          padding-top: calc(var(--height-nav) + 1.5rem)
          z-index: 10
          padding-bottom: 5rem
  
  @include breakpoint(max, sm)
      .root
          flex: 100%
          width: 100%
          margin-top: var(--height-nav)
          display: flex
          flex-flow: row wrap
          width: 100%
  
  .section
      margin-bottom: var(--spacing-sm)
  
      & > *
 
</s> remove     .crumbs
 </s> add     .root
        flex: 100%
        width: 100%
        margin-top: var(--height-nav)
        display: block

    .section </s> remove @include breakpoint(min, md)
    .root
        @include scroll-shadow(var(--color-back), var(--color-shadow), var(--height-nav))
        position: fixed
        top: 0
        left: 0
        width: var(--width-sidebar)
        height: calc(100vh - 3px)
        flex: 0 0 var(--width-sidebar)
        padding-top: calc(var(--height-nav) + 1.5rem)
        z-index: 10
        padding-bottom: 5rem
 </s> add .dropdown
    padding: 1rem 0
    border-bottom: 1px solid var(--color-subtle)
    width: 100% </s> remove @include breakpoint(max, sm)
    .section
        flex: 1 1 0
        padding: 1.25rem 0
        border-bottom: 1px solid var(--color-subtle)
        margin: 0

        &:not(:last-child)
            border-right: 1px solid var(--color-subtle)

 </s> add 
.dropdown-select
    width: 100%
    padding-left: 1rem
          padding-top: calc(var(--height-nav) + 1.5rem)
          z-index: 10
          padding-bottom: 5rem
  
.dropdown-select
    width: 100%
    padding-left: 1rem
.dropdown-select
    width: 100%
    padding-left: 1rem
.dropdown-select
    width: 100%
    padding-left: 1rem
.dropdown-select
    width: 100%
    padding-left: 1rem
.dropdown-select
    width: 100%
    padding-left: 1rem
.dropdown-select
    width: 100%
    padding-left: 1rem
.dropdown-select
    width: 100%
    padding-left: 1rem
.dropdown-select
    width: 100%
    padding-left: 1rem
  
  .section
      margin-bottom: var(--spacing-sm)
  
      & > *
keep keep keep keep replace replace replace replace replace replace replace replace keep keep keep keep keep
 Use dropdown for collapsed sidebar menu 
website/src/styles/sidebar.module.sass