fix(site): show the focus ring only after Tab and show a pointer on controls

src/AGENTS.md

@@ -38,6 +38,14 @@ The code of the docs site and the status page. The root `AGENTS.md` still applie
 - `src/status/` reads the store that a separate checker writes, and never writes to it. It is not prerendered, because it answers from the store at request time.
 - The status build has no `@/` alias. Code under `src/status/`, and any shared module it imports, such as `src/components/analytics.tsx` and `src/lib/analytics.ts`, uses relative imports.
 
+## Focus
+
+- **The ring shows only after Tab, never after a click.** A browser matches `:focus-visible` on an element the reader clicked as soon as any key is pressed, such as an arrow to scroll, so `:focus-visible` alone draws a stray box. `PointerFocus` in `src/components/pointer-focus.tsx`, mounted in both root routes, sets `data-input` on the `html` element: `pointer` on `pointerdown`, `keyboard` on Tab or Shift+Tab. Arrow keys, space and typing change nothing. Before either, there is no value and the ring may show.
+- **One rule draws it.** The "Pointer and focus" section of `src/styles/app.css` draws a 2px ring in half-strength foreground at offset 2px, and switches it off under `html[data-input='pointer']` for everything but a text field, which keeps its focus after a click. It also turns off the shadow ring that Fumadocs components add with `focus-visible:ring-2`, so only one ring is drawn. The same section gives enabled buttons, tabs, summaries and selects the pointer cursor.
+- **Never add per-component `:focus` or `:focus-visible` styles, `outline: none` or `focus-visible:` ring utilities.** They fight the rule and bring back a ring after a click. A new control, scrollable region or custom widget inherits the global rule. If its box clips an outside ring (`overflow: hidden`, a scroll container), add its selector to the inset list in that section, which draws the ring at offset -2px, rather than styling it on its own.
+- A script-focused target that is not in the tab order needs `tabindex="-1"`, which the global rule leaves without a ring.
+- Do not hide a control with `opacity: 0` unless it shows again on focus, because its ring is hidden with it.
+
 ## Tests
 
 - Tests sit beside the code as `*.test.ts` or `*.test.tsx`. Each content lint rule has a test that proves it fires on a bad sample; give a new rule one.
@@ -52,3 +60,4 @@ The code of the docs site and the status page. The root `AGENTS.md` still applie
 - **Analytics grown.** Flag a value import of `posthog-js` outside `src/components/analytics.tsx`, an option that turns on capture, replay, flags or storage, or an agent-read event that gains an IP address, a cookie, a header, a query, a page's text or a value that came from a client and matched no closed list, or that is sent without `$process_person_profile: false`, awaited by the response, or from a build or test without a key.
 - **Limit weakened.** Flag a change that makes the `429` on `/mcp`, `/api/docs/search` or `/api/search` differ from the shapes above, keys a limit on anything but the client's address, stores or sends that address, moves the stage behind work the limit should save, leaves a counted address with no bound on its events, or sends an event for a `429`.
 - **Alias in the status build.** Flag an `@/` import that code under `src/status/` can reach.
+- **Focus ring bypassed.** Flag a `:focus` or `:focus-visible` rule, `outline: none`, or a `focus-visible:` ring or outline utility on a component, a ring that shows after a pointer click, or a change to `PointerFocus` that sets `keyboard` on anything but Tab.

src/components/page-table-of-contents.tsx

@@ -116,7 +116,7 @@ export function PageTableOfContentsPopover() {
           type="button"
           aria-controls={contentId}
           aria-expanded={open}
-          className="flex h-10 w-full items-center gap-2.5 px-4 py-2.5 text-start text-sm text-fd-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-fd-ring"
+          className="flex h-10 w-full items-center gap-2.5 px-4 py-2.5 text-start text-sm text-fd-muted-foreground"
           onClick={() => setOpen((value) => !value)}
         >
           <Text className="size-4 shrink-0" aria-hidden="true" />

src/components/pointer-focus.tsx

@@ -1,19 +1,30 @@
 import { useEffect } from 'react';
 
-// A link clicked with a pointer navigates within the app, so the page changes
-// but focus stays on the link. The next key the reader presses, such as an
-// arrow to scroll, then makes the browser treat that focus as keyboard focus
-// and draw the ring on a sidebar row. Releasing focus after a pointer click
-// avoids that; a link followed from the keyboard (detail 0) keeps its focus.
+// Records how the reader last moved focus, on the root element, so the focus
+// ring in src/styles/app.css shows only after Tab. A browser matches
+// :focus-visible on an element the reader clicked as soon as any key is
+// pressed, so the ring cannot be left to :focus-visible alone.
+//
+// `data-input="pointer"` on any press of the mouse, pen or finger;
+// `data-input="keyboard"` on Tab or Shift+Tab. Arrow keys, space and typing
+// change nothing. Before either, there is no attribute and the ring may show.
 export function PointerFocus() {
   useEffect(() => {
-    const onClick = (event: MouseEvent) => {
-      if (event.detail === 0) return;
-      const link = (event.target as Element | null)?.closest?.('a');
-      if (link) setTimeout(() => link.blur(), 0);
+    const root = document.documentElement;
+    const onPointerDown = () => {
+      root.dataset.input = 'pointer';
+    };
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.key !== 'Tab' || event.altKey || event.ctrlKey || event.metaKey) return;
+      root.dataset.input = 'keyboard';
+    };
+    document.addEventListener('pointerdown', onPointerDown, true);
+    document.addEventListener('keydown', onKeyDown, true);
+    return () => {
+      document.removeEventListener('pointerdown', onPointerDown, true);
+      document.removeEventListener('keydown', onKeyDown, true);
+      delete root.dataset.input;
     };
-    document.addEventListener('click', onClick, true);
-    return () => document.removeEventListener('click', onClick, true);
   }, []);
   return null;
 }

src/status/routes/__root.tsx

@@ -5,6 +5,7 @@ import { RootProvider } from 'fumadocs-ui/provider/tanstack';
 // without either one owning a copy of the other's theme.
 import appCss from '../../styles/app.css?url';
 import { Analytics } from '../../components/analytics';
+import { PointerFocus } from '../../components/pointer-focus';
 
 export const Route = createRootRoute({
   head: () => ({
@@ -46,6 +47,7 @@ function RootComponent() {
         </RootProvider>
         <Scripts />
         <Analytics site="status" />
+        <PointerFocus />
       </body>
     </html>
   );

src/styles/app.css

@@ -284,9 +284,8 @@
 }
 
 /* Sidebar groups and selected-row fills already communicate hierarchy and
-   location. Remove the generated rails, retain a small nested offset, and keep
-   keyboard focus visible inside the scroll viewport rather than clipping an
-   external browser outline. */
+   location. Remove the generated rails, retain a small nested offset, and draw
+   keyboard focus inside the row, so the scroll viewport never clips it. */
 #nd-sidebar [class*='before:bg-fd-border']::before,
 #nd-sidebar-mobile [class*='before:bg-fd-border']::before,
 #nd-sidebar a[data-active='true']::before,
@@ -307,7 +306,6 @@
 }
 #nd-sidebar a:focus-visible,
 #nd-sidebar-mobile a:focus-visible {
-  outline: 2px solid var(--color-fd-ring);
   outline-offset: -2px;
 }
 
@@ -565,9 +563,6 @@ div[data-orientation='horizontal']:has(> [role='tabpanel'] > figure.shiki:only-c
 .marfa-fold-button:hover {
   color: var(--color-fd-foreground);
 }
-.marfa-fold-button:focus-visible {
-  outline-offset: -2px;
-}
 
 .marfa-terminal {
   margin-block: 1rem;
@@ -604,7 +599,6 @@ div[data-orientation='horizontal']:has(> [role='tabpanel'] > figure.shiki:only-c
   color: var(--color-fd-muted-foreground);
   font-size: 0.8125rem;
   font-weight: 500;
-  cursor: pointer;
   list-style: none;
   transition: color 0.15s;
 }
@@ -614,9 +608,6 @@ div[data-orientation='horizontal']:has(> [role='tabpanel'] > figure.shiki:only-c
 .marfa-terminal-fold > summary:hover {
   color: var(--color-fd-foreground);
 }
-.marfa-terminal-fold > summary:focus-visible {
-  outline-offset: -2px;
-}
 .marfa-terminal-fold > summary > svg {
   width: 0.875rem;
   height: 0.875rem;
@@ -705,15 +696,11 @@ div[data-orientation='horizontal']:has(> [role='tabpanel'] > figure.shiki:only-c
 .marfa-paged-arrow[aria-disabled='true'] {
   background-color: color-mix(in oklab, var(--color-fd-foreground) 3%, transparent);
   color: color-mix(in oklab, var(--color-fd-foreground) 28%, transparent);
-  cursor: default;
 }
 .marfa-paged-arrow > svg {
   width: 1rem;
   height: 1rem;
 }
-.marfa-paged-step:focus {
-  outline: none;
-}
 /* A link to a step's heading lands with the card's top row in view: the
    card's own offset plus its border, padding, top row and gap. */
 .marfa-paged-step :is(h2, h3, h4)[id] {
@@ -772,21 +759,67 @@ div[data-orientation='horizontal']:has(> [role='tabpanel'] > figure.shiki:only-c
   }
 }
 
-/* ── Focus ────────────────────────────────────────────────────────────────
-   One neutral ring for keyboard focus everywhere, in place of the browser's
-   blue one, and none after a click. */
+/* ── Pointer and focus ────────────────────────────────────────────────────
+   Tailwind's reset gives every button the default cursor. Anything a reader
+   can press shows a pointer, unless it is disabled. */
+:is(
+    button,
+    input[type='button'],
+    input[type='submit'],
+    input[type='reset'],
+    summary,
+    select,
+    [role='button'],
+    [role='tab'],
+    [role='switch']
+  ):not(:disabled, [aria-disabled='true'], [data-disabled]) {
+  cursor: pointer;
+}
+
+/* One neutral ring for keyboard focus everywhere, and none after a click.
+   src/components/pointer-focus.tsx sets data-input on the root element:
+   "keyboard" once the reader presses Tab, "pointer" on any press of the
+   mouse, pen or finger. Browsers match :focus-visible after a click once a
+   key is pressed, such as an arrow to scroll, so :focus-visible alone would
+   draw a ring on a button the reader only clicked. A text field keeps its
+   focus after a click, because the reader is typing there.
+   Fumadocs also draws a ring of its own with a shadow, which the first
+   declaration turns off. */
 :focus-visible {
-  outline: 2px solid var(--color-fd-ring);
+  --tw-ring-shadow: 0 0 #0000;
+  outline: 2px solid color-mix(in oklab, var(--color-fd-foreground) 50%, transparent);
   outline-offset: 2px;
 }
-:focus:not(:focus-visible) {
+html[data-input='pointer']
+  :focus-visible:not(
+    :is(
+        input:not([type='button'], [type='submit'], [type='reset'], [type='checkbox'], [type='radio']),
+        textarea,
+        select,
+        [contenteditable]:not([contenteditable='false'])
+      )
+  ) {
   outline: none;
 }
-/* A tab list scrolls sideways and would clip a ring drawn outside it, and the
-   search field sits in a box that is already its own focus indicator. */
-[role='tab']:focus-visible {
+/* A target that script focuses, such as a step or a dialog, is never reached
+   with Tab, and a ring around the whole of it says nothing. */
+[tabindex='-1']:focus-visible {
+  outline: none;
+}
+/* A link follows the shape of its text unless a class already rounds it. */
+a:where(:not([class*='rounded'])):focus-visible {
+  border-radius: 4px;
+}
+/* A scrollable region, a tab list or a summary sits in a box that clips
+   what is drawn outside it, so its ring is drawn inside. */
+[tabindex='0']:focus-visible,
+[role='tab']:focus-visible,
+summary:focus-visible,
+[data-toc-popover] button:focus-visible,
+.marfa-fold-button:focus-visible {
   outline-offset: -2px;
 }
+/* The search field sits in a box that is already its own focus indicator. */
 [role='dialog'] input:focus-visible {
   outline: none;
 }

src/styles/visuals.css

@@ -862,7 +862,6 @@
   font-weight: 500;
   font-size: 0.8125rem;
   line-height: 1.25rem;
-  cursor: pointer;
   transition:
     background-color 0.15s,
     border-color 0.15s;
@@ -876,10 +875,6 @@
   background: var(--color-fd-accent);
   color: var(--color-fd-foreground);
 }
-.marfa-ix-button:focus-visible {
-  outline: 2px solid var(--color-fd-ring);
-  outline-offset: 2px;
-}
 .marfa-ix-reset {
   margin-left: auto;
   border-color: transparent;