---
epic: 14
story: 14.3
title: "Keyboard-Only Operation"
status: draft
---

## Epic 14 — Accessibility & Internationalization
**Goal:** Make CalcPad usable by everyone regardless of ability, language, or locale.

### Story 14.3: Keyboard-Only Operation

As a user who cannot use a mouse,
I want to perform every CalcPad action using only the keyboard,
So that I have full access to all features without requiring a pointing device.

**Acceptance Criteria:**

**Given** the CalcPad application on any platform
**When** the user presses Tab
**Then** focus moves through all interactive elements in a logical, predictable order: toolbar, sheet lines, sidebar, dialogs
**And** a visible focus indicator is always present on the focused element

**Given** the user is navigating the sheet
**When** keyboard shortcuts are used
**Then** Arrow Up/Down moves between lines
**And** Enter creates a new line below the current line
**And** Cmd/Ctrl+Shift+K deletes the current line
**And** Cmd/Ctrl+/ toggles a comment on the current line
**And** Escape dismisses any open dropdown, autocomplete, or dialog

**Given** any dropdown, autocomplete suggestion list, or modal dialog is visible
**When** the user interacts via keyboard
**Then** Arrow keys navigate options, Enter selects, and Escape dismisses
**And** focus is trapped inside modal dialogs until they are dismissed

**Given** the complete set of CalcPad features (file operations, export, settings, theme switching, sharing)
**When** the feature is audited for keyboard access
**Then** every feature is reachable and operable without a mouse
**And** no interaction requires hover, drag-and-drop, or right-click as the only means of access
