:root{color-scheme:dark;--bg:#0d0e10;--bg-elevated:#141518;--bg-panel:#191a1e;--bg-panel-strong:#202126;--surface-hover:#26272d;--border:#2c2e35;--border-soft:#22242a;--text:#f0f1f4;--text-muted:#a9abb4;--text-subtle:#737780;--accent:#7c8cff;--accent-strong:#a7b0ff;--success:#70d69f;--warning:#e7c36a;--danger:#f28c8c;--shadow:0 20px 60px rgb(0 0 0/34%);--radius-sm:6px;--radius-md:8px;--sidebar-width:316px;--context-width:360px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body,html{min-height:100%;margin:0;background:var(--bg);color:var(--text)}button,input{font:inherit}button{color:inherit}.appShell{display:grid;grid-template-columns:var(--sidebar-width) minmax(520px,1fr) var(--context-width);min-height:100vh;background:linear-gradient(90deg,#111216,#0d0e10 31%,#0b0c0f)}.contextPanel,.sidebar{background:var(--bg-elevated);border-color:var(--border-soft)}.sidebar{display:flex;flex-direction:column;min-width:0;border-right:1px solid var(--border-soft)}.headerActions,.sidebarTopbar,.threadHeader{display:flex;align-items:center}.sidebarTopbar{gap:8px;height:54px;padding:0 14px}.iconButton{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid transparent;border-radius:var(--radius-sm);background:transparent;color:var(--text-muted);cursor:pointer}.areaItem:hover,.iconButton:hover,.primaryAction:hover,.utilityNav:hover{background:var(--surface-hover);color:var(--text)}.workspaceSwitcher{display:flex;align-items:center;justify-content:space-between;margin:0 14px 10px;padding:10px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-panel)}.sectionTitle h2,.threadHeader h1,.threadIntro h2,.workspaceSwitcher strong{margin:0;font-weight:650;letter-spacing:0}.workspaceSwitcher strong{display:block;max-width:220px;overflow:hidden;font-size:14px;text-overflow:ellipsis;white-space:nowrap}.microLabel,.navHeading{margin:0;color:var(--text-subtle);font-size:12px;line-height:1.4}.primaryAction{display:flex;align-items:center;gap:9px;width:calc(100% - 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