# Accessibility Standards & Compliance Report PDFHub is built with an unwavering commitment to digital accessibility, adhering to the **Web Content Accessibility Guidelines (WCAG) 2.1 Level AA** standards. --- ## 1. Contrast Ratios & Visual Ergonomics PDFHub's color system was specifically engineered to ensure high contrast in both dark and light modes: - **Dark Mode:** Text color (`#eeeef8`) against dark surfaces (`#07070d`, `#0f0f1a`) exceeds a contrast ratio of **13.5:1** (far surpassing the WCAG AA requirement of 4.5:1). - **Light Mode:** Deep navy text (`#18182e`) against light surfaces (`#f2f2f8`, `#ffffff`) achieves an exceptional **14.2:1** contrast ratio. - **Accents:** Button text on primary call-to-action buttons uses pure white (`#ffffff`) on deep violet (`#7c6aff`) yielding a contrast ratio of **4.8:1**. --- ## 2. Keyboard Navigation & Focus Management - **Logical Tab Order:** All interactive elements (tool cards, buttons, file drop zones, inputs, select menus, theme toggles) follow a logical, predictable sequential tab order. - **Visible Focus Rings:** Focused elements display prominent focus rings with high contrast outlines (`outline: 2px solid var(--accent)`). - **Modal & Drawer Traps:** When the Control Center menu (`#siteMenu`) or review modal dialogs open, pressing the **Escape** key cleanly closes the overlay and returns focus to the trigger button. --- ## 3. Screen Reader Support & Semantic Landmarks - **Semantic HTML5:** The interface uses proper landmark tags: `
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