Improve and simplify style

src/page/image-button/image-button.html.ts

@@ -7,17 +7,13 @@ export const ImageButtonFactory =
     title: string,
     { shouldDownload = false }: { shouldDownload?: boolean } = {}
   ) =>
-  (href: url) =>
-    `
-  <a class="image-button" 
-    href="${href}"
-    rel="noopener"
-    target="_blank"
-    ${shouldDownload ? 'download' : ''}
-  >
-    <div class="svg-container">
-      ${svg}
-    </div>
-    <p>${title}</p>
-  </a>
-`;
+  (href?: url) =>
+    `<a ${href ? `href="${href}"` : ''}
+      class="image-button" tabindex="-1" rel="noopener" target="_blank" ${
+        shouldDownload ? 'download' : ''
+      }>
+      <button>
+        <div class="svg-container">${svg}</div>
+        <p>${title}</p>
+      </button>
+    </a>`;