**Dialog** — centered modal over a dark scrim (blur). Click scrim or × to close.

```jsx
<Dialog open={open} onClose={close} title="Fale com a gente"
  footer={<><Button variant="ghost" onClick={close}>Cancelar</Button><Button variant="accent">Enviar</Button></>}>
  Preencha o formulário e retornamos em breve.
</Dialog>
```
