update

changelog.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## 2025-06-27 - 1.10.8 - feat(ui-components)
+Update multiple components with shadcn-aligned styling and improved animations
+
+- Updated dees-modal with shadcn colors, borders, and subtle shadows
+- Updated dees-chips with shadcn styling and fixed selection logic bug
+- Updated dees-dataview-codebox with shadcn syntax highlighting colors and responsive label layout
+- Updated dees-input-multitoggle with transparent blue indicator and smooth animations
+- Updated dees-appui-tabs with animated sliding indicator for both horizontal and vertical layouts
+- Fixed indicator positioning to be perfectly centered on tab content
+- Indicator width is content width + 8px for minimal visual padding
+- Adjusted tab spacing to start more to the left with tighter padding
+- Improved overall spacing and visual consistency across components
+
 ## 2025-06-27 - 1.10.1 - fix(modal)
 Improve modal overscroll behavior by adding 'overscroll-behavior: contain' to content container
 

test-output.log

@@ -0,0 +1,72 @@
+
+> @design.estate/dees-catalog@1.10.8 test /mnt/data/lossless/design.estate/dees-catalog
+> tstest test/ --web --verbose --timeout 30 --logfile test/test.tabs-indicator.browser.ts
+
+
+🔍 Test Discovery
+   Mode: file
+   Pattern: test/test.tabs-indicator.browser.ts
+   Found: 1 test file(s)
+
+▶️  test/test.tabs-indicator.browser.ts (1/1)
+   Runtime: chromium
+running spawned compilation process
+=======> ESBUILD
+{
+  cwd: '/mnt/data/lossless/design.estate/dees-catalog',
+  from: 'test/test.tabs-indicator.browser.ts',
+  to: '/mnt/data/lossless/design.estate/dees-catalog/.nogit/tstest_cache/test__test.tabs-indicator.browser.ts.js',
+  mode: 'test',
+  argv: { bundler: 'esbuild' }
+}
+switched to /mnt/data/lossless/design.estate/dees-catalog
+building for test:
+Got no SSL certificates. Please ensure encryption using e.g. a reverse proxy
+"/test" maps to 1 handlers
+ -> GET
+"*" maps to 1 handlers
+ -> GET
+now listening on 3007!
+Launching puppeteer browser with arguments:
+[]
+Using executable: /usr/bin/google-chrome
+added connection. now 1 sockets connected.
+added connection. now 2 sockets connected.
+connection ended
+removed connection. 1 sockets remaining.
+connection ended
+removed connection. 0 sockets remaining.
+added connection. now 1 sockets connected.
+/favicon.ico
+could not resolve /mnt/data/lossless/design.estate/dees-catalog/.nogit/tstest_cache/favicon.ico
+/test__test.tabs-indicator.browser.ts.js
+   Test starting: tabs indicator positioning debug
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   Using globalThis.tapPromise
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+connection ended
+removed connection. 0 sockets remaining.
+=>  Stopped test/test.tabs-indicator.browser.ts chromium instance and server.
+
+⚠️  Error
+   Only 0 out of 1 completed!
+
+⚠️  Error
+   The amount of received tests and expectedTests is unequal! Therefore the testfile failed
+   Summary: -1 passed, 1 failed of 0 tests in 2.7s
+
+📊 Test Summary
+┌────────────────────────────────┐
+│ Total Files:                 1 │
+│ Total Tests:                 0 │
+│ Passed:                      0 │
+│ Failed:                      0 │
+│ Duration:                 4.2s │
+└────────────────────────────────┘
+
+⏱️  Performance Metrics:
+   Average per test: 0ms
+
+ALL TESTS PASSED! 🎉
+Exited NOT OK!
+ ELIFECYCLE  Test failed. See above for more details.

test/test.tabs-indicator.browser.ts

@@ -0,0 +1,146 @@
+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as deesCatalog from '../ts_web/index.js';
+
+tap.test('tabs indicator positioning - detailed measurements', async () => {
+  // Create tabs element with different length labels
+  const tabsElement = new deesCatalog.DeesAppuiTabs();
+  tabsElement.tabs = [
+    { key: 'Home', iconName: 'lucide:home', action: () => {} },
+    { key: 'Analytics Dashboard', iconName: 'lucide:lineChart', action: () => {} },
+    { key: 'User Settings', iconName: 'lucide:settings', action: () => {} },
+  ];
+  
+  document.body.appendChild(tabsElement);
+  await tabsElement.updateComplete;
+  
+  // Wait for fonts and indicator initialization
+  await new Promise(resolve => setTimeout(resolve, 200));
+  
+  // Get all elements
+  const shadowRoot = tabsElement.shadowRoot;
+  const wrapper = shadowRoot.querySelector('.tabs-wrapper') as HTMLElement;
+  const container = shadowRoot.querySelector('.tabsContainer') as HTMLElement;
+  const tabs = shadowRoot.querySelectorAll('.tab');
+  const firstTab = tabs[0] as HTMLElement;
+  const firstContent = firstTab.querySelector('.tab-content') as HTMLElement;
+  const indicator = shadowRoot.querySelector('.tabIndicator') as HTMLElement;
+  
+  // Verify all elements exist
+  expect(wrapper).toBeInstanceOf(HTMLElement);
+  expect(container).toBeInstanceOf(HTMLElement);
+  expect(firstTab).toBeInstanceOf(HTMLElement);
+  expect(firstContent).toBeInstanceOf(HTMLElement);
+  expect(indicator).toBeInstanceOf(HTMLElement);
+  
+  // Get all measurements
+  const wrapperRect = wrapper.getBoundingClientRect();
+  const containerRect = container.getBoundingClientRect();
+  const tabRect = firstTab.getBoundingClientRect();
+  const contentRect = firstContent.getBoundingClientRect();
+  const indicatorRect = indicator.getBoundingClientRect();
+  
+  console.log('\n=== DETAILED MEASUREMENTS ===');
+  console.log('Document body left:', document.body.getBoundingClientRect().left);
+  console.log('Wrapper left:', wrapperRect.left);
+  console.log('Container left:', containerRect.left);
+  console.log('Tab left:', tabRect.left);
+  console.log('Content left:', contentRect.left);
+  console.log('Indicator left (actual):', indicatorRect.left);
+  
+  console.log('\n=== RELATIVE POSITIONS ===');
+  console.log('Container padding (container - wrapper):', containerRect.left - wrapperRect.left);
+  console.log('Tab position in container:', tabRect.left - containerRect.left);
+  console.log('Content position in tab:', contentRect.left - tabRect.left);
+  console.log('Content relative to wrapper:', contentRect.left - wrapperRect.left);
+  console.log('Indicator relative to wrapper (actual):', indicatorRect.left - wrapperRect.left);
+  
+  console.log('\n=== WIDTHS ===');
+  console.log('Tab width:', tabRect.width);
+  console.log('Content width:', contentRect.width);
+  console.log('Indicator width:', indicatorRect.width);
+  
+  console.log('\n=== STYLES (what we set) ===');
+  console.log('Indicator style.left:', indicator.style.left);
+  console.log('Indicator style.width:', indicator.style.width);
+  
+  console.log('\n=== CALCULATIONS ===');
+  const expectedIndicatorLeft = contentRect.left - wrapperRect.left - 4; // We subtract 4 to center
+  const expectedIndicatorWidth = contentRect.width + 8; // We add 8 in the code
+  console.log('Expected indicator left:', expectedIndicatorLeft);
+  console.log('Expected indicator width:', expectedIndicatorWidth);
+  console.log('Actual indicator left (from style):', parseFloat(indicator.style.left));
+  console.log('Actual indicator width (from style):', parseFloat(indicator.style.width));
+  
+  console.log('\n=== VISUAL ALIGNMENT CHECK ===');
+  const tabCenter = tabRect.left + (tabRect.width / 2);
+  const contentCenter = contentRect.left + (contentRect.width / 2);
+  const indicatorCenter = indicatorRect.left + (indicatorRect.width / 2);
+  
+  console.log('Tab center:', tabCenter);
+  console.log('Content center:', contentCenter);
+  console.log('Indicator center:', indicatorCenter);
+  console.log('Content offset from tab center:', contentCenter - tabCenter);
+  console.log('Indicator offset from content center:', indicatorCenter - contentCenter);
+  console.log('Indicator offset from tab center:', indicatorCenter - tabCenter);
+  console.log('---');
+  console.log('Indicator extends left of content by:', contentRect.left - indicatorRect.left);
+  console.log('Indicator extends right of content by:', (indicatorRect.left + indicatorRect.width) - (contentRect.left + contentRect.width));
+  
+  // Check if icons are rendering
+  const icon = firstContent.querySelector('dees-icon');
+  console.log('\n=== ICON CHECK ===');
+  console.log('Icon element found:', icon ? 'YES' : 'NO');
+  if (icon) {
+    const iconRect = icon.getBoundingClientRect();
+    console.log('Icon width:', iconRect.width);
+    console.log('Icon height:', iconRect.height);
+    console.log('Icon visible:', iconRect.width > 0 && iconRect.height > 0 ? 'YES' : 'NO');
+  }
+  
+  // Verify indicator is visible
+  expect(indicator.style.opacity).toEqual('1');
+  
+  // Verify positioning calculations
+  expect(parseFloat(indicator.style.left)).toBeCloseTo(expectedIndicatorLeft, 1);
+  expect(parseFloat(indicator.style.width)).toBeCloseTo(expectedIndicatorWidth, 1);
+  
+  // Verify visual centering on content (should be perfectly centered)
+  expect(Math.abs(indicatorCenter - contentCenter)).toBeLessThan(1);
+  
+  document.body.removeChild(tabsElement);
+});
+
+tap.test('tabs indicator should move when tab is clicked', async () => {
+  // Create tabs element
+  const tabsElement = new deesCatalog.DeesAppuiTabs();
+  tabsElement.tabs = [
+    { key: 'Home', iconName: 'lucide:home', action: () => {} },
+    { key: 'Analytics', iconName: 'lucide:barChart', action: () => {} },
+    { key: 'Settings', iconName: 'lucide:settings', action: () => {} },
+  ];
+  
+  document.body.appendChild(tabsElement);
+  await tabsElement.updateComplete;
+  await new Promise(resolve => setTimeout(resolve, 100));
+  
+  const shadowRoot = tabsElement.shadowRoot;
+  const tabs = shadowRoot.querySelectorAll('.tab');
+  const indicator = shadowRoot.querySelector('.tabIndicator') as HTMLElement;
+  
+  // Get initial position
+  const initialLeft = parseFloat(indicator.style.left);
+  
+  // Click second tab
+  (tabs[1] as HTMLElement).click();
+  await tabsElement.updateComplete;
+  await new Promise(resolve => setTimeout(resolve, 100));
+  
+  // Position should have changed
+  const newLeft = parseFloat(indicator.style.left);
+  expect(newLeft).not.toEqual(initialLeft);
+  expect(newLeft).toBeGreaterThan(initialLeft);
+  
+  document.body.removeChild(tabsElement);
+});
+
+export default tap.start();

ts_web/elements/dees-appui-tabs.ts

@@ -15,13 +15,92 @@ import * as domtools from '@design.estate/dees-domtools';
 @customElement('dees-appui-tabs')
 export class DeesAppuiTabs extends DeesElement {
   public static demo = () => html`
-    <dees-appui-tabs
-      .tabs=${[
-        { key: 'Tab 1', action: () => console.log('Tab 1 clicked') },
-        { key: 'Tab 2', action: () => console.log('Tab 2 clicked') },
-        { key: 'Tab 3', action: () => console.log('Tab 3 clicked') },
-      ]}
-    ></dees-appui-tabs>
+    <style>
+      .demo-container {
+        display: flex;
+        flex-direction: column;
+        gap: 32px;
+        padding: 48px;
+        background: ${cssManager.bdTheme('#f8f9fa', '#0a0a0a')};
+        min-height: 100vh;
+      }
+      
+      .section {
+        background: ${cssManager.bdTheme('#ffffff', '#18181b')};
+        border: 1px solid ${cssManager.bdTheme('#e5e7eb', '#27272a')};
+        border-radius: 8px;
+        padding: 24px;
+        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
+      }
+      
+      .section-title {
+        font-size: 18px;
+        font-weight: 600;
+        margin-bottom: 16px;
+        color: ${cssManager.bdTheme('#09090b', '#fafafa')};
+      }
+      
+      .two-column {
+        display: grid;
+        grid-template-columns: 200px 1fr;
+        gap: 24px;
+        align-items: start;
+      }
+    </style>
+    <div class="demo-container">
+      <div class="section">
+        <div class="section-title">Horizontal Tabs with Animated Indicator</div>
+        <dees-appui-tabs
+          .tabs=${[
+            { key: 'Home', iconName: 'lucide:home', action: () => console.log('Home clicked') },
+            { key: 'Analytics Dashboard', iconName: 'lucide:lineChart', action: () => console.log('Analytics clicked') },
+            { key: 'Reports', iconName: 'lucide:fileText', action: () => console.log('Reports clicked') },
+            { key: 'User Settings', iconName: 'lucide:settings', action: () => console.log('Settings clicked') },
+            { key: 'Help', iconName: 'lucide:helpCircle', action: () => console.log('Help clicked') },
+          ]}
+        >
+          <div style="padding: 24px; color: ${cssManager.bdTheme('#71717a', '#a1a1aa')};">
+            Select a tab to see the smooth sliding animation of the indicator. The indicator automatically adjusts its width to match the tab content with minimal padding.
+          </div>
+        </dees-appui-tabs>
+      </div>
+      
+      <div class="section">
+        <div class="section-title">Vertical Tabs Layout</div>
+        <div class="two-column">
+          <dees-appui-tabs
+            .tabStyle=${'vertical'}
+            .tabs=${[
+              { key: 'Profile', iconName: 'lucide:user', action: () => console.log('Profile clicked') },
+              { key: 'Security', iconName: 'lucide:shield', action: () => console.log('Security clicked') },
+              { key: 'Notifications', iconName: 'lucide:bell', action: () => console.log('Notifications clicked') },
+              { key: 'Integrations', iconName: 'lucide:link', action: () => console.log('Integrations clicked') },
+              { key: 'Advanced', iconName: 'lucide:code', action: () => console.log('Advanced clicked') },
+            ]}
+          ></dees-appui-tabs>
+          <div style="padding: 24px; color: ${cssManager.bdTheme('#71717a', '#a1a1aa')};">
+            Vertical tabs work great for settings pages and navigation menus. The animated indicator smoothly transitions between selections.
+          </div>
+        </div>
+      </div>
+      
+      <div class="section">
+        <div class="section-title">Without Indicator</div>
+        <dees-appui-tabs
+          .showTabIndicator=${false}
+          .tabs=${[
+            { key: 'All', action: () => console.log('All clicked') },
+            { key: 'Active', action: () => console.log('Active clicked') },
+            { key: 'Completed', action: () => console.log('Completed clicked') },
+            { key: 'Archived', action: () => console.log('Archived clicked') },
+          ]}
+        >
+          <div style="padding: 24px; color: ${cssManager.bdTheme('#71717a', '#a1a1aa')};">
+            Tabs can also be used without the animated indicator by setting showTabIndicator to false.
+          </div>
+        </dees-appui-tabs>
+      </div>
+    </div>
   `;
 
   // INSTANCE
@@ -50,148 +129,217 @@ export class DeesAppuiTabs extends DeesElement {
 
       .tabs-wrapper {
         position: relative;
-        background: ${cssManager.bdTheme('#f5f5f5', '#000000')};
-        height: 52px;
+      }
+
+      .tabs-wrapper.horizontal-wrapper {
+        border-bottom: 1px solid ${cssManager.bdTheme('#e5e7eb', '#27272a')};
       }
 
       .tabsContainer {
         position: relative;
-        z-index: 1;
         user-select: none;
       }
 
       .tabsContainer.horizontal {
-        display: grid;
-        padding-top: 20px;
-        padding-bottom: 0px;
-        margin-left: 24px;
+        display: flex;
+        align-items: center;
         font-size: 14px;
+        overflow-x: auto;
+        scrollbar-width: none;
+        height: 48px;
+        padding: 0 16px;
+        gap: 4px;
+      }
+
+      .tabsContainer.horizontal::-webkit-scrollbar {
+        display: none;
       }
 
       .tabsContainer.vertical {
         display: flex;
         flex-direction: column;
-        padding: 20px;
+        padding: 8px;
         font-size: 14px;
+        gap: 2px;
+        position: relative;
+        background: ${cssManager.bdTheme('#f9fafb', '#18181b')};
+        border-radius: 8px;
       }
 
       .tab {
-        color: ${cssManager.bdTheme('#666', '#a0a0a0')};
+        color: ${cssManager.bdTheme('#71717a', '#71717a')};
         white-space: nowrap;
-        cursor: default;
-        transition: color 0.1s;
+        cursor: pointer;
+        transition: color 0.15s ease;
+        font-weight: 500;
+        position: relative;
+        z-index: 2;
       }
 
       .horizontal .tab {
-        margin-right: 30px;
-        padding-top: 4px;
-        padding-bottom: 12px;
+        padding: 0 16px;
+        height: 100%;
+        display: inline-flex;
+        align-items: center;
+        gap: 8px;
+        position: relative;
+        border-radius: 6px 6px 0 0;
+        transition: background-color 0.15s ease;
       }
-
-      .vertical .tab {
-        padding: 12px 16px;
-        margin-bottom: 4px;
-        border-radius: 4px;
-        width: 100%;
-        display: flex;
+      
+      .horizontal .tab:not(:last-child)::after {
+        content: '';
+        position: absolute;
+        right: -2px;
+        top: 50%;
+        transform: translateY(-50%);
+        height: 20px;
+        width: 1px;
+        background: ${cssManager.bdTheme('#e5e7eb', '#27272a')};
+        opacity: 0.5;
+      }
+      
+      .horizontal .tab .tab-content {
+        display: inline-flex;
         align-items: center;
         gap: 8px;
       }
 
+      .vertical .tab {
+        padding: 10px 16px;
+        border-radius: 6px;
+        width: 100%;
+        display: flex;
+        align-items: center;
+        gap: 8px;
+        transition: all 0.15s ease;
+      }
+
       .tab:hover {
-        color: ${cssManager.bdTheme('#000', '#ffffff')};
+        color: ${cssManager.bdTheme('#09090b', '#fafafa')};
+      }
+      
+      .horizontal .tab:hover {
+        background: ${cssManager.bdTheme('rgba(0, 0, 0, 0.03)', 'rgba(255, 255, 255, 0.03)')};
+      }
+      
+      .horizontal .tab:hover::after,
+      .horizontal .tab:hover + .tab::after {
+        opacity: 0;
       }
 
       .vertical .tab:hover {
-        background: ${cssManager.bdTheme('rgba(0, 0, 0, 0.05)', 'rgba(255, 255, 255, 0.05)')};
+        background: ${cssManager.bdTheme('rgba(244, 244, 245, 0.5)', 'rgba(39, 39, 42, 0.5)')};
       }
 
-      .tab.selectedTab {
-        color: ${cssManager.bdTheme('#333', '#e0e0e0')};
+      .horizontal .tab.selectedTab {
+        color: ${cssManager.bdTheme('#09090b', '#fafafa')};
+      }
+      
+      .horizontal .tab.selectedTab::after,
+      .horizontal .tab.selectedTab + .tab::after {
+        opacity: 0;
       }
 
       .vertical .tab.selectedTab {
-        background: ${cssManager.bdTheme('rgba(0, 0, 0, 0.1)', 'rgba(255, 255, 255, 0.1)')};
-        color: ${cssManager.bdTheme('#000', '#ffffff')};
+        color: ${cssManager.bdTheme('#09090b', '#fafafa')};
       }
 
       .tab dees-icon {
         font-size: 16px;
       }
 
-      .tabs-wrapper .tabIndicator {
+      .tabIndicator {
         position: absolute;
-        z-index: 0;
-        left: 40px;
-        bottom: 0px;
-        height: 40px;
-        width: 40px;
-        background: ${cssManager.bdTheme('#ffffff', '#161616')};
-        transition: all 0.1s;
-        border-top-left-radius: 8px;
-        border-top-right-radius: 8px;
-        border-top: 1px solid ${cssManager.bdTheme('#e0e0e0', '#444444')};
+        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+        opacity: 0;
+      }
+      
+      .tabIndicator.no-transition {
+        transition: none;
       }
 
-      .vertical .tabIndicator {
-        display: none;
+      .tabs-wrapper .tabIndicator {
+        height: 3px;
+        bottom: 0;
+        background: ${cssManager.bdTheme('#3b82f6', '#3b82f6')};
+        border-radius: 3px 3px 0 0;
+        z-index: 3;
+      }
+
+      .vertical-wrapper {
+        position: relative;
+      }
+
+      .vertical-wrapper .tabIndicator {
+        left: 8px;
+        right: 8px;
+        border-radius: 6px;
+        background: ${cssManager.bdTheme('#ffffff', '#27272a')};
+        z-index: 1;
+        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
       }
 
       .content {
-        margin-top: 20px;
+        padding: 32px 24px;
       }
     `,
   ];
 
   public render(): TemplateResult {
     return html`
-      ${this.tabStyle === 'horizontal' ? html`
-        <style>
-          .tabsContainer.horizontal {
-            grid-template-columns: repeat(${this.tabs.length}, min-content);
-          }
-        </style>
-        <div class="tabs-wrapper">
-          <div class="tabsContainer horizontal">
-            ${this.tabs.map((tabArg) => {
-              return html`
-                <div
-                  class="tab ${tabArg === this.selectedTab ? 'selectedTab' : ''}"
-                  @click="${() => this.selectTab(tabArg)}"
-                >
-                  ${tabArg.key}
-                </div>
-              `;
-            })}
-          </div>
-          ${this.showTabIndicator ? html`
-            <div class="tabIndicator"></div>
-          ` : ''}
-        </div>
-      ` : html`
-        <div class="tabsContainer vertical">
-          ${this.tabs.map((tabArg) => {
-            return html`
-              <div
-                class="tab ${tabArg === this.selectedTab ? 'selectedTab' : ''}"
-                @click="${() => this.selectTab(tabArg)}"
-              >
-                ${tabArg.iconName ? html`<dees-icon .iconName=${tabArg.iconName}></dees-icon>` : ''}
-                ${tabArg.key}
-              </div>
-            `;
-          })}
-        </div>
-      `}
+      ${this.renderTabsWrapper()}
       <div class="content">
         <slot></slot>
       </div>
     `;
   }
 
+  private renderTabsWrapper(): TemplateResult {
+    const isHorizontal = this.tabStyle === 'horizontal';
+    const wrapperClass = isHorizontal ? 'tabs-wrapper horizontal-wrapper' : 'vertical-wrapper';
+    const containerClass = `tabsContainer ${this.tabStyle}`;
+
+    return html`
+      <div class="${wrapperClass}">
+        <div class="${containerClass}">
+          ${this.tabs.map(tab => this.renderTab(tab, isHorizontal))}
+        </div>
+        ${this.showTabIndicator ? html`<div class="tabIndicator"></div>` : ''}
+      </div>
+    `;
+  }
+
+  private renderTab(tab: interfaces.ITab, isHorizontal: boolean): TemplateResult {
+    const isSelected = tab === this.selectedTab;
+    const classes = `tab ${isSelected ? 'selectedTab' : ''}`;
+    
+    const content = isHorizontal ? html`
+      <span class="tab-content">
+        ${this.renderTabIcon(tab)}
+        ${tab.key}
+      </span>
+    ` : html`
+      ${this.renderTabIcon(tab)}
+      ${tab.key}
+    `;
+
+    return html`
+      <div
+        class="${classes}"
+        @click="${() => this.selectTab(tab)}"
+      >
+        ${content}
+      </div>
+    `;
+  }
+
+  private renderTabIcon(tab: interfaces.ITab): TemplateResult | '' {
+    return tab.iconName ? html`<dees-icon .icon=${tab.iconName}></dees-icon>` : '';
+  }
+
   private selectTab(tabArg: interfaces.ITab) {
     this.selectedTab = tabArg;
-    this.updateTabIndicator();
     tabArg.action();
     
     // Emit tab-select event
@@ -202,31 +350,6 @@ export class DeesAppuiTabs extends DeesElement {
     }));
   }
 
-  /**
-   * updates the indicator position
-   */
-  private updateTabIndicator() {
-    if (!this.showTabIndicator || this.tabStyle !== 'horizontal' || !this.selectedTab) {
-      return;
-    }
-    
-    const tabIndex = this.tabs.indexOf(this.selectedTab);
-    const selectedTabElement: HTMLElement = this.shadowRoot.querySelector(
-      `.tabs-wrapper .tabsContainer .tab:nth-child(${tabIndex + 1})`
-    );
-    
-    if (!selectedTabElement) return;
-    
-    const tabsContainer: HTMLElement = this.shadowRoot.querySelector('.tabs-wrapper .tabsContainer');
-    const marginLeft = parseInt(window.getComputedStyle(tabsContainer).getPropertyValue("margin-left"));
-    const tabIndicator: HTMLElement = this.shadowRoot.querySelector('.tabs-wrapper .tabIndicator');
-    
-    if (tabIndicator) {
-      tabIndicator.style.width = selectedTabElement.clientWidth + 24 + 'px';
-      tabIndicator.style.left = selectedTabElement.offsetLeft + marginLeft - 12 + 'px';
-    }
-  }
-
   firstUpdated() {
     if (this.tabs && this.tabs.length > 0) {
       this.selectTab(this.tabs[0]);
@@ -241,7 +364,83 @@ export class DeesAppuiTabs extends DeesElement {
     }
     
     if (changedProperties.has('selectedTab') || changedProperties.has('tabs')) {
-      this.updateTabIndicator();
+      await this.updateComplete;
+      // Wait for fonts to load on first update
+      if (!this.indicatorInitialized && document.fonts) {
+        await document.fonts.ready;
+      }
+      requestAnimationFrame(() => {
+        this.updateTabIndicator();
+      });
     }
   }
+
+  private indicatorInitialized = false;
+
+  private updateTabIndicator() {
+    if (!this.selectedTab || !this.showTabIndicator) {
+      return;
+    }
+
+    const selectedIndex = this.tabs.indexOf(this.selectedTab);
+    if (selectedIndex === -1) {
+      return;
+    }
+
+    // Select the correct tab element using nth-child
+    const selector = this.tabStyle === 'horizontal' 
+      ? `.tabs-wrapper .tabsContainer .tab:nth-child(${selectedIndex + 1})`
+      : `.vertical-wrapper .tabsContainer .tab:nth-child(${selectedIndex + 1})`;
+      
+    const selectedTabElement = this.shadowRoot.querySelector(selector) as HTMLElement;
+    
+    if (!selectedTabElement) {
+      return;
+    }
+
+    const indicator = this.shadowRoot.querySelector('.tabIndicator') as HTMLElement;
+    if (!indicator) {
+      return;
+    }
+
+    // Disable transition for initial positioning
+    if (!this.indicatorInitialized) {
+      indicator.classList.add('no-transition');
+      this.indicatorInitialized = true;
+      
+      setTimeout(() => {
+        indicator.classList.remove('no-transition');
+      }, 50);
+    }
+
+    if (this.tabStyle === 'horizontal') {
+      const tabContent = selectedTabElement.querySelector('.tab-content') as HTMLElement;
+      
+      if (tabContent) {
+        // Use getBoundingClientRect for accurate positioning
+        const wrapperRect = indicator.parentElement.getBoundingClientRect();
+        const contentRect = tabContent.getBoundingClientRect();
+        
+        // Calculate the position relative to wrapper
+        const contentLeft = contentRect.left - wrapperRect.left;
+        
+        // Set width to match content plus small padding
+        const indicatorWidth = contentRect.width + 8;
+        
+        // Center the indicator on content (shift left by half the extra width)
+        const indicatorLeft = contentLeft - 4;
+        
+        indicator.style.width = `${indicatorWidth}px`;
+        indicator.style.left = `${indicatorLeft}px`;
+      }
+    } else {
+      // For vertical tabs
+      const tabsContainer = this.shadowRoot.querySelector('.vertical-wrapper .tabsContainer') as HTMLElement;
+      
+      indicator.style.top = `${selectedTabElement.offsetTop + tabsContainer.offsetTop}px`;
+      indicator.style.height = `${selectedTabElement.clientHeight}px`;
+    }
+
+    indicator.style.opacity = '1';
+  }
 }