.overview
  .primary
    +above(desktop)
      col(0.674, gutter: 1.8)
  .sidebar
    input
      width 100%
    +above(desktop)
      col(1/3)
  .section-header
    display flex
    margin-bottom 8px
    h3 
      margin-right 23% 

    .controls
      position relative
      flex 1 0 auto

.milestones
  .module__data
    & > p
      color bayoux
      margin-bottom 8px
    hr
      margin 16px 0 8px 0
    &.completed
      opacity 0.5
  .markdown
    color body-color
  .section-header:last-child
    margin-bottom 0
    hr
      display none


.overview
  .primary
    +above(desktop)
      col(0.674, gutter: 1.8)
  .sidebar
    input
      width 100%
    +above(desktop)
      col(1/3)
  .section-header
    display flex
    margin-bottom 8px
    h3
      margin-right 20px

    .controls
      position relative
      flex 1 0 auto

.milestones
  .module__data
    & > p
      color bayoux
      margin-bottom 8px
    hr
      margin 16px 0 8px 0
    &.completed
      opacity 0.5
  .markdown
    color body-color
  .section-header:last-child
    margin-bottom 0
    hr
      display none


Use px margin now that parent is flex
Use px margin now that parent is flex
