How to make h1, h2, h3 versions for a class with scss?

I want to define a class and write different styles for its h1, h2, h3 versions:

.title {
  color: red;
    
  &h1 {
    font-size: 18px;
  }
    
  &h2 {
    font-size: 16px;
  }
}

I expect the CSS output like this:

.title { 
  color: red; 
}
h1.title { 
  font-size: 18px; 
}
h2.title { 
  font-size: 16px; 
}

This is the CSS output I actually get:

.title {
  color: red;
}
.titleh1 {
  font-size: 18px;
}
.titleh2 {
  font-size: 16px;
}

Those headlines should also contain the class .title.

>Solution :

Using this QA as a reference, you’ll need to use @at-root and a placeholder:

.title {
  color: red;

    @at-root {
        h1#{&} {
            font-size: 18px;
        }
        
        h2#{&} {
            font-size: 16px;
        }
    }
}

Gives me this output:

.title {
  color: red;
}
h1.title {
  font-size: 18px;
}

h2.title {
  font-size: 16px;
}