Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
This document appears to be written in Ukrainian but the “html” start tag has “lang="en-GB"”. Consider using “lang="uk"” (or variant) instead.
Errors:
Element “style” not allowed as child of element “header” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
No “p” element in scope but a “p” end tag seen.
Element “style” not allowed as child of element “form” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “alt” on element “input”: Must not be empty.
Element “p” not allowed as child of element “label” in this context. (Suppressing further errors from this subtree.)
Duplicate attribute “maxlength”.
Bad value “” for attribute “name” on element “input”: Must not be empty.
Duplicate attribute “id”.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Bad value “” for attribute “for” on element “label”: An ID must not be the empty string.
Stray start tag “script”.
The “for” attribute of the “label” element must refer to a non-hidden form control.
Ukraine UA