:root{--text:#4b5563;--text-strong:#111827;--muted:#6b7280;--bg:#f6f7f9;--surface:#fff;--surface-muted:#f9fafb;--border:#e5e7eb;--border-strong:#cbd5e1;--accent:#1d4ed8;--accent-strong:#1e40af;--accent-border:#93c5fd;--success:#16a34a;--success-strong:#166534;--success-soft:#dcfce7;--warning:#d97706;--danger:#dc2626;--danger-strong:#991b1b;--danger-border:#fca5a5;--danger-soft:#fee2e2;--info-soft:#eff6ff;--link:#0f766e;--focus:#60a5fa;--code-bg:#111827;--code-text:#e5e7eb;--shadow-sm:0 1px 2px #0f172a0f;--shadow-md:0 16px 40px #0f172a24;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font:16px/1.5 system-ui,Segoe UI,Roboto,sans-serif}@media 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