diff --git a/internal/ui/render.go b/internal/ui/render.go
index 9374319..02675ab 100644
--- a/internal/ui/render.go
+++ b/internal/ui/render.go
@@ -259,17 +259,19 @@ func (r *Renderer) drawLineText(gtx layout.Context, shp *text.Shaper, x, y unit.
 }
 
 // drawLine draws a line of glyphs using shaper.Shape() and shaper.Bitmaps().
+// Matches Gio's paintGlyph exactly: offset by (x + first.X, y + first.Y).
 func (r *Renderer) drawLine(gtx layout.Context, shp *text.Shaper, line []text.Glyph, x, y unit.Dp, col color.NRGBA) {
 	if len(line) == 0 {
 		return
 	}
 	first := line[0]
 	// shaper.Shape(line) returns a path where glyph positions are relative to
-	// the first glyph (first.X == 0 in the returned path). So we offset by
-	// (x, y) and let the shaper handle the rest.
-	// first.Y is the baseline; we subtract it so the top of the text is at y.
-	offX := float32(gtx.Dp(x))
-	offY := float32(gtx.Dp(y)) - float32(first.Y)
+	// the first glyph. Offset by (x + first.X, y + first.Y) to place the line
+	// at the desired document position. Matches Gio's paintGlyph:
+	//   lineOff = (glyph.X, glyph.Y) - viewport.Min
+	//   op.Affine(f32.Affine2D{}.Offset(lineOff))
+	offX := float32(gtx.Dp(x)) + float32(first.X)/64.0
+	offY := float32(gtx.Dp(y)) + float32(first.Y)
 	t := op.Affine(f32.Affine2D{}.Offset(f32.Pt(offX, offY))).Push(gtx.Ops)
 
 	// Draw vector glyphs