diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0ee04d9f0..0c969b584 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,7 +19,7 @@
 - Drag with the Text tool to create a fixed-size text box, or click to create auto-width text.
 - Target a specific open document and page from live CLI and MCP automation, including sessions with multiple documents.
 - Test OpenAI-compatible provider connections from AI settings with clearer setup errors.
-- Build custom property panels with new Vue SDK number fields, bindable values, property sections, segmented controls, property lists, color models, fill controls, and gradient primitives.
+- Build custom property panels with new Vue SDK number fields, bindable values, property sections, responsive property grids, segmented controls, property lists, color models, fill controls, and gradient primitives.
 - Connect local MCP clients through automatically discovered private Unix sockets on macOS and Linux, with localhost TCP fallback. (#338)
 - Create centered frames from current Figma-style device and asset presets, or resize selected frames from the Design panel while preserving their names.
 
diff --git a/packages/docs/programmable/sdk/api/components/index.md b/packages/docs/programmable/sdk/api/components/index.md
index a642c2e36..c2d97d90f 100644
--- a/packages/docs/programmable/sdk/api/components/index.md
+++ b/packages/docs/programmable/sdk/api/components/index.md
@@ -23,6 +23,7 @@ description: Component reference for headless Vue primitives in @open-pencil/vue
 
 <SdkCardGroup>
   <SdkCard title="PropertySection" to="/programmable/sdk/api/components/property-section" description="Collapsible property-section anatomy and empty states." />
+  <SdkCard title="PropertyGrid" to="/programmable/sdk/api/components/property-grid" description="Responsive field-grid and action-rail anatomy." />
   <SdkCard title="SegmentedControl" to="/programmable/sdk/api/components/segmented-control" description="Accessible selection and action-only segment groups." />
   <SdkCard title="PropertyListRoot" to="/programmable/sdk/api/components/property-list-root" description="Headless property list primitive." />
   <SdkCard title="PropertyListItem" to="/programmable/sdk/api/components/property-list-item" description="Single fills, strokes, or effects row primitive." />
diff --git a/packages/docs/programmable/sdk/api/components/property-grid.data.ts b/packages/docs/programmable/sdk/api/components/property-grid.data.ts
new file mode 100644
index 000000000..d242e2890
--- /dev/null
+++ b/packages/docs/programmable/sdk/api/components/property-grid.data.ts
@@ -0,0 +1,5 @@
+import { defineComponentMetaLoader } from '#docs/sdk/component-meta'
+
+const sources = ['packages/vue/src/primitives/PropertyGrid/PropertyGridRoot.vue']
+
+export default defineComponentMetaLoader(sources)
diff --git a/packages/docs/programmable/sdk/api/components/property-grid.md b/packages/docs/programmable/sdk/api/components/property-grid.md
new file mode 100644
index 000000000..14374349f
--- /dev/null
+++ b/packages/docs/programmable/sdk/api/components/property-grid.md
@@ -0,0 +1,40 @@
+---
+title: PropertyGrid
+description: Headless field-grid and action-rail anatomy for property panels.
+---
+
+<script setup lang="ts">
+import { data } from './property-grid.data'
+</script>
+
+# PropertyGrid
+
+`PropertyGridRoot` separates responsive property fields from optional intrinsic-width actions. It exposes structural data attributes without imposing column widths, gaps, or presentation.
+
+```vue twoslash
+<script setup lang="ts">
+import { PropertyGridRoot } from '@open-pencil/vue'
+</script>
+
+<template>
+  <PropertyGridRoot :columns="2">
+    <label>
+      Width
+      <input type="number" />
+    </label>
+    <label>
+      Height
+      <input type="number" />
+    </label>
+    <template #actions>
+      <button type="button" aria-label="Constrain proportions">Link</button>
+    </template>
+  </PropertyGridRoot>
+</template>
+```
+
+Themes can target `data-slot="fields"`, `data-slot="actions"`, `data-columns`, and `data-distribution`. The `wide-first` distribution is semantic; consumers choose its exact ratio.
+
+## Generated API reference
+
+<SdkComponentAPI :components="data.components" />
diff --git a/packages/vue/src/index.ts b/packages/vue/src/index.ts
index 2c9187e35..c82e631ec 100644
--- a/packages/vue/src/index.ts
+++ b/packages/vue/src/index.ts
@@ -246,6 +246,14 @@ export type {
   PropertyListRootSlotProps,
   PropertyListRootSlots
 } from '#vue/primitives/PropertyList'
+export { PropertyGridRoot } from '#vue/primitives/PropertyGrid'
+export type {
+  PropertyGridColumns,
+  PropertyGridDistribution,
+  PropertyGridRootProps,
+  PropertyGridRootSlots
+} from '#vue/primitives/PropertyGrid'
+
 export {
   PropertySectionRoot,
   PropertySectionHeader,
diff --git a/packages/vue/src/primitives/PropertyGrid/PropertyGridRoot.vue b/packages/vue/src/primitives/PropertyGrid/PropertyGridRoot.vue
new file mode 100644
index 000000000..78454f7eb
--- /dev/null
+++ b/packages/vue/src/primitives/PropertyGrid/PropertyGridRoot.vue
@@ -0,0 +1,27 @@
+<script setup lang="ts">
+import type {
+  PropertyGridRootProps,
+  PropertyGridRootSlots
+} from '#vue/primitives/PropertyGrid/types'
+
+const { columns = 1, distribution = 'equal' } = defineProps<PropertyGridRootProps>()
+defineSlots<PropertyGridRootSlots>()
+defineOptions({ inheritAttrs: false })
+</script>
+
+<template>
+  <div
+    v-bind="$attrs"
+    data-slot="root"
+    data-property-grid
+    :data-columns="columns"
+    :data-distribution="distribution"
+  >
+    <div data-slot="fields">
+      <slot />
+    </div>
+    <div v-if="$slots.actions" data-slot="actions">
+      <slot name="actions" />
+    </div>
+  </div>
+</template>
diff --git a/packages/vue/src/primitives/PropertyGrid/index.ts b/packages/vue/src/primitives/PropertyGrid/index.ts
new file mode 100644
index 000000000..cda77b067
--- /dev/null
+++ b/packages/vue/src/primitives/PropertyGrid/index.ts
@@ -0,0 +1,7 @@
+export { default as PropertyGridRoot } from '#vue/primitives/PropertyGrid/PropertyGridRoot.vue'
+export type {
+  PropertyGridColumns,
+  PropertyGridDistribution,
+  PropertyGridRootProps,
+  PropertyGridRootSlots
+} from '#vue/primitives/PropertyGrid/types'
diff --git a/packages/vue/src/primitives/PropertyGrid/types.ts b/packages/vue/src/primitives/PropertyGrid/types.ts
new file mode 100644
index 000000000..ace20d98c
--- /dev/null
+++ b/packages/vue/src/primitives/PropertyGrid/types.ts
@@ -0,0 +1,18 @@
+import type { VNode } from 'vue'
+
+export type PropertyGridColumns = 1 | 2 | 3
+export type PropertyGridDistribution = 'equal' | 'wide-first'
+
+export interface PropertyGridRootProps {
+  /** Number of field columns. @default 1 */
+  columns?: PropertyGridColumns
+  /** Relative distribution of field columns. @default 'equal' */
+  distribution?: PropertyGridDistribution
+}
+
+export interface PropertyGridRootSlots {
+  /** Property fields arranged by the consumer's visual theme. */
+  default(): VNode[]
+  /** Optional intrinsic-width controls kept separate from the field grid. */
+  actions?(): VNode[]
+}
diff --git a/src/components/color-picker-panel/OkhclChannelSlider.vue b/src/components/color-picker-panel/OkhclChannelSlider.vue
index f1d608206..07f0b36cd 100644
--- a/src/components/color-picker-panel/OkhclChannelSlider.vue
+++ b/src/components/color-picker-panel/OkhclChannelSlider.vue
@@ -77,7 +77,7 @@ const styles = useColorSliderUI(
       :max="displayMax"
       :step="displayStep"
       :suffix="suffix"
-      :ui="{ leading: 'hidden' }"
+      :ui="{ leading: 'hidden', field: 'pl-1.5', display: 'pl-1.5' }"
       @update:model-value="emit('updateDisplay', $event)"
     />
   </div>
diff --git a/src/components/color-picker-panel/StandardColorSlider.vue b/src/components/color-picker-panel/StandardColorSlider.vue
index 7080df110..590ebb80e 100644
--- a/src/components/color-picker-panel/StandardColorSlider.vue
+++ b/src/components/color-picker-panel/StandardColorSlider.vue
@@ -72,7 +72,7 @@ const styles = useColorSliderUI(
       :max="numberMax"
       :step="numberStep"
       :suffix="suffix"
-      :ui="{ leading: 'hidden' }"
+      :ui="{ leading: 'hidden', field: 'pl-1.5', display: 'pl-1.5' }"
       @update:model-value="emit('updateNumber', $event)"
     />
   </div>
diff --git a/src/components/fill-picker/FillPicker.vue b/src/components/fill-picker/FillPicker.vue
index 28c5b42d2..ecc3b78c9 100644
--- a/src/components/fill-picker/FillPicker.vue
+++ b/src/components/fill-picker/FillPicker.vue
@@ -52,7 +52,7 @@ function cancelFromEscape(event: KeyboardEvent) {
           type="button"
           :aria-label="panels.fill"
           data-test-id="fill-picker-swatch"
-          class="size-5 shrink-0 cursor-pointer rounded border-0 bg-transparent p-0"
+          class="size-4 shrink-0 cursor-pointer rounded-sm border-0 bg-transparent p-0"
         >
           <FillSwatch :fill="fill" class="size-full" v-slot="swatch">
             <span
diff --git a/src/components/properties/AppearanceSection.vue b/src/components/properties/AppearanceSection.vue
index 57c34fbe3..b85faad28 100644
--- a/src/components/properties/AppearanceSection.vue
+++ b/src/components/properties/AppearanceSection.vue
@@ -8,7 +8,6 @@ import AppSelect from '@/components/ui/AppSelect.vue'
 import IconButton from '@/components/ui/IconButton.vue'
 import PanelFieldGroup from '@/components/ui/panel/PanelFieldGroup.vue'
 import PanelGrid from '@/components/ui/panel/PanelGrid.vue'
-import PanelRail from '@/components/ui/panel/PanelRail.vue'
 import PanelSection from '@/components/ui/panel/PanelSection.vue'
 
 import type { BlendMode } from '@open-pencil/scene-graph'
@@ -55,7 +54,7 @@ function blendModeOptions(value: BlendMode | typeof MIXED) {
         </IconButton>
       </template>
 
-      <PanelGrid columns="appearance">
+      <PanelGrid :columns="2" distribution="wide-first">
         <PanelFieldGroup :label="panels.blendMode">
           <AppSelect
             :model-value="blendModeValue === MIXED ? 'MIXED' : blendModeValue"
@@ -103,11 +102,7 @@ function blendModeOptions(value: BlendMode | typeof MIXED) {
         </PanelFieldGroup>
       </PanelGrid>
 
-      <PanelGrid
-        v-if="hasCornerRadius && !showIndependentCorners"
-        columns="fill-rail"
-        class="mt-1.5"
-      >
+      <PanelGrid v-if="hasCornerRadius && !showIndependentCorners" :columns="2" class="mt-1.5">
         <PanelFieldGroup :label="panels.radius">
           <VariableNumberField
             v-if="node && !isMulti"
@@ -137,7 +132,7 @@ function blendModeOptions(value: BlendMode | typeof MIXED) {
             </template>
           </NumberField>
         </PanelFieldGroup>
-        <PanelRail>
+        <div class="flex h-6 items-center justify-end">
           <IconButton
             :label="panels.independentCornerRadii"
             size="md"
@@ -146,13 +141,13 @@ function blendModeOptions(value: BlendMode | typeof MIXED) {
           >
             <icon-lucide-square-round-corner class="size-3" />
           </IconButton>
-        </PanelRail>
+        </div>
       </PanelGrid>
 
       <PanelGrid
         v-else-if="hasCornerRadius && !isMulti && node"
-        columns="two-rail"
-        class="mt-1.5"
+        :columns="2"
+        class="mt-1.5 [&>[data-slot=actions]]:self-start"
         data-corner-grid
       >
         <VariableNumberField
@@ -173,16 +168,6 @@ function blendModeOptions(value: BlendMode | typeof MIXED) {
           @update:model-value="actions.updateCornerProp('topRightRadius', $event)"
           @commit="(v: number, p: number) => actions.commitCornerProp('topRightRadius', v, p)"
         />
-        <PanelRail>
-          <IconButton
-            :label="panels.independentCornerRadii"
-            size="md"
-            active
-            @click="actions.toggleIndependentCorners"
-          >
-            <icon-lucide-square-round-corner class="size-3" />
-          </IconButton>
-        </PanelRail>
         <VariableNumberField
           label="BL"
           :model-value="node.bottomLeftRadius"
@@ -201,10 +186,19 @@ function blendModeOptions(value: BlendMode | typeof MIXED) {
           @update:model-value="actions.updateCornerProp('bottomRightRadius', $event)"
           @commit="(v: number, p: number) => actions.commitCornerProp('bottomRightRadius', v, p)"
         />
-        <PanelRail />
+        <template #actions>
+          <IconButton
+            :label="panels.independentCornerRadii"
+            size="md"
+            active
+            @click="actions.toggleIndependentCorners"
+          >
+            <icon-lucide-square-round-corner class="size-3" />
+          </IconButton>
+        </template>
       </PanelGrid>
 
-      <PanelGrid v-if="hasCornerRadius" columns="fill" class="mt-1.5">
+      <PanelGrid v-if="hasCornerRadius" :columns="2" class="mt-1.5">
         <PanelFieldGroup :label="panels.cornerSmoothing">
           <NumberField
             suffix="%"
diff --git a/src/components/properties/FillSection.vue b/src/components/properties/FillSection.vue
index eb1d5ce72..cc323f508 100644
--- a/src/components/properties/FillSection.vue
+++ b/src/components/properties/FillSection.vue
@@ -93,67 +93,68 @@ function updateSolidColor(
           :visibility-label="panels.toggleVisibility"
           :remove-label="panels.removeFill"
         >
-          <div class="flex min-w-0 flex-1 flex-col gap-1.5">
-            <BindableValueRoot
-              v-slot="binding"
-              :provider="colorProvider"
-              :targets="paintBindingTargets(selectedNodeIds, 'fills', index)"
-              :value="fill.color"
-              batch-label="Change fill color"
+          <BindableValueRoot
+            v-slot="binding"
+            :provider="colorProvider"
+            :targets="paintBindingTargets(selectedNodeIds, 'fills', index)"
+            :value="fill.color"
+            batch-label="Change fill color"
+          >
+            <PaintField
+              class="w-full flex-none"
+              :opacity="fill.opacity"
+              :opacity-label="panels.opacity"
+              @update:opacity="actions.patch(index, { opacity: $event })"
             >
-              <PaintField
-                class="w-full flex-none"
-                :opacity="fill.opacity"
-                :opacity-label="panels.opacity"
-                @update:opacity="actions.patch(index, { opacity: $event })"
-              >
-                <template #preview>
-                  <FillPicker
-                    :fill="displayFill(fill, binding.resolvedValue)"
-                    :okhcl="createFillOkhclAdapter(okhcl, activeNode, index)"
-                    @update="
-                      updatePickerFill(binding.actions, flush, $event, (next) =>
-                        actions.update(index, next)
-                      )
-                    "
-                    @open-change="!$event && commitPaintMutation(binding.actions)"
-                    @cancel="cancelPaintMutation(binding.actions)"
-                  />
-                </template>
+              <template #preview>
+                <FillPicker
+                  :fill="displayFill(fill, binding.resolvedValue)"
+                  :okhcl="createFillOkhclAdapter(okhcl, activeNode, index)"
+                  @update="
+                    updatePickerFill(binding.actions, flush, $event, (next) =>
+                      actions.update(index, next)
+                    )
+                  "
+                  @open-change="!$event && commitPaintMutation(binding.actions)"
+                  @cancel="cancelPaintMutation(binding.actions)"
+                />
+              </template>
 
-                <template #value>
-                  <PaintValue
-                    v-if="fill.type === 'SOLID'"
-                    :color="fill.color"
-                    :resolved-color="binding.resolvedValue"
-                    :variable-name="binding.variable?.name"
-                    :label="panels.fill"
-                    @update="
-                      updateSolidColor(binding.actions, flush, fill, $event, (next) =>
-                        actions.update(index, next)
-                      )
-                    "
-                  />
-                  <span v-else class="min-w-0 flex-1 truncate font-mono text-xs text-surface">
-                    {{ fillLabel(fill) }}
-                  </span>
-                </template>
+              <template #value>
+                <PaintValue
+                  v-if="fill.type === 'SOLID'"
+                  :color="fill.color"
+                  :resolved-color="binding.resolvedValue"
+                  :variable-name="binding.variable?.name"
+                  :label="panels.fill"
+                  @update="
+                    updateSolidColor(binding.actions, flush, fill, $event, (next) =>
+                      actions.update(index, next)
+                    )
+                  "
+                />
+                <span v-else class="min-w-0 flex-1 truncate font-mono text-xs text-surface">
+                  {{ fillLabel(fill) }}
+                </span>
+              </template>
 
-                <template v-if="fill.type === 'SOLID'" #binding>
-                  <VariableBindingPicker
-                    :trigger-label="panels.applyVariable"
-                    :search-placeholder="dialogs.search"
-                    :empty-label="panels.noVariablesFound"
-                    :detach-label="panels.detachVariable"
-                    :create-label="
-                      panels.createColorVariable({ value: `#${colorToHexRaw(fill.color)}` })
-                    "
-                    :create-name-placeholder="panels.variableName"
-                    :create-submit-label="panels.create"
-                  />
-                </template>
-              </PaintField>
-            </BindableValueRoot>
+              <template v-if="fill.type === 'SOLID'" #binding>
+                <VariableBindingPicker
+                  :trigger-label="panels.applyVariable"
+                  :search-placeholder="dialogs.search"
+                  :empty-label="panels.noVariablesFound"
+                  :detach-label="panels.detachVariable"
+                  :create-label="
+                    panels.createColorVariable({ value: `#${colorToHexRaw(fill.color)}` })
+                  "
+                  :create-name-placeholder="panels.variableName"
+                  :create-submit-label="panels.create"
+                />
+              </template>
+            </PaintField>
+          </BindableValueRoot>
+
+          <template #details>
             <PanelFieldGroup :label="panels.blendMode">
               <AppSelect
                 :model-value="fill.blendMode ?? 'NORMAL'"
@@ -167,7 +168,7 @@ function updateSolidColor(
                 "
               />
             </PanelFieldGroup>
-          </div>
+          </template>
         </PropertyItemRow>
       </div>
     </PanelSection>
diff --git a/src/components/properties/LayoutSection/LayoutGridSection.vue b/src/components/properties/LayoutSection/LayoutGridSection.vue
index b7fa841ee..0a56c2ca3 100644
--- a/src/components/properties/LayoutSection/LayoutGridSection.vue
+++ b/src/components/properties/LayoutSection/LayoutGridSection.vue
@@ -100,7 +100,7 @@ function isGrid(grid: LayoutGrid): boolean {
             </Tip>
           </template>
         </SegmentedControl>
-        <PanelGrid columns="two">
+        <PanelGrid :columns="2">
           <PanelFieldGroup :label="panels.gridCount">
             <NumberField
               :model-value="grid.count ?? grid.numSections ?? 1"
diff --git a/src/components/properties/LayoutSection/size/SizeControls.vue b/src/components/properties/LayoutSection/size/SizeControls.vue
index c2d1e38d7..9dbb71886 100644
--- a/src/components/properties/LayoutSection/size/SizeControls.vue
+++ b/src/components/properties/LayoutSection/size/SizeControls.vue
@@ -48,12 +48,12 @@ const visibleSizeLimits = computed(() =>
 </script>
 
 <template>
-  <PanelGrid columns="two">
+  <PanelGrid :columns="2">
     <SizeAxisField axis="width" icon="W" :label="panels.width" />
     <SizeAxisField axis="height" icon="H" :label="panels.height" />
   </PanelGrid>
 
-  <PanelGrid v-if="visibleSizeLimits.length" columns="two" class="mt-1.5">
+  <PanelGrid v-if="visibleSizeLimits.length" :columns="2" class="mt-1.5">
     <SizeLimitField v-for="item in visibleSizeLimits" :key="item.prop" :item="item" />
   </PanelGrid>
 </template>
diff --git a/src/components/properties/PositionSection.vue b/src/components/properties/PositionSection.vue
index 4b6e66c5c..44de639f5 100644
--- a/src/components/properties/PositionSection.vue
+++ b/src/components/properties/PositionSection.vue
@@ -79,7 +79,7 @@ function handleAlign(
         </div>
       </div>
 
-      <PanelGrid columns="two">
+      <PanelGrid :columns="2">
         <Tip :label="panels.xAxis">
           <NumberField
             icon="X"
@@ -102,7 +102,7 @@ function handleAlign(
         </Tip>
       </PanelGrid>
 
-      <PanelGrid v-if="isMulti" columns="two" class="mt-1.5">
+      <PanelGrid v-if="isMulti" :columns="2" class="mt-1.5">
         <Tip :label="panels.width">
           <NumberField
             icon="W"
@@ -127,7 +127,7 @@ function handleAlign(
         </Tip>
       </PanelGrid>
 
-      <div class="mt-1.5 grid grid-cols-[minmax(0,1fr)_repeat(3,24px)] gap-0.5">
+      <PanelGrid :columns="2" class="mt-1.5">
         <Tip :label="panels.rotation">
           <NumberField
             suffix="°"
@@ -144,16 +144,18 @@ function handleAlign(
             </template>
           </NumberField>
         </Tip>
-        <IconButton :label="panels.flipHorizontal" size="md" @click="actions.flip('horizontal')">
-          <icon-lucide-flip-horizontal-2 class="size-3.5" />
-        </IconButton>
-        <IconButton :label="panels.flipVertical" size="md" @click="actions.flip('vertical')">
-          <icon-lucide-flip-vertical-2 class="size-3.5" />
-        </IconButton>
-        <IconButton :label="panels.rotate90" size="md" @click="actions.rotate(90)">
-          <icon-lucide-rotate-cw-square class="size-3.5" />
-        </IconButton>
-      </div>
+        <div class="flex h-6 items-center justify-end gap-0.5">
+          <IconButton :label="panels.flipHorizontal" size="md" @click="actions.flip('horizontal')">
+            <icon-lucide-flip-horizontal-2 class="size-3.5" />
+          </IconButton>
+          <IconButton :label="panels.flipVertical" size="md" @click="actions.flip('vertical')">
+            <icon-lucide-flip-vertical-2 class="size-3.5" />
+          </IconButton>
+          <IconButton :label="panels.rotate90" size="md" @click="actions.rotate(90)">
+            <icon-lucide-rotate-cw-square class="size-3.5" />
+          </IconButton>
+        </div>
+      </PanelGrid>
     </PanelSection>
   </PositionControlsRoot>
 </template>
diff --git a/src/components/properties/StrokeSection.vue b/src/components/properties/StrokeSection.vue
index 607e5b9fe..f9eaedc2f 100644
--- a/src/components/properties/StrokeSection.vue
+++ b/src/components/properties/StrokeSection.vue
@@ -154,7 +154,7 @@ function onToggleSides(activeNode: SceneNode | null) {
                   <button
                     type="button"
                     :aria-label="panels.stroke"
-                    class="size-5 shrink-0 cursor-pointer rounded border-0 bg-transparent p-0"
+                    class="size-4 shrink-0 cursor-pointer rounded-sm border-0 bg-transparent p-0"
                   >
                     <FillSwatch
                       :fill="strokePreview(stroke, binding.resolvedValue ?? stroke.color)"
@@ -266,7 +266,7 @@ function onToggleSides(activeNode: SceneNode | null) {
         </template>
       </div>
 
-      <PanelGrid v-if="advancedActive" columns="three" class="mt-1.5">
+      <PanelGrid v-if="advancedActive" :columns="3" class="mt-1.5">
         <PanelFieldGroup :label="panels.strokeCap">
           <SegmentedControl
             :model-value="cap === MIXED ? 'MIXED' : cap"
diff --git a/src/components/properties/TypographySection.vue b/src/components/properties/TypographySection.vue
index b614ee20a..a954783b6 100644
--- a/src/components/properties/TypographySection.vue
+++ b/src/components/properties/TypographySection.vue
@@ -88,7 +88,7 @@ function featureEnabled(features: Array<{ tag: string; enabled: boolean }>, tag:
         </Tip>
       </div>
 
-      <PanelGrid columns="two" class="mb-3">
+      <PanelGrid :columns="2" class="mb-3">
         <PanelFieldGroup :label="panels.fontWeight">
           <AppSelect
             :label="panels.fontWeight"
@@ -111,7 +111,7 @@ function featureEnabled(features: Array<{ tag: string; enabled: boolean }>, tag:
         </PanelFieldGroup>
       </PanelGrid>
 
-      <PanelGrid columns="two" class="mb-3">
+      <PanelGrid :columns="2" class="mb-3">
         <PanelFieldGroup :label="panels.lineHeight">
           <VariableNumberField
             :model-value="
@@ -196,7 +196,11 @@ function featureEnabled(features: Array<{ tag: string; enabled: boolean }>, tag:
         </SegmentedControl>
       </PanelFieldGroup>
 
-      <PanelFieldGroup :label="panels.textFormatting" class="mb-3" :ui="{ container: 'flex-row gap-1.5' }">
+      <PanelFieldGroup
+        :label="panels.textFormatting"
+        class="mb-3"
+        :ui="{ container: 'flex-row gap-1.5' }"
+      >
         <div
           class="inline-flex items-center gap-0.5 rounded bg-panel-field p-0.5 hover:bg-panel-field-hover"
           role="toolbar"
@@ -237,7 +241,7 @@ function featureEnabled(features: Array<{ tag: string; enabled: boolean }>, tag:
         </div>
       </PanelFieldGroup>
 
-      <PanelGrid columns="two" class="mb-3">
+      <PanelGrid :columns="2" class="mb-3">
         <PanelFieldGroup :label="panels.textCase">
           <AppSelect
             :label="panels.textCase"
diff --git a/src/components/properties/item-list/PropertyItemRow.vue b/src/components/properties/item-list/PropertyItemRow.vue
index 6f758dcdd..2d5536c07 100644
--- a/src/components/properties/item-list/PropertyItemRow.vue
+++ b/src/components/properties/item-list/PropertyItemRow.vue
@@ -32,6 +32,7 @@ const emit = defineEmits<{
 defineSlots<{
   default(props: PropertyListItemSlotProps<K>): VNode[]
   rail?(props: PropertyListItemSlotProps<K>): VNode[]
+  details?(props: PropertyListItemSlotProps<K>): VNode[]
 }>()
 </script>
 
@@ -47,6 +48,9 @@ defineSlots<{
   >
     <PanelItemRow>
       <slot v-bind="item" />
+      <template v-if="$slots.details" #details>
+        <slot name="details" v-bind="item" />
+      </template>
       <template #rail="{ removeClass }">
         <slot name="rail" v-bind="item" />
         <Tip v-if="showVisibility" :label="visibilityLabel">
diff --git a/src/components/properties/paint/PaintField.vue b/src/components/properties/paint/PaintField.vue
index 8ce577065..bc82b46c3 100644
--- a/src/components/properties/paint/PaintField.vue
+++ b/src/components/properties/paint/PaintField.vue
@@ -56,7 +56,9 @@ const styles = computed(() => tv(paintFieldTheme)())
       :max="100"
       :ui="{
         root: 'h-full rounded-none border-0 bg-transparent shadow-none',
-        leading: 'hidden'
+        leading: 'hidden',
+        field: 'pl-1.5',
+        display: 'pl-1.5'
       }"
       data-property="opacity"
       @update:model-value="emit('update:opacity', Math.max(0, Math.min(1, $event / 100)))"
diff --git a/src/components/properties/shared-style/SharedStyleField.vue b/src/components/properties/shared-style/SharedStyleField.vue
index 318f0781f..749c0013c 100644
--- a/src/components/properties/shared-style/SharedStyleField.vue
+++ b/src/components/properties/shared-style/SharedStyleField.vue
@@ -45,7 +45,7 @@ function update(value: string) {
 </script>
 
 <template>
-  <PanelGrid v-if="visible" columns="fill" class="mb-1.5">
+  <PanelGrid v-if="visible" class="mb-1.5">
     <PanelFieldGroup :label="label">
       <AppSelect
         :model-value="styleId === MIXED ? 'MIXED' : (styleId ?? 'NONE')"
diff --git a/src/components/ui/panel/PanelFoundation.stories.ts b/src/components/ui/panel/PanelFoundation.stories.ts
index 79d03338a..f43169c03 100644
--- a/src/components/ui/panel/PanelFoundation.stories.ts
+++ b/src/components/ui/panel/PanelFoundation.stories.ts
@@ -16,7 +16,6 @@ import SegmentedControl from '@/components/ui/SegmentedControl.vue'
 import PanelFieldGroup from './PanelFieldGroup.vue'
 import PanelGrid from './PanelGrid.vue'
 import PanelHeader from './PanelHeader.vue'
-import PanelRail from './PanelRail.vue'
 import PanelSection from './PanelSection.vue'
 
 const meta = {
@@ -47,7 +46,6 @@ export const StateMatrix: Story = {
       PanelFieldGroup,
       PanelGrid,
       PanelHeader,
-      PanelRail,
       PanelSection,
       RotateIcon,
       SegmentedControl,
@@ -98,30 +96,30 @@ export const StateMatrix: Story = {
             <template #actions>
               <IconButton label="Reset layout"><RotateIcon class="size-3.5" /></IconButton>
             </template>
-            <PanelGrid columns="two-rail">
+            <PanelGrid :columns="2">
               <PanelFieldGroup label="Width">
                 <AppInput v-model="width" tone="panel" data-story-control data-state="idle" aria-label="Width" />
               </PanelFieldGroup>
               <PanelFieldGroup label="Height">
                 <AppInput v-model="height" tone="panel" data-story-control data-state="focus" aria-label="Height" />
               </PanelFieldGroup>
-              <PanelRail>
+              <template #actions>
                 <IconButton label="Constrain proportions" size="md"><LinkIcon class="size-3.5" /></IconButton>
-              </PanelRail>
+              </template>
             </PanelGrid>
           </PanelSection>
 
           <PanelSection label="Appearance">
-            <PanelGrid columns="two-rail">
+            <PanelGrid :columns="2">
               <PanelFieldGroup label="Blend mode">
                 <AppSelect v-model="blendMode" :options="blendModes" data-story-control aria-label="Blend mode" />
               </PanelFieldGroup>
               <PanelFieldGroup label="Opacity">
                 <AppInput v-model="mixed" tone="panel" state="mixed" readonly data-story-control aria-label="Mixed opacity" />
               </PanelFieldGroup>
-              <PanelRail>
+              <template #actions>
                 <IconButton label="Toggle visibility"><EyeIcon class="size-3.5" /></IconButton>
-              </PanelRail>
+              </template>
             </PanelGrid>
           </PanelSection>
 
diff --git a/src/components/ui/panel/PanelGrid.vue b/src/components/ui/panel/PanelGrid.vue
index 0f8ed6d5d..97ee56f7e 100644
--- a/src/components/ui/panel/PanelGrid.vue
+++ b/src/components/ui/panel/PanelGrid.vue
@@ -1,37 +1,36 @@
 <script lang="ts">
-import type { VNode } from 'vue'
+import type { PropertyGridRootSlots } from '@open-pencil/vue'
 import type { ClassValue } from 'tailwind-variants'
 
-import type { PanelGridTheme } from '@/theme/panel/grid'
-type PanelGridColumns = keyof PanelGridTheme['variants']['columns']
-
 export interface PanelGridProps {
-  columns?: PanelGridColumns
+  columns?: 1 | 2 | 3
+  distribution?: 'equal' | 'wide-first'
   class?: ClassValue
 }
 
-export interface PanelGridSlots {
-  default(): VNode[]
-}
+export type PanelGridSlots = PropertyGridRootSlots
 </script>
 
 <script setup lang="ts">
+import { PropertyGridRoot } from '@open-pencil/vue'
 import { tv } from 'tailwind-variants'
 
 import theme from '@/theme/panel/grid'
 
-const { columns = 'two-rail', class: className } = defineProps<PanelGridProps>()
+const { columns = 1, distribution = 'equal', class: className } = defineProps<PanelGridProps>()
 defineSlots<PanelGridSlots>()
 const panelGrid = tv(theme)
 </script>
 
 <template>
-  <div
-    data-slot="root"
-    data-panel-grid
-    :data-columns="columns"
-    :class="panelGrid({ columns, class: className })"
+  <PropertyGridRoot
+    :columns="columns"
+    :distribution="distribution"
+    :class="panelGrid({ columns, distribution, class: className })"
   >
     <slot />
-  </div>
+    <template v-if="$slots.actions" #actions>
+      <slot name="actions" />
+    </template>
+  </PropertyGridRoot>
 </template>
diff --git a/src/components/ui/panel/PanelItemRow.vue b/src/components/ui/panel/PanelItemRow.vue
index 87d93b9b2..56be221ff 100644
--- a/src/components/ui/panel/PanelItemRow.vue
+++ b/src/components/ui/panel/PanelItemRow.vue
@@ -15,6 +15,7 @@ export interface PanelItemRowProps {
 export interface PanelItemRowSlots {
   default(): VNode[]
   rail?(props: { removeClass: string }): VNode[]
+  details?(): VNode[]
 }
 </script>
 
@@ -37,5 +38,8 @@ const styles = computed(() => tv(itemRowTheme)())
     <div v-if="$slots.rail" :class="styles.rail({ class: ui?.rail })" data-slot="rail">
       <slot name="rail" :remove-class="styles.remove({ class: ui?.remove })" />
     </div>
+    <div v-if="$slots.details" :class="styles.details({ class: ui?.details })" data-slot="details">
+      <slot name="details" />
+    </div>
   </div>
 </template>
diff --git a/src/components/ui/panel/PanelRail.vue b/src/components/ui/panel/PanelRail.vue
deleted file mode 100644
index b555846f0..000000000
--- a/src/components/ui/panel/PanelRail.vue
+++ /dev/null
@@ -1,28 +0,0 @@
-<script lang="ts">
-import type { VNode } from 'vue'
-import type { ClassValue } from 'tailwind-variants'
-
-export interface PanelRailProps {
-  class?: ClassValue
-}
-
-export interface PanelRailSlots {
-  default(): VNode[]
-}
-</script>
-
-<script setup lang="ts">
-import { tv } from 'tailwind-variants'
-
-import theme from '@/theme/panel/rail'
-
-const { class: className } = defineProps<PanelRailProps>()
-defineSlots<PanelRailSlots>()
-const panelRail = tv(theme)
-</script>
-
-<template>
-  <div data-slot="root" data-panel-rail :class="panelRail({ class: className })">
-    <slot />
-  </div>
-</template>
diff --git a/src/components/ui/panel/index.ts b/src/components/ui/panel/index.ts
index 48243ae6d..07e942659 100644
--- a/src/components/ui/panel/index.ts
+++ b/src/components/ui/panel/index.ts
@@ -2,5 +2,4 @@ export { default as PanelFieldGroup } from './PanelFieldGroup.vue'
 export { default as PanelGrid } from './PanelGrid.vue'
 export { default as PanelHeader } from './PanelHeader.vue'
 export { default as PanelItemRow } from './PanelItemRow.vue'
-export { default as PanelRail } from './PanelRail.vue'
 export { default as PanelSection } from './PanelSection.vue'
diff --git a/src/theme/color-slider.ts b/src/theme/color-slider.ts
index 6aed2ac0d..727ae2ea0 100644
--- a/src/theme/color-slider.ts
+++ b/src/theme/color-slider.ts
@@ -3,12 +3,12 @@ import { CHECKERBOARD_BACKGROUND } from '@/theme/checkerboard'
 export default {
   slots: {
     root: 'flex items-center gap-2',
-    label: 'w-4 shrink-0 text-[10px] font-medium text-muted',
+    label: 'w-7 shrink-0 text-[10px] font-medium text-muted',
     slider: 'relative flex h-3 flex-1 touch-none items-center rounded-md select-none',
     track: 'absolute inset-0 overflow-hidden rounded-md',
     thumb:
       'block size-3.5 rounded-full border-2 border-white shadow-sm outline-none ring-offset-1 focus-visible:ring-2 focus-visible:ring-primary',
-    input: 'w-14 shrink-0'
+    input: 'w-14 flex-none shrink-0'
   },
   variants: {
     checkerboard: {
diff --git a/src/theme/paint-field.ts b/src/theme/paint-field.ts
index 43fd39d00..29aaaa112 100644
--- a/src/theme/paint-field.ts
+++ b/src/theme/paint-field.ts
@@ -1,10 +1,10 @@
 export default {
   slots: {
     root: 'flex h-6 min-w-0 flex-1 items-center overflow-hidden rounded border border-transparent bg-panel-field text-[11px] transition-colors hover:bg-panel-field-hover focus-within:border-panel-focus focus-within:bg-panel-field-hover',
-    preview: 'flex shrink-0 items-center pl-0.5',
-    value: 'flex min-w-0 flex-1 items-center px-1.5',
-    divider: 'h-4 w-px shrink-0 bg-border',
-    opacity: 'h-full w-14 shrink-0',
+    preview: 'flex shrink-0 items-center pl-1',
+    value: 'flex min-w-0 flex-1 items-center pl-1.5 pr-1',
+    divider: 'h-4 w-px shrink-0 bg-muted/40',
+    opacity: 'h-full w-12 flex-none shrink-0',
     binding: 'flex shrink-0 items-center pr-0.5'
   }
 } as const
diff --git a/src/theme/panel/grid.ts b/src/theme/panel/grid.ts
index 387c36538..df5ae2735 100644
--- a/src/theme/panel/grid.ts
+++ b/src/theme/panel/grid.ts
@@ -1,17 +1,24 @@
 const panelGridTheme = {
-  base: 'grid min-w-0 items-end gap-1.5',
+  base: [
+    'flex min-w-0 items-end gap-1.5',
+    '[&>[data-slot=fields]]:grid [&>[data-slot=fields]]:min-w-0 [&>[data-slot=fields]]:flex-1 [&>[data-slot=fields]]:items-end [&>[data-slot=fields]]:gap-1.5',
+    '[&>[data-slot=actions]]:flex [&>[data-slot=actions]]:h-6 [&>[data-slot=actions]]:min-w-[26px] [&>[data-slot=actions]]:shrink-0 [&>[data-slot=actions]]:items-center [&>[data-slot=actions]]:justify-end [&>[data-slot=actions]]:gap-0.5',
+    '[&>[data-slot=actions]_[data-slot=icon-button]]:size-6 [&>[data-slot=actions]_[data-slot=icon-button]]:rounded'
+  ],
   variants: {
     columns: {
-      two: 'grid-cols-2',
-      three: 'grid-cols-3',
-      appearance: 'grid-cols-[minmax(0,7fr)_minmax(0,5fr)]',
-      'two-rail': 'grid-cols-[minmax(0,1fr)_minmax(0,1fr)_26px]',
-      fill: 'grid-cols-[minmax(0,1fr)]',
-      'fill-rail': 'grid-cols-[minmax(0,1fr)_26px]'
+      1: '[&>[data-slot=fields]]:grid-cols-1',
+      2: '[&>[data-slot=fields]]:grid-cols-2',
+      3: '[&>[data-slot=fields]]:grid-cols-3'
+    },
+    distribution: {
+      equal: '',
+      'wide-first': '[&>[data-slot=fields]]:grid-cols-[minmax(0,7fr)_minmax(0,5fr)]'
     }
   },
   defaultVariants: {
-    columns: 'two-rail' as const
+    columns: 1 as const,
+    distribution: 'equal' as const
   }
 }
 
diff --git a/src/theme/panel/item-row.ts b/src/theme/panel/item-row.ts
index 32410b21e..84266c543 100644
--- a/src/theme/panel/item-row.ts
+++ b/src/theme/panel/item-row.ts
@@ -1,9 +1,9 @@
 export default {
   slots: {
-    root: 'group flex min-h-6 items-center gap-1.5 py-0.5',
-    content: 'flex min-w-0 flex-1 items-center gap-1.5',
+    root: 'group grid min-h-6 grid-cols-[minmax(0,1fr)_auto] items-center gap-x-1.5 gap-y-1.5 py-0.5',
+    content: 'flex min-w-0 items-center gap-1.5',
     rail: 'flex shrink-0 items-center gap-0.5',
-    remove:
-      'transition-opacity [@media(hover:hover)]:pointer-events-none [@media(hover:hover)]:opacity-0 group-hover:pointer-events-auto group-hover:opacity-100 group-focus-within:pointer-events-auto group-focus-within:opacity-100'
+    details: 'col-span-2 min-w-0',
+    remove: ''
   }
 } as const
diff --git a/src/theme/panel/rail.ts b/src/theme/panel/rail.ts
deleted file mode 100644
index 16e3a82ba..000000000
--- a/src/theme/panel/rail.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export default {
-  base: 'flex h-6 w-[26px] shrink-0 items-center justify-end gap-0.5 [&_[data-slot=icon-button]]:size-6 [&_[data-slot=icon-button]]:rounded'
-}
diff --git a/tests/e2e/design/panel.spec.ts b/tests/e2e/design/panel.spec.ts
index 7bde29a7a..7e4950edd 100644
--- a/tests/e2e/design/panel.spec.ts
+++ b/tests/e2e/design/panel.spec.ts
@@ -89,9 +89,19 @@ test('fill section appears with default fill', async () => {
   await expect(fillItems.first()).toBeVisible()
 })
 
-test('fill item shows color swatch', async () => {
+test('fill item shows color swatch and full hex value', async () => {
   const swatch = fillSection().getByTestId('fill-picker-swatch').first()
   await expect(swatch).toBeVisible()
+
+  const fillItem = propertyItems(editor.page, 'fills').first()
+  await expect(fillItem.getByRole('button', { name: 'Remove fill' })).toBeVisible()
+  const hex = fillItem.locator('[data-property="color-hex"]')
+  const metrics = await hex.evaluate((element) => ({
+    fits: element.scrollWidth <= element.clientWidth,
+    clientWidth: element.clientWidth,
+    scrollWidth: element.scrollWidth
+  }))
+  expect(metrics.fits, JSON.stringify(metrics)).toBe(true)
 })
 
 test('clicking color area changes fill color', async () => {
@@ -129,6 +139,9 @@ test('adding a stroke creates stroke section item', async () => {
 
   const strokeItems = propertyItems(editor.page, 'strokes')
   await expect(strokeItems.first()).toBeVisible()
+  await expect(strokeItems.first().getByRole('button', { name: 'Remove stroke' })).toBeVisible()
+  const hex = strokeItems.first().locator('[data-property="color-hex"]')
+  expect(await hex.evaluate((element) => element.scrollWidth <= element.clientWidth)).toBe(true)
 
   const id = await getSelectedId()
   const node = await getNode(expectDefined(id, 'selected id'))
@@ -148,7 +161,7 @@ test('adding an effect creates effect item', async () => {
   expect(expectDefined(node, 'node node').effects.length).toBe(1)
 })
 
-test('effect settings expand semantically and row remove reveals on hover', async () => {
+test('effect settings expand semantically and row remove stays visible', async () => {
   const effectItem = propertyItems(editor.page, 'effects').first()
   const expand = effectItem.locator('[data-property="effect-expand"]')
   await expect(expand).toHaveAttribute('aria-expanded', 'false')
@@ -160,8 +173,6 @@ test('effect settings expand semantically and row remove reveals on hover', asyn
   await expect(remove).toHaveCSS('opacity', '1')
   await editor.page.getByRole('tab', { name: 'Design' }).focus()
   await editor.page.mouse.move(0, 0)
-  await expect(remove).toHaveCSS('opacity', '0')
-  await effectItem.hover()
   await expect(remove).toHaveCSS('opacity', '1')
 })
 
diff --git a/tests/e2e/design/panel.spec.ts-snapshots/design-panel-paint-effects-export-openpencil-darwin.png b/tests/e2e/design/panel.spec.ts-snapshots/design-panel-paint-effects-export-openpencil-darwin.png
index 2d60b6f6c..eec76c3c1 100644
Binary files a/tests/e2e/design/panel.spec.ts-snapshots/design-panel-paint-effects-export-openpencil-darwin.png and b/tests/e2e/design/panel.spec.ts-snapshots/design-panel-paint-effects-export-openpencil-darwin.png differ
diff --git a/tests/e2e/design/panel.spec.ts-snapshots/design-panel-position-appearance-openpencil-darwin.png b/tests/e2e/design/panel.spec.ts-snapshots/design-panel-position-appearance-openpencil-darwin.png
index 284c63e42..d1119455e 100644
Binary files a/tests/e2e/design/panel.spec.ts-snapshots/design-panel-position-appearance-openpencil-darwin.png and b/tests/e2e/design/panel.spec.ts-snapshots/design-panel-position-appearance-openpencil-darwin.png differ
diff --git a/tests/e2e/panels/visual.spec.ts-snapshots/single-rectangle-openpencil-darwin.png b/tests/e2e/panels/visual.spec.ts-snapshots/single-rectangle-openpencil-darwin.png
index a8ed67d99..c4cf342a9 100644
Binary files a/tests/e2e/panels/visual.spec.ts-snapshots/single-rectangle-openpencil-darwin.png and b/tests/e2e/panels/visual.spec.ts-snapshots/single-rectangle-openpencil-darwin.png differ