css - Right aligned Bootstrap container which also aligns with default container

Question

I've been trying to make a Bootstrap container which "spills out" onto the right hand side of the page but also aligns well with the standard Bootstrap container. So far I have tried duplicating the code for the standard container and altering the max-width values but I can't ever seem to make this align with the standard container. Here is what I have so far:

  width: 100%;
  padding-left: 15px;
  margin-left: auto;
  margin-top: 3rem;

  @media (min-width: 576px) {
    max-width: 675px;
  }
  
  @media (min-width: 768px) {
    max-width: 900px;
  }
  
  @media (min-width: 992px) {
    max-width: 1200px;
  }
  
  @media (min-width: 1200px) {
    max-width: 1425px;
  }

Would anyone be able to help me achieve this?

Answer 1

You can calculate the left margin of the custom container width based on the Bootstrap container width for each breakpoint. In order for it to align with container, the left margin is going to be:

margin-left: calc(50vw - (container width/2))

So the CSS would be:

.container-custom {
   padding-left: 15px;
   padding-right: 15px;
}

@media (min-width:576px){
  .container-custom {
    margin-right: 0;
    margin-left: calc(50vw - 270px);
  }
}

@media (min-width:768px){
  .container-custom {
    margin-right: 0;
    margin-left: calc(50vw - 360px);
  }
}

@media (min-width:992px){
  .container-custom {
    margin-right: 0;
    margin-left: calc(50vw - 480px);
  }
}

@media (min-width:1200px){
  .container-custom {
    margin-right: 0;
    margin-left: calc(50vw - 570px);
  }
}

Demo: https://www.codeply.com/go/gO5EmIIeDi