Posts do not use theme styling

I’m trying to figure out how this plugin works, so forgive me if this is a noob question.
I’ve managed to set things up so it loads new posts when I scroll down the page. However, the posts that come in don’t use the theme styling which makes everything look very ugly. Is it possible to have them somehow inherit style set by the theme – or how can I go about styling them?

This is the theme I use: https://themeforest.net/item/the-fox-contemporary-magazine-theme-for-creators/11103012

This is my current shortcode:
[ajax_load_more id="alm_8114462246" loading_style="grey" css_classes="primary56" post_type="post"[ajax_load_more id="alm_8114462246" loading_style="grey" css_classes="container container--main" post_type="post" posts_per_page="3" post_format="standard" category="annons,business,kulturochnoje,orebro" placeholder="true" scroll_distance="150" button_label="Mer l?sning" button_loading_label="Laddar artiklar" button_done_label="Inga fler artiklar"] posts_per_page="3" post_format="standard" category="annons,business,kulturochnoje,orebro" placeholder="true" scroll_distance="150" button_label="Mer l?sning" button_loading_label="Laddar artiklar" button_done_label="Inga fler artiklar"]

Unfortunately, I’m unable to share a link to the site as we do not have a staging site and cannot display the site in this current state.