Answer stability round 1: 0 🔴, 1 🟡 (0 misread); the order test requires both base rules, a chip's dot goes where the native box shows

public/css/styles.css

@@ -478,13 +478,15 @@ span.nav-self { cursor: default; }                 /* static / non-clickable */
   .chip:has(input:focus-visible) { outline: 2px solid var(--focus); outline-offset: 1px; }
 }
 
-/* Without :has() every branch is open and every theme rule is inert: neither control does anything.
+/* Without :has() every nav branch stays open and no theme rule applies, so the disclosure toggles and
-   The filter inputs stay visible, since the native control is then the only sign of a choice or of
+   the theme switch are hidden. The filter inputs are shown instead: the native control is then the
-   focus. After the base rules, since @supports adds no specificity. */
+   only sign of a choice or of focus, and the dot goes, since it would stay grey beside a ticked box. This block must come
+   after the base rules, since @supports adds no specificity. */
 @supports not selector(:has(a)) {
   .nav-disc { visibility: hidden; }  /* keeps its width, so the labels stay aligned */
   .theme-switch { display: none; }
   .segmented input, .chip input { position: static; opacity: 1; margin: 0; }
+  .chip .chip-dot { display: none; }
 }
 
 /* date range */

src/ui/stylesheet-floor.test.ts

@@ -153,16 +153,16 @@ test("styles.css hides the theme switch and the nav toggles where :has() is miss
   assert.match(block, /\.nav-disc\s*\{\s*visibility:\s*hidden/);
 });
 
-// Both inputs are invisible in the base rules and only a `:has()` rule marks the choice, so without
-// `:has()` the native control is the only sign of what is selected or focused.
 test("styles.css shows the segmented and chip inputs where :has() is missing, after their base rules", () => {
   const guard = stylesheet.indexOf("@supports not selector(:has(a)) {");
   assert.ok(guard >= 0, "no @supports not selector(:has(a)) block");
   const block = stylesheet.slice(guard, blockEnd(guard));
   for (const input of [".segmented input", ".chip input"]) {
-    assert.ok(stylesheet.indexOf(`${input} {`) < guard, `the base ${input} rule comes after the guard`);
+    const base = stylesheet.indexOf(`${input} {`);
+    assert.ok(base >= 0 && base < guard, `the base ${input} rule is missing or comes after the guard`);
   }
   assert.match(block, /\.segmented input,\s*\.chip input\s*\{[^}]*position:\s*static[^}]*opacity:\s*1/);
+  assert.match(block, /\.chip \.chip-dot\s*\{\s*display:\s*none/);
 });
 
 // Without `:has()` nothing reads #nav-toggle, so an off-canvas sidebar there is unreachable and the