23 · WCAG 2.2 AA is the floor; the goal is higher

Accessibility

Heliodore is used by an exhausted doctor and read by a patient with poor eyesight. Accessibility is not an extra: it is the main design requirement.

Contrast, size, reflow and text alternatives. Nothing depends on color, sound or shape alone.

Everything works with a keyboard and with one finger. 44 px targets, visible focus, no complicated gestures and no required dragging.

Plain language, messages that say what happened and what to do, and predictable behavior. An error never blames.

Check what your screen meets. Each item points to where the rule lives in this manual.

WCAG 2.2 criterion	Heliodore rule
1.4.1 Use of color	An icon with its own shape and a word in every state
1.4.3 and 1.4.11 Contrast	4.5:1 for text and 3:1 for components; yellow is never text on a light background
1.4.4 and 1.4.10 Zoom and reflow	Up to 200% and a 320 px width without losing content
1.4.12 Text spacing	Containers grow with the text; no fixed heights
2.4.7 and 2.4.11 Focus	A visible 3 px ring that fixed bars never cover
2.5.7 Dragging	Moving an appointment can also be done with “Change the time”, without dragging
2.5.8 Target size	44 px, above the 24 px minimum
3.3.1 and 3.3.3 Errors	Text next to the field, what happened and how to fix it
3.3.7 Redundant entry	Information already given is never asked for again (for example, the national ID number, or cédula)
3.3.8 Accessible authentication	Pasting and password managers work; no memory tests

Element	Should be announced as
Agenda row	“Appointment, 9:00 a.m., Example Patient A, checkup, confirmed”
Icon button	“Print confirmation, button”
Field with an error	“Phone, text field, invalid. The phone number is missing digits.”
Switch	“Remind one day before, switch, on”
Notice	“Appointment saved for Tuesday at 9:00 a.m.” (announced without moving focus)

Tab and Shift+Tab: Move through the controls in visual order.
Enter and Space: Activate buttons and checkboxes.
Arrow keys: Change the time in the list of open slots and the option within a group.
Esc: Closes dialogs and returns focus to the button that opened them.
Shortcuts: Only with a modifier key, never single letters, and with an option to turn them off.