improve search grid styles

docs/assets/scripts/filter.js

@@ -1,3 +1,11 @@
+function debounce(func, wait) {
+  let timeout;
+  return function (...args) {
+    clearTimeout(timeout);
+    timeout = setTimeout(() => func.apply(this, args), wait);
+  };
+}
+
 function updateResults(input) {
   const filter = input.value.toLowerCase().trim();
   let filtered = Boolean(filter);
@@ -18,8 +26,10 @@ function updateResults(input) {
   }
 }
 
+const debouncedUpdateResults = debounce(updateResults, 300);
+
 document.documentElement.addEventListener('input', e => {
   if (e.target?.matches('#block-filter wa-input')) {
-    updateResults(e.target);
+    debouncedUpdateResults(e.target);
   }
 });

docs/assets/styles/docs.css

@@ -370,10 +370,22 @@ wa-page > main:has(> .index-grid) {
 
 .index-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(min(22ch, 100%), 1fr));
+  grid-template-columns: repeat(4, 1fr);
   gap: var(--wa-space-2xl);
   margin-block-end: var(--wa-space-3xl);
 
+  @media screen and (max-width: 1470px) {
+    grid-template-columns: repeat(3, 1fr);
+  }
+
+  @media screen and (max-width: 960px) {
+    grid-template-columns: repeat(2, 1fr);
+  }
+
+  @media screen and (max-width: 500px) {
+    grid-template-columns: repeat(1, 1fr);
+  }
+
   a {
     border-radius: var(--wa-border-radius-l);
     text-decoration: none;