diff --git a/demo/story-components/story-styles-settings.test.ts b/demo/story-components/story-styles-settings.test.ts
new file mode 100644
index 0000000..cb7b943
--- /dev/null
+++ b/demo/story-components/story-styles-settings.test.ts
@@ -0,0 +1,174 @@
+import { fixture } from '@open-wc/testing-helpers';
+import { describe, expect, test } from 'vitest';
+import { html } from 'lit';
+
+import type {
+  StoryStylesSettings,
+  StyleInputData,
+} from './story-styles-settings';
+import './story-styles-settings';
+
+async function makeSettings(
+  data: StyleInputData,
+): Promise<StoryStylesSettings> {
+  const el = await fixture<StoryStylesSettings>(html`
+    <story-styles-settings .styleInputData=${data}></story-styles-settings>
+  `);
+  await el.updateComplete;
+  return el;
+}
+
+function getInput(el: StoryStylesSettings, id: string): HTMLInputElement {
+  const input = el.shadowRoot?.querySelector<HTMLInputElement>(`#${id}`);
+  expect(input, `input #${id} should exist`).to.exist;
+  return input as HTMLInputElement;
+}
+
+describe('StoryStylesSettings', () => {
+  describe('range inputs', () => {
+    const rangeData: StyleInputData = {
+      settings: [
+        {
+          label: 'Foos',
+          cssVariable: '--foo',
+          defaultValue: 50,
+          inputType: 'range',
+          min: 0,
+          max: 250,
+          step: 10,
+          unit: 'px',
+        },
+      ],
+    };
+
+    test('renders an input of type range with min/max/step set', async () => {
+      const el = await makeSettings(rangeData);
+      const input = getInput(el, 'foos');
+
+      expect(input.type).to.equal('range');
+      expect(input.min).to.equal('0');
+      expect(input.max).to.equal('250');
+      expect(input.step).to.equal('10');
+      expect(input.value).to.equal('50');
+      expect(input.dataset.unit).to.equal('px');
+    });
+
+    test('renders a readout linked to the input', async () => {
+      const el = await makeSettings(rangeData);
+
+      const readout = el.shadowRoot?.querySelector<HTMLOutputElement>(
+        'output.style-readout',
+      );
+      expect(readout).to.exist;
+      expect(readout?.getAttribute('for')).to.equal('foos');
+      expect(readout?.textContent).to.equal('50px');
+    });
+
+    test('readout updates on input event with value + unit', async () => {
+      const el = await makeSettings(rangeData);
+      const input = getInput(el, 'foos');
+
+      input.value = '200';
+      input.dispatchEvent(new Event('input'));
+      await el.updateComplete;
+
+      const readout = el.shadowRoot?.querySelector<HTMLOutputElement>(
+        'output.style-readout',
+      );
+      expect(readout?.textContent).to.equal('200px');
+    });
+
+    test('readout omits unit when unit is not provided', async () => {
+      const el = await makeSettings({
+        settings: [
+          {
+            label: 'Foos',
+            cssVariable: '--foo',
+            defaultValue: 0.5,
+            inputType: 'range',
+            min: 0,
+            max: 1,
+            step: 0.1,
+          },
+        ],
+      });
+      const input = getInput(el, 'foos');
+
+      const readout = el.shadowRoot?.querySelector<HTMLOutputElement>(
+        'output.style-readout',
+      );
+      expect(readout?.textContent).to.equal('0.5');
+
+      input.value = '0.8';
+      input.dispatchEvent(new Event('input'));
+      await el.updateComplete;
+
+      expect(readout?.textContent).to.equal('0.8'); // No unit included
+    });
+  });
+
+  describe('number inputs', () => {
+    const numberData: StyleInputData = {
+      settings: [
+        {
+          label: 'Foos',
+          cssVariable: '--foo',
+          defaultValue: 1,
+          inputType: 'number',
+          min: 0,
+          step: 1,
+        },
+      ],
+    };
+
+    test('renders an input of type number with min/step set', async () => {
+      const el = await makeSettings(numberData);
+      const input = getInput(el, 'foos');
+
+      expect(input.type).to.equal('number');
+      expect(input.min).to.equal('0');
+      expect(input.step).to.equal('1');
+      expect(input.value).to.equal('1');
+    });
+  });
+
+  describe('non-numeric inputs', () => {
+    test('text input ignores min/max/step even when set on the settings object', async () => {
+      const el = await makeSettings({
+        settings: [
+          {
+            label: 'Foos',
+            cssVariable: '--foos',
+            defaultValue: '200px',
+            inputType: 'text',
+            // These should be ignored for non-numeric input types
+            min: 0,
+            max: 100,
+            step: 1,
+          },
+        ],
+      });
+      const input = getInput(el, 'foos');
+
+      expect(input.type).to.equal('text');
+      expect(input.hasAttribute('min')).to.be.false;
+      expect(input.hasAttribute('max')).to.be.false;
+      expect(input.hasAttribute('step')).to.be.false;
+    });
+
+    test('input without inputType defaults to type=text', async () => {
+      const el = await makeSettings({
+        settings: [
+          {
+            label: 'Untyped',
+            cssVariable: '--untyped',
+            defaultValue: 'foo',
+          },
+        ],
+      });
+      const input = getInput(el, 'untyped');
+
+      expect(input.type).to.equal('text');
+    });
+  });
+});
diff --git a/demo/story-components/story-styles-settings.ts b/demo/story-components/story-styles-settings.ts
index 253e764..15bd285 100644
--- a/demo/story-components/story-styles-settings.ts
+++ b/demo/story-components/story-styles-settings.ts
@@ -1,15 +1,29 @@
-import { css, html, LitElement, nothing, type CSSResultGroup } from 'lit';
+import {
+  css,
+  html,
+  LitElement,
+  nothing,
+  type CSSResultGroup,
+  type TemplateResult,
+} from 'lit';
 import { property, queryAll } from 'lit/decorators.js';
 import { customElement } from 'lit/decorators/custom-element.js';
+import { ifDefined } from 'lit/directives/if-defined.js';
 
 import themeStyles from '@src/themes/theme-styles';
 import { labelToId } from '../story-utils';
 
+export type StyleInputType = 'color' | 'text' | 'number' | 'range';
+
 export type StyleInputSettings = {
   label: string;
   cssVariable: string;
-  defaultValue?: string;
-  inputType?: 'color' | 'text';
+  defaultValue: string | number;
+  inputType?: StyleInputType;
+  min?: number;
+  max?: number;
+  step?: number;
+  unit?: string;
 };
 
 export type StyleInputData = {
@@ -32,23 +46,8 @@ export class StoryStylesSettings extends LitElement {
     return html`
       <div class="settings-options">
         <table>
-          ${this.styleInputData.settings.map(
-            (input) => html`
-              <tr>
-                <td>
-                  <label for=${labelToId(input.label)}>${input.label}</label>
-                </td>
-                <td>
-                  <input
-                    id=${labelToId(input.label)}
-                    class="style-input"
-                    type=${input.inputType ?? 'text'}
-                    value=${input.defaultValue ?? ''}
-                    data-variable=${input.cssVariable}
-                  />
-                </td>
-              </tr>
-            `,
+          ${this.styleInputData.settings.map((input) =>
+            this.renderStyleRow(input),
           )}
         </table>
         <button @click=${this.applyStyles}>Apply</button>
@@ -56,13 +55,66 @@ export class StoryStylesSettings extends LitElement {
     `;
   }
 
-  /* Applies styles to demo component. */
+  /**
+   * Renders one row of the settings table for the given style input.
+   */
+  private renderStyleRow(input: StyleInputSettings): TemplateResult {
+    const inputId = labelToId(input.label);
+    const isNumeric =
+      input.inputType === 'number' || input.inputType === 'range';
+    return html`
+      <tr>
+        <td>
+          <label for=${inputId}>${input.label}</label>
+        </td>
+        <td class="style-input-cell">
+          <input
+            id=${inputId}
+            class="style-input"
+            type=${input.inputType ?? 'text'}
+            min=${ifDefined(isNumeric ? input.min : undefined)}
+            max=${ifDefined(isNumeric ? input.max : undefined)}
+            step=${ifDefined(isNumeric ? input.step : undefined)}
+            value=${input.defaultValue}
+            data-variable=${input.cssVariable}
+            data-unit=${ifDefined(input.unit)}
+            @input=${input.inputType === 'range'
+              ? this.updateRangeReadout
+              : undefined}
+          />
+          ${input.inputType === 'range'
+            ? html`<output class="style-readout" for=${inputId}
+                >${input.defaultValue}${input.unit ?? ''}</output
+              >`
+            : nothing}
+        </td>
+      </tr>
+    `;
+  }
+
+  /**
+   * Updates the live readout next to a range slider as it moves.
+   */
+  private updateRangeReadout(e: Event): void {
+    const input = e.currentTarget as HTMLInputElement;
+    const output = this.renderRoot.querySelector<HTMLOutputElement>(
+      `output[for="${CSS.escape(input.id)}"]`,
+    );
+    if (!output) return;
+    const unit = input.dataset.unit ?? '';
+    output.textContent = `${input.value}${unit}`;
+  }
+
+  /**
+   * Applies styles to demo component.
+   */
   private applyStyles(): void {
     const appliedStyles: string[] = [];
 
     this.styleInputs?.forEach((input) => {
       if (!input.dataset.variable || !input.value) return;
-      appliedStyles.push(`${input.dataset.variable}: ${input.value};`);
+      const unit = input.dataset.unit ?? '';
+      appliedStyles.push(`${input.dataset.variable}: ${input.value}${unit};`);
     });
 
     this.dispatchEvent(
@@ -80,6 +132,20 @@ export class StoryStylesSettings extends LitElement {
           background-color: var(--primary-background-color);
           padding: 1em;
         }
+
+        .style-input-cell {
+          display: flex;
+          align-items: center;
+        }
+
+        .style-readout {
+          min-width: 3.5em;
+          text-align: right;
+        }
+
+        input[type='range'] {
+          margin: 5px;
+        }
       `,
     ];
   }
diff --git a/src/elements/ia-combo-box/ia-combo-box-story.ts b/src/elements/ia-combo-box/ia-combo-box-story.ts
index 5dd283c..5aa8060 100644
--- a/src/elements/ia-combo-box/ia-combo-box-story.ts
+++ b/src/elements/ia-combo-box/ia-combo-box-story.ts
@@ -40,6 +40,16 @@ const styleInputSettings: StyleInputSettings[] = [
     defaultValue: '250px',
     inputType: 'text',
   },
+  {
+    label: 'Dropdown fade duration',
+    cssVariable: '--combo-box-list-fade-duration',
+    defaultValue: 125,
+    inputType: 'range',
+    min: 0,
+    max: 1000,
+    step: 25,
+    unit: 'ms',
+  },
 ];
 
 // Option sets
diff --git a/src/elements/ia-combo-box/ia-combo-box.ts b/src/elements/ia-combo-box/ia-combo-box.ts
index 6e925c7..44f2187 100644
--- a/src/elements/ia-combo-box/ia-combo-box.ts
+++ b/src/elements/ia-combo-box/ia-combo-box.ts
@@ -1217,6 +1217,10 @@ export class IAComboBox extends LitElement {
         --combo-box-padding--: var(--padding-sm);
         --combo-box-list-width--: var(--combo-box-list-width, unset);
         --combo-box-list-max-height--: var(--combo-box-list-max-height, 250px);
+        --combo-box-list-fade-duration--: var(
+          --combo-box-list-fade-duration,
+          125ms
+        );
       }
 
       #container {
@@ -1317,7 +1321,7 @@ export class IAComboBox extends LitElement {
         max-height: 400px;
         box-shadow: 0 0 1px 1px #ddd;
         opacity: 0;
-        transition: opacity 0.125s ease;
+        transition: opacity var(--combo-box-list-fade-duration--) ease;
       }
 
       #options-list.visible {
diff --git a/src/elements/ia-dropdown-search-bar/ia-dropdown-search-bar-story.ts b/src/elements/ia-dropdown-search-bar/ia-dropdown-search-bar-story.ts
index db1618c..4748b8b 100644
--- a/src/elements/ia-dropdown-search-bar/ia-dropdown-search-bar-story.ts
+++ b/src/elements/ia-dropdown-search-bar/ia-dropdown-search-bar-story.ts
@@ -28,6 +28,14 @@ const styleInputSettings: StyleInputSettings[] = [
     defaultValue: '5px',
     inputType: 'text',
   },
+  {
+    label: 'Dropdown z-index',
+    cssVariable: '--dropdown-z-index',
+    defaultValue: 2,
+    inputType: 'number',
+    min: 0,
+    step: 1,
+  },
 ];
 
 // Component defaults
diff --git a/src/elements/ia-dropdown-search-bar/ia-dropdown-search-bar.ts b/src/elements/ia-dropdown-search-bar/ia-dropdown-search-bar.ts
index 0ee51c3..426d800 100644
--- a/src/elements/ia-dropdown-search-bar/ia-dropdown-search-bar.ts
+++ b/src/elements/ia-dropdown-search-bar/ia-dropdown-search-bar.ts
@@ -75,7 +75,7 @@ export class IADropdownSearchBar extends LitElement {
       </div>
     `;
   }
-  
+
   willUpdate(changed: PropertyValues) {
     // Push new categories down to the inner dropdown immediately, since ia-dropdown
     // mutates its own selected option on interaction which can cause Lit's
@@ -235,6 +235,7 @@ export class IADropdownSearchBar extends LitElement {
         --search-bar-width--: var(--search-bar-width, 300px);
         --search-bar-internal-padding--: var(--padding-sm, 5px);
         --clear-button-offset--: var(--clear-button-offset, 0);
+        --dropdown-z-index--: var(--dropdown-z-index, initial);
       }
 
       #container {
@@ -276,6 +277,7 @@ export class IADropdownSearchBar extends LitElement {
         --dropdownBorderRadius: 4px;
         --buttonSlotPaddingRight: 0;
         --dropdownTextAlign: left;
+        --dropdownListZIndex: var(--dropdown-z-index--);
       }
 
       #category-dropdown [slot='dropdown-label'] {