:root{--bg:#e7eae8;--bg-alt:#f7f8f6;--panel:#f7f8f6;--panel-edge:#c9cfc9;--ink:#1c2321;--ink-soft:#55605c;--ink-light:#9a9d9b;--rule:#b3bcb6;--border:#d0d4d1;--border-medium:#b3bcb6;--border-light:#dfe1dd;--steel:#3d5a6c;--accent:#d96c1f;--accent-hover:#c55f1a;--accent-ink:#fff;--grid-line:rgba(61,90,108,.1);--red-50:#fef2f2;--red-300:#fca5a5;--red-500:#ef4444;--red-600:#dc2626;--c-bulk:#b8952b;--c-cylinder:#5b7c99;--c-rigid:#6e8b6b;--c-flexible:#a65d57;--font-display:"Futura","Century Gothic","Avenir Next","Trebuchet MS",sans-serif;--font-body:"Segoe UI",system-ui,-apple-system,sans-serif;--font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,"Cascadia Code",Consolas,monospace}@media 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