diff --git a/apps/web/package.json b/apps/web/package.json
index 61bbb0d14..6bd361a9c 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -34,6 +34,7 @@
 		"@dnd-kit/sortable": "^10.0.0",
 		"@dnd-kit/utilities": "^3.2.2",
 		"@fontsource-variable/manrope": "^5.3.0",
+		"@lezer/highlight": "^1.2.4",
 		"@lingui/core": "^6.8.0",
 		"@lingui/react": "^6.8.0",
 		"@orpc/client": "^1.15.4",
diff --git a/apps/web/src/features/resume/stylesheet/editor.tsx b/apps/web/src/features/resume/stylesheet/editor.tsx
index c8830710a..2d55afd11 100644
--- a/apps/web/src/features/resume/stylesheet/editor.tsx
+++ b/apps/web/src/features/resume/stylesheet/editor.tsx
@@ -6,7 +6,7 @@ import type { SemanticCssColorToken } from "./color-tokens";
 import type { SemanticCssEditorMetadata } from "./protocol";
 import { defaultKeymap, indentWithTab } from "@codemirror/commands";
 import { css } from "@codemirror/lang-css";
-import { defaultHighlightStyle, syntaxHighlighting } from "@codemirror/language";
+import { HighlightStyle, syntaxHighlighting } from "@codemirror/language";
 import { Annotation, Compartment, EditorState, Prec, Transaction } from "@codemirror/state";
 import {
 	drawSelection,
@@ -16,6 +16,7 @@ import {
 	keymap,
 	lineNumbers,
 } from "@codemirror/view";
+import { tags } from "@lezer/highlight";
 import { t } from "@lingui/core/macro";
 import { Trans } from "@lingui/react/macro";
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
@@ -54,6 +55,18 @@ type EditorCompartments = {
 	intelligence: Compartment;
 };
 
+/** CSS in the app's own inks, so it reads the same in light and dark. */
+const highlightStyle = HighlightStyle.define([
+	{ tag: [tags.comment, tags.meta], color: "var(--ink-3)", fontStyle: "italic" },
+	{ tag: [tags.tagName, tags.className, tags.labelName], color: "var(--accent-text)" },
+	{ tag: [tags.propertyName, tags.attributeName], color: "var(--info-text)" },
+	{ tag: [tags.string, tags.number, tags.unit, tags.color, tags.atom], color: "var(--warn-text)" },
+	{ tag: [tags.keyword, tags.modifier, tags.definitionKeyword, tags.controlKeyword], color: "var(--danger-text)" },
+	{ tag: [tags.variableName, tags.function(tags.variableName)], color: "var(--ink)", fontWeight: "500" },
+	{ tag: [tags.punctuation, tags.operator, tags.bracket], color: "var(--ink-2)" },
+	{ tag: tags.invalid, color: "var(--danger-text)", textDecoration: "underline wavy" },
+]);
+
 const editorTheme = (dark: boolean): Extension =>
 	EditorView.theme(
 		{
@@ -65,7 +78,7 @@ const editorTheme = (dark: boolean): Extension =>
 			},
 			".cm-scroller": {
 				overflow: "auto",
-				fontFamily: '"JetBrains Mono Variable", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace',
+				fontFamily: "var(--font-mono)",
 				lineHeight: "1.5",
 			},
 			".cm-content": { minHeight: "100%", padding: "0.75rem 0" },
@@ -162,7 +175,7 @@ export function StylesheetCodeEditor({
 				drawSelection(),
 				highlightActiveLine(),
 				css(),
-				syntaxHighlighting(defaultHighlightStyle, { fallback: true }),
+				syntaxHighlighting(highlightStyle),
 				EditorView.editorAttributes.of({ dir: "ltr" }),
 				EditorView.contentAttributes.of({ "aria-label": initial.label, dir: "ltr", spellcheck: "false" }),
 				Prec.high(
diff --git a/apps/web/src/features/resume/stylesheet/legacy-banner.tsx b/apps/web/src/features/resume/stylesheet/legacy-banner.tsx
index 8934da52c..e5160df5d 100644
--- a/apps/web/src/features/resume/stylesheet/legacy-banner.tsx
+++ b/apps/web/src/features/resume/stylesheet/legacy-banner.tsx
@@ -21,7 +21,7 @@ export function LegacyStylesheetBanner({ disabled, onActivate }: LegacyStyleshee
 				</p>
 				<Button type="button" size="sm" disabled={disabled} onClick={onActivate}>
 					<Trans>Activate Semantic CSS</Trans>
-					<Icon name="arrow_forward" size={16} data-icon="inline-end" />
+					<Icon name="arrow_forward" size={16} />
 				</Button>
 			</AlertDescription>
 		</Alert>
diff --git a/apps/web/src/features/resume/stylesheet/status.tsx b/apps/web/src/features/resume/stylesheet/status.tsx
index 70acafc6b..11e93d3e0 100644
--- a/apps/web/src/features/resume/stylesheet/status.tsx
+++ b/apps/web/src/features/resume/stylesheet/status.tsx
@@ -23,19 +23,19 @@ export function StylesheetStatus({ mode, status, diagnostics }: StylesheetStatus
 		<div className="space-y-2" aria-live="polite">
 			{hasFatalErrors ? (
 				<Badge variant="danger">
-					<Icon name="error" size={16} data-icon="inline-start" />
+					<Icon name="error" size={16} />
 					<Trans>Fatal error</Trans>
 				</Badge>
 			) : isPending ? (
 				<Badge variant="outline">{mode === "legacy" ? <Trans>Checking draft</Trans> : <Trans>Checking</Trans>}</Badge>
 			) : hasRecoverableErrors ? (
 				<Badge variant="warn">
-					<Icon name="error" size={16} data-icon="inline-start" />
+					<Icon name="error" size={16} />
 					{mode === "legacy" ? <Trans>Ready to activate with errors</Trans> : <Trans>Valid with errors</Trans>}
 				</Badge>
 			) : warnings.length > 0 ? (
 				<Badge variant="warn">
-					<Icon name="warning" size={16} data-icon="inline-start" />
+					<Icon name="warning" size={16} />
 					{mode === "legacy" ? <Trans>Ready to activate with warnings</Trans> : <Trans>Valid with warnings</Trans>}
 				</Badge>
 			) : (
diff --git a/apps/web/src/features/resume/stylesheet/toolbar.tsx b/apps/web/src/features/resume/stylesheet/toolbar.tsx
index 90b73022f..fe734b66f 100644
--- a/apps/web/src/features/resume/stylesheet/toolbar.tsx
+++ b/apps/web/src/features/resume/stylesheet/toolbar.tsx
@@ -52,23 +52,19 @@ export function StylesheetToolbar({
 	return (
 		<div className="flex flex-wrap items-center gap-1" role="toolbar" aria-label={t`Stylesheet editor`}>
 			<ToolbarButton label={t`Undo stylesheet edit`} disabled={disabled || !canUndo} onClick={onUndo}>
-				<Icon name="undo" size={16} data-icon="inline-start" />
+				<Icon name="undo" size={16} />
 			</ToolbarButton>
 			<ToolbarButton label={t`Redo stylesheet edit`} disabled={disabled || !canRedo} onClick={onRedo}>
-				<Icon name="redo" size={16} data-icon="inline-start" />
+				<Icon name="redo" size={16} />
 			</ToolbarButton>
 			<ToolbarButton label={t`Copy stylesheet`} onClick={() => void copySourceToClipboard(source)}>
-				<Icon name="content_copy" size={16} data-icon="inline-start" />
+				<Icon name="content_copy" size={16} />
 			</ToolbarButton>
 			<ToolbarButton label={t`Format stylesheet`} disabled={disabled} onClick={onFormat}>
-				<Icon name="auto_fix_high" size={16} data-icon="inline-start" />
+				<Icon name="auto_fix_high" size={16} />
 			</ToolbarButton>
 			<ToolbarButton label={focused ? t`Exit focus mode` : t`Open focus mode`} onClick={onFocusToggle}>
-				{focused ? (
-					<Icon name="close_fullscreen" size={16} data-icon="inline-start" />
-				) : (
-					<Icon name="open_in_full" size={16} data-icon="inline-start" />
-				)}
+				{focused ? <Icon name="close_fullscreen" size={16} /> : <Icon name="open_in_full" size={16} />}
 			</ToolbarButton>
 		</div>
 	);
diff --git a/packages/ui/src/components/icon.test.tsx b/packages/ui/src/components/icon.test.tsx
index 56d212a9b..42c2c4e6c 100644
--- a/packages/ui/src/components/icon.test.tsx
+++ b/packages/ui/src/components/icon.test.tsx
@@ -19,6 +19,11 @@ describe("Icon", () => {
 		expect(container.querySelector("button")).toHaveTextContent(/^Search$/);
 	});
 
+	it("keeps its glyph when a caller passes its own data-icon", () => {
+		const { container } = render(<Icon name="undo" {...{ "data-icon": "inline-start" }} />);
+		expect(container.querySelector('[data-slot="icon"]')).toHaveAttribute("data-icon", "undo");
+	});
+
 	it("uses the filled glyph only when asked", () => {
 		const { container } = render(<Icon name="description" filled />);
 		expect(container.querySelector('[data-slot="icon"]')?.getAttribute("style")).toContain('"FILL" 1');
diff --git a/packages/ui/src/components/icon.tsx b/packages/ui/src/components/icon.tsx
index 0102ffbd3..8e2398fef 100644
--- a/packages/ui/src/components/icon.tsx
+++ b/packages/ui/src/components/icon.tsx
@@ -29,6 +29,8 @@ function Icon({ name, filled = false, size = 20, className, style, ...props }: I
 		<span
 			aria-hidden="true"
 			translate="no"
+			{...props}
+			// After the props: `data-icon` is the glyph, so a stray one never blanks it.
 			data-slot="icon"
 			data-icon={name}
 			className={cn("material-symbol", DIRECTIONAL_ICONS.has(name) && "rtl:-scale-x-100", className)}
@@ -37,7 +39,6 @@ function Icon({ name, filled = false, size = 20, className, style, ...props }: I
 				fontVariationSettings: `"FILL" ${filled ? 1 : 0}, "wght" 300, "GRAD" 0, "opsz" ${size >= 24 ? 24 : 20}`,
 				...style,
 			}}
-			{...props}
 		/>
 	);
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 02c7f61f6..aaab17ffb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -549,6 +549,9 @@ importers:
       '@fontsource-variable/manrope':
         specifier: ^5.3.0
         version: 5.3.0
+      '@lezer/highlight':
+        specifier: ^1.2.4
+        version: 1.2.4
       '@lingui/core':
         specifier: ^6.8.0
         version: 6.8.0(@babel/core@8.0.6)(babel-plugin-macros@3.1.0)