:root{--green:#07c160;--green-dark:#06ad56;--rail:#2e2e2e;--list:#ededed;--chat:#f5f5f5;--mine:#95ec69;--text:#111;--muted:#888;color:var(--text);background:#111;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}button,input{font:inherit}button{cursor:pointer}.muted{color:var(--muted);font-size:13px}.error{color:#c0392b;padding:0 16px}.hint{color:var(--muted);font-size:12px}.primary{background:var(--green);color:#fff;border:0;border-radius:4px;padding:10px 16px}.primary:disabled{opacity:.6}.danger{color:#fff;background:#e64340;border:0;border-radius:4px;padding:10px 16px}.login{background:linear-gradient(#1a1a1a,#111);place-items:center;min-height:100%;display:grid}.login-card{background:#fff;border-radius:12px;width:min(420px,92vw);padding:32px 28px}.login-card h1{margin:0 0 8px}.stack{flex-direction:column;gap:10px;margin-top:20px;display:flex}.addr{word-break:break-all;color:#555;font-size:12px}.shell{background:var(--chat);grid-template-columns:64px 300px 1fr;height:100%;display:grid}.rail{background:var(--rail);flex-direction:column;align-items:center;gap:8px;padding-top:16px;display:flex}.rail button{color:#bbb;background:0 0;border:0;border-radius:8px;width:48px;height:48px}.rail button.on,.rail button:hover{color:#fff;background:#3f3f3f}.pane-list{background:var(--list);border-right:1px solid #ddd;flex-direction:column;min-width:0;display:flex}.pane-head{border-bottom:1px solid #ddd;justify-content:space-between;align-items:center;padding:14px 16px;display:flex}.conv-list{flex:1;margin:0;padding:0;list-style:none;overflow:auto}.conv-list button,.friend{text-align:left;background:0 0;border:0;align-items:center;gap:10px;width:100%;padding:12px 14px;display:flex}.conv-list button.on,.conv-list button:hover,.friend:hover{background:#d9d9d9}.avatar{color:#fff;background:#07c160;border-radius:4px;flex-shrink:0;place-items:center;width:40px;height:40px;display:grid}.meta{flex:1;min-width:0}.meta .row{justify-content:space-between;gap:8px;display:flex}.preview{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:12px;display:block;overflow:hidden}.badge{color:#fff;text-align:center;background:#fa5151;border-radius:10px;min-width:18px;padding:0 5px;font-size:11px;font-style:normal}.contacts,.me{flex-direction:column;gap:8px;padding:12px 16px;display:flex;overflow:auto}.contacts label,.me label,.invite-bar{flex-direction:column;gap:4px;font-size:13px;display:flex}.contacts input,.me input,.invite-bar input,.composer input{border:1px solid #ccc;border-radius:4px;padding:8px}.row-item{align-items:center;gap:8px;font-size:13px;display:flex}.row-item button{background:#fff;border:0;border-radius:4px;padding:4px 8px}.pane-chat{flex-direction:column;min-width:0;display:flex}.chat-head{background:#f7f7f7;border-bottom:1px solid #ddd;align-items:center;gap:12px;height:56px;padding:0 16px;display:flex}.back{background:0 0;border:0;display:none}.invite-bar{background:#fafafa;flex-direction:row;gap:8px;padding:8px 12px}.messages{flex-direction:column;flex:1;gap:10px;padding:16px;display:flex;overflow:auto}.more{color:#576b95;background:0 0;border:0;align-self:center}.bubble{background:#fff;border-radius:4px;align-self:flex-start;max-width:72%;padding:8px 10px;box-shadow:0 1px 1px #0000000f}.bubble.mine{background:var(--mine);align-self:flex-end}.bubble cite{color:#576b95;margin-bottom:4px;font-size:12px;font-style:normal;display:block}.bubble p{white-space:pre-wrap;word-break:break-word;margin:0}.bubble img{border-radius:4px;max-width:220px;display:block}.bubble time{color:#999;margin-top:4px;font-size:11px;display:block}.bubble blockquote{background:#0000000d;margin:0 0 6px;padding:6px;font-size:12px}.composer{background:#f7f7f7;border-top:1px solid #ddd;gap:8px;padding:10px;display:flex}.composer input{flex:1}.empty{color:var(--muted);margin:auto}@media (width<=800px){.shell{grid-template-columns:52px 1fr}.pane-chat,.shell.has-chat .pane-list{display:none}.shell.has-chat .pane-chat{grid-column:2;display:flex}.back{display:inline}}