diff --git a/craft/src/components/layout/ColumnLayout.toHtml.test.ts b/craft/src/components/layout/ColumnLayout.toHtml.test.ts
index 90c6770..af7d827 100644
--- a/craft/src/components/layout/ColumnLayout.toHtml.test.ts
+++ b/craft/src/components/layout/ColumnLayout.toHtml.test.ts
@@ -80,3 +80,56 @@ describe('ColumnLayout.toHtml XSS hardening (gap into <style>)', () => {
     expect(html).toMatch(/calc\(50% - 24px\)/);
   });
 });
+
+describe('ColumnLayout.toHtml vertical alignment (align-items on the flex row)', () => {
+  test('style.alignItems flows into the emitted style attribute (aligns uneven columns)', () => {
+    const { html } = toHtml({ columns: 2, split: '50-50', gap: '16px', style: { alignItems: 'center' } }, '<div>A</div><div>B</div>');
+    expect(html).toContain('align-items:center');
+  });
+});
+
+describe('ColumnLayout.toHtml box-model styles (margin/padding/border/shadow/opacity)', () => {
+  test('margin/padding/border/box-shadow/opacity all flow into the emitted style attribute', () => {
+    const { html } = toHtml(
+      {
+        columns: 2,
+        split: '50-50',
+        gap: '16px',
+        style: {
+          marginTop: '10px', marginRight: '10px', marginBottom: '10px', marginLeft: '10px',
+          paddingTop: '5px',
+          border: '2px solid #ff0000',
+          boxShadow: '0 4px 8px rgba(0,0,0,0.12)',
+          opacity: '0.8',
+        },
+      },
+      '<div>A</div><div>B</div>',
+    );
+    expect(html).toContain('margin-top:10px');
+    expect(html).toContain('padding-top:5px');
+    expect(html).toContain('border:2px solid #ff0000');
+    expect(html).toContain('box-shadow:0 4px 8px rgba(0,0,0,0.12)');
+    expect(html).toContain('opacity:0.8');
+  });
+});
+
+describe('ColumnLayout.craft.props exposes the vertical-alignment/box-model/animation/visibility rollout', () => {
+  test('animation, animationDelay, hideOnDesktop/Tablet/Mobile are present with blank/false defaults', () => {
+    const props = (ColumnLayout as any).craft.props;
+    expect(props.animation).toBe('');
+    expect(props.animationDelay).toBe('0');
+    expect(props.hideOnDesktop).toBe(false);
+    expect(props.hideOnTablet).toBe(false);
+    expect(props.hideOnMobile).toBe(false);
+  });
+
+  test('style carries blank/default alignItems and box-model keys', () => {
+    const style = (ColumnLayout as any).craft.props.style;
+    expect(style).toHaveProperty('alignItems');
+    expect(style).toHaveProperty('marginTop');
+    expect(style).toHaveProperty('paddingTop');
+    expect(style.border).toBe('none');
+    expect(style.boxShadow).toBe('none');
+    expect(style.opacity).toBe('1');
+  });
+});
diff --git a/craft/src/components/layout/ColumnLayout.tsx b/craft/src/components/layout/ColumnLayout.tsx
index d0306ae..64904d5 100644
--- a/craft/src/components/layout/ColumnLayout.tsx
+++ b/craft/src/components/layout/ColumnLayout.tsx
@@ -20,6 +20,11 @@ interface ColumnLayoutProps {
   style?: CSSProperties;
   children?: React.ReactNode;
   anchorId?: string;
+  hideOnDesktop?: boolean;
+  hideOnTablet?: boolean;
+  hideOnMobile?: boolean;
+  animation?: string;
+  animationDelay?: string;
 }
 
 const splitToWidths: Record<string, string[]> = {
@@ -102,8 +107,20 @@ ColumnLayout.craft = {
     columns: 2,
     split: '50-50',
     gap: '16px',
-    style: {},
+    style: {
+      alignItems: '',
+      marginTop: '', marginRight: '', marginBottom: '', marginLeft: '',
+      paddingTop: '', paddingRight: '', paddingBottom: '', paddingLeft: '',
+      border: 'none',
+      boxShadow: 'none',
+      opacity: '1',
+    },
     anchorId: '',
+    animation: '',
+    animationDelay: '0',
+    hideOnDesktop: false,
+    hideOnTablet: false,
+    hideOnMobile: false,
   },
   rules: {
     canDrag: () => true,
diff --git a/craft/src/components/layout/Container.toHtml.test.ts b/craft/src/components/layout/Container.toHtml.test.ts
index a08a0cb..f8370c2 100644
--- a/craft/src/components/layout/Container.toHtml.test.ts
+++ b/craft/src/components/layout/Container.toHtml.test.ts
@@ -63,3 +63,88 @@ describe('Container.toHtml tag allowlist (adversarial re-review, same class as C
     }
   });
 });
+
+describe('Container.toHtml vertical alignment (justify-content + min-height)', () => {
+  // Regression lock: Container/Section must NOT unconditionally become a
+  // flex container. Flex-blockifies in-flow children, forcing components
+  // that deliberately render display:inline-block (ButtonLink, Icon) to
+  // stack vertically instead of sitting side-by-side -- a real visual
+  // regression for existing published pages that never touch vertical
+  // alignment.
+  test('does NOT become a flex container when no vertical alignment is set (plain block flow preserved)', () => {
+    const { html } = toHtml({}, 'child');
+    expect(html).not.toContain('display:flex');
+    expect(html).not.toContain('flex-direction');
+  });
+
+  test('does NOT become a flex container from min-height alone (min-height must not itself trigger flex)', () => {
+    const { html } = toHtml({ style: { minHeight: '400px' } }, 'child');
+    expect(html).not.toContain('display:flex');
+    expect(html).not.toContain('flex-direction');
+    expect(html).toContain('min-height:400px');
+  });
+
+  test('becomes a column flex container when style.justifyContent is set (feature still works)', () => {
+    const { html } = toHtml({ style: { justifyContent: 'center' } }, 'child');
+    expect(html).toContain('display:flex');
+    expect(html).toContain('flex-direction:column');
+    expect(html).toContain('justify-content:center');
+  });
+
+  test('style.minHeight flows into the emitted style attribute', () => {
+    const { html } = toHtml({ style: { minHeight: '400px' } }, 'child');
+    expect(html).toContain('min-height:400px');
+  });
+
+  test('justify-content and min-height still flow through in boxed (contentWidth) mode', () => {
+    const { html } = toHtml({ contentWidth: 'boxed', style: { justifyContent: 'flex-end', minHeight: '500px' } }, 'child');
+    expect(html).toContain('display:flex');
+    expect(html).toContain('flex-direction:column');
+    expect(html).toContain('justify-content:flex-end');
+    expect(html).toContain('min-height:500px');
+  });
+});
+
+describe('Container.toHtml box-model styles (margin/padding/border/shadow/opacity)', () => {
+  test('margin/padding/border/box-shadow/opacity all flow into the emitted style attribute', () => {
+    const { html } = toHtml(
+      {
+        style: {
+          marginTop: '10px', marginRight: '10px', marginBottom: '10px', marginLeft: '10px',
+          paddingTop: '5px',
+          border: '2px solid #ff0000',
+          boxShadow: '0 4px 8px rgba(0,0,0,0.12)',
+          opacity: '0.8',
+        },
+      },
+      'child',
+    );
+    expect(html).toContain('margin-top:10px');
+    expect(html).toContain('padding-top:5px');
+    expect(html).toContain('border:2px solid #ff0000');
+    expect(html).toContain('box-shadow:0 4px 8px rgba(0,0,0,0.12)');
+    expect(html).toContain('opacity:0.8');
+  });
+});
+
+describe('Container.craft.props exposes the vertical-alignment/box-model/animation/visibility rollout', () => {
+  test('animation, animationDelay, hideOnDesktop/Tablet/Mobile are present with blank/false defaults', () => {
+    const props = (Container as any).craft.props;
+    expect(props.animation).toBe('');
+    expect(props.animationDelay).toBe('0');
+    expect(props.hideOnDesktop).toBe(false);
+    expect(props.hideOnTablet).toBe(false);
+    expect(props.hideOnMobile).toBe(false);
+  });
+
+  test('style carries blank/default vertical-alignment and box-model keys', () => {
+    const style = (Container as any).craft.props.style;
+    expect(style).toHaveProperty('justifyContent');
+    expect(style).toHaveProperty('minHeight');
+    expect(style).toHaveProperty('marginTop');
+    expect(style).toHaveProperty('paddingTop');
+    expect(style.border).toBe('none');
+    expect(style.boxShadow).toBe('none');
+    expect(style.opacity).toBe('1');
+  });
+});
diff --git a/craft/src/components/layout/Container.tsx b/craft/src/components/layout/Container.tsx
index 892ed2a..0f6cedc 100644
--- a/craft/src/components/layout/Container.tsx
+++ b/craft/src/components/layout/Container.tsx
@@ -43,6 +43,20 @@ const flexAlignFromTextAlign = (textAlign: CSSProperties['textAlign']): CSSPrope
   return {};
 };
 
+// Container only becomes display:flex/flex-direction:column at its root
+// (both in the editor render below and in toHtml) when the user has
+// actually set `style.justifyContent` (the Vertical Alignment control,
+// paired with `style.minHeight`) -- i.e. the flex conversion is gated on
+// vertical-align actually being in use, not unconditional. In-flow children
+// of a flex container get CSS-blockified, which would force components that
+// deliberately render `display:inline-block` (ButtonLink, Icon) to stack
+// vertically instead of sitting side-by-side -- a real visual regression for
+// any container/section that never touches vertical alignment, not a no-op.
+// So plain block flow (no `display`/`flex-direction` at all) is preserved
+// unless vertical-align is set. `flexAlignFromTextAlign` above still
+// supplies its own conditional flex conversion (cross-axis alignItems from
+// `textAlign`) independently -- unrelated to this gate.
+
 export const Container: UserComponent<ContainerProps> = ({
   style = {},
   tag = 'div',
@@ -58,10 +72,12 @@ export const Container: UserComponent<ContainerProps> = ({
   const safeTag = sanitizeContainerTag(tag);
   const needsBoxedWrapper = contentWidth === 'boxed';
   const flexStyles = flexAlignFromTextAlign(style.textAlign);
+  const hasVerticalAlign = !!style.justifyContent;
 
   const outerStyle: CSSProperties = {
     minHeight: '40px',
     ...style,
+    ...(hasVerticalAlign ? { display: 'flex', flexDirection: 'column' } : {}),
     ...(fullWidth ? { width: '100vw', marginLeft: 'calc(-50vw + 50%)' } : {}),
     ...(needsBoxedWrapper ? {} : flexStyles),
   };
@@ -93,13 +109,27 @@ export const Container: UserComponent<ContainerProps> = ({
 Container.craft = {
   displayName: 'Container',
   props: {
-    style: { padding: '20px', minHeight: '100px' },
+    style: {
+      padding: '20px',
+      minHeight: '100px',
+      justifyContent: '',
+      marginTop: '', marginRight: '', marginBottom: '', marginLeft: '',
+      paddingTop: '', paddingRight: '', paddingBottom: '', paddingLeft: '',
+      border: 'none',
+      boxShadow: 'none',
+      opacity: '1',
+    },
     tag: 'div',
     fullWidth: false,
     contentWidth: 'full',
     anchorId: '',
     cssId: '',
     cssClass: '',
+    animation: '',
+    animationDelay: '0',
+    hideOnDesktop: false,
+    hideOnTablet: false,
+    hideOnMobile: false,
   },
   rules: {
     canDrag: () => true,
@@ -114,9 +144,11 @@ Container.craft = {
   const tag = sanitizeContainerTag(props.tag);
   const isBoxed = props.contentWidth === 'boxed';
   const flexStyles = flexAlignFromTextAlign(props.style?.textAlign);
+  const hasVerticalAlign = !!props.style?.justifyContent;
 
   const outerCss: CSSProperties = {
     ...props.style,
+    ...(hasVerticalAlign ? { display: 'flex', flexDirection: 'column' } : {}),
     ...(isBoxed ? {} : flexStyles),
   };
 
diff --git a/craft/src/components/layout/Section.toHtml.test.ts b/craft/src/components/layout/Section.toHtml.test.ts
index 316661d..0d9afa8 100644
--- a/craft/src/components/layout/Section.toHtml.test.ts
+++ b/craft/src/components/layout/Section.toHtml.test.ts
@@ -73,3 +73,78 @@ describe('Section.toHtml shape divider color/height XSS hardening', () => {
     expect(html).not.toContain('<svg');
   });
 });
+
+describe('Section.toHtml vertical alignment (justify-content + min-height)', () => {
+  // Regression lock: same rationale as Container -- see Container.toHtml.test.ts.
+  // Section must not unconditionally become a flex container, or it
+  // blockifies inline-block children (ButtonLink, Icon) that are meant to
+  // sit side-by-side in existing published sections.
+  test('does NOT become a flex container when no vertical alignment is set (plain block flow preserved)', () => {
+    const { html } = toHtml({}, 'child');
+    expect(html).not.toContain('display:flex');
+    expect(html).not.toContain('flex-direction');
+  });
+
+  test('does NOT become a flex container from min-height alone (min-height must not itself trigger flex)', () => {
+    const { html } = toHtml({ style: { minHeight: '600px' } }, 'child');
+    expect(html).not.toContain('display:flex');
+    expect(html).not.toContain('flex-direction');
+    expect(html).toContain('min-height:600px');
+  });
+
+  test('becomes a column flex container when style.justifyContent is set (feature still works)', () => {
+    const { html } = toHtml({ style: { justifyContent: 'center' } }, 'child');
+    expect(html).toContain('display:flex');
+    expect(html).toContain('flex-direction:column');
+    expect(html).toContain('justify-content:center');
+  });
+
+  test('style.minHeight flows into the emitted style attribute', () => {
+    const { html } = toHtml({ style: { minHeight: '600px' } }, 'child');
+    expect(html).toContain('min-height:600px');
+  });
+});
+
+describe('Section.toHtml box-model styles (margin/padding/border/shadow/opacity)', () => {
+  test('margin/padding/border/box-shadow/opacity all flow into the emitted style attribute', () => {
+    const { html } = toHtml(
+      {
+        style: {
+          marginTop: '10px', marginRight: '10px', marginBottom: '10px', marginLeft: '10px',
+          paddingTop: '5px',
+          border: '2px solid #ff0000',
+          boxShadow: '0 4px 8px rgba(0,0,0,0.12)',
+          opacity: '0.8',
+        },
+      },
+      'child',
+    );
+    expect(html).toContain('margin-top:10px');
+    expect(html).toContain('padding-top:5px');
+    expect(html).toContain('border:2px solid #ff0000');
+    expect(html).toContain('box-shadow:0 4px 8px rgba(0,0,0,0.12)');
+    expect(html).toContain('opacity:0.8');
+  });
+});
+
+describe('Section.craft.props exposes the vertical-alignment/box-model/animation/visibility rollout', () => {
+  test('animation, animationDelay, hideOnDesktop/Tablet/Mobile are present with blank/false defaults', () => {
+    const props = (Section as any).craft.props;
+    expect(props.animation).toBe('');
+    expect(props.animationDelay).toBe('0');
+    expect(props.hideOnDesktop).toBe(false);
+    expect(props.hideOnTablet).toBe(false);
+    expect(props.hideOnMobile).toBe(false);
+  });
+
+  test('style carries blank/default vertical-alignment and box-model keys', () => {
+    const style = (Section as any).craft.props.style;
+    expect(style).toHaveProperty('justifyContent');
+    expect(style).toHaveProperty('minHeight');
+    expect(style).toHaveProperty('marginTop');
+    expect(style).toHaveProperty('paddingTop');
+    expect(style.border).toBe('none');
+    expect(style.boxShadow).toBe('none');
+    expect(style.opacity).toBe('1');
+  });
+});
diff --git a/craft/src/components/layout/Section.tsx b/craft/src/components/layout/Section.tsx
index 159ff5d..a425e8f 100644
--- a/craft/src/components/layout/Section.tsx
+++ b/craft/src/components/layout/Section.tsx
@@ -27,6 +27,11 @@ interface SectionProps {
   bottomDividerColor?: string;
   bottomDividerHeight?: string;
   anchorId?: string;
+  hideOnDesktop?: boolean;
+  hideOnTablet?: boolean;
+  hideOnMobile?: boolean;
+  animation?: string;
+  animationDelay?: string;
 }
 
 /* ---------- Divider renderer ---------- */
@@ -98,6 +103,13 @@ export const Section: UserComponent<SectionProps> = ({
 
   const hasTopDivider = topDivider && topDivider !== 'none';
   const hasBottomDivider = bottomDivider && bottomDivider !== 'none';
+  // Section's root only becomes a column flex container when the user has
+  // actually set `style.justifyContent` (Vertical Alignment control, paired
+  // with `style.minHeight`) -- see the matching note in Container.tsx for
+  // why an unconditional conversion is a real regression (blockifies
+  // deliberately inline-block children like ButtonLink/Icon) rather than a
+  // no-op, so plain block flow is preserved unless vertical-align is set.
+  const hasVerticalAlign = !!style.justifyContent;
 
   return (
     <section
@@ -107,6 +119,7 @@ export const Section: UserComponent<SectionProps> = ({
         width: '100%',
         position: (hasTopDivider || hasBottomDivider) ? 'relative' : undefined,
         ...style,
+        ...(hasVerticalAlign ? { display: 'flex', flexDirection: 'column' } : {}),
       }}
     >
       {hasTopDivider && (
@@ -143,7 +156,17 @@ export const Section: UserComponent<SectionProps> = ({
 Section.craft = {
   displayName: 'Section',
   props: {
-    style: { padding: '40px 0', backgroundColor: '#ffffff' },
+    style: {
+      padding: '40px 0',
+      backgroundColor: '#ffffff',
+      minHeight: '',
+      justifyContent: '',
+      marginTop: '', marginRight: '', marginBottom: '', marginLeft: '',
+      paddingTop: '', paddingRight: '', paddingBottom: '', paddingLeft: '',
+      border: 'none',
+      boxShadow: 'none',
+      opacity: '1',
+    },
     innerMaxWidth: '1200px',
     topDivider: 'none',
     topDividerColor: '#ffffff',
@@ -152,6 +175,11 @@ Section.craft = {
     bottomDividerColor: '#ffffff',
     bottomDividerHeight: '50px',
     anchorId: '',
+    animation: '',
+    animationDelay: '0',
+    hideOnDesktop: false,
+    hideOnTablet: false,
+    hideOnMobile: false,
   },
   rules: {
     canDrag: () => true,
@@ -199,11 +227,13 @@ function buildDividerHtml(
 (Section as any).toHtml = (props: SectionProps, childrenHtml: string) => {
   const hasTopDivider = props.topDivider && props.topDivider !== 'none';
   const hasBottomDivider = props.bottomDivider && props.bottomDivider !== 'none';
+  const hasVerticalAlign = !!props.style?.justifyContent;
 
   const outerStyle = cssPropsToString({
     width: '100%',
     position: (hasTopDivider || hasBottomDivider) ? 'relative' : undefined,
     ...props.style,
+    ...(hasVerticalAlign ? { display: 'flex', flexDirection: 'column' } : {}),
   });
   const innerStyle = cssPropsToString({
     maxWidth: props.innerMaxWidth || '1200px',
diff --git a/craft/src/panels/right/styles/ContainerStylePanel.tsx b/craft/src/panels/right/styles/ContainerStylePanel.tsx
index d642b2e..ff9894a 100644
--- a/craft/src/panels/right/styles/ContainerStylePanel.tsx
+++ b/craft/src/panels/right/styles/ContainerStylePanel.tsx
@@ -10,18 +10,40 @@ import {
   ColorSwatchGrid,
   GradientSwatchGrid,
   PresetButtonGrid,
+  NumericUnitInput,
   labelStyle,
   inputStyle,
   sectionGap,
   useNodeProp,
 } from './shared';
+import { BoxModelSection, BorderEffectsSection, AnimVisSection } from './containerBoxModel';
 
-/* ---------- CONTAINER / SECTION ---------- */
+// Vertical Alignment options shown to the user identically regardless of
+// which CSS property they end up mapped to (align-items for the Columns
+// flex ROW vs. justify-content for Container/Section's flex COLUMN root --
+// see the per-type branch below).
+const VERTICAL_ALIGN_OPTIONS: { label: string; value: string }[] = [
+  { label: 'Top', value: 'flex-start' },
+  { label: 'Center', value: 'center' },
+  { label: 'Bottom', value: 'flex-end' },
+  { label: 'Stretch', value: 'stretch' },
+];
+
+/* ---------- CONTAINER / SECTION / COLUMNS ---------- */
 export const ContainerStylePanel: React.FC<StylePanelProps> = ({ selectedId, nodeProps }) => {
   const style: CSSProperties = nodeProps.style || {};
 
   const { setProp, setPropStyle } = useNodeProp(selectedId);
 
+  // ColumnLayout only ever carries `columns`/`split` props -- Container and
+  // Section never set them -- so checking either alone distinguishes the
+  // flex-ROW case (align its columns via align-items, aligning uneven
+  // column heights) from the flex-COLUMN case (Container/Section, which
+  // vertically center/position their OWN content via justify-content,
+  // paired with a Min Height control so centering is meaningful).
+  const isColumns = nodeProps.columns !== undefined || nodeProps.split !== undefined;
+  const vAlignKey = isColumns ? 'alignItems' : 'justifyContent';
+
   return (
     <>
       {nodeProps.cssId !== undefined && (
@@ -94,6 +116,30 @@ export const ContainerStylePanel: React.FC<StylePanelProps> = ({ selectedId, nod
           ))}
         </div>
       </div>
+      <div className="guided-section">
+        <SectionLabel>Vertical Alignment</SectionLabel>
+        <PresetButtonGrid
+          presets={VERTICAL_ALIGN_OPTIONS}
+          activeValue={style[vAlignKey] as string}
+          onSelect={(v) => setPropStyle(vAlignKey, v)}
+        />
+      </div>
+      {!isColumns && (
+        <div className="guided-section">
+          <SectionLabel>Min Height</SectionLabel>
+          <NumericUnitInput
+            value={(style.minHeight as string) || ''}
+            onChange={(v) => setPropStyle('minHeight', v)}
+            units={['px', 'vh', '%']}
+            placeholder="auto"
+          />
+        </div>
+      )}
+
+      {/* Box model + border/effects + animation/visibility rollout */}
+      <BoxModelSection style={style} setPropStyle={setPropStyle} />
+      <BorderEffectsSection style={style} setPropStyle={setPropStyle} />
+      <AnimVisSection nodeProps={nodeProps} setProp={setProp} />
     </>
   );
 };
diff --git a/craft/src/panels/right/styles/containerBoxModel.tsx b/craft/src/panels/right/styles/containerBoxModel.tsx
new file mode 100644
index 0000000..ca01dd5
--- /dev/null
+++ b/craft/src/panels/right/styles/containerBoxModel.tsx
@@ -0,0 +1,135 @@
+import React from 'react';
+import { SHADOW_PRESETS } from '../../../constants/presets';
+import {
+  SectionLabel,
+  PresetButtonGrid,
+  CollapsibleSection,
+  SpacingControl,
+  SpacingSide,
+  BorderControl,
+  BorderValue,
+  buildBorderShorthand,
+  AnimationControl,
+  VisibilityControl,
+  sectionGap,
+  labelStyle,
+} from './shared';
+
+/* ==========================================================================
+   Shared box-model / border+effects / animation+visibility sections for the
+   CONTAINERS package's single shared panel (ContainerStylePanel, used for
+   Container / Section / Columns). Kept local to this package (not in
+   shared.tsx, which is foundation/import-only) since it's just DRY-ing the
+   identical JSX block across those 3 components rather than a genuinely
+   cross-package reusable control. Mirrors the equivalent helper in the
+   media package (mediaBoxModel.tsx) -- same shape, independently duplicated
+   per-package by design (packages are developed and merged in parallel).
+   ========================================================================== */
+
+function capitalize(s: string): string {
+  return s.charAt(0).toUpperCase() + s.slice(1);
+}
+
+/** Parses a `border` shorthand string (e.g. "2px solid #ff0000") back into
+ *  the {width,style,color} shape BorderControl edits. Only needs to
+ *  round-trip values this same panel produced via buildBorderShorthand --
+ *  not arbitrary author-supplied CSS. */
+export function parseBorderShorthand(v: string | undefined): BorderValue {
+  if (!v || v === 'none') return { width: '', style: 'none', color: '#000000' };
+  const m = String(v).trim().match(/^(\d+(?:\.\d+)?(?:px|em|rem)?)\s+(\w+)\s+(.+)$/);
+  if (!m) return { width: '', style: 'none', color: '#000000' };
+  return { width: m[1], style: m[2], color: m[3] };
+}
+
+export interface BoxModelSectionProps {
+  style: Record<string, any>;
+  setPropStyle: (prop: string, value: string) => void;
+}
+
+/** Margin + Padding, per-side, via the shared SpacingControl. */
+export const BoxModelSection: React.FC<BoxModelSectionProps> = ({ style, setPropStyle }) => {
+  const sideSetter = (kind: 'margin' | 'padding') => (side: SpacingSide, value: string) =>
+    setPropStyle(`${kind}${capitalize(side)}`, value);
+
+  return (
+    <CollapsibleSection title="Spacing" defaultOpen={false}>
+      <SpacingControl
+        label="Margin"
+        value={{ top: style.marginTop, right: style.marginRight, bottom: style.marginBottom, left: style.marginLeft }}
+        onChange={sideSetter('margin')}
+      />
+      <SpacingControl
+        label="Padding"
+        value={{ top: style.paddingTop, right: style.paddingRight, bottom: style.paddingBottom, left: style.paddingLeft }}
+        onChange={sideSetter('padding')}
+      />
+    </CollapsibleSection>
+  );
+};
+
+/** style.opacity is stored as a CSS-length-free numeric string ("0.8") or
+ *  may be blank/undefined (treated as fully opaque). Converts to a 0-100
+ *  integer for the range input / label. */
+function opacityPercent(v: unknown): number {
+  if (v === undefined || v === null || v === '') return 100;
+  const n = parseFloat(String(v));
+  return Number.isFinite(n) ? Math.round(n * 100) : 100;
+}
+
+export interface BorderEffectsSectionProps {
+  style: Record<string, any>;
+  setPropStyle: (prop: string, value: string) => void;
+}
+
+/** Border (width/style/color) + box-shadow preset + opacity slider. */
+export const BorderEffectsSection: React.FC<BorderEffectsSectionProps> = ({ style, setPropStyle }) => (
+  <CollapsibleSection title="Border & Effects" defaultOpen={false}>
+    <BorderControl
+      value={parseBorderShorthand(style.border)}
+      onChange={(v) => setPropStyle('border', buildBorderShorthand(v))}
+    />
+    <div className="guided-section">
+      <SectionLabel>Shadow</SectionLabel>
+      <PresetButtonGrid presets={SHADOW_PRESETS} activeValue={style.boxShadow} onSelect={(v) => setPropStyle('boxShadow', v)} />
+    </div>
+    <div style={sectionGap}>
+      <label style={labelStyle}>Opacity: {opacityPercent(style.opacity)}%</label>
+      <input
+        type="range"
+        min={0}
+        max={100}
+        value={opacityPercent(style.opacity)}
+        onChange={(e) => setPropStyle('opacity', String(Number(e.target.value) / 100))}
+        style={{ width: '100%' }}
+      />
+    </div>
+  </CollapsibleSection>
+);
+
+export interface AnimVisSectionProps {
+  nodeProps: Record<string, any>;
+  setProp: (key: string, value: any) => void;
+}
+
+/** Entrance animation + responsive hide toggles -- top-level props consumed
+ *  directly by html-export.ts's buildDataAttrs (no toHtml change needed). */
+export const AnimVisSection: React.FC<AnimVisSectionProps> = ({ nodeProps, setProp }) => (
+  <CollapsibleSection title="Animation & Visibility" defaultOpen={false}>
+    <AnimationControl
+      value={{ animation: nodeProps.animation || 'none', animationDelay: nodeProps.animationDelay }}
+      onChange={(v) => { setProp('animation', v.animation); setProp('animationDelay', v.animationDelay); }}
+    />
+    <VisibilityControl
+      value={{
+        hideOnDesktop: nodeProps.hideOnDesktop,
+        hideOnTablet: nodeProps.hideOnTablet,
+        hideOnMobile: nodeProps.hideOnMobile,
+      }}
+      onChange={(v) => {
+        setProp('hideOnDesktop', !!v.hideOnDesktop);
+        setProp('hideOnTablet', !!v.hideOnTablet);
+        setProp('hideOnMobile', !!v.hideOnMobile);
+      }}
+    />
+  </CollapsibleSection>
+);