:root{--bg:#f6f7f9;--panel:#fff;--panel-soft:#f0f4f8;--text:#17202a;--muted:#687385;--line:#dce2ea;--brand:#0f766e;--brand-dark:#115e59;--blue:#2563eb;--amber:#b45309;--rose:#be123c;--shadow:0 18px 45px #0f172a14}*{box-sizing:border-box}html,body{background:var(--bg);min-height:100%;color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.shell{grid-template-columns:248px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--line);background:#fff;padding:24px 18px}.brand{align-items:center;gap:10px;margin-bottom:28px;font-weight:800;display:flex}.brand-mark{background:var(--brand);color:#fff;border-radius:8px;place-items:center;width:34px;height:34px;font-weight:800;display:grid}.nav{gap:6px;display:grid}.nav-session{margin-top:6px}.nav a,.nav 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