Clear structure before decoration
The interface uses semantic headings, labeled fields, visible result descriptions and a deliberate reading order. Cards and decorative depth do not carry essential information by themselves. Normal links are not underlined; navigation groups, button treatments, spacing, hover and keyboard focus identify interactive elements.
The site aims to support keyboard and screen-reader use. This is not a certification that every browser, theme, plugin or hosting variation has been independently audited.
Keyboard and navigation
Use Tab and Shift+Tab to move through controls. Enter or Space activates controls where appropriate. A skip link appears on focus, letting you reach main content. On small screens the Menu button opens navigation; Escape closes it. FAQ disclosures use native details controls.
A visible outline identifies keyboard focus. Auto / Light / Dark changes the color scheme; the system setting follows your device preference. Reduced-motion preferences turn off the floating animation and transitions.
Forms and results
Fields identify their units and limits. Calculation errors are presented as text and moved into focus. A result is marked stale when an input changes; downloads and print are disabled until recalculation. No important result is communicated by color alone.
Contact Form 7 may supply its own validation and status messages. If any form or control is difficult to use, the support and help email routes remain alternatives.
Report a barrier
Send the page address, task, what prevented completion and any browser or assistive-technology information you are comfortable sharing to support@ofgon.com. Do not send private credentials or records.
We can investigate a reproducible barrier but do not promise an immediate reply or a particular remediation time. Suggestions about labels, contrast, motion and reading order are welcome.