diff --git a/site/templates/portfolio.json.php b/site/templates/portfolio.json.php
index 7838aca..6d0e249 100644
--- a/site/templates/portfolio.json.php
+++ b/site/templates/portfolio.json.php
@@ -1,27 +1,23 @@
 <?php
 
 $specificData = [
-  'intro' => [
-    'title' => $page->intro_title()->value(),
-    'text' => $page->intro_text()->value()
-  ],
   'projects' => $page->children()->listed()->map(function($project) {
     return [
-      'title' => $project->title()->value(),
-      'slug' => $project->slug(),
-      'url' => $project->url(),
-      'tagline' => $project->tagline()->value(),
-      'description' => $project->description()->value(),
-      'cover' => $project->cover()->toFile()?->url(),
-      'cover_thumb' => $project->cover()->toFile()?->thumb(['width' => 100])->url(),
-      'gallery' => $project->files()->filterBy('template', 'image')->limit(5)->map(function($img) {
-        return $img->url();
-      })->values(),
-      'impact' => $project->impact()->split(','),
-      'category' => $project->category()->value(),
-      'platforms' => $project->platforms()->split(','),
-      'apple_link' => $project->apple_link()->value(),
-      'android_link' => $project->android_link()->value()
+      'title'          => $project->title()->value(),
+      'slug'           => $project->slug(),
+      'catchphrase'    => $project->catchphrase()->value(),
+      'description'    => $project->description()->value(),
+      'thumbnail'      => $project->thumbnail()->toFile()?->url(),
+      'images_gallery' => $project->images_gallery()->toFiles()->map(fn($f) => $f->url())->values(),
+      'mockup'         => $project->mockup()->toFile()?->url(),
+      'keywords'       => $project->keywords()->toStructure()->map(fn($i) => [
+                            'label' => $i->label()->value(),
+                            'text'  => $i->text()->value(),
+                          ])->values(),
+      'external_links' => $project->external_links()->toStructure()->map(fn($i) => [
+                            'label' => $i->label()->value(),
+                            'url'   => $i->url()->value(),
+                          ])->values(),
     ];
   })->values()
 ];
diff --git a/src/components/ui/GalleryAnimation.svelte b/src/components/ui/GalleryAnimation.svelte
new file mode 100644
index 0000000..1d237b2
--- /dev/null
+++ b/src/components/ui/GalleryAnimation.svelte
@@ -0,0 +1,50 @@
+<script>
+  /**
+   * GalleryAnimation — animation CSS de galerie en 3 colonnes défilantes.
+   * @prop {string[]} images         — URLs des images
+   * @prop {number}  secondsPerImage — durée par image (défaut: 8s)
+   */
+  let { images = [], secondsPerImage = 8 } = $props()
+
+  const columns = $derived.by(() => {
+    const count    = images.length
+    const duration = count * secondsPerImage
+    const defs = [
+      { offset: 0,                    delay: 0 },
+      { offset: Math.floor(count / 3), delay: duration / 4 },
+      { offset: 0,                    delay: duration / 2 },
+    ]
+    return defs.map(({ offset, delay }) => ({
+      images: shiftImages(images, offset),
+      delay,
+      duration,
+    }))
+  })
+
+  function shiftImages(imgs, offset) {
+    if (!offset) return imgs
+    return [...imgs.slice(offset), ...imgs.slice(0, offset)]
+  }
+</script>
+
+<div
+  class="gallery-animation gallery-animation--vertical"
+  style="--gallery-duration: {columns[0]?.duration ?? 24}s"
+>
+  {#each columns as col}
+    <div class="gallery-animation__column">
+      <div
+        class="gallery-animation__track"
+        style="animation-delay: -{col.delay}s"
+      >
+        <!-- Images × 2 pour le défilement infini -->
+        {#each col.images as src}
+          <img class="gallery-animation__image" {src} alt="" aria-hidden="true" loading="lazy" />
+        {/each}
+        {#each col.images as src}
+          <img class="gallery-animation__image" {src} alt="" aria-hidden="true" loading="lazy" />
+        {/each}
+      </div>
+    </div>
+  {/each}
+</div>
diff --git a/src/composables/useScrollNav.svelte.js b/src/composables/useScrollNav.svelte.js
new file mode 100644
index 0000000..7257eee
--- /dev/null
+++ b/src/composables/useScrollNav.svelte.js
@@ -0,0 +1,88 @@
+/**
+ * createScrollNav — composable partagé scroll/touch/clavier pour Expertise et Portfolio.
+ *
+ * @param {object} options
+ * @param {() => boolean} options.isActive       — getter réactif : la slide est-elle active ?
+ * @param {(dir: 'up'|'down') => false|void} options.onNavigate — appelé pour naviguer ;
+ *                                                  retourner `false` si on est à la limite
+ * @param {object} [options.config]
+ * @param {number} [options.config.scrollLockMs=650]
+ * @param {number} [options.config.wheelDebounceMs=100]
+ * @param {number} [options.config.wheelThreshold=25]
+ * @param {number} [options.config.touchThreshold=50]
+ */
+export function createScrollNav({ isActive, onNavigate, config = {} }) {
+  const {
+    scrollLockMs    = 650,
+    wheelDebounceMs = 100,
+    wheelThreshold  = 25,
+    touchThreshold  = 50,
+  } = config
+
+  let canScroll  = $state(true)
+  let lockTimer  = null
+  let scrollDelta  = 0
+  let lastScrollAt = 0
+  let touchStartY  = 0
+
+  function lock() {
+    canScroll = false
+    clearTimeout(lockTimer)
+    lockTimer = setTimeout(() => { canScroll = true }, scrollLockMs)
+  }
+
+  function tryNavigate(dir) {
+    const result = onNavigate(dir)
+    if (result !== false) lock()
+  }
+
+  function onWheel(e) {
+    e.preventDefault()
+    if (!isActive() || !canScroll) return
+    const now = Date.now()
+    if (now - lastScrollAt > wheelDebounceMs) scrollDelta = 0
+    lastScrollAt = now
+    scrollDelta += e.deltaY
+    if (Math.abs(scrollDelta) >= wheelThreshold) {
+      tryNavigate(scrollDelta > 0 ? 'down' : 'up')
+      scrollDelta = 0
+    }
+  }
+
+  function onTouchStart(e) {
+    touchStartY = e.touches[0].clientY
+  }
+
+  function onTouchEnd(e) {
+    if (!isActive() || !canScroll) return
+    const diff = touchStartY - e.changedTouches[0].clientY
+    if (Math.abs(diff) >= touchThreshold) tryNavigate(diff > 0 ? 'down' : 'up')
+  }
+
+  function onKeyDown(e) {
+    if (!isActive() || !canScroll) return
+    if (e.key === 'ArrowDown') { e.preventDefault(); tryNavigate('down') }
+    if (e.key === 'ArrowUp')   { e.preventDefault(); tryNavigate('up') }
+  }
+
+  function reset() {
+    canScroll = true
+    clearTimeout(lockTimer)
+    lockTimer = null
+    scrollDelta = 0
+  }
+
+  function destroy() {
+    clearTimeout(lockTimer)
+  }
+
+  return {
+    get canScroll() { return canScroll },
+    onWheel,
+    onTouchStart,
+    onTouchEnd,
+    onKeyDown,
+    reset,
+    destroy,
+  }
+}
diff --git a/src/styles/gallery.css b/src/styles/gallery.css
new file mode 100644
index 0000000..cef463b
--- /dev/null
+++ b/src/styles/gallery.css
@@ -0,0 +1,65 @@
+/* Gallery animation */
+:root {
+  --gallery-gap:      8px;
+  --gallery-duration: 24s;
+}
+
+.gallery-animation {
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+}
+
+/* Vertical mode (Portfolio) */
+.gallery-animation--vertical {
+  display: flex;
+  flex-direction: row;
+  gap: var(--gallery-gap);
+}
+
+.gallery-animation--vertical .gallery-animation__column {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+
+.gallery-animation--vertical .gallery-animation__track {
+  display: flex;
+  flex-direction: column;
+  animation-timing-function: linear;
+  animation-iteration-count: infinite;
+}
+
+.gallery-animation--vertical .gallery-animation__column:nth-child(odd) .gallery-animation__track {
+  animation-name: galleryScrollDown;
+  animation-duration: var(--gallery-duration);
+}
+
+.gallery-animation--vertical .gallery-animation__column:nth-child(even) .gallery-animation__track {
+  animation-name: galleryScrollUp;
+  animation-duration: var(--gallery-duration);
+}
+
+.gallery-animation__image {
+  width: 100%;
+  height: auto;
+  display: block;
+  object-fit: contain;
+}
+
+@keyframes galleryScrollDown {
+  from { transform: translateY(0); }
+  to   { transform: translateY(-50%); }
+}
+
+@keyframes galleryScrollUp {
+  from { transform: translateY(-50%); }
+  to   { transform: translateY(0); }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .gallery-animation__track {
+    animation: none;
+  }
+}
diff --git a/src/styles/index.css b/src/styles/index.css
index d437c36..c02597e 100644
--- a/src/styles/index.css
+++ b/src/styles/index.css
@@ -6,3 +6,4 @@
 @import './buttons.css';
 @import './cursor.css';
 @import './utils.css';
+@import './gallery.css';
diff --git a/src/styles/variables.css b/src/styles/variables.css
index c7ec9fd..3402246 100644
--- a/src/styles/variables.css
+++ b/src/styles/variables.css
@@ -56,6 +56,9 @@
   --font-size-button-tablet: 12px;
   --font-size-caption-tablet: 11px;
 
+  /* Easing */
+  --ease-standard: cubic-bezier(0.65, 0, 0.35, 1);
+
   /* Font sizes — expertise items */
   --font-size-expertise: 22px;
   --font-size-expertise-mobile: 18px;
diff --git a/src/views/Expertise.svelte b/src/views/Expertise.svelte
index d5108c1..8287746 100644
--- a/src/views/Expertise.svelte
+++ b/src/views/Expertise.svelte
@@ -1,20 +1,16 @@
 <script>
   import { onMount } from 'svelte'
   import { slides } from '@state/slides.svelte'
+  import { createScrollNav } from '@composables/useScrollNav.svelte.js'
 
   let { data } = $props()
 
   // --- Constants ---
-  const SCROLL_LOCK_MS    = 650   // ms before next scroll is accepted
-  const WHEEL_DEBOUNCE_MS = 100   // ms window to accumulate wheel delta
-  const WHEEL_THRESHOLD   = 25    // accumulated px to trigger navigation
-  const TOUCH_THRESHOLD   = 50    // px swipe distance to trigger navigation
-  const PLAY_DELAY_MS     = 300   // ms delay before starting playback on slide activation
-  const REV_TARGET_MIN    = 0.1   // min revTarget to avoid pausing exactly at videoDuration
+  const PLAY_DELAY_MS  = 300   // ms delay before starting playback on slide activation
+  const REV_TARGET_MIN = 0.1   // min revTarget to avoid pausing exactly at videoDuration
 
   // --- State ---
   let currentItem   = $state(0)
-  let canScroll     = $state(true)
   let isReverse     = $state(false)
   let offsetY       = $state(0)
   let videoDuration = $state(0)
@@ -27,11 +23,8 @@
   let sectionEl     = $state(null)
 
   // --- Plain variables (not reactive, used in event listeners) ---
-  let fwdTarget      = null   // forward video pause target (seconds)
-  let revTarget      = null   // reverse video pause target (seconds)
-  // Position in the forward video timeline.
-  // Updated from videoFwd.currentTime when going forward,
-  // and mirrored from videoRev.currentTime when going in reverse.
+  let fwdTarget      = null
+  let revTarget      = null
   let currentFwdTime = 0
 
   // --- Derived ---
@@ -39,16 +32,27 @@
   const items     = $derived(data?.items ?? [])
   const itemCount = $derived(items.length)
 
-  // segmentEnds[i] = timestamp where forward video pauses after reaching item i
   const segmentEnds = $derived(
     itemCount > 0 && videoDuration > 0
       ? Array.from({ length: itemCount }, (_, i) => videoDuration * (i + 1) / itemCount)
       : []
   )
 
+  // --- Scroll nav composable ---
+  const nav = createScrollNav({
+    isActive: () => isActive,
+    onNavigate: (dir) => {
+      if (segmentEnds.length === 0) return false
+      const prevItem = currentItem
+      const newItem  = dir === 'down'
+        ? Math.min(prevItem + 1, itemCount - 1)
+        : Math.max(prevItem - 1, 0)
+      if (newItem === prevItem) return false
+      navigate(dir, newItem)
+    },
+  })
+
   // --- Center active item vertically in viewport ---
-  // Uses offsetTop which is NOT affected by CSS transforms
-  // Requires position:relative on .expertise-text (see CSS below)
   function computeOffset() {
     if (!textContainer || !itemEls[currentItem]) return
     const wh          = window.innerHeight
@@ -58,8 +62,6 @@
   }
 
   // --- Video control helpers ---
-
-  // Capture current position from whichever video is playing, then stop both.
   function stopActiveVideo() {
     if (videoFwd && !videoFwd.paused) {
       currentFwdTime = videoFwd.currentTime
@@ -73,8 +75,6 @@
     }
   }
 
-  // Seek videoFwd to currentFwdTime and play until targetTime.
-  // If currently showing the reverse video, wait for the seek before switching.
   function playForward(targetTime) {
     fwdTarget = targetTime
     if (videoFwd) videoFwd.currentTime = currentFwdTime
@@ -88,8 +88,6 @@
     }
   }
 
-  // Seek videoRev to the mirror of currentFwdTime and play until targetTime.
-  // If currently showing the forward video, wait for the seek before switching.
   function playReverse(targetTime) {
     const revStart = Math.max(0, videoDuration - currentFwdTime)
     revTarget = targetTime
@@ -104,37 +102,19 @@
     }
   }
 
-  // --- Navigate: move one item up or down ---
-  let scrollLockTimer = null   // internal state for navigate()
-  function navigate(direction) {
-    if (!canScroll || segmentEnds.length === 0) return
-
-    const prevItem = currentItem
-    const newItem  = direction === 'down'
-      ? Math.min(prevItem + 1, itemCount - 1)
-      : Math.max(prevItem - 1, 0)
-
-    if (newItem === prevItem) return   // at boundary, ignore
-
-    canScroll = false
-    clearTimeout(scrollLockTimer)
-    scrollLockTimer = setTimeout(() => { canScroll = true }, SCROLL_LOCK_MS)
-    currentItem = newItem
+  // --- Navigate: move one item up or down (called by composable) ---
+  function navigate(direction, newItem) {
+    const prevItem  = currentItem
+    currentItem     = newItem
 
     if (direction === 'down' && videoFwd && !videoFwd.paused) {
-      // Fast path: forward video already playing — just move the stop point
       fwdTarget = segmentEnds[currentItem]
-
     } else if (direction === 'up' && videoRev && !videoRev.paused) {
-      // Fast path: reverse video already playing — just move the stop point.
-      // Read live currentTime because currentFwdTime is stale during play.
       const liveFwdPos  = videoDuration - videoRev.currentTime
       const segBoundary = segmentEnds[currentItem]
       const targetFwd   = liveFwdPos > segBoundary ? segBoundary : 0
       revTarget = videoDuration - Math.max(targetFwd, REV_TARGET_MIN)
-
     } else {
-      // General case: stop whatever is playing, then start in the right direction
       stopActiveVideo()
       if (direction === 'down') {
         playForward(segmentEnds[currentItem])
@@ -148,38 +128,6 @@
     requestAnimationFrame(() => { if (isActive) computeOffset() })
   }
 
-  // --- Wheel capture (non-passive, attached in onMount) ---
-  let scrollDelta  = 0   // internal state for onWheel()
-  let lastScrollAt = 0
-  function onWheel(e) {
-    e.preventDefault()
-    if (!isActive || !canScroll) return
-    const now = Date.now()
-    if (now - lastScrollAt > WHEEL_DEBOUNCE_MS) scrollDelta = 0
-    lastScrollAt = now
-    scrollDelta += e.deltaY
-    if (Math.abs(scrollDelta) >= WHEEL_THRESHOLD) {
-      navigate(scrollDelta > 0 ? 'down' : 'up')
-      scrollDelta = 0
-    }
-  }
-
-  // --- Touch ---
-  let touchStartY = 0   // internal state for touch handlers
-  function onTouchStart(e) { touchStartY = e.touches[0].clientY }
-  function onTouchEnd(e) {
-    if (!isActive || !canScroll) return
-    const diff = touchStartY - e.changedTouches[0].clientY
-    if (Math.abs(diff) >= TOUCH_THRESHOLD) navigate(diff > 0 ? 'down' : 'up')
-  }
-
-  // --- Keyboard ---
-  function onKeyDown(e) {
-    if (!isActive || !canScroll) return
-    if (e.key === 'ArrowDown') { e.preventDefault(); navigate('down') }
-    if (e.key === 'ArrowUp')   { e.preventDefault(); navigate('up') }
-  }
-
   // --- Playback lifecycle ---
   function initPlayback() {
     setTimeout(() => {
@@ -190,9 +138,8 @@
         videoFwd.currentTime = 0
         currentFwdTime       = 0
         isReverse            = false
-        fwdTarget            = dur / itemCount   // = segmentEnds[0]
+        fwdTarget            = dur / itemCount
         videoFwd.play().catch(() => {})
-        // Pre-seek reverse video to buffer the region needed for the first UP scroll
         if (videoRev) videoRev.currentTime = Math.max(0, dur - dur / itemCount)
         requestAnimationFrame(() => computeOffset())
       }
@@ -216,15 +163,13 @@
     currentItem = 0
     offsetY     = 0
     isReverse   = false
-    canScroll   = true
-    clearTimeout(scrollLockTimer)
+    nav.reset()
   }
 
-  // --- onMount: set up video listeners + wheel + resize ---
+  // --- onMount ---
   onMount(() => {
-    sectionEl?.addEventListener('wheel', onWheel, { passive: false })
+    sectionEl?.addEventListener('wheel', nav.onWheel, { passive: false })
 
-    // Forward video: update currentFwdTime and pause when target is reached
     const onFwdUpdate = () => {
       if (!videoFwd || videoFwd.paused || fwdTarget === null) return
       if (videoFwd.currentTime >= fwdTarget) {
@@ -235,7 +180,6 @@
     }
     videoFwd?.addEventListener('timeupdate', onFwdUpdate)
 
-    // Reverse video: update currentFwdTime (mirrored) and pause when target is reached
     const onRevUpdate = () => {
       if (!videoRev || videoRev.paused || revTarget === null) return
       if (videoRev.currentTime >= revTarget) {
@@ -249,16 +193,16 @@
     const onResize = () => { if (isActive) computeOffset() }
     window.addEventListener('resize', onResize)
     window.addEventListener('orientationchange', onResize)
-    window.addEventListener('keydown', onKeyDown)
+    window.addEventListener('keydown', nav.onKeyDown)
 
     return () => {
-      sectionEl?.removeEventListener('wheel', onWheel)
+      sectionEl?.removeEventListener('wheel', nav.onWheel)
       videoFwd?.removeEventListener('timeupdate', onFwdUpdate)
       videoRev?.removeEventListener('timeupdate', onRevUpdate)
       window.removeEventListener('resize', onResize)
       window.removeEventListener('orientationchange', onResize)
-      window.removeEventListener('keydown', onKeyDown)
-      clearTimeout(scrollLockTimer)
+      window.removeEventListener('keydown', nav.onKeyDown)
+      nav.destroy()
     }
   })
 
@@ -276,8 +220,8 @@
   class="expertise golden-grid slide"
   aria-label="Expertise"
   bind:this={sectionEl}
-  ontouchstart={onTouchStart}
-  ontouchend={onTouchEnd}
+  ontouchstart={nav.onTouchStart}
+  ontouchend={nav.onTouchEnd}
 >
   <!-- Video background (decorative) -->
   <div class="expertise-bg" aria-hidden="true">
@@ -390,15 +334,14 @@
     align-items: flex-start;
   }
 
-  /* Sliding container — position:relative so el.offsetTop is relative to this element
-     (CSS transforms do NOT affect offsetTop, so computeOffset() is always accurate) */
+  /* Sliding container */
   .expertise-text {
     position: relative;
     width: 100%;
   }
 
   .expertise-text, .expertise-item {
-    transition: all 0.6s cubic-bezier(0.65, 0, 0.35, 1);
+    transition: all 0.6s var(--ease-standard);
   }
 
   /* Individual text items */
diff --git a/src/views/Portfolio.svelte b/src/views/Portfolio.svelte
index edfacd4..a23a142 100644
--- a/src/views/Portfolio.svelte
+++ b/src/views/Portfolio.svelte
@@ -1,24 +1,257 @@
 <script>
-  import { fade } from 'svelte/transition'
+  import { onMount } from 'svelte'
+  import { slides } from '@state/slides.svelte'
+  import { createScrollNav } from '@composables/useScrollNav.svelte.js'
+  import GalleryAnimation from '@components/ui/GalleryAnimation.svelte'
+
   let { data } = $props()
+
+  // --- State ---
+  let currentIndex = $state(0)
+  let sectionEl    = $state(null)
+
+  // --- Derived ---
+  const isActive      = $derived(slides.active?.id === 'portfolio')
+  const projects      = $derived(data?.projects ?? [])
+  const currentProject = $derived(projects[currentIndex] ?? null)
+
+  // --- Scroll nav composable ---
+  const nav = createScrollNav({
+    isActive: () => isActive,
+    onNavigate: (dir) => {
+      const next = dir === 'down'
+        ? Math.min(currentIndex + 1, projects.length - 1)
+        : Math.max(currentIndex - 1, 0)
+      if (next === currentIndex) return false
+      currentIndex = next
+    },
+  })
+
+  // --- onMount ---
+  onMount(() => {
+    sectionEl?.addEventListener('wheel', nav.onWheel, { passive: false })
+    window.addEventListener('keydown', nav.onKeyDown)
+
+    return () => {
+      sectionEl?.removeEventListener('wheel', nav.onWheel)
+      window.removeEventListener('keydown', nav.onKeyDown)
+      nav.destroy()
+    }
+  })
+
+  // --- Effect: reset when slide deactivated ---
+  $effect(() => {
+    if (!isActive) {
+      nav.reset()
+      currentIndex = 0
+    }
+  })
 </script>
 
-<div class="portfolio" transition:fade>
-  <div class="portfolio__container">
-    <h1>{data?.title || 'Portfolio'}</h1>
-    <p>Portfolio view - To be implemented</p>
-  </div>
-</div>
+<section
+  class="portfolio golden-grid slide"
+  bind:this={sectionEl}
+  ontouchstart={nav.onTouchStart}
+  ontouchend={nav.onTouchEnd}
+  aria-label="Portfolio"
+>
+  <!-- Decorative vertical lines -->
+  <div class="vertical-line-start"               aria-hidden="true"></div>
+  <div class="vertical-line vertical-line-col8"  aria-hidden="true"></div>
+  <div class="vertical-line-center"              aria-hidden="true"></div>
+  <div class="vertical-line vertical-line-col14" aria-hidden="true"></div>
+  <div class="vertical-line-end"                 aria-hidden="true"></div>
+
+  {#if currentProject}
+    <!-- Galerie animation (gauche) -->
+    <div class="portfolio-gallery" aria-hidden="true">
+      <GalleryAnimation images={currentProject.images_gallery} />
+    </div>
+
+    <!-- Mockup device (centre) -->
+    <div class="portfolio-mockup">
+      <img src={currentProject.mockup} alt={currentProject.title} />
+    </div>
+
+    <!-- Infos projet (droite) -->
+    <div class="portfolio-text" aria-live="polite">
+      <h2>{currentProject.title}</h2>
+      <h3 class="portfolio-catchphrase">{@html currentProject.catchphrase}</h3>
+      <div class="portfolio-description">{@html currentProject.description}</div>
+      <div class="portfolio-keywords">
+        {#each currentProject.keywords as kw}
+          <p><strong>{kw.label} :</strong> {kw.text}</p>
+        {/each}
+      </div>
+      <div class="portfolio-links">
+        {#each currentProject.external_links as link}
+          <a href={link.url} target="_blank" rel="noopener noreferrer" class="button">{link.label}</a>
+        {/each}
+      </div>
+    </div>
+  {/if}
+
+  <!-- Sidebar navigation (extrême droite) -->
+  <nav class="portfolio-nav" aria-label="Projets">
+    {#each projects as project, i}
+      <button
+        class="portfolio-nav-item"
+        class:active={i === currentIndex}
+        onclick={() => { currentIndex = i }}
+      >
+        <span class="portfolio-nav-number">{String(i + 1).padStart(2, '0')}</span>
+        <img src={project.thumbnail} alt={project.title} />
+      </button>
+    {/each}
+  </nav>
+</section>
 
 <style>
   .portfolio {
-    min-height: 100vh;
-    padding: 8rem 2rem 4rem;
-    color: #fff;
+    background: #000;
   }
 
-  .portfolio__container {
-    max-width: 1200px;
-    margin: 0 auto;
+  /* Custom vertical lines */
+  .vertical-line-col8 {
+    grid-area: 1/8 / span 20 / span 1;
+  }
+
+  .vertical-line-col14 {
+    grid-area: 1/14 / span 20 / span 1;
+  }
+
+  /* Desktop layout */
+  .portfolio-gallery {
+    grid-area: 1/1 / span 20 / span 7;
+    overflow: hidden;
+  }
+
+  .portfolio-mockup {
+    grid-area: 6/7 / span 10 / span 4;
+    z-index: var(--z-content);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+  }
+
+  .portfolio-mockup img {
+    width: 100%;
+    height: 100%;
+    object-fit: contain;
+  }
+
+  .portfolio-text {
+    grid-area: 7/11 / span 6 / span 6;
+    z-index: var(--z-content);
+    text-align: left;
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    gap: 0.75rem;
+    color: var(--color-text);
+  }
+
+  .portfolio-text h2 {
+    font-size: var(--font-size-title-section);
+    line-height: 1.1;
+  }
+
+  .portfolio-catchphrase {
+    font-size: var(--font-size-subtitle);
+    color: var(--color-primary);
+    font-weight: normal;
+  }
+
+  .portfolio-description {
+    font-size: var(--font-size-paragraph-small);
+    line-height: 1.5;
+    opacity: 0.8;
+  }
+
+  .portfolio-keywords {
+    font-size: var(--font-size-caption);
+    opacity: 0.6;
+  }
+
+  .portfolio-keywords p {
+    margin: 0;
+  }
+
+  .portfolio-links {
+    display: flex;
+    gap: 0.75rem;
+    flex-wrap: wrap;
+  }
+
+  /* Sidebar navigation */
+  .portfolio-nav {
+    grid-area: 4/17 / span 14 / span 4;
+    z-index: var(--z-content);
+    display: flex;
+    flex-direction: column;
+    align-items: flex-end;
+    justify-content: center;
+    gap: 1rem;
+  }
+
+  .portfolio-nav-item {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    background: none;
+    border: none;
+    cursor: pointer;
+    transform: scale(0.85);
+    opacity: 0.5;
+    transition: transform 0.6s var(--ease-standard), opacity 0.6s var(--ease-standard);
+  }
+
+  .portfolio-nav-item.active {
+    transform: scale(1.25);
+    opacity: 1;
+  }
+
+  .portfolio-nav-number {
+    color: var(--color-text);
+    font-size: var(--font-size-caption);
+  }
+
+  .portfolio-nav-item img {
+    width: 48px;
+    height: 48px;
+    object-fit: cover;
+    border-radius: 8px;
+  }
+
+  /* Mobile (≤ 700px) */
+  @media screen and (max-width: 700px) {
+    .portfolio-gallery {
+      grid-area: 1/1 / span 20 / span 20;
+      opacity: 0.3;
+    }
+
+    .portfolio-mockup {
+      grid-area: 3/4 / span 8 / span 14;
+      z-index: var(--z-content);
+    }
+
+    .portfolio-text {
+      grid-area: 9/3 / span 6 / span 16;
+      z-index: var(--z-content);
+      text-align: center;
+    }
+
+    .portfolio-nav {
+      grid-area: 17/4 / span 2 / span 14;
+      flex-direction: row;
+      justify-content: center;
+    }
+  }
+
+  /* Reduced motion */
+  @media (prefers-reduced-motion: reduce) {
+    .portfolio-nav-item {
+      transition: none;
+    }
   }
 </style>
diff --git a/vite.config.js b/vite.config.js
index cdf1ec2..87b6cc7 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -14,7 +14,8 @@ export default defineConfig({
       '@views': path.resolve(__dirname, 'src/views'),
       '@state': path.resolve(__dirname, 'src/state'),
       '@router': path.resolve(__dirname, 'src/router'),
-      '@utils': path.resolve(__dirname, 'src/utils')
+      '@utils': path.resolve(__dirname, 'src/utils'),
+      '@composables': path.resolve(__dirname, 'src/composables')
     }
   },
   server: {