:root{--bg:#eff6f5;--surface:#fff;--surface-muted:#f5f7f2;--ink:#000;--ink-muted:#222;--line:#cbd9d6;--primary:#0b5d57;--primary-strong:#06443f;--accent:#2f6f9f;--user-bubble:#cceff7;--assistant-bubble:#fff;--warning:#9a3412;--danger:#a11d33;--success:#207342;--shadow:0 18px 50px #102a261f}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled,textarea:disabled{cursor:not-allowed;opacity:.7}.app-frame{min-height:100vh;padding:24px}.centered-frame,.login-frame{place-items:center;display:grid}.loading-panel,.login-panel,.side-panel,.chat-panel,.document-panel,.process-trace,.empty-state,.project-card{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:8px}.loading-panel{color:var(--ink-muted);padding:24px 28px}.login-shell{grid-template-columns:140px minmax(320px,420px);align-items:stretch;width:min(680px,100%);min-height:380px;display:grid}.brand-mark{background:var(--primary);color:#fff;border-radius:8px 0 0 8px;place-items:center;font-size:44px;font-weight:800;display:grid}.login-panel{border-left:0;border-radius:0 8px 8px 0;padding:34px}.login-panel h1,.topbar h1,.section-heading h2,.workspace-meta h2,.document-toolbar h2,.section-block h3{margin:0;line-height:1.15}.login-panel h1{margin-bottom:28px;font-size:34px}.eyebrow{color:var(--accent);letter-spacing:0;text-transform:uppercase;margin:0 0 6px;font-size:11px;font-weight:800}.form-stack{gap:16px;display:grid}.form-stack label{color:var(--ink-muted);gap:7px;font-size:13px;font-weight:700;display:grid}input,textarea{border:1px solid var(--line);width:100%;color:var(--ink);background:#fff;border-radius:8px;padding:11px 12px;line-height:1.35}textarea{resize:vertical}.primary-button,.secondary-button,.ghost-button{white-space:nowrap;border:1px solid #0000;border-radius:8px;min-height:40px;padding:9px 13px;font-weight:800}.primary-button{background:var(--primary);color:#fff}.primary-button:hover{background:var(--primary-strong)}.secondary-button{background:var(--surface-muted);border-color:var(--line);color:var(--ink)}.ghost-button{border-color:var(--line);color:var(--ink-muted);background:0 0}.topbar{border:1px solid var(--line);background:#ffffffd1;border-radius:8px;justify-content:space-between;align-items:center;gap:18px;max-width:1500px;margin:0 auto 22px;padding:16px 18px;display:flex}.topbar h1{font-size:26px}.topbar-actions,.button-row,.document-toolbar{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.user-pill,.file-chip,.status-pill{border-radius:999px;align-items:center;min-height:30px;padding:5px 10px;font-size:12px;font-weight:800;display:inline-flex}.user-pill{background:var(--user-bubble)}.file-chip{color:var(--primary-strong);background:#e6f3ec}.dashboard-grid{grid-template-columns:minmax(0,1fr) 390px;gap:18px;max-width:1500px;margin:0 auto;display:grid}.dashboard-main{min-width:0}.section-heading,.workspace-meta,.document-toolbar{justify-content:space-between;margin-bottom:16px}.section-heading{align-items:center;gap:16px;display:flex}.section-heading h2,.workspace-meta h2,.document-toolbar h2{font-size:22px}.section-heading.compact{margin-bottom:12px}.empty-state{padding:34px}.empty-state h3{margin:0 0 8px;font-size:22px}.empty-state p{color:var(--ink-muted);margin:0;line-height:1.5}.project-list{gap:12px;display:grid}.project-card{text-align:left;width:100%;color:var(--ink-muted);gap:5px;padding:18px;display:grid}.project-card:hover{border-color:var(--primary)}.project-card-title{color:var(--ink);font-size:18px;font-weight:800}.side-panel{box-shadow:none;align-self:start;padding:18px}.workspace-grid{grid-template-columns:minmax(360px,.85fr) minmax(520px,1.15fr);gap:18px;max-width:1500px;height:calc(100vh - 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