Stop text overflow on Poster Image Block responsiveness

https://bumblebee-dahlia-r4jw.squarespace.com/config/website/pages/website-tools/custom-css

Hi i have a problem with the text on a poster image overflowing if you resize the screen 

I found an earlier CSS code suggestion which is not working for me. Please help I do not know all the dark arts of CSS.

/* Poster overflow */
@media screen and (max-width:991px) {
div#block-1ad8e95619d3440bbe15 .content-fill {
    padding-bottom: 50% !important;
}
}
@media screen and (max-width:767px) {
div#block-1ad8e95619d3440bbe15 .content-fill {
    padding-bottom: 100% !important;
}
}

Which page you have problems width? /config is url for edit mode

https://bumblebee-dahlia-r4jw.squarespace.com/?noredirect