:root{--paper:#f3f5f4;--panel:#ffffff;--surface:#ffffff;--surface-subtle:#edf1ef;--surface-selected:#e5f1ef;--ink:#1d2522;--muted:#626d68;--line:#d4dbd7;--line-strong:#aab5b0;--rail:#202825;--rail-text:#f5f7f6;--teal:#0f766e;--copper:#a34b08;--rose:#be123c;--green:#15803d;--focus:#087ca7;--accent:var(--teal);--accent-soft:var(--surface-selected);--shadow:0 8px 24px rgba(15,23,42,0.08);--shadow-soft:0 3px 10px rgba(15,23,42,0.06)}.shell{min-height:100vh;display:grid;grid-template-columns:280px minmax(0,1fr)}.sidebar{background:var(--rail);color:var(--rail-text);padding:28px 20px;display:flex;flex-direction:column;gap:32px}.brand{display:flex;align-items:center;gap:14px}.brand-mark{width:48px;height:48px;display:grid;place-items:center;background:var(--copper);color:var(--panel);font-weight:900;border-radius:6px}.brand span,.brand strong{display:block}.brand 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