style default button

functions.php

@@ -8,3 +8,21 @@ function custom_stylesheet() {
 }
 
 add_action( 'wp_enqueue_scripts', 'custom_stylesheet' );
+
+add_action( 'init', 'lex_scotland_block_styles');
+
+function lex_scotland_block_styles() {
+	register_block_style( 'core/button', array(
+		'name'         => 'thin',
+		'label'        => __( 'Thin', 'lex-scotland' ),
+        'inline_style' => '
+            .wp-block-button.is-style-thin .wp-element-button {
+                padding: 8px 16px;
+                background: var(--wp--preset--color--light-green);
+                color: var(--wp--preset--color--contrast);
+                border-radius: 0;
+                font-size: var(--wp--preset--font-size--small);
+            }
+        '
+    ) );
+}

theme.json

@@ -296,6 +296,11 @@
       },
       "core/button": {
         "variations": {
+          "fill": {
+            "color": {
+              "background": "var(--wp--preset--color--main-purple)"
+            }
+          },
           "outline": {
             "color": {
               "background": "#E8BFE2",