Subtitle justification on image overlap card

I used the code below to get the subtitle to align right with the title. Couldn't figure out how to do it in Site Styles. It doesn't stick in mobile view though. Help please?

Thanks!

#homepage .sqs-block-image .design-layout-overlap:not(.sqs-narrow-width) .image-subtitle p {
  text-align: right !important;
}

Can you share link to page in screenshot? We can check easier.