freeCodeCamp/public/css/lib/bootstrap/grid.less

//
// Grid system
// --------------------------------------------------

// Container widths
//
// Set the container width, and override it for fixed navbars in media queries.

.container {
  .container-fixed();

  @media (min-width: @screen-sm-min) {
    width: @container-sm;
  }
  @media (min-width: @screen-md-min) {
    width: @container-md;
  }
  @media (min-width: @screen-lg-min) {
    width: @container-lg;
  }
}

// Fluid container
//
// Utilizes the mixin meant for fixed width containers, but without any defined
// width for fluid, full width layouts.

.container-fluid {
  .container-fixed();
}

// Row
//
// Rows contain and clear the floats of your columns.

.row {
  .make-row();
}

// Columns
//
// Common styles for small and large grid columns

.make-grid-columns();

// Extra small grid
//
// Columns, offsets, pushes, and pulls for extra small devices like
// smartphones.

.make-grid(xs);

// Small grid
//
// Columns, offsets, pushes, and pulls for the small device range, from phones
// to tablets.

@media (min-width: @screen-sm-min) {
  .make-grid(sm);
}

// Medium grid
//
// Columns, offsets, pushes, and pulls for the desktop device range.

@media (min-width: @screen-md-min) {
  .make-grid(md);
}

// Large grid
//
// Columns, offsets, pushes, and pulls for the large desktop device range.

@media (min-width: @screen-lg-min) {
  .make-grid(lg);
}