*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f8f9fb;--surface:#fff;--border:#e5e7eb;--text:#0f172a;--muted:#64748b;--card-shadow:0 2px 8px #0000000f;--blue:#2563eb;--blue-dark:#1d4ed8;--blue-light:#eff6ff;--indigo:#7c3aed;--green:#22c55e;--green-dark:#166534;--green-light:#dcfce7;--amber:#f59e0b;--red:#ef4444;--purple:#8b5cf6;--cyan:#06b6d4;--orange:#f97316;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--radius-full:999px;--shadow-blue:0 4px 16px #2563eb40}[data-theme=dark]{--bg:#0d1117;--surface:#161b22;--border:#30363d;--text:#e6edf3;--muted:#8b949e;--card-shadow:0 2px 8px #0000004d;--blue-light:#2563eb26}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:DM Sans,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.6;transition:background .2s,color .2s}.nav{-webkit-backdrop-filter:blur(12px);border-bottom:1px solid 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