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+---
+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