mixin h1-heading
    - let classes = ['o-heading', 'o-heading--' + attributes.level]
    h1(class=classes)
        block

mixin h2-heading
    - let classes = ['o-heading', 'o-heading--' + attributes.level]
    h2(class=classes)
        block

mixin h3-heading
    - let classes = ['o-heading', 'o-heading--' + attributes.level]
    h3(class=classes)
        block

mixin h4-heading
    - let classes = ['o-heading', 'o-heading--' + attributes.level]
    h4(class=classes)
        block

mixin h5-heading
    - let classes = ['o-heading', 'o-heading--' + attributes.level]
    h5(class=classes)
        block

mixin h6-heading
    - let classes = ['o-heading', 'o-heading--' + attributes.level]
    h6(class=classes)
        block

mixin div-heading
    - let classes = ['o-heading', 'o-heading--' + attributes.level]
    div(class=classes)
        block