unify heading rules

spearhead/assets/sass/_archive.scss

@@ -1,21 +1,21 @@
 .archive {
 
-    .page-header {
-        line-height: 56px;
-        margin-bottom: 16px;
-    }
+	.page-header {
+		line-height: var(--heading--line-height-h1);
+		margin-bottom: 16px;
+	}
 
-    .page-title {
-        font-size: var(--categories-header--font-size);
-        color: var(--entry-header--color);
-    }
+	.page-title {
+		font-size: var(--heading--font-size-h1);
+		color: var(--entry-header--color);
+	}
 
-    .site-main > article:first-of-type {
-        margin-top: 0;
-    }
+	.site-main > article:first-of-type {
+		margin-top: 0;
+	}
 }
 
 .archive-page-heading {
-    line-height: 2.2em;
-    margin-bottom: 5px;
+	line-height: 2.2em;
+	margin-bottom: 5px;
 }

spearhead/style-rtl.css

@@ -288,12 +288,12 @@ Tags: one-column, flexible-header, accessibility-ready, custom-colors, custom-me
 }
 
 .archive .page-header {
-	line-height: 56px;
+	line-height: var(--heading--line-height-h1);
 	margin-bottom: 16px;
 }
 
 .archive .page-title {
-	font-size: var(--categories-header--font-size);
+	font-size: var(--heading--font-size-h1);
 	color: var(--entry-header--color);
 }
 

spearhead/style.css

@@ -288,12 +288,12 @@ Tags: one-column, flexible-header, accessibility-ready, custom-colors, custom-me
 }
 
 .archive .page-header {
-	line-height: 56px;
+	line-height: var(--heading--line-height-h1);
 	margin-bottom: 16px;
 }
 
 .archive .page-title {
-	font-size: var(--categories-header--font-size);
+	font-size: var(--heading--font-size-h1);
 	color: var(--entry-header--color);
 }