minor style improvements

src/sequence.typ

@@ -120,7 +120,7 @@
     let m = measure(box(par.display-name))
     let f = if i1 > i2 {-1} else {1}
     end-info.x -= (m.width + PAR-PAD.last() * 2) / 2pt * f
-    shapes += participant.render(x-pos, par, y: y)
+    shapes += participant.render(x-pos, par, y: y - CREATE-OFFSET)
   }
 
   end-info.ll-lvl = lifelines.at(i2).level * LIFELINE-W / 2
@@ -146,11 +146,13 @@
   let style = (
     mark: (
       start: get-arrow-marks(elmt.start-tip, elmt.color),
-      end: get-arrow-marks(elmt.end-tip, elmt.color)
+      end: get-arrow-marks(elmt.end-tip, elmt.color),
+      scale: 1.2
     ),
     stroke: (
-      dash: if elmt.dashed {"dashed"} else {"solid"},
-      paint: elmt.color
+      dash: if elmt.dashed {(2pt,2pt)} else {"solid"},
+      paint: elmt.color,
+      thickness: .5pt
     )
   )
 
@@ -217,6 +219,7 @@
     lifelines.at(i2) = dst-line
   }
   if elmt.create-dst {
+    y -= CREATE-OFFSET
     let dst-line = lifelines.at(i2)
     dst-line.lines.push(("create", y))
     lifelines.at(i2) = dst-line