.progress
  width: 100%
  height: 8px
  overflow: hidden
  .progress-bar
    @include transition(width 1s ease 0.5s)
    width: 0
    height: 8px
  &.inverse,
  &.bg-warning
    background: darken($brand-primary, 15%)
    .progress-bar
      background: white
  &.bg-warning
    background: darken($brand-warning, 15%)