CSS Fixed position with Auto Margin

Question

I want a component that keeps horizontal center of the page (two-columns), and I have a sub-component (right column) that I want its position to be fixed, so the sub-compone

Answer 1

I like to use a wrapper as asolution for this problem:

.wrapper {
  position: fixed;
  width: 100%;
  top: 0px;
}
.wrapper .right {
  width: 500px;
  margin: auto;
}