Less button height (some devices need that)

index.html

@@ -29,7 +29,7 @@
             </button>
           </div>
         </div>
-        <div class="row mb-3" style="height: 35vh">
+        <div class="row mb-3" style="height: 30vh">
           <div class="col-6">
             <button onclick="playSound('maayan-tsadka-an-audio-guide-to-ocupation-part-1-a.mp3')" class="btn btn-secondary text-center w-100 h-100" style="padding-top:0; vertical-align:top">
               <h3>
@@ -50,7 +50,7 @@
             </button>
           </div>
         </div>
-        <div class="row mb-3" style="height: 35vh">
+        <div class="row mb-3" style="height: 30vh">
           <div class="col-6">
             <button onclick="playSound('maayan-tsadka-an-audio-guide-to-ocupation-part-1-c.mp3')" class="btn btn-secondary text-center w-100 h-100" style="padding-top:0; vertical-align:top">
               <h3>