# Status Page (Notchset): prompt.md (v1.0.0)

- id: `status-page` · version 1.0.0 · block · free
- category: Marketing
- build: Base UI (one set of files; its dependencies follow the build)
- install (this build): `npx shadcn@latest add https://beautiful-ui.dev/r/status-page.json`
- npm dependencies: class-variance-authority@^0.7
- registry dependencies: utils, @beautiful-ui/segmented-control, https://beautiful-ui.dev/r/notchset-foundation.json
- docs: https://beautiful-ui.dev/components/status-page
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

A public status page: the overall state with a pulsing signal dot while anything is down, regions, the active incident with its latest update first and earlier ones folded, each component's 90-day strip with incident days in signal and a hover note, uptime floored to two decimals, past incidents, and email subscription.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: `class-variance-authority@^0.7`.
- Files: `components/ui/notchset/blocks/status-page.tsx`; shared code: `lib/beautiful-ui/notchset/instrument.tsx`, `lib/beautiful-ui/notchset/root.ts`, `lib/beautiful-ui/notchset/button-variants.ts`, `lib/beautiful-ui/notchset/field-classes.ts`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `segmented-control`, `notchset-foundation`.
- Builds: one set of files for both, but its dependencies come in Base UI and Radix builds. Install the one that matches the project (see Install): a free item's bare URL installs the Base UI build of it and its dependencies.
- Exports to keep: `StatusPage`, `uptime`, and every exported type.
- CSS: the install adds the notchset foundation (tokens, keyframes, motion levels) to your global stylesheet once. Nothing to import by hand.
- Re-running `add` (or `--overwrite`) re-applies those rules: put overrides in your own CSS, never in the installed rules.
- Tokens: retheme with the `--notchset-*` custom properties (`--notchset-check`, `--notchset-control-edge`, `--notchset-draw-from`, `--notchset-ease-bloom`, `--notchset-ease-glide`, `--notchset-ease-key-down`, `--notchset-ease-key-up`, `--notchset-ease-travel`, `--notchset-fade`, `--notchset-focus-color`, `--notchset-focus-inset`, `--notchset-grow-to`, `--notchset-key-down`, `--notchset-key-up`, `--notchset-life-from`, `--notchset-life-ms`, `--notchset-node-blink`, `--notchset-node-bloom`, `--notchset-node-delay`, `--notchset-plate-color`, `--notchset-rise-from`, `--notchset-rule`, `--notchset-scan-to`, `--notchset-scroll`, `--notchset-signal`, `--notchset-sweep-to`, `--notchset-travel`). Never add Tailwind colour classes inside the component.

```tsx
import { StatusPage, type StatusRegion } from "@/components/ui/notchset/blocks/status-page";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `StatusPage` | `status-page` | Overall state, incident, components, past incidents and subscription. |

Style a part with `[data-slot="<slot>"]` selectors or its `className`; keep the attributes when editing.

## Sound
- Keep every `data-slot` and `data-sound` attribute: the sound layer reads them.
- Installing this item adds no audio. Nothing plays until the app mounts `SoundProvider` once (install: `npx shadcn@latest add https://beautiful-ui.dev/r/notchset-sound.json`, import from `@/components/ui/notchset/sound-provider`); `useSound()` gives `muted` and `setMuted` for a mute control. Without a provider the audio engine never loads.

## Match the original
- Read `components/ui/notchset/blocks/status-page.tsx` as the reference implementation before changing or recreating anything, and match it: sizes, colours per theme, motion timings, copy and behaviour.
- If you deviate (a prop you can't honour, a style you changed, a dependency you swapped), say so in your reply, part by part.
- Keep the accessibility contract, the keyboard map and the motion levels listed below.

## Use it when
- status page, system status, uptime, incident, outage, service health, statuspage, status history, Notchset
- Your product's public status page
- An in-app health view of the services a customer relies on

### Not when
- Internal metrics dashboards: use charts
- Per-request debugging: use Webhooks or traces

## Mistakes
- Floor uptime, never round: 99.996% is 99.99%, not 100%
- Post updates while investigating, not only when resolved

## Usage

```tsx
import { StatusPage, type StatusRegion } from "@/components/ui/notchset/blocks/status-page";

export function Status({ regions }: { regions: StatusRegion[] }) {
  return (
    <StatusPage
      site="STATUS.ACME.DEV"
      updated="10:52 UTC"
      regions={regions}
      onSubscribe={(email) => fetch("/api/status/subscribe", { method: "POST", body: JSON.stringify({ email }) }).then((r) => {
        if (!r.ok) throw new Error("subscribe failed");
      })}
    />
  );
}
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `site / updated` | `string / string` |  | The line above the headline. |
| `regions` | `{ id, label, components, incident?, past? }[]` |  | Two or more add a region control. components carry 90 day records; an incident lists its updates newest first. |
| `components[].days` | `{ label, kind?, minutes?, note? }[]` |  | kind marks a degraded or outage day; minutes count against uptime, floored so it never rounds up to 100%. |
| `onSubscribe / onUnsubscribe` | `(email) => Promise` |  | Adds the subscribe form; resolve to show SUBSCRIBED. |
| `incidentAction` | `ReactNode` |  | Extra controls inside the incident card (posting an update from an admin view). |

Full docs: https://beautiful-ui.dev/components/status-page

## Customising
- Colours: the component reads your shadcn tokens (`--background`, `--foreground`, `--border` …), refined by the `--notchset-*` tokens. The signal colour is `--notchset-signal` (it falls back to `--destructive`). Set tokens on `:root`, or on any container to retheme one area.
- Dark mode follows the `.dark` class on an ancestor (the shadcn and next-themes convention).
- Update later by re-running the install with `--overwrite` (review the diff if you edited it). Changelog: https://beautiful-ui.dev/r/changelog.json

## Keyboard

| Keys | Action |
|---|---|
| ← → | Change region |
| Enter / Space | Show earlier updates or past incidents |
| Enter | Subscribe from the email field |

## Performance

- 90 spans per component; nothing runs while idle except the status dot's pulse.

## Responsive

- Under 620px (container width) each strip moves under its component's name; past incidents drop the duration under 520px.

## Motion inventory

| Interaction | What moves |
|---|---|
| Strips | Bars grow up 4ms apart; a hovered day inks and names itself |
| Incident | A new update rises in; earlier ones unroll in 380ms |
| Overall | The dot pulses in signal while anything is down |

## Accessibility contract (preserve when editing)
- The headline is announced as the state changes; each strip is an image labelled with its uptime and incident count
- Earlier updates and past incidents are buttons with aria-expanded; folded content is inert
- The subscribe field is labelled, marks invalid input and its message is announced

## Install

Base UI project (a base-* style in components.json):

```bash
npx shadcn@latest add https://beautiful-ui.dev/r/status-page.json
```

Radix project (a radix-*, new-york or default style):

```bash
npx shadcn@latest add https://beautiful-ui.dev/r/radix-nova/status-page.json
```

Or add the `@beautiful-ui` registry to components.json and run `npx shadcn@latest add @beautiful-ui/status-page`: the CLI picks the build from your style.

## Credits
- Built on shadcn/ui (https://ui.shadcn.com)

## Source (Base UI build)

### components/ui/notchset/blocks/status-page.tsx

```tsx
"use client";

import * as React from "react";
import { cn } from "@/lib/utils";
import { inputClass } from "@/lib/beautiful-ui/notchset/field-classes";
import { buttonVariants } from "@/lib/beautiful-ui/notchset/button-variants";
import { SegmentedControl } from "@/components/ui/notchset/segmented-control";
import { NOTCHSET_ROOT, OWN_SOUND, Scanner, motionOff, playCue } from "@/lib/beautiful-ui/notchset/instrument";

/*
 * Notchset Status Page (a block, one file for both builds). What is broken, what is being done, how
 * reliable it has been: the overall state (a pulsing signal dot while anything is down), regions, the
 * active incident with its latest update first and earlier ones folded, every component with a 90-day
 * strip (incident days taller, in signal; hover names the day) and its uptime floored to two decimals,
 * past incidents in a fold, and an email subscription. Everything is worked out from the data you pass.
 */

export type StatusLevel = "operational" | "degraded" | "outage" | "recovering";
export type StatusDay = { label: string; kind?: "degraded" | "outage"; minutes?: number; note?: string };
export type StatusComponent = { name: string; status: StatusLevel; days: readonly StatusDay[] };
export type StatusUpdate = { status: string; time: string; text: string };
export type StatusIncident = { title: string; component: string; since: string; resolved?: boolean; updates: readonly StatusUpdate[] };
export type StatusRegion = { id: string; label: string; components: readonly StatusComponent[]; incident?: StatusIncident; past?: readonly { date: string; title: string; duration: string; kind: "degraded" | "outage" }[] };

export type StatusPageProps = Omit<React.ComponentProps<"section">, "children" | "title"> & {
  /** The site line, e.g. STATUS.RELAY.DEV. */
  site: string;
  updated: string;
  regions: readonly StatusRegion[];
  region?: string;
  onRegionChange?: (id: string) => void;
  /** Subscribe to updates; resolve once subscribed, reject to show the error. */
  onSubscribe?: (email: string) => Promise<unknown>;
  onUnsubscribe?: (email: string) => Promise<unknown>;
  /** Extra controls inside the incident card (the demo steps through updates). */
  incidentAction?: React.ReactNode;
};

const small = "font-mono text-[12px] tracking-[0.04em] whitespace-nowrap";
const signalText = "text-[var(--notchset-signal-text,var(--destructive))]";
const EMAIL = /^[^\s@]+@[^\s@]+\.[^\s@]{2,}$/;
const LEVEL: Record<StatusLevel, string> = { operational: "OPERATIONAL", degraded: "DEGRADED", outage: "OUTAGE", recovering: "RECOVERING" };
/** Uptime over the days shown, floored to two decimals: a 6-minute incident reads 99.99%, never 100%. */
export function uptime(days: readonly StatusDay[]) {
  const down = days.reduce((n, d) => n + (d.kind ? (d.minutes ?? 0) : 0), 0);
  return `${(Math.floor((100 - (down / (days.length * 1440)) * 100) * 100) / 100).toFixed(2)}%`;
}

function Chevron({ open }: { open: boolean }) {
  return (
    <svg aria-hidden width="12" height="12" viewBox="0 0 12 12" className={cn("flex-none transition-[rotate] duration-300 ease-(--notchset-ease-unfold)", open && "rotate-180")}>
      <path d="M2.5 4.5 L6 8 L9.5 4.5" fill="none" className="stroke-current" strokeWidth="1.4" />
    </svg>
  );
}

function Fold({ open, children }: { open: boolean; children: React.ReactNode }) {
  return (
    <div className={cn("grid grid-cols-[minmax(0,1fr)] transition-[grid-template-rows]", open ? "grid-rows-[1fr] duration-[380ms] ease-(--notchset-ease-unfold)" : "grid-rows-[0fr] duration-[260ms] ease-(--notchset-ease-fold)")}>
      <div inert={!open || undefined} className="min-h-0 overflow-hidden">
        {children}
      </div>
    </div>
  );
}

function Strip({ c }: { c: StatusComponent }) {
  const [hover, setHover] = React.useState(-1);
  const incidents = c.days.filter((d) => d.kind).length;
  const tip = c.days[hover];
  return (
    <div role="img" aria-label={`${c.name}, ${uptime(c.days)} uptime over ${c.days.length} days, ${incidents} ${incidents === 1 ? "incident" : "incidents"}`} onMouseLeave={() => setHover(-1)} className="relative flex h-7 items-end gap-0.5">
      {c.days.map((d, i) => (
        <span
          key={i}
          onMouseEnter={() => setHover(i)}
          className={cn("flex-1 origin-bottom motion-safe:animate-[notchset-bar-up_420ms_var(--notchset-ease-unfold)_both]", d.kind ? "bg-[var(--notchset-signal,var(--destructive))]" : hover === i ? "bg-foreground" : "bg-[var(--notchset-control-edge,var(--input))]", d.kind === "outage" ? "h-7" : d.kind ? "h-[22px]" : "h-3.5")}
          style={{ animationDelay: `${i * 4}ms` }}
        />
      ))}
      {tip && (
        <span aria-hidden className={cn(small, "pointer-events-none absolute bottom-[calc(100%+8px)] z-[5] flex h-7 items-center bg-foreground px-2.5 font-medium text-background")} style={{ left: `${((hover + 0.5) / c.days.length) * 100}%`, translate: hover < 12 ? "-10% 0" : hover > c.days.length - 12 ? "-90% 0" : "-50% 0" }}>
          {tip.label} · {tip.note ?? (tip.kind ? tip.kind.toUpperCase() : "NO INCIDENTS")}
        </span>
      )}
    </div>
  );
}

function StatusPage({ site, updated, regions, region: regionProp, onRegionChange, onSubscribe, onUnsubscribe, incidentAction, className, ...props }: StatusPageProps) {
  const [ownRegion, setOwnRegion] = React.useState(regions[0]?.id ?? "");
  const regionId = regionProp ?? ownRegion;
  const R = regions.find((r) => r.id === regionId) ?? regions[0];
  const [earlier, setEarlier] = React.useState(false);
  const [pastOpen, setPastOpen] = React.useState(false);
  const [email, setEmail] = React.useState("");
  const [sub, setSub] = React.useState<{ state: "form" | "busy" | "done"; error?: string }>({ state: "form" });
  const [shaking, setShaking] = React.useState(false);
  const root = React.useRef<HTMLElement>(null);
  if (!R) return null;
  const down = R.components.filter((c) => c.status !== "operational");
  const outage = down.some((c) => c.status === "outage");
  const live = R.incident && !R.incident.resolved;
  const headline = down.length === 0 ? "All systems operational" : outage ? "Major outage" : "Degraded performance";
  const ups = R.incident?.updates ?? [];

  const subscribe = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!onSubscribe || sub.state === "busy") return;
    const v = email.trim();
    if (!EMAIL.test(v)) {
      playCue(root.current, "signal");
      if (!motionOff(root.current)) setShaking(true);
      setSub({ state: "form", error: v ? "THAT EMAIL LOOKS INCOMPLETE" : "ENTER AN EMAIL ADDRESS" });
      return;
    }
    setSub({ state: "busy" });
    try {
      await onSubscribe(v);
      playCue(root.current, "done");
      setSub({ state: "done" });
    } catch {
      playCue(root.current, "signal");
      setSub({ state: "form", error: "COULDN’T SUBSCRIBE · TRY AGAIN" });
    }
  };

  return (
    <section {...NOTCHSET_ROOT} ref={root} data-slot="status-page" aria-label={`Status · ${headline}`} className={cn("@container box-border border border-solid border-foreground bg-background text-foreground", className)} {...props}>
      <div className="flex flex-wrap items-end justify-between gap-4 border-0 border-b border-solid border-foreground px-6 pt-[22px] pb-[18px] @max-[520px]:px-4">
        <div className="flex min-w-0 flex-col gap-2.5">
          <span className={cn(small, "whitespace-normal text-muted-foreground")}>
            {site} · UPDATED {updated}
          </span>
          <span className="flex items-center gap-3">
            <span aria-hidden className={cn("size-3.5 flex-none rounded-full transition-colors duration-300 ease-linear", down.length ? "bg-[var(--notchset-signal,var(--destructive))] motion-safe:animate-[notchset-pulse_1400ms_linear_infinite]" : "bg-foreground")} />
            <h2 aria-live="polite" className={cn("m-0 text-[clamp(26px,7cqi,32px)] leading-[0.95] font-extrabold uppercase transition-colors duration-300 ease-linear [font-stretch:62%]", down.length ? signalText : "text-foreground")}>
              {headline}
            </h2>
          </span>
        </div>
        {regions.length > 1 && (
          <SegmentedControl
            aria-label="Region"
            segment={72}
            options={regions.map((r) => ({ value: r.id, label: r.label }))}
            value={R.id}
            onValueChange={(v) => {
              setOwnRegion(v);
              onRegionChange?.(v);
            }}
          />
        )}
      </div>

      <Fold open={!!R.incident}>
        {R.incident && (
          <div className={cn("mx-6 mt-[18px] box-border flex flex-col gap-3.5 border border-solid p-4 transition-colors duration-300 ease-linear @max-[520px]:mx-4", live ? "border-[var(--notchset-signal-text,var(--destructive))] bg-[var(--notchset-tint,color-mix(in_oklab,var(--destructive)_10%,transparent))]" : "border-foreground bg-[var(--notchset-field,var(--muted))]")}>
            <div className="flex flex-wrap items-start justify-between gap-3">
              <span className="flex min-w-0 flex-[1_1_220px] flex-col gap-1.5">
                <span className={cn(small, "font-medium tracking-[0.06em]", live ? signalText : "text-foreground")}>{live ? "ACTIVE INCIDENT" : "✓ RESOLVED INCIDENT"}</span>
                <span className="text-[17px] font-semibold">{R.incident.title}</span>
              </span>
              <span className={cn(small, "text-muted-foreground")}>
                {R.incident.component.toUpperCase()} · SINCE {R.incident.since}
              </span>
            </div>
            <ol className="relative m-0 flex list-none flex-col p-0">
              <span aria-hidden className="absolute start-1.5 top-2.5 bottom-2.5 w-px bg-[var(--notchset-control-edge,var(--input))]" />
              {ups.map((u, i) => {
                const latest = i === 0;
                const resolved = u.status === "RESOLVED";
                return (
                  <li key={`${u.status}-${u.time}`}>
                    <Fold open={latest || earlier}>
                      <div className={cn("relative grid grid-cols-[116px_minmax(0,1fr)] gap-x-3 gap-y-1 pt-1.5 pb-2.5 ps-[26px] @max-[520px]:grid-cols-1", latest && "motion-safe:animate-[notchset-rise_360ms_var(--notchset-ease-settle)]")}>
                        <span aria-hidden className={cn("absolute start-0 top-[9px] box-border size-[13px] rounded-full border-[1.5px] border-solid", latest ? (resolved ? "border-foreground bg-foreground" : "border-[var(--notchset-signal-text,var(--destructive))] bg-[var(--notchset-signal,var(--destructive))]") : "border-[var(--notchset-control-edge,var(--input))] bg-background")} />
                        <span className="flex flex-col gap-[3px]">
                          <span className={cn(small, "font-medium", latest ? (resolved ? "text-foreground" : signalText) : "text-muted-foreground")}>{u.status}</span>
                          <span className={cn(small, "text-muted-foreground")}>{u.time}</span>
                        </span>
                        <span className="text-[14px] leading-[1.5] [text-wrap:pretty]">{u.text}</span>
                      </div>
                    </Fold>
                  </li>
                );
              })}
            </ol>
            {ups.length > 1 && (
              <button
                {...OWN_SOUND}
                type="button"
                aria-expanded={earlier}
                onClick={() => {
                  playCue(root.current, "tick");
                  setEarlier((e) => !e);
                }}
                className={cn(`notchset-focus`, "flex h-8 cursor-pointer items-center gap-2 self-start border-0 bg-transparent p-0 ps-[26px] font-mono text-[12px] font-medium tracking-[0.04em] whitespace-nowrap text-foreground [--notchset-focus-inset:-3px]")}
              >
                {earlier ? "HIDE EARLIER UPDATES" : `SHOW ${ups.length - 1} EARLIER UPDATE${ups.length > 2 ? "S" : ""}`}
                <Chevron open={earlier} />
              </button>
            )}
            {incidentAction && <div className="flex flex-wrap items-center gap-2.5">{incidentAction}</div>}
          </div>
        )}
      </Fold>

      <div className="mx-6 mt-[18px] @max-[520px]:mx-4">
        <div className={cn(small, "grid h-8 grid-cols-[minmax(150px,1fr)_minmax(0,2.2fr)_84px] items-end gap-4 border-0 border-b border-solid border-foreground pb-2 text-muted-foreground @max-[620px]:grid-cols-[minmax(0,1fr)_84px]")}>
          <span>COMPONENT</span>
          <span className="flex flex-wrap justify-between @max-[620px]:hidden gap-x-3 gap-y-1">
            <span>{R.components[0]?.days.length ?? 90} DAYS AGO</span>
            <span>TODAY</span>
          </span>
          <span className="text-end">UPTIME</span>
        </div>
        {R.components.map((c) => {
          const bad = c.status !== "operational";
          return (
            <div key={c.name} className="relative grid min-h-[60px] grid-cols-[minmax(150px,1fr)_minmax(0,2.2fr)_84px] items-center gap-4 border-0 border-b border-solid border-[var(--notchset-rule,var(--border))] @max-[620px]:grid-cols-[minmax(0,1fr)_84px] @max-[620px]:gap-y-2 @max-[620px]:py-3">
              <span className="flex min-w-0 items-center gap-2.5">
                <span aria-hidden className={cn("box-border size-[9px] flex-none rounded-full border-[1.5px] border-solid transition-colors duration-300", bad ? "border-[var(--notchset-signal,var(--destructive))] bg-[var(--notchset-signal,var(--destructive))]" : "border-foreground bg-foreground")} />
                <span className="flex min-w-0 flex-col gap-[3px]">
                  <span className="text-[14px] font-medium">{c.name}</span>
                  <span className={cn(small, "truncate transition-colors duration-300", bad ? signalText : "text-muted-foreground")}>{LEVEL[c.status]}</span>
                </span>
              </span>
              <div className="@max-[620px]:order-3 @max-[620px]:col-span-2">
                <Strip key={R.id} c={c} />
              </div>
              <span className="text-end font-mono text-[14px] tabular-nums">{uptime(c.days)}</span>
            </div>
          );
        })}
      </div>

      {R.past && R.past.length > 0 && (
        <div className="mx-6 mt-[18px] border-0 border-t border-solid border-[var(--notchset-rule,var(--border))] @max-[520px]:mx-4">
          <button
            {...OWN_SOUND}
            type="button"
            aria-expanded={pastOpen}
            onClick={() => {
              playCue(root.current, "tick");
              setPastOpen((o) => !o);
            }}
            className={cn(`notchset-focus`, "flex h-12 w-full cursor-pointer items-center gap-2 border-0 bg-transparent p-0 text-start font-mono text-[12px] font-medium tracking-[0.06em] text-foreground [--notchset-focus-inset:-3px]")}
          >
            <span className="flex-1">PAST INCIDENTS</span>
            <span className="font-normal text-muted-foreground">{R.past.length}</span>
            <Chevron open={pastOpen} />
          </button>
          <Fold open={pastOpen}>
            <ul className="m-0 flex list-none flex-col p-0 pb-3">
              {R.past.map((p) => (
                <li key={`${p.date}-${p.title}`} className="grid min-h-12 grid-cols-[72px_minmax(0,1fr)_auto_auto] items-center gap-3 border-0 border-t border-solid border-[var(--notchset-rule,var(--border))] py-2 @max-[520px]:grid-cols-[64px_minmax(0,1fr)_auto]">
                  <span className={cn(small, "text-muted-foreground")}>{p.date}</span>
                  <span className="min-w-0 text-[14px]">{p.title}</span>
                  <span className={cn(small, "text-muted-foreground @max-[520px]:hidden")}>{p.duration}</span>
                  <span className={cn(small, "box-border flex h-[22px] items-center border border-solid px-1.5 font-medium", p.kind === "outage" ? cn("border-[var(--notchset-signal-text,var(--destructive))]", signalText) : "border-[var(--notchset-rule,var(--border))]")}>{p.kind === "outage" ? "OUTAGE" : "DEGRADED"}</span>
                </li>
              ))}
            </ul>
          </Fold>
        </div>
      )}

      {onSubscribe && (
        <div className="mx-6 mt-2 mb-6 flex flex-col gap-2 border-0 border-t border-solid border-[var(--notchset-rule,var(--border))] pt-4 @max-[520px]:mx-4">
          {sub.state === "done" ? (
            <div role="status" className="flex flex-wrap items-center gap-3">
              <span className={cn(small, "min-w-0 truncate font-medium")}>✓ SUBSCRIBED · {email.trim()}</span>
              <button
                {...OWN_SOUND}
                type="button"
                onClick={async () => {
                  playCue(root.current, "tick");
                  await onUnsubscribe?.(email.trim());
                  setSub({ state: "form" });
                  setEmail("");
                }}
                className={cn(`notchset-focus`, "h-8 cursor-pointer border-0 bg-transparent px-1 font-mono text-[12px] tracking-[0.04em] text-muted-foreground underline underline-offset-[3px] hover:text-foreground [--notchset-focus-inset:-3px]")}
              >
                UNSUBSCRIBE
              </button>
            </div>
          ) : (
            <form noValidate onSubmit={subscribe} onAnimationEnd={() => setShaking(false)} className={cn("flex flex-wrap gap-2", shaking && "motion-safe:animate-[notchset-shake_var(--notchset-shake)_linear]")}>
              <input
                type="email"
                aria-label="Email for status updates"
                aria-invalid={!!sub.error || undefined}
                autoComplete="email"
                value={email}
                readOnly={sub.state === "busy"}
                onChange={(e) => {
                  setEmail(e.target.value);
                  if (sub.error) setSub({ state: "form" });
                }}
                placeholder="you@company.com"
                className={cn(inputClass, "min-w-0 flex-[1_1_220px] font-sans text-[14px]")}
              />
              <button
                {...OWN_SOUND}
                type="submit"
                aria-busy={sub.state === "busy" || undefined}
                className={cn(`notchset-focus`, buttonVariants({ variant: "default", size: "lg" }), "gap-2 [--notchset-focus-inset:-4px]")}
              >
                {sub.state === "busy" && <Scanner height={9} />}
                {sub.state === "busy" ? "SUBSCRIBING" : "SUBSCRIBE"}
              </button>
            </form>
          )}
          <span aria-live="polite" className={cn(small, "whitespace-normal", sub.error ? signalText : "text-muted-foreground")}>
            {sub.error ?? (sub.state === "done" ? "WE EMAIL ON EVERY INCIDENT UPDATE" : "EVERY INCIDENT UPDATE · NO MARKETING")}
          </span>
        </div>
      )}
    </section>
  );
}

export { StatusPage };
```

### lib/beautiful-ui/notchset/instrument.tsx

```tsx
"use client";

import * as React from "react";
import { createPortal } from "react-dom";
import { cn } from "@/lib/utils";

/*
 * Notchset instrument parts, shared by every member of a pack: the node (a round light that reports
 * state), the legend printed above a control, the plate a key presses onto, the traced check, the
 * five-tick scanner, and the glyph flip that lands a changed label left to right. Nodes and checks
 * are inline SVG (round at every DPR); the CSS lives in the Notchset foundation. Also: the one motion
 * policy (reduced motion or a data-motion="off" ancestor), ref composition, the portal container
 * and the sound attributes every Notchset root carries.
 */

// ---------------------------------------------------------------------------------------------
// Motion, refs, portals, sound
// ---------------------------------------------------------------------------------------------

/**
 * Whether motion is off for an element, kept live: it follows the OS reduced-motion setting and any
 * data-motion attribute change above it, so a preference switched mid-playback stops decoration at once.
 */
export function useMotionOff(ref: React.RefObject<Element | null>) {
  const [off, setOff] = React.useState(false);
  React.useEffect(() => {
    const read = () => setOff(motionOff(ref.current));
    const r = requestAnimationFrame(read);
    const mq = window.matchMedia?.("(prefers-reduced-motion: reduce)");
    mq?.addEventListener?.("change", read);
    const mo = new MutationObserver(read);
    mo.observe(document.documentElement, { attributes: true, attributeFilter: ["data-motion"], subtree: true });
    return () => {
      cancelAnimationFrame(r);
      mq?.removeEventListener?.("change", read);
      mo.disconnect();
    };
  }, [ref]);
  return off;
}

/**
 * The microphone, or a rejection after `timeoutMs` (a prompt left open, a denied permission). A stream
 * that arrives after the timeout is stopped at once, so a late "Allow" never leaves the mic on.
 */
export function requestMic(timeoutMs = 5000): Promise<MediaStream> {
  if (typeof navigator === "undefined" || !navigator.mediaDevices?.getUserMedia) return Promise.reject(new Error("no mic"));
  const ask = navigator.mediaDevices.getUserMedia({ audio: true });
  return new Promise((resolve, reject) => {
    let late = false;
    const t = setTimeout(() => {
      late = true;
      reject(new Error("timeout"));
    }, timeoutMs);
    ask.then(
      (stream) => {
        clearTimeout(t);
        if (late) stream.getTracks().forEach((track) => track.stop());
        else resolve(stream);
      },
      (err) => {
        clearTimeout(t);
        reject(err);
      },
    );
  });
}

/** True under prefers-reduced-motion or inside a data-motion="off" scope. Checked when an effect runs. */
export function motionOff(el: Element | null | undefined) {
  if (typeof window === "undefined") return true;
  if (window.matchMedia?.("(prefers-reduced-motion: reduce)").matches) return true;
  return Boolean(el?.closest('[data-motion="off"]'));
}

function assignRef<T>(ref: React.Ref<T> | undefined, node: T | null): () => void {
  if (typeof ref === "function") {
    const cleanup = ref(node);
    return typeof cleanup === "function" ? cleanup : () => ref(null);
  }
  if (ref) (ref as React.RefObject<T | null>).current = node;
  return () => {
    if (ref) (ref as React.RefObject<T | null>).current = null;
  };
}

/**
 * Puts text on the clipboard. Resolves true once it is there and false when the browser refuses (no
 * permission, an insecure page, no clipboard API), so a "copied" state is only ever shown for a copy.
 */
export async function copyText(text: string): Promise<boolean> {
  try {
    await navigator.clipboard.writeText(text);
    return true;
  } catch {
    return false;
  }
}

/** The glide easing shared by travelling marks (selection blocks, highlights, runs). */
export const GLIDE = "cubic-bezier(.65,0,.35,1)";

/** Base UI's className may be a function of state: merges ours with it in either form. */
export const withClass =
  <S,>(base: string, className: string | ((state: S) => string | undefined) | undefined) =>
  (state: S) =>
    cn(base, typeof className === "function" ? className(state) : className);

/** Composes two refs, keeping React 19 ref cleanups. */
export function useComposedRefs<T>(a: React.Ref<T> | undefined, b: React.Ref<T> | undefined): React.RefCallback<T> {
  return React.useCallback(
    (node: T | null) => {
      const release = [assignRef(a, node), assignRef(b, node)];
      return () => release.forEach((f) => f());
    },
    [a, b],
  );
}

/**
 * Runs each step on its own animation frame, in order (the first on the next frame), and returns one
 * cancel that stops whichever frame is pending. A no-op step just waits a frame: frames(set pre, wait,
 * go) lets the browser paint the start state before the transition begins.
 */
export function frames(...steps: (() => void)[]): () => void {
  let id = 0;
  let i = 0;
  const tick = () => {
    steps[i++]?.();
    if (i < steps.length) id = requestAnimationFrame(tick);
  };
  id = requestAnimationFrame(tick);
  return () => cancelAnimationFrame(id);
}
export const wait = () => {};

let idSeq = 0;
/** A unique id for something the user creates (a milestone, a note): random where the browser can, else a counter. */
export const newId = () => (typeof crypto !== "undefined" && "randomUUID" in crypto ? crypto.randomUUID() : `id-${Date.now()}-${++idSeq}`);

/**
 * True while an input method (Japanese, Chinese, Korean…) is composing: Enter, Tab and delimiters
 * then belong to the composition, not to the component. keyCode 229 covers Safari's late flag.
 */
export function composing(e: React.KeyboardEvent | KeyboardEvent) {
  const native = "nativeEvent" in e ? e.nativeEvent : e;
  return native.isComposing || native.keyCode === 229;
}

const hotkeyOwners = new Map<string, number[]>();
let hotkeySeq = 0;
/**
 * A page-wide shortcut ("/" or "mod+k", mod being ⌘ or Ctrl) with a single owner: when several
 * components claim the same key, only the one mounted last answers, so one press never opens two.
 * A plain key is ignored while typing in a field.
 */
export function useHotkey(combo: string | undefined, run: () => void) {
  const latest = useLatest(run);
  React.useEffect(() => {
    if (!combo) return;
    const me = ++hotkeySeq;
    const stack = hotkeyOwners.get(combo) ?? [];
    stack.push(me);
    hotkeyOwners.set(combo, stack);
    const mod = combo.startsWith("mod+");
    const key = (mod ? combo.slice(4) : combo).toLowerCase();
    const onKey = (e: KeyboardEvent) => {
      if (hotkeyOwners.get(combo)?.at(-1) !== me || e.key.toLowerCase() !== key) return;
      if (mod ? !(e.metaKey || e.ctrlKey) : e.metaKey || e.ctrlKey || e.altKey) return;
      if (!mod && (e.target as HTMLElement | null)?.closest("input, textarea, select, [contenteditable=true]")) return;
      e.preventDefault();
      latest.current();
    };
    window.addEventListener("keydown", onKey);
    return () => {
      window.removeEventListener("keydown", onKey);
      const s = hotkeyOwners.get(combo) ?? [];
      s.splice(s.indexOf(me), 1);
    };
  }, [combo, latest]);
}

/** Keeps the latest value in a ref, for callbacks read inside timers and animation frames. */
export function useLatest<T>(value: T) {
  const ref = React.useRef(value);
  React.useLayoutEffect(() => {
    ref.current = value;
  });
  return ref;
}

/*
 * Where Notchset overlays (menus, popovers, tooltips) portal to. Unset, document.body, as shadcn's
 * do. Provide an element to keep them inside a scoped theme: a preview, a widget, a shadow root.
 */
export const NotchsetPortalContext = React.createContext<HTMLElement | null>(null);
export function useNotchsetPortal(): HTMLElement | undefined {
  return React.useContext(NotchsetPortalContext) ?? undefined;
}

const subscribeNothing = () => () => {};

/**
 * A scope that turns motion or sound off for everything inside it, popups included. A plain
 * data-motion="off" wrapper can't reach a menu that portals to the body; this one also gives its
 * overlays a portal host carrying the same preferences (inside any outer scope's host), so motionOff
 * and the cues see them there too.
 */
export function NotchsetScope({ motion, sound, children, ...props }: React.ComponentProps<"div"> & { motion?: "off"; sound?: "off" }) {
  const outer = React.useContext(NotchsetPortalContext);
  const [host, setHost] = React.useState<HTMLElement | null>(null);
  const client = React.useSyncExternalStore(subscribeNothing, () => true, () => false);
  return (
    <div data-motion={motion} data-sound={sound} {...props}>
      <NotchsetPortalContext value={host ?? outer}>{children}</NotchsetPortalContext>
      {client && createPortal(<div ref={setHost} data-slot="notchset-scope-host" data-motion={motion} data-sound={sound} />, outer ?? document.body)}
    </div>
  );
}

export { NOTCHSET_ROOT, OWN_SOUND } from "@/lib/beautiful-ui/notchset/root";

// ---------------------------------------------------------------------------------------------
// Parts
// ---------------------------------------------------------------------------------------------

export type NodeState = "off" | "on" | "live" | "signal";

/** The node: a 9×9 ring whose dot blooms on (`on`), blinks (`live`) or turns signal. */
function Node({ state = "off", delay, className, style, ...props }: Omit<React.ComponentProps<"svg">, "children"> & { state?: NodeState; delay?: number }) {
  return (
    <svg
      aria-hidden
      data-slot="indicator"
      data-state={state}
      width="9"
      height="9"
      viewBox="0 0 9 9"
      className={cn(`notchset-node`, className)}
      style={delay ? ({ "--notchset-node-delay": `${delay}ms`, ...style } as React.CSSProperties) : style}
      {...props}
    >
      <circle data-slot="indicator-ring" cx="4.5" cy="4.5" r="3.25" fill="none" strokeWidth="1" />
      <circle data-slot="indicator-dot" cx="4.5" cy="4.5" />
    </svg>
  );
}

/** A small solid round mark (the node where a leader meets a popup, a pointer): SVG, round at every DPR. */
function Dot({ size = 7, className, style }: { size?: number; className?: string; style?: React.CSSProperties }) {
  return (
    <svg aria-hidden width={size} height={size} viewBox={`0 0 ${size} ${size}`} className={cn("pointer-events-none absolute overflow-visible", className)} style={style}>
      <circle cx={size / 2} cy={size / 2} r={size / 2} fill="currentColor" />
    </svg>
  );
}

/** The legend: a mono label above a control, with an optional node (or any trailing reading). */
function Legend({ label, node, children, className, ...props }: React.ComponentProps<"div"> & { label?: React.ReactNode; node?: NodeState }) {
  return (
    <div data-slot="legend" className={cn(`notchset-legend`, className)} {...props}>
      <span data-slot="legend-label">{label}</span>
      {(children != null || node) && (
        <span data-slot="legend-reading" className="flex items-center gap-2">
          {children}
          {node && <Node state={node} />}
        </span>
      )}
    </div>
  );
}

/** A key on its plate: the plate is an offset frame behind the child; `--notchset-plate-color` tints it. */
function Plated({ className, children, ...props }: React.ComponentProps<"span">) {
  return (
    <span data-slot="plated" className={cn("relative inline-flex", className)} {...props}>
      <span aria-hidden data-slot="plate" className={`notchset-plate`} />
      {children}
    </span>
  );
}

/**
 * The success check. Mounted, it traces itself in over --notchset-check (instant under reduced
 * motion); pass `drawn` to drive the trace yourself.
 */
function Check({ drawn, size = 16 }: { drawn?: boolean; size?: number }) {
  return (
    <svg aria-hidden data-slot="check" width={size} height={size} viewBox="0 0 24 24">
      <path
        d="M4 12.5 L9.5 18 L20 6"
        fill="none"
        stroke="currentColor"
        strokeWidth={1.75}
        strokeLinecap="square"
        pathLength={1}
        strokeDasharray={1}
        className={drawn === undefined ? `notchset-check-draw` : undefined}
        style={drawn === undefined ? undefined : { strokeDashoffset: drawn ? 0 : 1, transition: "stroke-dashoffset var(--notchset-check) var(--notchset-ease-travel)" }}
      />
    </svg>
  );
}

/** The scanner: five 1px ticks fading in turn while something works (static, centre lit, when motion is off). */
function Scanner({ height = 12 }: { height?: number }) {
  return (
    <span aria-hidden data-slot="scanner" className={cn(`notchset-scanner`, "inline-flex items-end gap-[2px]")} style={{ height }}>
      {[0.82, 0.66, 1, 0.66, 0.82].map((h, i) => (
        <span key={i} className="w-px bg-current" style={{ height: height * h, animationDelay: `${i * 140 - 700}ms` }} />
      ))}
    </span>
  );
}

// ---------------------------------------------------------------------------------------------
// Glyph flip: each character cycles through glyphs and lands at 110 + i·14ms, left to right
// ---------------------------------------------------------------------------------------------

const GLYPHS = "ABCDEFGHJKLMNPRSTUVWXYZ0123456789#/+=";
const STILL = new Set([" ", "·", "/", ".", ":"]);
const FLIP_CHARS = 24;

export function scramble(text: string, elapsed: number) {
  let out = "";
  for (let i = 0; i < text.length; i++) {
    const ch = text[i]!;
    // Characters past the 24th land with the 24th, so a long label flips as briefly as a short one.
    out += STILL.has(ch) || elapsed >= 110 + Math.min(i, FLIP_CHARS) * 14 ? ch : GLYPHS[(Math.floor(elapsed / 36) * 5 + i * 11) % GLYPHS.length];
  }
  return out;
}

/**
 * The text to show for `text`: when it changes, a few frames of glyphs that land left to right.
 * Runs on requestAnimationFrame only while a flip is active; the settled text is never state. Off
 * under reduced motion, inside data-motion="off" (pass the element) or with `off`.
 */
export function useGlyphFlip(text: string, { off = false, el }: { off?: boolean; el?: React.RefObject<Element | null> } = {}) {
  const [frame, setFrame] = React.useState<{ for: string; shown: string } | null>(null);
  const first = React.useRef(true);
  React.useEffect(() => {
    if (first.current) {
      first.current = false;
      return;
    }
    if (off || motionOff(el?.current)) return;
    let raf = 0;
    const t0 = performance.now();
    const end = 110 + Math.min(text.length, FLIP_CHARS) * 14 + 40;
    const step = (now: number) => {
      const elapsed = now - t0;
      if (elapsed >= end) {
        setFrame(null);
        return;
      }
      setFrame({ for: text, shown: scramble(text, elapsed) });
      raf = requestAnimationFrame(step);
    };
    raf = requestAnimationFrame(step);
    return () => cancelAnimationFrame(raf);
  }, [text, off, el]);
  // Turned off mid-flip, the label shows its text at once (the cancelled frame never lingers).
  return !off && frame && frame.for === text ? frame.shown : text;
}

/** A label that flips when its text changes; screen readers read the final text only. */
function FlipText({ children, off, className, ref: refProp, ...props }: Omit<React.ComponentProps<"span">, "children"> & { children: string; off?: boolean }) {
  const ref = React.useRef<HTMLSpanElement>(null);
  const refs = useComposedRefs<HTMLSpanElement>(refProp, ref);
  const shown = useGlyphFlip(children, { off, el: ref });
  return (
    <span {...props} ref={refs} data-slot="flip-text" className={cn("relative whitespace-nowrap", className)}>
      <span aria-hidden>{shown}</span>
      <span className="sr-only">{children}</span>
    </span>
  );
}

// ---------------------------------------------------------------------------------------------
// Sound: Notchset components announce cues; the page's beautiful-ui-sound layer (opt-in) plays them.
// ---------------------------------------------------------------------------------------------

/** The Notchset cues, in the shared sound layer's names (played in the mechanical voice). */
export const NOTCHSET_CUES = { tap: "tap", latch: "lock", signal: "destructive", confirm: "halt", done: "success", tick: "tick" } as const;
export type NotchsetCue = keyof typeof NOTCHSET_CUES;

export function playCue(el: Element | null, cue: NotchsetCue) {
  if (!el || typeof CustomEvent === "undefined" || el.closest('[data-sound="off"]')) return;
  el.dispatchEvent(new CustomEvent("beautiful-ui:sound", { bubbles: true, detail: { cue: NOTCHSET_CUES[cue] } }));
}

// ---------------------------------------------------------------------------------------------
// Shortcuts: "⌘↵" → "Meta+Enter Control+Enter" (aria-keyshortcuts)
// ---------------------------------------------------------------------------------------------

const KEY_NAMES: Record<string, string> = { "⌘": "Meta", "⌃": "Control", "⌥": "Alt", "⇧": "Shift", "↵": "Enter", "⏎": "Enter", "⎋": "Escape", "⌫": "Backspace", "⇥": "Tab", "␣": "Space" };

export function kbdToShortcut(kbd: string | undefined): string | undefined {
  if (!kbd) return undefined;
  const parts = [...kbd.replace(/\s+/g, "")].map((c) => KEY_NAMES[c] ?? c.toUpperCase());
  if (!parts.length) return undefined;
  const combo = parts.join("+");
  // ⌘ on a Mac is Ctrl elsewhere: announce both.
  return combo.includes("Meta") ? `${combo} ${combo.replace("Meta", "Control")}` : combo;
}

/**
 * Digits that roll: each digit is a 0–9 strip; the ones digit moves first and each digit to its left
 * 40ms later, counting digits only (620ms, a small overshoot). `delay` offsets the whole text. Other
 * characters (",", "$", "%", letters) sit still. Screen readers get the plain text. The one
 * implementation behind RollingNumber and the calendar's RollingLabel.
 */
export function DigitRoll({ text, height, delay = 0, className }: { text: string; height: number; delay?: number; className?: string }) {
  const chars = [...text];
  let k = 0;
  const order = chars.map((_, i) => (/\d/.test(chars[chars.length - 1 - i]!) ? k++ : 0)).reverse();
  return (
    <span className={cn("relative inline-flex flex-none overflow-hidden tabular-nums", className)} style={{ height, lineHeight: `${height}px` }}>
      <span className="sr-only">{text}</span>
      <span aria-hidden className="flex">
        {chars.map((d, i) =>
          /\d/.test(d) ? (
            <span
              key={chars.length - i}
              className="flex flex-col transition-transform duration-[620ms] ease-[cubic-bezier(.34,1.15,.5,1)] motion-reduce:transition-none"
              style={{ transform: `translateY(${-Number(d) * height}px)`, transitionDelay: `${delay + order[i]! * 40}ms` }}
            >
              {Array.from({ length: 10 }, (_, n) => (
                <span key={n} style={{ height }}>
                  {n}
                </span>
              ))}
            </span>
          ) : (
            <span key={`s${chars.length - i}`}>{d}</span>
          ),
        )}
      </span>
    </span>
  );
}

/** A number that rolls (DigitRoll at the readout's own size). `delay` offsets it (rows 60ms apart). */
function RollingNumber({ value, height = 32, delay = 0, className }: { value: string | number; height?: number; delay?: number; className?: string }) {
  return <DigitRoll text={String(value)} height={height} delay={delay} {...(className ? { className } : {})} />;
}

export { Check, Dot, FlipText, Legend, Node, Plated, RollingNumber, Scanner };
```

### lib/beautiful-ui/notchset/root.ts

```tsx
/*
 * Notchset's root attributes, server-safe (no client directive), so server components can spread
 * them too. Every Notchset root (and portalled popup) carries data-notchset (the motion policy's
 * scope), plays its own cues in the mechanical voice, and keeps the page's click layer out.
 */
export const NOTCHSET_ROOT = { "data-notchset": "", "data-sound": "none", "data-sound-voice": "analogue" } as const;

/** On every interactive element: it plays its own cues, so the page's click layer adds no tap. */
export const OWN_SOUND = { "data-sound": "none" } as const;
```

### lib/beautiful-ui/notchset/button-variants.ts

```tsx
import { cva } from "class-variance-authority";

/*
 * Notchset Button's variants, server-safe like shadcn's: call buttonVariants() from a Server Component
 * (links styled as buttons). The interactive Button lives in a client module.
 */

export const buttonVariants = cva(
  "group/button relative isolate inline-flex shrink-0 cursor-pointer items-center justify-center gap-(--b-gap) rounded-none border-0 font-mono font-medium tracking-[0.06em] whitespace-nowrap uppercase outline-none select-none transition-[background-color,color,translate,border-color] duration-[var(--notchset-fade),var(--notchset-fade),var(--notchset-key-up),var(--notchset-fade)] ease-[var(--notchset-ease-fade),var(--notchset-ease-fade),var(--notchset-ease-key-up),var(--notchset-ease-fade)] disabled:cursor-not-allowed disabled:opacity-40 aria-disabled:cursor-not-allowed aria-disabled:opacity-40 aria-busy:cursor-progress [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-(--b-ic) aria-pressed:bg-primary aria-pressed:text-primary-foreground data-[mode=armed]:bg-[var(--notchset-signal-text,var(--destructive))] data-[mode=armed]:text-primary-foreground data-[mode=hold]:translate-x-[2px] data-[mode=hold]:translate-y-[2px] data-[mode=hold]:duration-[var(--notchset-key-down)] data-[mode=hold]:ease-[var(--notchset-ease-key-down)]",
  {
    variants: {
      variant: {
        default: "bg-primary text-primary-foreground hover:bg-[var(--notchset-primary-hover,color-mix(in_oklab,var(--primary)_86%,var(--background)))] active:bg-[var(--notchset-primary-press,var(--primary))] [--b-tick:var(--notchset-tick-on-primary,color-mix(in_oklab,var(--primary-foreground)_34%,transparent))] [--b-kbd:var(--notchset-kbd-on-primary,color-mix(in_oklab,var(--primary-foreground)_45%,transparent))]",
        destructive:
          "bg-[var(--notchset-signal,var(--destructive))] text-[color:var(--notchset-on-signal,white)] hover:bg-[var(--notchset-signal-hover,var(--destructive))] active:bg-[var(--notchset-signal-press,var(--destructive))] [--b-tick:var(--notchset-tick-on-primary,color-mix(in_oklab,white_34%,transparent))] [--b-kbd:var(--notchset-kbd-on-signal,color-mix(in_oklab,black_40%,transparent))] [--notchset-focus-color:var(--notchset-signal-text,var(--destructive))]",
        outline: "border border-solid border-foreground bg-transparent text-foreground hover:bg-accent active:bg-[var(--notchset-tint-press,var(--accent))]",
        secondary: "bg-secondary text-secondary-foreground hover:bg-[var(--notchset-secondary-hover,var(--secondary))] active:bg-[var(--notchset-secondary-press,var(--secondary))]",
        signal:
          "border border-solid border-[var(--notchset-signal-text,var(--destructive))] bg-background text-[color:var(--notchset-signal-text,var(--destructive))] hover:bg-[var(--notchset-tint,color-mix(in_oklab,var(--destructive)_12%,var(--background)))] [--notchset-button-fill:color-mix(in_oklab,var(--notchset-signal,var(--destructive))_26%,var(--background))] [--notchset-button-meter:var(--notchset-signal,var(--destructive))] [--notchset-focus-color:var(--notchset-signal-text,var(--destructive))]",
        ghost: "bg-transparent text-foreground hover:bg-accent active:bg-[var(--notchset-tint-press,var(--accent))]",
        link: "h-auto min-w-0 justify-start bg-transparent px-0.5 pt-[3px] pb-1.5 text-foreground active:text-[var(--notchset-signal-text,var(--destructive))]",
        plate: "bg-primary text-primary-foreground hover:bg-[var(--notchset-primary-hover,color-mix(in_oklab,var(--primary)_86%,var(--background)))] active:translate-x-[2px] active:translate-y-[2px] active:duration-[var(--notchset-key-down)] active:ease-[var(--notchset-ease-key-down)]",
      },
      size: {
        // The market's heights (shadcn, and Kobra on it): XS 24, S 28, default 32, L 36. Labels are mono caps,
        // which read larger than the 14px sans those libraries use, so 12px (13px on L) matches them optically.
        // Same size names as shadcn, so it stays a drop-in. At least 44px tall on touch screens.
        default: "h-8 min-w-8 px-3 text-[12px] [--b-gap:8px] [--b-ic:16px] [--b-kh:18px] [--b-kfs:10px] pointer-coarse:min-h-11",
        xs: "h-6 min-w-6 px-2 text-[12px] [--b-gap:6px] [--b-ic:14px] [--b-kh:14px] [--b-kfs:10px] pointer-coarse:min-h-11",
        sm: "h-7 min-w-7 px-2.5 text-[12px] [--b-gap:7px] [--b-ic:16px] [--b-kh:16px] [--b-kfs:10px] pointer-coarse:min-h-11",
        lg: "h-9 min-w-9 px-4 text-[13px] [--b-gap:8px] [--b-ic:16px] [--b-kh:20px] [--b-kfs:10px] pointer-coarse:min-h-11",
        icon: "size-8 [--b-ic:16px]",
        "icon-xs": "size-6 [--b-ic:14px]",
        "icon-sm": "size-7 [--b-ic:16px]",
        "icon-lg": "size-9 [--b-ic:16px]",
      },
    },
    // The link's drawn rule lives in the Notchset foundation (a system class, kept out of the utilities).
    // The shared press (a 1px content dip) on every variant but plate, which moves whole onto its plate.
    compoundVariants: [
      { variant: "link", class: `notchset-link` },
      { variant: ["default", "destructive", "outline", "secondary", "signal", "ghost", "link"], class: `notchset-press` },
    ],
    defaultVariants: { variant: "default", size: "default" },
  },
);

export type ButtonVariant = NonNullable<Parameters<typeof buttonVariants>[0]>["variant"];
export type ButtonSize = NonNullable<Parameters<typeof buttonVariants>[0]>["size"];
```

### lib/beautiful-ui/notchset/field-classes.ts

```tsx
import { cn } from "@/lib/utils";

/*
 * Notchset field classes, server-safe (no client directive), so the bare Input and Textarea keep
 * their look in server components. The focus is a 2px ink trace drawn along the bottom edge from the
 * left, never a ring; invalid keeps a signal trace drawn; forced colors get a system outline.
 */

/** The focus trace and states, as utilities on the element itself (no wrapper needed). */
const TRACE =
  "bg-no-repeat [background-image:linear-gradient(var(--foreground),var(--foreground))] [background-position:left_bottom] [background-size:0_2px] focus:[background-size:100%_2px] aria-invalid:[background-image:linear-gradient(var(--notchset-signal,var(--destructive)),var(--notchset-signal,var(--destructive)))] aria-invalid:[background-size:100%_2px] forced-colors:focus:outline forced-colors:focus:outline-2 forced-colors:focus:outline-offset-2 forced-colors:focus:outline-[Highlight] transition-[border-color,background-size] duration-[140ms,200ms] ease-[linear,var(--notchset-ease-travel)] focus:duration-[140ms,300ms]";

export const inputClass = cn(
  "flex h-10 w-full min-w-0 border border-solid border-[var(--notchset-control-edge,var(--input))] bg-background px-3 py-0 font-mono text-[13px] tracking-[0.01em] text-foreground outline-none",
  "caret-[var(--notchset-signal,var(--destructive))] selection:bg-[var(--notchset-tint,color-mix(in_oklab,var(--destructive)_18%,transparent))] placeholder:text-muted-foreground",
  "hover:border-foreground focus:border-foreground aria-invalid:border-[var(--notchset-signal-text,var(--destructive))]",
  "disabled:cursor-not-allowed disabled:border-[var(--notchset-rule,var(--border))] disabled:opacity-40",
  "file:inline-flex file:h-full file:border-0 file:bg-transparent file:font-mono file:text-[11px] file:font-medium file:tracking-[0.07em] file:text-foreground file:uppercase",
  "pointer-coarse:h-11",
  TRACE,
);

export const textareaClass = cn(
  "flex field-sizing-content min-h-24 w-full border border-solid border-[var(--notchset-control-edge,var(--input))] bg-background px-3 pt-[11px] pb-1.5 font-sans text-sm leading-[1.5] text-foreground outline-none",
  "caret-[var(--notchset-signal,var(--destructive))] selection:bg-[var(--notchset-tint,color-mix(in_oklab,var(--destructive)_18%,transparent))] placeholder:text-muted-foreground",
  "hover:border-foreground focus:border-foreground aria-invalid:border-[var(--notchset-signal-text,var(--destructive))]",
  "disabled:cursor-not-allowed disabled:border-[var(--notchset-rule,var(--border))] disabled:opacity-40",
  TRACE,
);
```

The notchset foundation (the tokens listed above, keyframes and motion levels) installs once with the first component; its CSS is public at https://beautiful-ui.dev/r/notchset-foundation.json.