Index: src/wp-content/themes/twentynineteen/sass/blocks/_blocks.scss
===================================================================
--- src/wp-content/themes/twentynineteen/sass/blocks/_blocks.scss	(revision 45256)
+++ src/wp-content/themes/twentynineteen/sass/blocks/_blocks.scss	(working copy)
@@ -741,40 +741,23 @@
 	//! Columns
 	.wp-block-columns {
 
-		&.alignfull {
-			padding-left: $size__spacing-unit;
-			padding-right: $size__spacing-unit;
-		}
+		.wp-block-column > * {
 
-		@include media(mobile) {
-			flex-wrap: nowrap;
+			&:first-child {
+				margin-top: 0;
+			}
+
+			&:last-child {
+				margin-bottom: 0;
+			}
 		}
 
 		@include media(tablet) {
-			.wp-block-column > * {
+			flex-wrap: nowrap;
 
-				&:first-child {
-					margin-top: 0;
-				}
-
-				&:last-child {
-					margin-bottom: 0;
-				}
+			.wp-block-column:not(:first-child) {
+				margin-left: 32px;
 			}
-
-			&[class*='has-'] > * {
-				margin-right: $size__spacing-unit;
-
-				&:last-child {
-					margin-right: 0;
-				}
-			}
-
-			&.alignfull,
-			&.alignfull .wp-block-column {
-				padding-left: calc(2 * #{$size__spacing-unit});
-				padding-right: calc(2 * #{$size__spacing-unit});
-			}
 		}
 	}
 
Index: src/wp-content/themes/twentynineteen/style-rtl.css
===================================================================
--- src/wp-content/themes/twentynineteen/style-rtl.css	(revision 45256)
+++ src/wp-content/themes/twentynineteen/style-rtl.css	(working copy)
@@ -6002,35 +6002,21 @@
   word-break: break-word;
 }
 
-.entry .entry-content .wp-block-columns.alignfull {
-  padding-right: 1rem;
-  padding-left: 1rem;
+.entry .entry-content .wp-block-columns .wp-block-column > *:first-child {
+  margin-top: 0;
 }
 
-@media only screen and (min-width: 600px) {
-  .entry .entry-content .wp-block-columns {
-    flex-wrap: nowrap;
-  }
+.entry .entry-content .wp-block-columns .wp-block-column > *:last-child {
+  margin-bottom: 0;
 }
 
 @media only screen and (min-width: 768px) {
-  .entry .entry-content .wp-block-columns .wp-block-column > *:first-child {
-    margin-top: 0;
+  .entry .entry-content .wp-block-columns {
+    flex-wrap: nowrap;
   }
-  .entry .entry-content .wp-block-columns .wp-block-column > *:last-child {
-    margin-bottom: 0;
+  .entry .entry-content .wp-block-columns .wp-block-column:not(:first-child) {
+    margin-right: 32px;
   }
-  .entry .entry-content .wp-block-columns[class*='has-'] > * {
-    margin-left: 1rem;
-  }
-  .entry .entry-content .wp-block-columns[class*='has-'] > *:last-child {
-    margin-left: 0;
-  }
-  .entry .entry-content .wp-block-columns.alignfull,
-  .entry .entry-content .wp-block-columns.alignfull .wp-block-column {
-    padding-right: calc(2 * 1rem);
-    padding-left: calc(2 * 1rem);
-  }
 }
 
 .entry .entry-content .wp-block-latest-comments .wp-block-latest-comments__comment-meta {
Index: src/wp-content/themes/twentynineteen/style.css
===================================================================
--- src/wp-content/themes/twentynineteen/style.css	(revision 45256)
+++ src/wp-content/themes/twentynineteen/style.css	(working copy)
@@ -6014,35 +6014,21 @@
   word-break: break-word;
 }
 
-.entry .entry-content .wp-block-columns.alignfull {
-  padding-left: 1rem;
-  padding-right: 1rem;
+.entry .entry-content .wp-block-columns .wp-block-column > *:first-child {
+  margin-top: 0;
 }
 
-@media only screen and (min-width: 600px) {
-  .entry .entry-content .wp-block-columns {
-    flex-wrap: nowrap;
-  }
+.entry .entry-content .wp-block-columns .wp-block-column > *:last-child {
+  margin-bottom: 0;
 }
 
 @media only screen and (min-width: 768px) {
-  .entry .entry-content .wp-block-columns .wp-block-column > *:first-child {
-    margin-top: 0;
+  .entry .entry-content .wp-block-columns {
+    flex-wrap: nowrap;
   }
-  .entry .entry-content .wp-block-columns .wp-block-column > *:last-child {
-    margin-bottom: 0;
+  .entry .entry-content .wp-block-columns .wp-block-column:not(:first-child) {
+    margin-left: 32px;
   }
-  .entry .entry-content .wp-block-columns[class*='has-'] > * {
-    margin-right: 1rem;
-  }
-  .entry .entry-content .wp-block-columns[class*='has-'] > *:last-child {
-    margin-right: 0;
-  }
-  .entry .entry-content .wp-block-columns.alignfull,
-  .entry .entry-content .wp-block-columns.alignfull .wp-block-column {
-    padding-left: calc(2 * 1rem);
-    padding-right: calc(2 * 1rem);
-  }
 }
 
 .entry .entry-content .wp-block-latest-comments .wp-block-latest-comments__comment-meta {