:root{--bg:#eef3f7;--panel:#fff;--panel-soft:#f7fafc;--text:#162033;--muted:#667085;--line:#dde6ef;--primary:#0f766e;--primary-dark:#115e59;--primary-soft:#dff5f2;--accent:#d97706;--danger:#b42318;--success:#15803d;--warning:#b45309;--info:#2563eb;--sidebar:#0f2f35;--sidebar-soft:#153f46;--shadow:0 18px 55px rgba(15,23,42,.12);--soft-shadow:0 12px 32px rgba(15,23,42,.08)}*{box-sizing:border-box}body,html{background:var(--bg)}body{margin:0;color:var(--text);font-family:Arial,Helvetica,sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{min-height:100vh;display:grid;grid-template-columns:276px minmax(0,1fr);background:radial-gradient(circle at top right,rgba(15,118,110,.12),transparent 34rem),linear-gradient(180deg,#f7fafc 0,var(--bg) 42%)}.sidebar{background:linear-gradient(180deg,var(--sidebar) 0,#0a252a 100%);color:#e7f5f4;padding:18px 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