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README.md

@@ -1,12 +1,23 @@
 ---
-title: Column Buckling Euler Rect
-emoji: 📊
-colorFrom: red
+title: Column Buckling — Euler Elastic (Rectangular)
+emoji: 🏗️
+colorFrom: indigo
 colorTo: blue
 sdk: gradio
-sdk_version: 5.49.0
+sdk_version: "4.44.0"
 app_file: app.py
 pinned: false
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# Column Buckling Calculator — Euler Elastic (Rectangular Section)
+
+A Gradio app that computes the **Euler critical load** about both principal axes for a **rectangular column**, reports the **governing axis**, **slenderness**, **FoS**, and a clear verdict — with a step-by-step arithmetic printout you can read like engineering notes.
+
+## Run locally
+```bash
+pip install -r requirements.txt
+python app.py
+```
+
+## Notes
+- Elastic Euler only (no Johnson/inelastic, no eccentricity/imperfection) — for teaching & study.