:root{--bg-dark:#050510;--card:#ffffff0a;--input-bg:#ffffff0f;--border:#ffffff14;--cyan:#00f3ff;--purple:#bc13fe;--accent:#f97316;--text-main:#fff;--text-dim:#88a;--text-muted:#666680;--font-sans:"Plus Jakarta Sans", sans-serif;--font-mono:"JetBrains Mono", monospace;--radius:12px}[data-theme=light]{--bg-dark:#e8edf5;--card:#fffffff2;--input-bg:#edf2f9;--border:#0000001a;--cyan:#0e7490;--purple:#7c3aed;--accent:#c2410c;--text-main:#0f172a;--text-dim:#334155;--text-muted:#64748b}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-dark);color:var(--text-main);font-family:var(--font-sans);min-height:100vh;padding-top:72px}.calc-shell{max-width:1200px;margin:0 auto;padding:1.5rem 1.5rem 3rem}.breadcrumb{color:var(--text-muted);align-items:center;gap:6px;margin-bottom:1.25rem;font-size:.78rem;display:flex}.breadcrumb a{color:var(--text-dim);text-decoration:none}.breadcrumb 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