Reference

Input Group

Merged controls: attachments and the entry fused into one seal. The Root draws the single hairline and carries the group's focus halo; the Addon is a recessed cell for the reader's fixed words — a scheme, a unit, a quiet button — placed before or after the entry. Put our Input (or Textarea) inside and its own border and halo step aside in favor of the group's; the stylesheet does the merging, the wrapper adds no visuals of its own.