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claude-code - 💡(How to fix) Fix [Cowork] Sidebar panel overlaps chat area and obscures message input box [1 comments, 2 participants]

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anthropics/claude-code#53109•Fetched 2026-04-25 06:12:08
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Yasmar300Yasmar300
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github-actions[bot]github-actions[bot]Yasmar300Yasmar300
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Error Message

Error Messages/Logs

RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

When the Cowork sidebar panel is opened, it renders as a floating overlay on top of the main conversation area instead of docking alongside the content. This causes two problems: (1) the left portion of conversation text is hidden behind the panel — responses appear mid-sentence — and (2) the white message input box is partially or fully obscured, making it impossible to type without first closing the panel every time.

Steps to reproduce:

  1. Open Claude desktop app in Cowork mode
  2. Click the Cowork button to open the sidebar panel
  3. Panel overlays the chat area — text cut off on the left, input box obscured

Expected: sidebar docks alongside content, or floats without covering the input box Actual: panel renders as a floating layer over the conversation

Claude desktop: 1.4758.0 (fb266c) — built 2026-04-24 macOS: Tahoe 26.3.1(a) Display: standard, no custom scaling

<img width="2600" height="1621" alt="Image" src="https://github.com/user-attachments/assets/aa2db015-bd8c-43a7-83c3-f537dde29f98" />

What Should Happen?

Identify why and fix it.

Error Messages/Logs

Steps to Reproduce

It happens any time that I shrink the screen down so that the sidebar overlaps.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

Claude 1.4758.0 (fb266c) 2026-04-24T20:22:30.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

extent analysis

TL;DR

The issue can likely be fixed by adjusting the CSS styling of the Cowork sidebar panel to dock alongside the content area instead of overlaying it.

Guidance

  • Investigate the CSS classes applied to the Cowork sidebar panel and the main conversation area to identify any conflicting styles that may be causing the overlay behavior.
  • Check the CSS media queries to ensure that the layout is properly adjusted for different screen sizes, as the issue occurs when the screen is shrunk down.
  • Consider adding a position: relative or position: absolute style to the conversation area and adjusting the top, left, or right properties to create space for the sidebar panel.
  • Verify that the issue is not caused by a third-party library or framework by inspecting the HTML structure and CSS styles applied to the elements.

Example

No code snippet can be provided without modifying the original codebase, but an example of how to adjust the CSS styling could be:

.conversation-area {
  position: relative;
  padding-right: 200px; /* create space for the sidebar panel */
}

.cowork-sidebar-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
}

Notes

The provided information does not include the actual CSS code or HTML structure, so the suggested fix is based on general CSS principles. The issue may be caused by a more complex interaction between CSS styles, JavaScript code, or third-party libraries.

Recommendation

Apply a workaround by adjusting the CSS styling of the Cowork sidebar panel and conversation area to achieve the desired docking behavior, as the root cause of the issue is likely related to CSS conflicts or media query issues.

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