No Card Required Badge Billing Block for Svelte

One trial per company, matched by email domain. The constants at the top hold TRIAL_DAYS, the TAKEN company whose team already started one, and the FREE_MAIL domains that share a single trial. In production the check is a call to your server, because the list of used domains must not live in the page.

A simple shape test (something, an at sign, a domain with a dot) runs as you type, and the message appears under the field once you leave it. Only the server can say whether an address exists or belongs to the person, so treat the shape check as a courtesy, not as verification.

Starting the trial writes "Trial started in this demo, nothing was sent" in the status region and creates nothing. Try halden.example for the team that already has a trial and a free mail address such as gmail.com.

An unavailable button with a stated reason is more useful than a dead one: it stays in the tab order, and pressing it moves nothing but the status line tells you what is missing. It becomes active only for a new company domain.

The field has a visible label and its problem text is attached to it. The result band is the one polite status region, so each result is read as you type and when the answer changes, with its mark hidden from assistive technology and the meaning in words.

Everything is one column. The result band keeps its height so nothing moves while you type, and the button is pinned at the bottom of the screen with the rule above it.