Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “datepicker3” was here.
The first occurrence of ID “” was here.
The “type” attribute is unnecessary for JavaScript resources.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “bootstrap” was here.
The first occurrence of ID “magnific-popup” was here.
The first occurrence of ID “pnotify” was here.
This document appears to be written in Polish. Consider adding “lang="pl"” (or variant) to the “html” start tag.
Errors:
Bad value “https://fonts.googleapis.com/css?family=Shadows+Into+Light+Two|Open+Sans:400,300,300italic,400italic,600,700,600italic,700italic,800,800italic&subset=latin,latin-ext” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Duplicate ID “datepicker3”.
Bad value “” for attribute “id” on element “link”: An ID must not be the empty string.
Duplicate ID “”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The element “button” must not appear as a descendant of the “a” element.
Duplicate ID “bootstrap”.
Duplicate ID “magnific-popup”.
Bad value “” for attribute “id” on element “script”: An ID must not be the empty string.
Duplicate ID “pnotify”.
Poland PL