Most developers think architecture means "drawing boxes and arrows on a whiteboard." It doesn't. Architecture is the set of decisions that are expensive to change later.
NOT architecture: IS architecture:
├── Which CSS framework ├── Monolith vs microservices
├── Tabs vs spaces ├── Database choice (SQL vs NoSQL)
├── Variable naming ├── Synchronous vs asynchronous communication
├── File organization ├── Authentication strategy
└── Test framework ├── Deployment topology
└── Data ownership boundaries
Architecture = the decisions that are hard to reverse. Everything else is implementation detail.