:root{--font-sans:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;--color-page-bg:#eef2f7;--color-surface:#fff;--color-header-bg:#1f2b3d;--color-text-main:#243044;--color-text-muted:#64748b;--color-text-heading:#334155;--color-text-inverse:#fff;--color-border:#dfe5ec;--color-border-hover:#cbd5e1;--shadow-card:0 4px 12px #0f172a0f;--shadow-popup:0 16px 40px 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