:root{color-scheme:light;--bg:#f4f7f8;--card:#fff;--ink:#172a2e;--muted:#697a7e;--line:#dce5e7;--primary:#123b43;--accent:#dff0ed;--danger:#a33333}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}button,input,textarea,select{font:inherit}.hidden{display:none!important}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at top,#d9efeb,transparent 34rem)}.auth-card{width:min(430px,100%);padding:32px;border:1px solid var(--line);border-radius:24px;background:var(--card);box-shadow:0 24px 70px -45px #0c3c44}.logo{width:58px;height:58px;display:grid;place-items:center;border-radius:18px;background:var(--primary);color:#fff;font-weight:800;letter-spacing:.04em}.logo.small{width:40px;height:40px;border-radius:12px}.auth-card h1{margin:18px 0 6px}.auth-card>p{color:var(--muted)}.stack{display:grid;gap:14px;margin-top:24px}.stack label{display:grid;gap:7px;font-size:13px;font-weight:700}.stack input,.stack textarea,.upload-grid input,.upload-grid select,#brain-search{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 12px;background:#fff;color:var(--ink);outline:none}.stack input:focus,.stack textarea:focus,.upload-grid input:focus,.upload-grid select:focus,#brain-search:focus{border-color:#48867f;box-shadow:0 0 0 3px #d8ece8}.primary{border:0!important;background:var(--primary)!important;color:#fff!important}.status{min-height:20px;color:var(--danger)!important;font-size:13px}.app{min-height:100vh;display:grid;grid-template-columns:250px minmax(0,1fr) 330px}.sidebar{background:#102f36;color:#e8f5f3;padding:20px 16px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:12px}.brand strong,.brand span{display:block}.brand span{font-size:11px;opacity:.6;margin-top:3px}.sidebar nav{display:grid;gap:7px;margin-top:32px}.nav{display:flex;align-items:center;gap:10px;width:100%;border:0;border-radius:10px;padding:11px 12px;background:transparent;color:#d7e8e6;text-align:left}.nav:hover,.nav.active{background:#21474e}.nav b{margin-left:auto;background:#315b62;border-radius:999px;padding:2px 7px;font-size:11px}.owner{margin-top:auto;border:1px solid #31545a;border-radius:14px;background:#193b42;padding:13px}.owner span,.owner small{display:block}.owner span{font-size:13px;font-weight:700}.owner small{margin-top:8px;opacity:.72}.link-button{border:0;background:transparent;color:#c7dfdc;padding:8px 0 0;text-decoration:underline}.chat-panel{min-width:0;min-height:100vh;display:grid;grid-template-rows:64px minmax(0,1fr) auto;background:radial-gradient(circle at top,#e0f0ee,transparent 31rem)}header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 24px;background:rgba(255,255,255,.9);backdrop-filter:blur(12px)}header h1,header p{margin:0}header h1{font-size:16px}header p{font-size:12px;color:var(--muted);margin-top:3px}.header-actions{display:flex;align-items:center;gap:10px}.private{font-size:12px;border:1px solid var(--line);border-radius:999px;padding:6px 9px;background:#fff}.ghost,.quick-actions button,.composer button,.actions button,.brain-item button,[data-close]{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:9px;padding:8px 11px}.messages{overflow:auto;padding:28px max(18px,calc((100% - 760px)/2));scrollbar-gutter:stable}.message{display:flex;margin-bottom:18px}.message div{max-width:80%;padding:12px 15px;border-radius:18px;border:1px solid var(--line);background:#fff;font-size:14px;line-height:1.55;box-shadow:0 8px 30px -28px #123}.message.user{justify-content:flex-end}.message.user div{background:var(--primary);color:#fff;border-color:var(--primary);border-bottom-right-radius:5px}.message.assistant div{border-bottom-left-radius:5px}footer{border-top:1px solid var(--line);padding:15px max(18px,calc((100% - 760px)/2));background:rgba(255,255,255,.94)}.quick-actions{display:flex;gap:8px;overflow:auto;margin-bottom:10px}.quick-actions button{white-space:nowrap;border-radius:999px;font-size:12px}.composer{border:1px solid var(--line);border-radius:17px;background:#fff;padding:8px;box-shadow:0 12px 42px -35px #123}.composer textarea{width:100%;min-height:76px;resize:none;border:0;outline:0;padding:8px;background:transparent}.composer>div{display:flex;justify-content:space-between}.composer button{border:0}.composer .send{width:38px;height:38px;padding:0;border-radius:11px;background:var(--primary);color:#fff}footer>p{text-align:center;margin:7px 0 0;color:var(--muted);font-size:10px}.approval-panel{border-left:1px solid var(--line);background:#fbfcfc;padding:20px}.approval-title{display:flex;justify-content:space-between;align-items:flex-start}.approval-title h2,.approval-title p{margin:0}.approval-title h2{font-size:16px}.approval-title p{font-size:12px;color:var(--muted);margin-top:5px}.approval-title>b{background:var(--primary);color:#fff;border-radius:999px;padding:3px 8px;font-size:11px}.actions{display:grid;gap:10px;margin-top:18px}.actions article{border:1px solid var(--line);border-radius:14px;background:#fff;padding:14px}.actions article>span,.tags span{display:inline-block;border-radius:999px;background:var(--accent);padding:4px 8px;font-size:10px}.actions h3{font-size:14px;margin:10px 0 5px}.actions p{font-size:12px;line-height:1.5;color:var(--muted)}.actions article>div{display:flex;gap:7px}.actions button{font-size:12px;padding:7px 9px}.actions button:disabled{opacity:.45}.empty{border:1px dashed var(--line);border-radius:14px;padding:28px;text-align:center;color:var(--muted);font-size:13px}dialog{width:min(760px,calc(100% - 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