linkStyle: Default + Override

Default edge style with index-specific overrides for critical paths.

linkstyle-default-override.mmd
graph LR
  A[Request] --> B[Auth]
  B --> C[Process]
  C --> D[Response]
  B --> E[Reject]
  linkStyle default stroke:#6b7280,stroke-width:1px
  linkStyle 0,1,2 stroke:#22c55e,stroke-width:2px
  linkStyle 3 stroke:#ef4444,stroke-width:3px
Output
Flowchart, Zombie Mermaid Request Auth Process Response Reject

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