diff --git a/CHANGES 4.md b/CHANGES 4.md
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--- /dev/null
+++ b/CHANGES 4.md	
@@ -0,0 +1,170 @@
+# Site update v5 — hero centered, real pin-scroll, card illustrations, bifrost headline breathing room
+
+Four changes in this round. v4's wheelMultiplier sticky approach is replaced with a proper ScrollTrigger pin implementation because the previous attempts didn't feel sticky enough.
+
+## Files to replace
+
+| File | What changed |
+|---|---|
+| `protected/index.html` | Hero centered vertically (align-items + padding reset); AI + Agents cards get custom mask-image illustrations; Project Bifrost headline padding + looser line-height |
+| `protected/bifrost.js` | wheelMultiplier approach removed; ScrollTrigger pins added on hero, each map stop, and #bifrost-join; map path rebuilds on ScrollTrigger refresh |
+| `protected/timeline.js` | **No change** from v4 — copy only if you want fresh copy alongside |
+
+## New files to upload
+
+| File | Destination on server |
+|---|---|
+| `ai.png` | `/opt/fenja/protected/fenja/illustrations/ai.png` |
+| `agents.png` | `/opt/fenja/protected/fenja/illustrations/agents.png` |
+
+If you're using rsync with `--delete`, ensure the local `protected/fenja/illustrations/` folder contains both PNGs so they end up on the VPS. Otherwise the AI and Agents cards will show blank (the mask-image URL points to 404).
+
+## Change-by-change
+
+### 1. Hero vertically centered
+
+- `#hero` is now `align-items: center` (was `start`) with `padding-top: 0`.
+- `#page-overview #hero .hero-wrap` also has `padding-top: 0` — parent centering now handles vertical position.
+- The whole block (eyebrow + title + lede + hero-foot row) reads as centered on viewport load. No block-level math needed — CSS grid does it.
+
+### 2. Real scroll pinning via GSAP ScrollTrigger
+
+v4's `wheelMultiplier` trick (reducing Lenis wheel input to 0.35× inside a "sticky zone") didn't produce the tactile "scroll a few times to pass" feel you wanted. **Replaced entirely** with proper GSAP ScrollTrigger pins.
+
+**How it works:**
+```js
+ScrollTrigger.create({
+  trigger: el,
+  start: 'center center',
+  end: '+=300',      // 300px of extra scroll distance held
+  pin: true,
+  pinSpacing: true,  // document grows by 300px — user MUST scroll through
+  anticipatePin: 1,
+});
+```
+
+**Pinned targets + their hold distances:**
+
+| Target | Hold | Why |
+|---|---|---|
+| `#hero` | +300px | Gentle hold on entry |
+| `#bifrost-meaning .map-stop--intro` | +260px | Short — it's just an intro card |
+| `#bifrost-meaning .map-stop[data-stop="1"]` (Community) | +360px | Full artifact card — noticeable hold |
+| `#bifrost-meaning .map-stop[data-stop="2"]` (Advisory Council) | +360px | Same |
+| `#bifrost-meaning .map-stop[data-stop="3"]` (Pilot Projects) | +360px | Same |
+| `#bifrost-join` | +260px | CTA gets a moment before footer |
+
+**Deliberately NOT pinned** (they already have their own pin/scrub mechanics — double-pinning would fight):
+- `#stack-scene` (S2 architecture — GSAP scrub pin)
+- `#words-scene` (S3 — position:sticky pin inside tall parent)
+- `#bifrost` (S4 — position:sticky pin on `.bifrost-pin`)
+
+**Why pinSpacing:true matters:**
+`pinSpacing: true` injects a spacer div that grows the document by the pin hold distance. Without it, the pin is visually held but the scroll counter advances normally — no "scroll multiple times" feeling. With it, every pin zone adds real scroll distance, so the user genuinely has to keep scrolling.
+
+**The map path rebuild:**
+`pinSpacing: true` pushes each subsequent map stop further down the document. The winding SVG path that connects the dots is computed from live DOM positions via `buildMapPath()`. To keep the path threading correctly through the shifted dots, `buildMapPath` now re-runs on every `ScrollTrigger.refresh` event. No manual intervention needed.
+
+### 3. Card illustrations — AI + Agents
+
+Two of the four architecture cards now carry bespoke illustrations:
+
+- **The AI** (data-layer="0") → `/fenja/illustrations/ai.png` — the single topographic orb
+- **The Agents** (data-layer="3") → `/fenja/illustrations/agents.png` — central orb with six connected smaller orbs
+
+**How the rendering works:**
+The PNGs are white line-art on black backgrounds. They're applied via CSS `mask-image` on the existing `.card-brain` element. The black background becomes transparent (mask excludes black) and the white lines paint through in the card's `paper` fill color. Because it's a mask, the lines render as a single flat color on every card background — matches the existing design system.
+
+**Per-card overrides** (layers 1 and 2 keep the default brain mask):
+
+```css
+.layer-card[data-layer="0"] .card-brain {
+  mask-image: url('/fenja/illustrations/ai.png');
+  aspect-ratio: 1 / 1;
+  mask-size: contain;
+  mask-position: center;
+}
+.layer-card[data-layer="3"] .card-brain {
+  mask-image: url('/fenja/illustrations/agents.png');
+  aspect-ratio: 1 / 1;
+  mask-size: contain;
+  mask-position: center;
+}
+```
+
+The PNGs **must be deployed** to `/opt/fenja/protected/fenja/illustrations/` or the cards will show blank. See "New files to upload" above.
+
+### 4. Project Bifrost headline — room to breathe
+
+`.bifrost-pin` has `overflow: hidden` (it clips the aurora arc's off-screen portions). Combined with `.bifrost-name`'s tight `line-height: 0.95` and the italic "Bifrost" token's gradient `background-clip: text`, the top and bottom edges of the headline were getting clipped.
+
+**Fixes, both on `.bifrost-name`:**
+- `line-height: 0.95` → `1.12` — room for ascenders and descenders
+- Added `padding: 0.12em 0.08em` — generous vertical buffer absorbed into the headline's own box, so the parent `.bifrost-pin` overflow:hidden doesn't reach into the glyphs
+
+Parent overflow:hidden stays (it's protecting the arc animation). The headline simply carries its own breathing room now.
+
+## Spot-check after deploy
+
+- [ ] Overview → hero text sits vertically centered on viewport load. Visually balanced — not clinging to top or bottom.
+- [ ] Scroll past hero → real resistance. After a bit of wheel input, hero unpins and S2 comes in. NOT a smooth flyby.
+- [ ] Scroll into treasure map. **Each stop visibly holds** as it reaches viewport center. You need several wheel flicks to pass through Community, then Advisory Council, then Pilot Projects.
+- [ ] The winding SVG path still threads through each dot correctly — the path has rebuilt itself to account for the new document height from pin spacing.
+- [ ] AI card shows a single textured orb illustration (white line-art, paper color on the card's color).
+- [ ] Agents card shows the network-of-orbs illustration.
+- [ ] Knowledge and Tools cards still show the default brain illustration.
+- [ ] S4 Bifrost reveal: "Project Bifrost" headline visible top to bottom — no clipping on italic "Bifrost" tall letters.
+
+## Tuning knobs
+
+If the pin holds feel too aggressive:
+
+| Target | In `bifrost.js` (`stickyPinSpecs` array) | Change |
+|---|---|---|
+| Less hero hold | `{ sel: '#hero', hold: 300 }` | → `150` |
+| Less treasure map hold | `hold: 360` on `data-stop` entries | → `200` |
+| Stronger hold | any `hold: N` | → higher N |
+
+If a single pin feels wrong and you want to kill it without breaking others, just delete that entry from `stickyPinSpecs`.
+
+If the pins break the map path threading (it's rebuilt on refresh but if something's off): open DevTools, scroll through, and verify `buildMapPath` is firing via the `ScrollTrigger.addEventListener('refresh', buildMapPath)` hook. The path uses live DOM positions so it should always match.
+
+## Things NOT touched
+
+- `public/entrance.html` / `entrance.js` — unchanged.
+- Any of `src/` (auth, db, sessions) — unchanged.
+- S2 architecture scene (scrub pin intact), S3 words fly-in (sticky pin intact), S4 aurora arc (sticky pin intact).
+- The topography parallax behind Europe map (from v3) — still present, still working.
+- The Welcome dot, 7-section nav, hero-foot restructure — all still in place.
+
+## Deploy steps
+
+```powershell
+# Local — copy the new files in
+Copy-Item -Force site-update-v5\protected\index.html  protected\index.html
+Copy-Item -Force site-update-v5\protected\timeline.js protected\timeline.js
+Copy-Item -Force site-update-v5\protected\bifrost.js  protected\bifrost.js
+
+# Create the illustrations folder if it doesn't exist and copy PNGs
+New-Item -ItemType Directory -Force -Path protected\fenja\illustrations
+Copy-Item -Force site-update-v5\protected\fenja\illustrations\ai.png     protected\fenja\illustrations\
+Copy-Item -Force site-update-v5\protected\fenja\illustrations\agents.png protected\fenja\illustrations\
+
+# Test locally
+npm run dev
+# Verify all four changes work before pushing
+
+# Commit + deploy
+git add protected/
+git commit -m "Hero centered, real ScrollTrigger pins, AI+Agents card illustrations, Bifrost headline breathing room"
+# rsync + VPS steps same as before — rsync picks up the new PNGs automatically
+```
+
+On the VPS after rsync, verify the PNGs landed:
+
+```bash
+ls -la /opt/fenja/protected/fenja/illustrations/
+# Should show: ai.png, agents.png, and the three existing stop illustrations
+```
+
+Then `sudo systemctl restart fenja` and spot-check.
diff --git a/protected/fenja/illustrations/agents.png b/protected/fenja/illustrations/agents.png
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diff --git a/protected/fenja/illustrations/blocs tools.png b/protected/fenja/illustrations/blocs tools.png
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diff --git a/protected/fenja/illustrations/lightbulb - knowledge.png b/protected/fenja/illustrations/lightbulb - knowledge.png
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diff --git a/protected/index.html b/protected/index.html
index d5586cf..91a5948 100644
--- a/protected/index.html
+++ b/protected/index.html
@@ -691,14 +691,19 @@
     display: grid;
     align-items: center;
     position: relative;
+    /* Asymmetric block padding — the larger padding-bottom shifts the
+       centered hero content upward, leaving breathing room between the
+       hero-foot row and the dot-nav at the bottom of the viewport. */
+    padding-top: clamp(1.5rem, 3vh, 2.5rem);
+    padding-bottom: clamp(6rem, 16vh, 11rem);
   }
   #page-overview #hero .hero-wrap {
     /* Constrain to the left column so Europe is visible to its right. */
     max-width: 62ch;
-    /* Reduced from clamp(6rem, 16vh, 12rem) to move hero text up into
-       the upper half of the viewport. Same intent as the #hero padding
-       reduction above — the more-specific selector takes precedence. */
-    padding-top: clamp(3rem, 8vh, 6rem);
+    /* Zeroed: wrap padding-top was adding down-drift inside the centered
+       container, pushing the hero-foot toward the dot-nav. Vertical
+       position is now controlled entirely by #hero's asymmetric padding. */
+    padding-top: 0;
   }
 
   /* Make sure scenes don't accidentally inherit `main { position: relative }` */
@@ -1032,32 +1037,32 @@ html {
     will-change: opacity;
   }
 
-  /* Brain icon — CSS mask filled with cream color; looks good on any card tint */
+  /* Card illustration — per-layer PNG set via --card-illust custom property. */
   .card-brain {
     width: 100%;
     aspect-ratio: 20 / 17;
-    background-color: var(--paper);
-    -webkit-mask-image: var(--brain-mask);
-            mask-image: var(--brain-mask);
-    -webkit-mask-size: contain;
-            mask-size: contain;
-    -webkit-mask-position: center right;
-            mask-position: center right;
-    -webkit-mask-repeat: no-repeat;
-            mask-repeat: no-repeat;
-    opacity: 0.9;
+    background-image: var(--card-illust);
+    background-size: contain;
+    background-position: center right;
+    background-repeat: no-repeat;
+    opacity: 0.95;
     margin-right: clamp(-3.5rem, -3vw, -1.5rem); /* bleed off right edge */
     pointer-events: none;
     will-change: transform;
   }
 
-  /* Per-layer colours — muted Nordic mid-tones.
-     Dark ink text + cream brain both read well on each. */
+  /* Per-layer colours — muted Nordic mid-tones. */
   .layer-card[data-layer="0"] .card-box { background: #7a8c70; } /* sage — AI Model */
   .layer-card[data-layer="1"] .card-box { background: #7b9399; } /* slate — Knowledge */
   .layer-card[data-layer="2"] .card-box { background: #b07556; } /* clay — Tools */
   .layer-card[data-layer="3"] .card-box { background: #8a7a92; } /* plum — Agents */
 
+  /* Per-layer illustrations — URL-encode spaces in filenames. */
+  .layer-card[data-layer="0"] .card-brain { --card-illust: url('/fenja/illustrations/ai.png'); }
+  .layer-card[data-layer="1"] .card-brain { --card-illust: url('/fenja/illustrations/lightbulb%20-%20knowledge.png'); }
+  .layer-card[data-layer="2"] .card-brain { --card-illust: url('/fenja/illustrations/blocs%20tools.png'); }
+  .layer-card[data-layer="3"] .card-brain { --card-illust: url('/fenja/illustrations/agents.png'); }
+
   /* z-stacking — later layers appear on top */
   .layer-card[data-layer="0"] { z-index: 1; }
   .layer-card[data-layer="1"] { z-index: 2; }
@@ -1124,17 +1129,15 @@ html {
   /* Hide long title + body in grid phase */
   .in-grid .card-content { display: none; }
 
-  /* Brain fills remaining space, centered. */
+  /* Illustration fills remaining space, centered. */
   .in-grid .card-brain {
     margin: 0;
     flex: 1 1 auto;
     width: 100%;
     aspect-ratio: auto;
-    -webkit-mask-position: center;
-            mask-position: center;
-    -webkit-mask-size: 90% auto;
-            mask-size: 90% auto;
-    opacity: 0.85;
+    background-position: center;
+    background-size: 90% auto;
+    opacity: 0.9;
   }
 
   /* Hide the outside-box eyebrow during grid phase */