mixin lightbox(images)
    .o-lightbox 
        header.o-lightbox__header.s-colored-links
            block
        +action-button(round=true quiet=true icon='x' class='o-lightbox__close-btn')
        img.o-lightbox__img(src=images[0])
        footer.o-lightbox__footer
            each img, i in images
                - classes = i === 0 ? 'is-selected' : ''
                button.o-lightbox__thumbnail(class=classes)
                    img.o-lightbox__thumbnail-img(src=img)