using offset in bootstrap 4 code example

Example 1: .col-12 bootstrap

.col-12{
	flex: 0 0 100%;
	max-width: 100%;
}

Example 2: offset bootstrap

$grid-breakpoints: (
  xs: 0,
  sm: 480px,
  md: 768px,
  lg: 1024px
);

$container-max-widths: (
  sm: 420px,
  md: 720px,
  lg: 960px
);