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+### Focus Within
+
+Changes the appearance of a form if any of its children are focused.
+
+#### HTML
+
+```html
+<div class="focus-within">
+  <form>
+    <label for="given_name">Given Name:</label>
+    <input id="given_name" type="text">
+    <br>
+    <label for="family_name">Family Name:</label>
+    <input id="family_name" type="text">
+  </form>
+</div>
+```
+
+#### CSS
+
+```css
+form {
+  border: 3px solid #2d98da;
+  color:  #000000;
+  padding: 4px;
+}
+
+form:focus-within {
+  background: #f7b731;
+  color: #000000;
+}
+```
+
+#### Demo
+
+<!-- Leave this blank, the build script will generate the demo for you. -->
+
+#### Explanation
+
+The psuedo class `:focus-within` applies styles to a parent element if any child element gets focused. For example, an `input` element inside a `form` element.
+
+#### Browser support
+
+<span class="snippet__support-note">⚠️ Not supported in IE11 or the current version of Edge.</span>
+
+<!-- Whenever possible, link a `caniuse` feature which allows the browser support percentage to be displayed.
+If no link is provided, it defaults to 99+%. -->
+
+- https://caniuse.com/#feat=css-focus-within
+
+<!-- tags: visual, interactivity -->