Features
========

* **Interactive 3D Rendering**
  View protein structures in your browser via NGLViewer.

* **Cα Scatter Plot**
  See the spatial distribution of Cα atoms.

* **Ramachandran Plot**
  Analyze φ (phi) vs. ψ (psi) dihedral angles.

* **Mutation Analysis**
  Compute RMSD and center‐of‐mass shifts for single‐point mutations.

* **Structure Comparison**
  Align and compare two PDB/mmCIF files, reporting RMSD.

* **Downloadable Outputs**
  Export PNG figures and model files (.pdb/.cif).

* **Automatic File Retrieval**
  Fetch PDB or mmCIF coordinates with retry logic and local caching.