:root{--bg:#f4f6f9;--panel:#ffffff;--line:#e3e7ee;--ink:#111522;--muted:#5b6475;--accent:#2a5682;--accent-soft:#e8eff7;--bubble-in:#ffffff;--bubble-ai:#e8eff7;--bubble-human:#dff3e7;--warn:#b4560f;--warn-soft:#fdf1e6;--bad:#b42318;--good:#1f7a4a;--radius:12px;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#0e121b;--panel:#161b27;--line:#262d3c;--ink:#e8ecf3;--muted:#9aa3b5;--accent:#8db4dc;--accent-soft:#1d2a3b;--bubble-in:#1d2330;--bubble-ai:#1d2a3b;--bubble-human:#17301f;--warn:#f0a464;--warn-soft:#2f2316;--bad:#f28b82;--good:#6fcf97;color-scheme:dark}}*{box-sizing:border-box}body,html{height:100%;margin:0}body{background:var(--bg);color:var(--ink);font-family:Segoe UI,Heebo,Arial,sans-serif;font-size:15px;line-height:1.5}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.login{min-height:100%;display:grid;place-items:center;padding:16px}.login form{width:min(360px,100%);background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:28px 24px;display:grid;grid-gap:14px;gap:14px}.login h1{margin:0;font-size:22px}.login p{margin:0;color:var(--muted)}.field{width:100%;border:1px solid var(--line);background:var(--bg);border-radius:10px;padding:10px 12px}.btn{border:0;border-radius:10px;padding:10px 14px;background:var(--accent);color:#fff;font-weight:600}@media (prefers-color-scheme:dark){.btn{color:#0e121b}}.btn-quiet{border:1px solid var(--line);background:var(--panel);border-radius:10px;padding:7px 12px}.error{color:var(--bad);margin:0}.inbox{height:100dvh;display:grid;grid-template-columns:340px 1fr}.list{-webkit-border-end:1px solid var(--line);border-inline-end:1px solid var(--line);background:var(--panel);display:flex;flex-direction:column;min-height:0}.list-head{padding:14px 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:8px}.list-head h1{margin:0;font-size:18px}.list-items{overflow-y:auto;flex:1 1}.item{width:100%;text-align:start;border:0;border-bottom:1px solid var(--line);background:transparent;padding:12px 16px;display:grid;grid-gap:2px;gap:2px}.item:hover{background:var(--bg)}.item.on{background:var(--accent-soft)}.item-top{display:flex;justify-content:space-between;gap:8px;align-items:baseline}.item-name{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.item-time{font-size:13px}.item-text,.item-time{color:var(--muted);white-space:nowrap}.item-text{overflow:hidden;text-overflow:ellipsis}.tags{display:flex;gap:6px;margin-top:4px}.tag{font-size:13px;border-radius:999px;padding:1px 9px;background:var(--bg);color:var(--muted)}.tag.ai{background:var(--accent-soft);color:var(--accent)}.tag.human{background:var(--bubble-human);color:var(--good)}.tag.attn{background:var(--warn-soft);color:var(--warn);font-weight:600}.chat{display:flex;flex-direction:column;min-height:0;min-width:0}.chat-head{background:var(--panel);border-bottom:1px solid var(--line);padding:12px 16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.chat-who{flex:1 1;min-width:0}.chat-who strong{display:block}.chat-who span{color:var(--muted);font-size:13px;direction:ltr;unicode-bidi:-webkit-isolate;unicode-bidi:isolate}.back{display:none}.switch{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:3px;background:var(--bg)}.switch button{border:0;background:transparent;border-radius:999px;padding:5px 14px;color:var(--muted)}.switch button.on{background:var(--panel);color:var(--ink);font-weight:600;box-shadow:0 1px 3px rgba(0,0,0,.12)}.notice{margin:10px 16px 0;padding:10px 12px;border-radius:10px;background:var(--warn-soft);color:var(--warn);display:flex;gap:10px;align-items:flex-start;justify-content:space-between}.notice p{margin:0}.thread{flex:1 1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:8px}.msg{max-width:min(75%,560px);display:grid;grid-gap:2px;gap:2px}.msg.in{align-self:flex-start}.msg.out{align-self:flex-end}.bubble{padding:8px 12px;border-radius:var(--radius);background:var(--bubble-in);border:1px solid var(--line);white-space:pre-wrap;overflow-wrap:anywhere}.msg.out.ai .bubble{background:var(--bubble-ai);border-color:transparent}.msg.out.human .bubble{background:var(--bubble-human);border-color:transparent}.meta{font-size:13px;color:var(--muted)}.msg.out .meta{text-align:end}.meta .failed{color:var(--bad)}.composer{border-top:1px solid var(--line);background:var(--panel);padding:10px 16px;display:grid;grid-gap:6px;gap:6px}.composer-row{display:flex;gap:8px;align-items:flex-end}.composer textarea{resize:none;min-height:44px;max-height:160px;flex:1 1}.hint{font-size:13px;margin:0}.empty,.hint{color:var(--muted)}.empty{margin:auto;text-align:center;padding:24px;max-width:360px}.empty strong{display:block;color:var(--ink);margin-bottom:4px}.skel{padding:12px 16px;border-bottom:1px solid var(--line);display:grid;grid-gap:8px;gap:8px}.skel i{display:block;height:12px;border-radius:6px;background:var(--line)}.skel i:first-child{width:55%}.skel i:last-child{width:80%}@media (max-width:760px){.inbox{grid-template-columns:1fr}.inbox.open .list,.inbox:not(.open) .chat{display:none}.back{display:inline-flex}.msg{max-width:88%}}.doc{max-width:760px;margin:0 auto;padding:32px 16px 48px}.doc h1{font-size:26px}.doc h2{font-size:18px;margin-top:28px}.doc li,.doc p{color:var(--ink)}