Style Scrollbar separately in Aluminum

internal/styles/aluminum/aluminum.tss

@@ -143,6 +143,33 @@ $BorderOuterShadow    = #a4afc0                         / 0 1 1 0;
 	MinimumSize: 12;
 }
 
+*.Scrollbar {
+	Border: $BorderEngraved, $BorderGap, $BorderInnerShadow;
+	Color:  $ColorGutter;
+}
+
+*.Scrollbar[focused] {
+	Border: $BorderEngraved, $BorderFocused, $BorderInnerShadow;
+}
+
+*.Scrollbar[hovered] {
+	Color: $ColorGutterHovered;
+}
+
+*.Scrollbar[horizontal] {
+	MinimumSize: 48 0;
+}
+
+*.Scrollbar[vertical] {
+	MinimumSize: 0 48;
+}
+
+*.ScrollbarHandle {
+	Border:      $BorderOuterShadow, $BorderGap, $BorderLifted;
+	Color:       $ColorRaised;
+	MinimumSize: 12;
+}
+
 *.ScrollContainer {
 	Gap: 0;
 }

internal/styles/fallback/wintergreen.go

@@ -263,6 +263,65 @@ rules := []style.Rule {
 		tomo.ATexture(textureHandleHorizontal),
 	), tomo.R("", "SliderHandle"), "horizontal"),
 
+	// *.Scrollbar
+	style.Ru(style.AS (
+		tomo.AttrBorder {
+			outline,
+			tomo.Border {
+				Width: tomo.I(1, 0, 0, 1),
+				Color: borderColorEngraved,
+			},
+		},
+		tomo.AttrColor { Color: colorGutter },
+		tomo.AttrPadding(tomo.I(0, 1, 1, 0)),
+	), tomo.R("", "Scrollbar")),
+	
+	// *.Scrollbar[focused]
+	style.Ru(style.AS (
+		tomo.ABorder (
+			outline,
+			tomo.Border {
+				Width: tomo.I(1),
+				Color: borderColorFocused,
+			}),
+		tomo.APadding(0),
+	), tomo.R("", "Scrollbar"), "focused"),
+	
+	// *.Scrollbar[horizontal]
+	style.Ru(style.AS (
+		tomo.AMinimumSize(48, 0),
+	), tomo.R("", "Scrollbar"), "horizontal"),
+	
+	// *.Scrollbar[vertical]
+	style.Ru(style.AS (
+		tomo.AMinimumSize(0, 48),
+	), tomo.R("", "Scrollbar"), "vertical"),
+
+	// *.ScrollbarHandle
+	style.Ru(style.AS (
+		tomo.ABorder (
+			outline,
+			tomo.Border {
+				Width: tomo.I(1),
+				Color: borderColorLifted,
+			},
+			tomo.Border {
+				Width: tomo.I(1),
+				Color: [4]color.Color {
+					tomo.ColorRaised, tomo.ColorRaised,
+					tomo.ColorRaised, tomo.ColorRaised,
+				},
+			}),
+		tomo.AColor(nil),
+		tomo.ATexture(textureHandleVertical),
+		tomo.AMinimumSize(12, 12),
+	), tomo.R("", "ScrollbarHandle")),
+
+	// *.ScrollbarHandle[horizontal]
+	style.Ru(style.AS (
+		tomo.ATexture(textureHandleHorizontal),
+	), tomo.R("", "ScrollbarHandle"), "horizontal"),
+
 	// *.ScrollContainer
 	style.Ru(style.AS (
 		tomo.AGap(0, 0),