style separator block

theme.json

@@ -53,13 +53,13 @@
 				{
 					"name": "Small",
 					"size": "16px",
-					"slug": "sm",
+					"slug": "small",
 					"fluid": false
 				},
 				{
 					"name": "Medium",
 					"size": "20px",
-					"slug": "md",
+					"slug": "medium",
 					"fluid": {
 						"min": "18px",
 						"max": "20px"
@@ -68,7 +68,7 @@
 				{
 					"name": "Large",
 					"size": "40px",
-					"slug": "lg",
+					"slug": "large",
 					"fluid": {
 						"min": "32px",
 						"max": "40px"
@@ -77,7 +77,7 @@
         {
           "name": "Extra Large",
           "size": "48px",
-          "slug": "xl",
+          "slug": "x-large",
           "fluid": {
             "min": "40px",
             "max": "48px"
@@ -260,10 +260,20 @@
           "style": "solid"
         },
         "typography": {
-          "fontSize": "var(--wp--preset--font-size--sm)",
+          "fontSize": "var(--wp--preset--font-size--small)",
           "textTransform": "uppercase"
         }
-      }
+      },
+      "core/separator": {
+				"border": {
+					"color": "currentColor",
+					"style": "solid",
+					"width": "0 0 1px 0"
+				},
+				"color": {
+					"text": "var(--wp--preset--color--main-green)"
+				}
+			}
     },
     "elements": {
       "h1": {