<p class="alert">
    Beware of the zombies
</p>

@layer module, state;

@layer state {
    .alert {
        background-color: brown;
    }
    p {
        border: medium solid limegreen;
    }
}

@layer module {
    .alert {
        border: medium solid violet;
        background-color: yellow;
        color: white;
    }
}