asset/scss/components/_buttons.scss

@@ -1,3 +1,6 @@
+button {
+  @extend .button;
+}
 button,.button {
   &.small{
     padding: $global-padding*0.5 $global-padding*1.5;
@@ -58,3 +61,6 @@ button,.button {
     border: none;
   }
 }
+.end_of_page_button {
+  @extend .button.small;
+}

asset/scss/global/_omeka.scss

@@ -79,6 +79,12 @@ body:not(.browse) #content {
   border-top: none;
 }
 
+// vertical spacing for bloc elements
+//
+.archive-item-block {
+  margin-bottom: $global-margin * 1;
+}
+
 /* Styles for vertical menu layout */
 
 body.vertical-menu {