overleaf/services/web/frontend/stylesheets/bootstrap-5/foundations/elevation.scss

// Cards
@mixin shadow-sm {
  box-shadow: 0 2px 4px 0 rgb(30 37 48 / 16%);
}

// Tooltips, Callouts, Dropdowns, etc.
@mixin shadow-md {
  box-shadow:
    0 4px 12px 0 rgb(30 37 48 / 12%),
    0 2px 4px rgb(30 37 48 / 8%);
}

// Modals, drawers
@mixin shadow-lg {
  box-shadow:
    0 8px 16px 0 rgb(30 37 48 / 12%),
    0 4px 6px 0 rgb(30 37 48 / 12%);
}