diff --git a/packages/studio/src/components/editor/propertyPanelFlatTextSection.tsx b/packages/studio/src/components/editor/propertyPanelFlatTextSection.tsx
new file mode 100644
index 000000000..dde867a46
--- /dev/null
+++ b/packages/studio/src/components/editor/propertyPanelFlatTextSection.tsx
@@ -0,0 +1,243 @@
+import { Plus } from "../../icons/SystemIcons";
+import { isTextEditableSelection, type DomEditSelection } from "./domEditing";
+import type { ImportedFontAsset } from "./fontAssets";
+import { normalizeTextMetricValue } from "./propertyPanelHelpers";
+import { ColorField } from "./propertyPanelColor";
+import { FontFamilyField } from "./propertyPanelFont";
+import { FlatRow, FlatSegmentedRow } from "./propertyPanelFlatPrimitives";
+import {
+  resolveValueTier,
+  VALUE_TIER_LABEL_CLASS,
+  VALUE_TIER_VALUE_CLASS,
+} from "./propertyPanelValueTier";
+import {
+  detectAvailableWeights,
+  getTextFieldColor,
+  getTextStyleValue,
+  TextAreaField,
+  TextSection,
+  WEIGHT_LABELS,
+} from "./propertyPanelSections";
+
+/* ------------------------------------------------------------------ */
+/*  Flat text section (design_handoff_studio_inspector, #10a)          */
+/* ------------------------------------------------------------------ */
+
+const ALIGN_OPTIONS = [
+  { key: "left", label: "left", node: "L" },
+  { key: "center", label: "center", node: "C" },
+  { key: "right", label: "right", node: "R" },
+  { key: "justify", label: "justify", node: "J" },
+];
+
+const CASE_OPTIONS = [
+  { key: "none", node: "–" },
+  { key: "uppercase", node: "AG" },
+  { key: "lowercase", node: "ag" },
+];
+
+function FlatTextFieldEditor({
+  field,
+  styles,
+  fontAssets,
+  onImportFonts,
+  onSetText,
+  onSetTextFieldStyle,
+}: {
+  field: DomEditSelection["textFields"][number];
+  styles: Record<string, string>;
+  fontAssets: ImportedFontAsset[];
+  onImportFonts?: (files: FileList | File[]) => Promise<ImportedFontAsset[]>;
+  onSetText: (value: string, fieldKey?: string) => void;
+  onSetTextFieldStyle: (fieldKey: string, property: string, value: string) => void;
+}) {
+  const weight = getTextStyleValue(field, styles, "font-weight", "400");
+  const weightOptions = detectAvailableWeights(
+    field.computedStyles["font-family"] || styles["font-family"] || "",
+  );
+  const align = getTextStyleValue(field, styles, "text-align", "start");
+  const textTransform = getTextStyleValue(field, styles, "text-transform", "none");
+  const fontStyle = getTextStyleValue(field, styles, "font-style", "normal");
+
+  return (
+    <>
+      <TextAreaField
+        flat
+        label="Content"
+        value={field.value}
+        onCommit={(next) => onSetText(next, field.key)}
+      />
+      <FontFamilyField
+        flat
+        value={field.computedStyles["font-family"] || styles["font-family"] || "inherit"}
+        importedFonts={fontAssets}
+        onImportFonts={onImportFonts}
+        onCommit={(next) => onSetTextFieldStyle(field.key, "font-family", next)}
+      />
+      <FlatRow
+        label="Size"
+        value={field.computedStyles["font-size"] || styles["font-size"] || "16px"}
+        tier={resolveValueTier(field.inlineStyles["font-size"], styles["font-size"] || "16px")}
+        onCommit={(next) => onSetTextFieldStyle(field.key, "font-size", next)}
+      />
+      <div className="flex min-h-[30px] items-center justify-between">
+        <span
+          className={
+            VALUE_TIER_LABEL_CLASS[resolveValueTier(field.inlineStyles["font-weight"], "400")]
+          }
+          style={{ fontSize: 11 }}
+        >
+          Weight
+        </span>
+        <label className="flex items-center gap-1.5">
+          <select
+            value={weight}
+            onChange={(e) => onSetTextFieldStyle(field.key, "font-weight", e.target.value)}
+            className={`appearance-none bg-transparent text-right font-mono text-[11px] outline-none ${
+              VALUE_TIER_VALUE_CLASS[resolveValueTier(field.inlineStyles["font-weight"], "400")]
+            }`}
+          >
+            {(weightOptions.includes(weight) ? weightOptions : [weight, ...weightOptions]).map(
+              (option) => (
+                <option key={option} value={option}>
+                  {WEIGHT_LABELS[option] ?? option}
+                </option>
+              ),
+            )}
+          </select>
+          <svg
+            width="10"
+            height="10"
+            viewBox="0 0 10 10"
+            fill="currentColor"
+            className="flex-shrink-0 text-panel-text-5"
+          >
+            <path d="M2 3l3 4 3-4z" />
+          </svg>
+        </label>
+      </div>
+      <FlatRow
+        label="Letter spacing"
+        value={getTextStyleValue(field, styles, "letter-spacing", "0px")}
+        tier={resolveValueTier(field.inlineStyles["letter-spacing"], "0px")}
+        onCommit={(next) =>
+          onSetTextFieldStyle(
+            field.key,
+            "letter-spacing",
+            normalizeTextMetricValue("letter-spacing", next),
+          )
+        }
+        onReset={() => onSetTextFieldStyle(field.key, "letter-spacing", "")}
+      />
+      <FlatRow
+        label="Line height"
+        value={getTextStyleValue(field, styles, "line-height", "normal")}
+        tier={resolveValueTier(field.inlineStyles["line-height"], "normal")}
+        onCommit={(next) =>
+          onSetTextFieldStyle(
+            field.key,
+            "line-height",
+            normalizeTextMetricValue("line-height", next),
+          )
+        }
+        onReset={() => onSetTextFieldStyle(field.key, "line-height", "")}
+      />
+      <FlatSegmentedRow
+        label="Align"
+        options={ALIGN_OPTIONS.map((option) => ({
+          key: option.key,
+          node: option.node,
+          active: align === option.key || (option.key === "left" && align === "start"),
+        }))}
+        onChange={(next) => onSetTextFieldStyle(field.key, "text-align", next)}
+      />
+      <FlatSegmentedRow
+        label="Case · Style"
+        options={[
+          ...CASE_OPTIONS.map((option) => ({
+            key: option.key,
+            node: option.node,
+            active: textTransform === option.key,
+          })),
+          { key: "normal", node: "A", active: fontStyle === "normal" },
+          { key: "italic", node: "A", active: fontStyle === "italic" },
+        ]}
+        spacerAfterIndex={2}
+        onChange={(next) => {
+          if (next === "normal" || next === "italic") {
+            onSetTextFieldStyle(field.key, "font-style", next);
+          } else {
+            onSetTextFieldStyle(field.key, "text-transform", next);
+          }
+        }}
+      />
+      <ColorField
+        flat
+        label="Color"
+        value={getTextFieldColor(field, styles)}
+        onCommit={(next) => onSetTextFieldStyle(field.key, "color", next)}
+      />
+    </>
+  );
+}
+
+export function FlatTextSection({
+  element,
+  styles,
+  fontAssets,
+  onImportFonts,
+  onSetText,
+  onSetTextFieldStyle,
+  onAddTextField,
+  onRemoveTextField,
+}: {
+  element: DomEditSelection;
+  styles: Record<string, string>;
+  fontAssets: ImportedFontAsset[];
+  onImportFonts?: (files: FileList | File[]) => Promise<ImportedFontAsset[]>;
+  onSetText: (value: string, fieldKey?: string) => void;
+  onSetTextFieldStyle: (fieldKey: string, property: string, value: string) => void;
+  onAddTextField: (afterFieldKey?: string) => string | Promise<string | null> | null;
+  onRemoveTextField: (fieldKey: string) => void;
+}) {
+  if (!isTextEditableSelection(element)) return null;
+  const textFields = element.textFields;
+  const activeField = textFields[0];
+  if (!activeField) return null;
+
+  if (textFields.length > 1) {
+    return (
+      <TextSection
+        element={element}
+        styles={styles}
+        fontAssets={fontAssets}
+        onImportFonts={onImportFonts}
+        onSetText={onSetText}
+        onSetTextFieldStyle={onSetTextFieldStyle}
+        onAddTextField={onAddTextField}
+        onRemoveTextField={onRemoveTextField}
+      />
+    );
+  }
+
+  return (
+    <div className="space-y-1.5">
+      <FlatTextFieldEditor
+        field={activeField}
+        styles={styles}
+        fontAssets={fontAssets}
+        onImportFonts={onImportFonts}
+        onSetText={onSetText}
+        onSetTextFieldStyle={onSetTextFieldStyle}
+      />
+      <button
+        type="button"
+        onClick={() => void onAddTextField(activeField.key)}
+        className="mt-0.5 flex items-center gap-[5px] text-[10px] text-panel-text-4 hover:text-panel-text-2"
+      >
+        <Plus size={10} />
+        Add text field
+      </button>
+    </div>
+  );
+}
diff --git a/packages/studio/src/components/editor/propertyPanelSections.test.tsx b/packages/studio/src/components/editor/propertyPanelSections.test.tsx
new file mode 100644
index 000000000..52fc8dd07
--- /dev/null
+++ b/packages/studio/src/components/editor/propertyPanelSections.test.tsx
@@ -0,0 +1,135 @@
+// @vitest-environment happy-dom
+
+import React, { act } from "react";
+import { createRoot } from "react-dom/client";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { FlatTextSection } from "./propertyPanelFlatTextSection";
+import type { DomEditSelection } from "./domEditingTypes";
+
+(globalThis as unknown as { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT = true;
+
+afterEach(() => {
+  document.body.innerHTML = "";
+});
+
+function makeElement(overrides: Partial<DomEditSelection> = {}): DomEditSelection {
+  return {
+    element: document.createElement("div"),
+    id: "mono-label",
+    selector: ".mono-label",
+    label: "Mono Label",
+    tagName: "div",
+    sourceFile: "index.html",
+    compositionPath: "index.html",
+    isCompositionHost: false,
+    isInsideLockedComposition: false,
+    boundingBox: { x: 0, y: -24, width: 257, height: 29 },
+    textContent: "PACKETS / FRAME",
+    dataAttributes: {},
+    inlineStyles: {},
+    computedStyles: {},
+    textFields: [
+      {
+        key: "field-0",
+        label: "Text",
+        value: "PACKETS / FRAME",
+        tagName: "div",
+        attributes: [],
+        inlineStyles: { "letter-spacing": "3.96px" },
+        computedStyles: {
+          "font-family": "JetBrains Mono",
+          "font-size": "22px",
+          "font-weight": "400",
+          "letter-spacing": "3.96px",
+          "line-height": "normal",
+          "text-align": "right",
+          "text-transform": "none",
+          "font-style": "normal",
+          color: "rgb(255, 176, 32)",
+        },
+        source: "self",
+      },
+    ],
+    capabilities: {
+      canSelect: true,
+      canEditStyles: true,
+      canCrop: true,
+      canMove: true,
+      canResize: true,
+      canApplyManualOffset: true,
+      canApplyManualSize: true,
+      canApplyManualRotation: true,
+    },
+    ...overrides,
+  } as DomEditSelection;
+}
+
+function renderSection(overrides: Partial<DomEditSelection> = {}) {
+  const host = document.createElement("div");
+  document.body.append(host);
+  const root = createRoot(host);
+  const element = makeElement(overrides);
+  act(() => {
+    root.render(
+      <FlatTextSection
+        element={element}
+        styles={{}}
+        fontAssets={[]}
+        onSetText={vi.fn()}
+        onSetTextFieldStyle={vi.fn()}
+        onAddTextField={vi.fn()}
+        onRemoveTextField={vi.fn()}
+      />,
+    );
+  });
+  return { host, root };
+}
+
+describe("FlatTextSection", () => {
+  it("renders the content block and every row from #10a", () => {
+    const { host, root } = renderSection();
+    expect(host.textContent).toContain("PACKETS / FRAME");
+    expect(host.textContent).toContain("Font");
+    expect(host.textContent).toContain("Weight");
+    expect(host.textContent).toContain("Letter spacing");
+    expect(host.textContent).toContain("Line height");
+    expect(host.textContent).toContain("Align");
+    act(() => root.unmount());
+  });
+
+  it("colors letter-spacing mint (explicit, differs from 0px default) with a reset button", () => {
+    const { host, root } = renderSection();
+    const resetButtons = host.querySelectorAll('[data-flat-row-reset="true"]');
+    expect(resetButtons.length).toBeGreaterThan(0);
+    act(() => root.unmount());
+  });
+
+  it("commits a font-weight change through onSetTextFieldStyle", () => {
+    const onSetTextFieldStyle = vi.fn();
+    const host = document.createElement("div");
+    document.body.append(host);
+    const root = createRoot(host);
+    const element = makeElement();
+    act(() => {
+      root.render(
+        <FlatTextSection
+          element={element}
+          styles={{}}
+          fontAssets={[]}
+          onSetText={vi.fn()}
+          onSetTextFieldStyle={onSetTextFieldStyle}
+          onAddTextField={vi.fn()}
+          onRemoveTextField={vi.fn()}
+        />,
+      );
+    });
+    const select = host.querySelector<HTMLSelectElement>("select");
+    if (!select) throw new Error("expected a weight <select>");
+    act(() => {
+      select.value = "700";
+      select.dispatchEvent(new Event("change", { bubbles: true }));
+    });
+    expect(onSetTextFieldStyle).toHaveBeenCalledWith("field-0", "font-weight", "700");
+    act(() => root.unmount());
+  });
+});
diff --git a/packages/studio/src/components/editor/propertyPanelSections.tsx b/packages/studio/src/components/editor/propertyPanelSections.tsx
index a14ea65ae..dede93388 100644
--- a/packages/studio/src/components/editor/propertyPanelSections.tsx
+++ b/packages/studio/src/components/editor/propertyPanelSections.tsx
@@ -18,14 +18,14 @@ function formatTextFieldPreview(value: string): string {
   return `${collapsed.slice(0, 55)}…`;
 }
 
-function getTextFieldColor(
+export function getTextFieldColor(
   field: { computedStyles: Record<string, string> },
   inheritedStyles: Record<string, string>,
 ): string {
   return field.computedStyles.color || inheritedStyles.color || "rgb(0, 0, 0)";
 }
 
-function getTextStyleValue(
+export function getTextStyleValue(
   field: { computedStyles: Record<string, string> },
   inheritedStyles: Record<string, string>,
   property: string,
@@ -35,7 +35,7 @@ function getTextStyleValue(
 }
 
 const ALL_WEIGHTS = ["100", "200", "300", "400", "500", "600", "700", "800", "900"];
-const WEIGHT_LABELS: Record<string, string> = {
+export const WEIGHT_LABELS: Record<string, string> = {
   "100": "100 · Thin",
   "200": "200 · Extra Light",
   "300": "300 · Light",
@@ -47,7 +47,7 @@ const WEIGHT_LABELS: Record<string, string> = {
   "900": "900 · Black",
 };
 
-function detectAvailableWeights(fontFamily: string): string[] {
+export function detectAvailableWeights(fontFamily: string): string[] {
   const fonts = document.fonts;
   if (!fonts) return ALL_WEIGHTS;
   const family = fontFamily.split(",")[0]?.trim().replace(/['"]/g, "");