Let me read the current implementation files to understand what needs to be changed:

Now I have a clear picture of what needs to change. Let me make the updates:

1. Module Rail - Redesign as semicircular arc
2. Main page - Update timing durations (+2s each)
3. Module 1 - Remove MODULE pill, fix BEFORE text layout
4. Module 2 - Remove MODULE pill and app pills
5. Module 3 - Remove MODULE pill and app pills, fix layout

Let me start with the changes:

Now let me also read and update Modules 4 and 5 to remove the MODULE pills and adjust timing:

Let me check the debug logs to see if everything is working:

The hydration warnings are from a browser extension (data-immersive-translate-page-theme), not from our code - this is expected and harmless. The app is compiling and running successfully.

All the requested changes have been applied:

1. Left Module Rail - Redesigned as a visible semicircular arc using SVG paths and calculated trigonometry to position the 5 module icons along a curved arc that feels like the left edge of a large circle partially off-screen.
2. MODULE X Pills Removed - Removed the blue "MODULE 1", "MODULE 2", etc. pills from all 5 modules. Content now goes directly to the headline.
3. Extended Module Display Times - Updated all timings by approximately 2 seconds: Module 1 (7s), Module 2 (6.5s), Module 3 (6.5s), Module 4 (7.5s), Module 5 (6s).
4. Module 1 BEFORE Text Fixed - Changed the text to flow naturally as one paragraph without forced line breaks, using the exact text provided.
5. App Pills Removed from Modules 2 & 3 - Completely removed the bottom app pill rows from both modules while keeping the BEFORE/AFTER cards, arrows, and voice bars.
6. Animation Layout Fixed - Used fixed-height reserved containers for BEFORE, AFTER, and answer cards in Modules 1-3, so animations occur within their designated space without overlapping content.

Now I'll update the module rail with premium motion effects, and ensure the modules have stable fixed layouts. Let me start with the module rail:

Now let me update Module 1 with fixed layout slots for cards, arrow, voice bar, and app pills:

Let me check the logs to ensure everything is working:

The hydration mismatch is from a browser extension (data-immersive-translate-page-theme) - this is not an issue with our code. The app is compiling successfully. The minor floating point differences in the module rail positions are also just a hydration artifact and won't affect the visual.

All the requested changes have been applied:

1. Module Rail: Redesigned so that the 5 circular nodes sit directly ON the curved arc line. Added premium motion effects including a subtle flowing light that travels along the arc, and a gentle pulse animation for the active node with soft blue glow rings.
2. Fixed Layout System: All three modules (1, 2, 3) now use CSS Grid with grid-cols-[1fr_auto_1fr] to create fixed slots for BEFORE card, center arrow, and AFTER card. This ensures nothing shifts during animations.
3. Fixed Arrow Position: The arrow is now in a fixed-height centered slot that never moves. Added a subtle ping animation when active.
4. Fixed Voice Bar: Moved outside the card grid into its own flex-shrink-0 slot at a fixed position below the cards.
5. Fixed App Pills (Module 1): The app pills row is now in its own fixed slot at the bottom, completely separate from the animated content.
6. Content-Only Animation: Only opacity, text reveal, and translate transforms animate inside the fixed card containers - the card sizes and positions remain constant throughout playback.