Twitter embed in a post doesn't fit in a mobile width, probably because of a fixed 500px rule in our css https://github.com/greenpeace/planet4-master-theme/blob/90c9c38419475cf51b5023bd3195ac816487e1cb/assets/src/scss/pages/post/_article-content.scss#L255.

Instagram embeds should follow the same rule, but it is overloaded by a different one in https://github.com/greenpeace/planet4-plugin-gutenberg-blocks/blob/a42c46cfa5b01f335d73e599595f139b9c3359e4/assets/src/styles/blocks/Media.scss#L92

Tasks

• Check if the faulty rule is used/applied elsewhere
• Remove it, test twitter and instagram embeds with various page widths to ensure it fits in the page