:root{--bg:#f3f5f7;--paper:#fff;--ink:#1f2933;--muted:#66737f;--line:#dce2e7;--nav:#17324d;--nav2:#10263b;--accent:#2e6f95;--ok:#2f7d5d;--warn:#a56518;--bad:#a43c3c;--soft:#eef3f6;--radius:14px;--shadow:0 8px 24px rgba(20,36,52,.07)}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}body{min-height:100vh}.app-shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}.sidebar{background:linear-gradient(180deg,var(--nav),var(--nav2));color:#fff;padding:22px 16px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;z-index:30}.brand{display:flex;gap:12px;align-items:center;padding:4px 8px 22px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:18px}.brand-mark{width:42px;height:42px;border-radius:10px;background:#fff;color:var(--nav);display:grid;place-items:center;font-weight:800}.brand strong{display:block;font-size:16px}.brand 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