Documentation layout

This single-file page demonstrates a fluid two-pane documentation interface that stays readable on phones, tablets, and large desktop screens without any horizontal scrolling.

Overview

The sidebar contains section navigation, while the content pane presents the primary article. Semantic landmarks and clear heading levels make the structure easy to scan with both keyboard and assistive technology.

Getting started

Use the left rail to jump between sections. The panes are sized with fluid CSS units and a responsive breakpoint so the layout adapts naturally instead of relying on fixed widths.

Responsive layout

On narrow screens the panes stack into a single column with the content below the sidebar. On wider screens they sit side by side, and the content area is allowed to shrink cleanly to avoid overflow.

Accessibility

The markup uses an aside, a nav, and an article so the structure is meaningful before styling is applied. Focus states remain visible, and links are large enough to tap comfortably on touch devices.

Offline use

Everything needed to render the page is embedded directly in this file, so it opens correctly in a browser without a build step, external fonts, scripts, images, or other network requests.