Fix buttons in mobile

main.css

@@ -78,12 +78,14 @@ button#helpButton:after {
 button#helpButton {
   position:  absolute;
   right: 0;
+  height: 2em;
   transform: scale(0.7);
 }
 
 button#shareButton {
   position:  absolute;
-  right: 1.5em;
+  right: 1.3em;
+  height: 2em;
   font-weight: bold;
   letter-spacing: -3px;
   transform: scale(0.7);
@@ -91,7 +93,10 @@ button#shareButton {
 
 button#downloadButton {
   position: absolute;
-  right: 3em;
+  right: 2.65em;
+  height: 2em;
+  padding-left: 0.5em;
+  padding-right: 0.5em;
   text-align: center;
   text-decoration: underline;
   transform: scale(0.7);
@@ -101,6 +106,7 @@ button#downloadButton {
   width: 30%;
   margin: 0 auto;
   min-width: 400px;
+  max-width: 100%;
   position: relative;
 }