@ujesko : Please replace the previous additional css with the css below.
@media screen and (min-width: 90em) {
.single .singular-section,
.page .singular-section
{
padding-top: 0;
}
.singular-section .content-area .post-thumbnail {
margin-top: 0;
}
}
Let me know if this helps you out.
Regards,
Tikaram