fix(docs): stop the pinned sidebar running under the site footer

[waleedlatif1]

Summary

• The docs sidebar and its divider are fixed to the viewport, so at the end of the page the footer was drawn over them and the bottom of the nav list became unreachable
• FooterOverlapProbe publishes how far the footer reaches into the viewport as --docs-footer-overlap; the sidebar reads it as bottom and slides up out of view as the footer arrives, keeping the full list readable
• The divider reads the same value but is shortened rather than slid, so it terminates on the footer's top border instead of stopping short
• Measured against the viewport rather than the document on purpose — the value is a constant 0 while the footer is off screen, so a content-height change higher up the page cannot move the sidebar (the regression fix(docs): stop the sidebar drifting when page content resizes #6301 fixed)

Type of Change

• Bug fix

Testing

Tested manually, plus Playwright measurements at 1280x800 and 2000x1100:

• Expanding/collapsing an FAQ with the footer off screen moves the sidebar 0px / 0px, content column left unchanged
• At the page bottom the sidebar's bottom edge lands within ~1px of the footer's top (the footer's z-[22] covers the rounding sliver)
• Divider spans top: 92px to the footer's top border at both sizes
• Below lg is untouched — the rule is inside the existing desktop-only media query

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

[vercel]

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview	Aug 8, 2026 7:06pm

[cursor]

PR Summary

Low Risk
Scoped to docs desktop CSS and a small footer measurement hook; no auth, data, or API changes. Main risk is layout regressions on docs pages near the footer or on FAQ expand/collapse.

Overview
Fixes the desktop docs layout where the fixed sidebar and vertical divider drew through the site footer, leaving bottom nav items unreachable.

A new FooterOverlapProbe in the footer measures how far the footer intrudes into the viewport and sets --docs-footer-overlap on the document root (viewport-based, so overlap stays 0 while the footer is off-screen—preserving the #6301 fix against sidebar jumps when content height changes higher on the page).

global.css (desktop lg+ only): the sidebar placeholder uses bottom: var(--docs-footer-overlap) with top: auto so the nav slides up as the footer enters; the #nd-docs-layout::before divider switches from a fixed height to top + bottom overlap so the line meets the footer’s top border instead of stopping short.

^{Reviewed by Cursor Bugbot for commit b32127f. Configure here.}

[greptile-apps]

Greptile Summary

The PR prevents the fixed documentation sidebar and divider from running beneath the footer.

• Adds a client-side probe that publishes the footer’s viewport overlap through a CSS custom property.
• Uses that overlap to slide the sidebar upward and shorten its divider as the footer enters view.
• Mounts the probe inside the shared site footer.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
apps/docs/components/footer/footer-overlap.tsx	Adds the viewport-overlap measurement and publishes it as a root CSS custom property with scheduled updates and cleanup.
apps/docs/components/footer/footer.tsx	Mounts the overlap probe at the top of the positioned footer.
apps/docs/app/global.css	Applies the measured footer overlap to the desktop sidebar and divider positioning.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  Footer[Footer enters viewport] --> Probe[FooterOverlapProbe measures overlap]
  Probe --> Variable["Set --docs-footer-overlap"]
  Variable --> Sidebar[Move fixed sidebar upward]
  Variable --> Divider[Shorten fixed divider]
  Sidebar --> Result[Stop at footer boundary]
  Divider --> Result

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[waleedlatif1]

@greptile

[waleedlatif1]

@cursor review

[cursor]

✅ Bugbot reviewed your changes and found no new issues!

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^{Reviewed by Cursor Bugbot for commit b32127f. Configure here.}