:block;position:fixed;inset:0;z-index:35;background:rgba(0,0,0,.3)}.app-main{width:100%}.chat-head{padding-left:58px}}