$timeline-marker-size: .8em !default
$timeline-marker-color: $grey-lighter !default
$timeline-marker-icon-size: 1.5em !default
$timeline-marker-border-size: .1em !default
$timeline-marker-border: $timeline-marker-border-size solid $timeline-marker-color !default
$timeline-line-color: $grey-lighter !default
$timeline-line-width: .1em !default
$timeline-line-style: solid !default
$timeline-line: $timeline-line-width $timeline-line-style $timeline-line-color !default
$timeline-content-padding: 1em 0 0 2em !default
$timeline-rtl-content-padding: 1em 2em 0 0 !default
$timeline-icon-size: $size-small !default
$timeline-header-width: 4em !default
$timeline-item-padding-left: $timeline-header-width / 2 !default
$timeline-item-padding-bottom: 2em !default
$dimensions: 16 24 32 48 64 96 128 !default

.timeline
  display: flex
  flex-direction: column
  .timeline-header
    width: $timeline-header-width
    min-width: $timeline-header-width
    max-width: $timeline-header-width * 2
    word-wrap: normal
    text-align: center
    display: flex
    justify-content: center
  .timeline-item
    display: flex
    display: -ms-flexbox
    display: -webkit-flex
    position: relative
    margin-left: $timeline-item-padding-left
    padding-bottom: $timeline-item-padding-bottom
    &::before
      content: ""
      background-color: $timeline-line-color
      display: block
      width: $timeline-line-width
      height: 100%
      position: absolute
      left: 0
      top: 0

    .timeline-marker
      position: absolute
      background: $timeline-marker-color
      border: $timeline-marker-border
      border-radius: 100%
      content: ""
      display: block
      height: $timeline-marker-size
      left: -(($timeline-marker-size / 2) - $timeline-marker-border-size / 2)
      top: 1.2rem
      width: $timeline-marker-size
      &.is-image
        @each $dimension in $dimensions
          &.is-#{$dimension}x#{$dimension}
            height: $dimension * 1px
            width: $dimension * 1px
            left: ( $dimension / 2 ) * -1px
        background: $timeline-marker-color
        border: $timeline-marker-border
        border-radius: 100%
        display: block
        overflow: hidden
      &.is-icon
        height: $timeline-marker-icon-size
        width: $timeline-marker-icon-size
        left: -(($timeline-marker-icon-size / 2) - $timeline-marker-border-size / 2)
        line-height: .75rem
        padding: $timeline-icon-size / 3
        background: $timeline-marker-color
        border: $timeline-marker-border
        border-radius: 100%
        > i
          color: $white
          font-size: $timeline-icon-size !important
      &.is-outlined
        .image
          background: $white
        &.is-icon
          background: $white
          > i
            color: $timeline-marker-color
      @each $name, $pair in $colors
        $color: nth($pair, 1)
        $color-invert: nth($pair, 2)
        &.is-#{$name}
          background-color: $color !important
          border-color: $color !important
          .image
            border-color: $color !important

          &.is-icon
            background-color: $color !important
            border-color: $color !important
            > i
              color: $color-invert !important
          &.is-outlined
            background-color: $white !important
            border-color: $color !important
            .image
              background-color: $white !important
            &.is-icon
              background-color: $white !important
              > i
                color: $color !important
    .timeline-content
      padding: 1em 0 0 .5em
      padding: $timeline-content-padding
      .heading
        font-weight: $weight-semibold

    @each $name, $pair in $colors
      $color: nth($pair, 1)
      $color-invert: nth($pair, 2)
      &.is-#{$name}
        &::before
          background-color: $color

  &.is-centered
    .timeline-header
      display: flex
      width: 100%
      align-self: center
    .timeline-item
      width: 50%
      align-self: flex-end
      &:nth-of-type(2n)
        align-self: flex-start
        margin-left: 0
        margin-right: $timeline-header-width / 2
        &::before
          right: -$timeline-line-width
          left: auto
        .timeline-marker
          left: auto
          right: -(($timeline-marker-size / 2) - $timeline-marker-border-size / 2) - $timeline-line-width
          &.is-image
            @each $dimension in $dimensions
              &.is-#{$dimension}x#{$dimension}
                left: auto
                right: ( $dimension / 2 ) * -1px
          &.is-icon
            left: auto
            right: -(($timeline-marker-icon-size / 2) - $timeline-marker-border-size / 2) - $timeline-line-width
        .timeline-content
          padding: $timeline-rtl-content-padding
          text-align: right
          display: flex
          flex-direction: column
          align-items: flex-end
          flex-basis: 100%
      &:nth-of-type(2n+1)
        &::before
          content: ""
          background-color: $timeline-line-color
          display: block
          width: $timeline-line-width
          height: 100%
          position: absolute
          top: 0

  &.is-rtl
    justify-content: flex-end
    align-items: flex-end
    .timeline-item
      justify-content: flex-end
      border-left: none
      &::before
        right: 0
        left: auto
      margin-left: 0
      margin-right: $timeline-header-width / 2
      .timeline-marker
        left: auto
        right: -(($timeline-marker-size / 2) - $timeline-marker-border-size / 2)
        &.is-image
          @each $dimension in $dimensions
            &.is-#{$dimension}x#{$dimension}
              left: auto
              right: ( $dimension / 2 ) * -1px
        &.is-icon
          left: auto
          right: -(($timeline-marker-icon-size / 2) - $timeline-marker-border-size / 2)
      .timeline-content
        padding: $timeline-rtl-content-padding
        text-align: right
