RewriteEngine on

RewriteCond &%{QUERY_STRING} &page=([^&]+) [NC]
RewriteRule ^((maincg|printcg)\.php)?$ %1.html [R=301,QSD,L]

RewriteRule pages/(.*)\.php $1.html [R=301,L]

RewriteRule ^cyklogaining.html$ / [R=301,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule !\.(pdf|js|ico|gif|jpg|jpeg|png|webp|svg|css|rar|zip|7z|tar\.gz|map|eot|ttf|otf|woff|woff2)$ index.php [L]

Options -Indexes