.content-blocker__placeholder {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 1rem;
	aspect-ratio: 400 / 266;
	background-color: #f0f0f0;
	padding: 1.5rem;
	text-align: center;
}

.content-blocker__notice {
	margin: 0;
	font-size: 0.875rem;
}

.content-blocker__btn {
	cursor: pointer;
}
```

---

The file structure ends up being:
```
mu-plugins/
├── content-blocker.php
└── content-blocker/
    ├── content-blocker.js
    └── content-blocker.css