WCAG 2.2 AA is the target here.

What has been checked

Semantic page structure with one heading level at a time and no skipped levels. A skip link to the main content. Every interactive element reachable and operable by keyboard, with a visible focus ring. The navigation drawer closes on Escape and returns focus to the button that opened it. Alternative text on every image. Colour contrast at 4.5:1 for body text and 3:1 for large text, in both light and dark themes. Motion is reduced or removed when your system asks for that.

What has not been checked

No independent accessibility audit has been carried out, and the site has not been tested with every screen reader and browser combination. Calendly's booking overlay is a third-party component with its own accessibility behaviour, which I do not control.

If something blocks you

Email sadekul@sadekulislam.com with the page and what stopped you. A barrier that stops someone using the site is a bug, and I fix it as one.