.i8wpkhho { Vertical-align:top; Cursor: Pointe... Link

The "deep story" part of your query refers to the Facebook or Thread ID structure, where CSS classes like these are dynamically generated or used to control the layout of profile thumbnails, usernames, or timestamp links that are clickable. CSS Breakdown

: Aligns the element (often an icon or text) to the top of its line height or container. .i8WPkhho { vertical-align:top; cursor: pointe...

Are you trying to from a specific story, or are you debugging a layout issue on a site using these classes? The "deep story" part of your query refers