Tier 1Web (www / app / auth). The full design system: our component library and the components.css recipe. This is the one tier where the recipe is the contract, native tiers take the tokens and nothing else.--component-bg · --line · --alert-radius · --alert-danger-body
01Alert: app.put.ioinfo · success · warning · danger
Attached to the page; persists until the condition clears or the user dismisses it. A toast (see Notification) floats and reports what already happened.

The surface is neutral --component-bg on --line, radius 4; only the icon takes the type color. Optional title, an sm action button in the type's variant, and a dismiss . Form submit errors render here too, above the fields.
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02Callout: auth.put.ioinfo · success · error
auth.put.io page notices use tinted --alert-* callouts with Phosphor icons. Text uses the scale's own body step, never --text on a tint. Form and field errors never take a callout: they ease in as red text (03).
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Brand tone proposed
No shipped surface uses it.
03Field errorsevery field · eased in
Plain red caption under the field, never an alert box. It eases in through .form-reveal over --dur-reveal while the border fades red.
Never do this
Stacking three alerts at the top of a page · a danger alert for anything the user can't fix · an alert that repeats the toast · a dismissible alert for a condition still true after dismissal.