Fix content to the top of the page

Is there any way to fix the content to the top of the page.
My homepage is perfect, but when I navigate within my site it is evident the page has moved down.
Other pages:

Hello there,

Thank you for asking. Could you please try to add the following CSS code through the Simple Custom CSS plugin?{
  padding: 0; 
} .content-wrapper{
  padding-top: 0px !important;

  margin-top: -30px;

.page-template-page_front-page #primary{
  margin-top: 0;

I hope this reply helps.

Warmest regards,