diff --git a/src/main/resources/static/main.css b/src/main/resources/static/main.css
index 0711eca..ece21e9 100644
--- a/src/main/resources/static/main.css
+++ b/src/main/resources/static/main.css
@@ -4,7 +4,7 @@
     --text-color: #dbdbdb;
     --pad-datasets: 1rem;
     --pad-main: 2rem;
-    --min-card-size: 60ch;
+    --min-card-size: min(60ch, 33vw);
     --corner-radius: 1rem;
     font-size: 12pt;
     font-family: sans-serif;
@@ -49,6 +49,9 @@ header {
     gap: .5rem;
     background-color: var(--fg-color, darkgrey);
     padding: .5rem 1rem;
+    margin-bottom: var(--pad-datasets);
+    margin-left: var(--pad-datasets);
+    margin-right: var(--pad-datasets);
     border-radius: 1.5rem;
 }
 
@@ -69,14 +72,14 @@ header {
     gap: 1rem;
 }
 
-@container (width < 80ch) {
+@container (width < 60ch) {
     .datasets {
         grid-template-columns: 1fr;
     }
 }
 
 .dataset {
-    padding: 1rem 2rem;
+    padding: var(--pad-datasets) 2rem;
     background-color: var(--fg-color, darkgrey);
     border-radius: var(--corner-radius);
     list-style: none;
@@ -136,10 +139,18 @@ header {
     background-color: var(--bg-color);
 }
 
-:is(.upvote-btn, .downvote-btn, #search-btn, #filter-btn, #sort-btn, #add-btn):is(:hover, :focus-visible) {
+#add-btn:is(:hover, :focus-visible) {
+    filter: brightness(1.2);
+}
+
+#add-btn:active {
+    filter: brightness(1.3);
+}
+
+.btn:is(:hover, :focus-visible) {
     filter: brightness(1.5);
 }
 
-:is(.upvote-btn, .downvote-btn, #search-btn, #filter-btn, #sort-btn, #add-btn):active {
+.btn:active {
     filter: brightness(1.75);
 }
diff --git a/src/main/resources/templates/index.html b/src/main/resources/templates/index.html
index 172c714..2ac398e 100644
--- a/src/main/resources/templates/index.html
+++ b/src/main/resources/templates/index.html
@@ -7,7 +7,7 @@
     <link rel="stylesheet" href="main.css">
 </head>
 <body>
-    <div onclick="console.log('add')" id="add-btn"></div>
+    <div onclick="console.log('add')" id="add-btn" title="Add a new API entry"></div>
     <main>
         <header>
             <h1>Welcome to DataDash</h1>
@@ -15,12 +15,12 @@
         </header>
 
         <section id="tool-bar">
-            <select id="sort-btn">Sort by
+            <select id="sort-btn" title="Sort entries">Sort by
                 <option>Option 1</option>
                 <option>Option 2</option>
             </select>
             <div class="divider"></div>
-            <select id="filter-btn">Filter
+            <select class="btn" id="filter-btn" title="Filter entries">Filter
                 <optgroup label="Standard categories">
                     <option>Option 1</option>
                     <option>Option 2</option>
@@ -30,7 +30,7 @@
                 </optgroup>
             </select>
             <input type="search" name="query" id="search-entry" placeholder="Search">
-            <button id="search-btn">Search</button>
+            <button class="btn" id="search-btn" title="Search entries">Search</button>
         </section>
 
         <section id="recents">
@@ -46,9 +46,9 @@
                         </div>
                     </div>
                     <aside class="upvote">
-                        <button class="upvote-btn">Upvote</button>
+                        <button class="upvote-btn btn">Upvote</button>
                         <span class="upvote-count">0</span>
-                        <button class="downvote-btn">Downvote</button>
+                        <button class="downvote-btn btn">Downvote</button>
                     </aside>
                 </li>
                 <li class="dataset">
@@ -60,9 +60,9 @@
                         </div>
                     </div>
                     <aside class="upvote">
-                        <button class="upvote-btn">Upvote</button>
+                        <button class="upvote-btn btn">Upvote</button>
                         <span class="upvote-count">0</span>
-                        <button class="downvote-btn">Downvote</button>
+                        <button class="downvote-btn btn">Downvote</button>
                     </aside>
                 </li>
                 <li class="dataset">
@@ -74,9 +74,9 @@
                         </div>
                     </div>
                     <aside class="upvote">
-                        <button class="upvote-btn">Upvote</button>
+                        <button class="upvote-btn btn">Upvote</button>
                         <span class="upvote-count">0</span>
-                        <button class="downvote-btn">Downvote</button>
+                        <button class="downvote-btn btn">Downvote</button>
                     </aside>
                 </li>
                 <li class="dataset">
@@ -88,9 +88,9 @@
                         </div>
                     </div>
                     <aside class="upvote">
-                        <button class="upvote-btn">Upvote</button>
+                        <button class="upvote-btn btn">Upvote</button>
                         <span class="upvote-count">0</span>
-                        <button class="downvote-btn">Downvote</button>
+                        <button class="downvote-btn btn">Downvote</button>
                     </aside>
                 </li>
                 <li class="dataset">
@@ -102,9 +102,9 @@
                         </div>
                     </div>
                     <aside class="upvote">
-                        <button class="upvote-btn">Upvote</button>
+                        <button class="upvote-btn btn">Upvote</button>
                         <span class="upvote-count">0</span>
-                        <button class="downvote-btn">Downvote</button>
+                        <button class="downvote-btn btn">Downvote</button>
                     </aside>
                 </li>
             </ul>
@@ -121,9 +121,9 @@
                         </div>
                     </div>
                     <aside class="upvote">
-                        <button class="upvote-btn">Upvote</button>
+                        <button class="upvote-btn btn">Upvote</button>
                         <span class="upvote-count">0</span>
-                        <button class="downvote-btn">Downvote</button>
+                        <button class="downvote-btn btn">Downvote</button>
                     </aside>
                 </li>
             </ul>
