papercss/src/components/_progress.scss

.progress {
  @include border-style(5);
  @include color('border-color', 'primary');
  border: 2px solid;
  box-shadow: $shadow-hover;
  height: 1.2rem;
  overflow: hidden;
  width: 100%;

  .bar {
    @include border-style(5);
    @include transition;
    @include color('background-color', 'primary-light');
    @include color('border-color', 'primary');
    border-right: 2px solid;
    display: flex;
    flex-direction: column;
    font-size: 0.6rem;
    height: 100%;
    justify-content: center;
    text-align: center;
    width: 0%;

    &.striped {
      @include striped-background($primary-light);
    }

    @each $colorName, $color, $color-light in $colors {
      &.#{$colorName} {
        @include color('background-color', #{$colorName}-light);
  
        &.striped {
          @include striped-background($color-light);
        }
      }
    }

    @for $i from 0 through 100 {
      &.w-#{$i} {
        width: $i * 1%;
      }
    }
  
    &.w-0,
    &.w-100 {
      border-right: 0;
    }
  }
}