✨ Implemented border function

themes/linear/linear.typ

@@ -9,6 +9,46 @@
   *Linear Cover*
 ]
 
+#let border(x, y) = {
+  set line(stroke: 1.5pt)
+  let borderTL = 0% + 30%
+  let borderTR = 100% - 30%
+  place(
+    // Left border line
+    line(start: (0% + x, 5%), end: (0% + x, 90%))
+  )
+  place(
+    // Right border line
+    line(start: (100% - x, 5%), end: (100% - x, 90%))
+  )
+  place(
+    // Bottom border line
+    line(start: (0% + x, 100% - y), end: (100% - x, 100% - y))
+  )
+  place(
+    // Top left border line -> ——
+    line(start: (0% + x, 5%), end: (borderTL + x, 5%))
+  )
+  place(
+    // Top right border line -> ——
+    line(start: (100% - x, 5%), end: (borderTR - x, 5%))
+  )
+  place(
+    // Top left border line -> ︱
+    line(start: (borderTL + x, 4%), end: (borderTL + x, 6%))
+  )
+  place(
+    // Top left border line -> ︱
+    line(start: (borderTR - x, 4%), end: (borderTR - x, 6%))
+  )
+}
+
+#let heading(context: (:)) = {
+  box(inset: 0.5em, fill: red)[context]
+  h(5pt)
+  box(baseline: -10pt, width: 1fr, line(length: 100%))
+}
+
 #let toc() = {
   utils.print_toc(context => [
     #context.title
@@ -24,23 +64,40 @@
 }
 
 #let frontmatter_entry(context: (:), body) = {
-  show: page.with(header: [ = Frontmatter header ], footer: [Frontmatter footer])
-
+  show: page.with(
+    header: [ 
+      #set align(center)
+      = Frontmatter header 
+      ],
+    footer: [ Frontmatter footer ],
+    background: border(5%, 10%)
+    )
   body
 }
 
 #let body_entry(context: (:), body) = {
-  show: page.with(header: [ = Body header ], footer: [Body footer])
-
+  show: page.with(
+    header: [ 
+      #set align(center) 
+      = Body header 
+      ], 
+    footer: [ Body footer ],
+    background: border(5%, 10%) 
+    )
   body
 }
 #let appendix_entry(context: (:), body) = {
-  show: page.with(header: [ = Appendix header ], footer: [Appendix footer])
-
+  show: page.with(header: [
+    #set align(center)
+    = Appendix header 
+    ], 
+    footer: [ Appendix footer ],
+    background: border(5%, 10%)
+    )
   body
 }
 
-#let default_theme = (
+#let linear_theme = (
   // Global show rules
   rules: rules, cover: cover,
   // Entry pages