Labelled text field for forms, search, and the config wizard.

<Input label="Site title" placeholder="My Site" icon="globe"
  help="Shown in the navbar and browser tab." />
<Input label="Email" type="email" invalid help="Enter a valid email address." />

Focus shows the primary token ring (red when invalid). Pass icon for a leading Bootstrap Icon, help for helper/error text, disabled to mute the field. Controlled via value + onChange.