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