“Everything should be made as simple as possible, but no simpler.” – Albert Einstein ¹

Quantum CSS is an atomic CSS library written in SCSS.

You won’t need to write any CSS rules and media queries while using Quantum CSS. Creating highly responsive UIs becomes pleasure while extension pattern provides means of controlled customization. You can create molecules with avaialble atoms using @extend.

Here is a sample button component with rounded corners, hover and focus transition animations (which are disabled on small screens to provide better experience on touch devices):

<button class="btn btn-fb" type="button">
  <!-- Content -->
</button>

.btn {
  @extend .px15, .h40; // Size
  @extend .bds-s, .bdw1, .bdr5; // Border style solid, border width 1px and rounded corners
  @extend .trp-c, .trd200ms; // Color transitions

  &-fb  { @extend .bgc-fb, .c-w, .bdc-tt, .SM_bgc-dfb-hf } // Facebook
  &-tw  { @extend .bgc-tw, .c-w, .bdc-tt, .SM_bgc-dtw-hf } // Twitter
}

Benefits of using @extend approach:

• Highly standardized styles. Limited amount of building blocks allows you to have more order in your design.

• Stylesheet compilation time errors. Build fails if unknown atoms are used.

• Easy to remember class names. Atoms naming convention was heavily inspired by Emmet, and most of the time abbreviations are first letters of words that property or value names consist of.

1. Naming Conventions

• Value Aliases
• Color Values
• Unit-less Properties

1. Breakpoints

2. Pseudo-classes and Pseudo-elements

3. Grid System

• Containers
• Rows
• Columns
• Column Ordering

1. Atom Index

• Name Pattern

• Background
  background-color
background-attachment
background-clip
background-image
background-origin
background-repeat
background-size

  background-position
background-position-x
background-position-y

  fill

• Border
  border-color
border-top-color
border-right-color
border-bottom-color
border-left-color

  border-width
border-top-width
border-right-width
border-bottom-width
border-left-width

  border-style
border-top-style
border-right-style
border-bottom-style
border-left-style

  border-radius
border-top-right-radius
border-top-left-radius
border-bottom-right-radius
border-bottom-left-radius

• Images
  object-fit

• Transforms
  transform

• Flexible Box Layout
  flex-direction
flex-wrap
flex-grow
flex-shrink
flex-basis
justify-content
align-items
align-content
align-self
order

• Positioning
  float
clear
position
top
right
bottom
left
z-index

• Fonts
  font-size
line-height
font-family
font-weight
font-style
font-variant
font-size-adjust
font-stretch
-webkit-font-smoothing
-moz-osx-font-smoothing

• Transitions
  transition-property
transition-duration
transition-timing-function

• Text
  letter-spacing
overflow-wrap
text-align
text-align-last
text-indent
text-decoration
text-transform
white-space
word-break
word-wrap

• Lists and Counters
  list-style
list-style-position
list-style-type

• Colors
  color
opacity

• Box Model
  box-sizing
height
width
margin
padding
overflow
overflow-x
overflow-y
-webkit-overflow-scrolling
visibility

• Page
  page-break-before
page-break-inside
page-break-after

• User Interface
  cursor
resize
text-overflow
user-select

• Table
  border-collapse
caption-side
empty-cells
table-layout
vertical-align

• Miscellaneous
  display

1. License

In Quantum CSS every class name consists of four parts in given order:

1. Optional breakpoint name: SM, MD etc.
2. Property abbreviation: bdtc, ws etc.
3. Value abbreviation: w, 100p, 360d etc.
4. Optional pseudo-class or pseudo-element modifier: hf, h etc.

You can configure separators between each parts of class name with following variables:

• $breakpoint-sep define separator between breakpoint name and property abbreviation.

• $literal-sep and $ordinal-sep define separators that are inserted between property name and literal value abbreviation or ordinal one respectively.

• $pseudo-sep defines separator between pseudo modifier from value abbreviation.

Aliases for commonly used values:

• p → %
• e → em
• x → ex
• r → rem
• d → deg
• t → turn

These aliases are used instead of full units:

• w100p → width: 100%
• SM_mah42 → @media (min-width: 576px) { max-height: 42px }

Names for colors are used fo increase readability. By default, Tango palette is used for every color-related atom. You can specify your own palette overriding variables in _variables.scss.

1. White w | #fff
2. Grey 15% g1 | #eeeeec
3. Grey 30% g2 | #d3d7cf
4. Grey 45% g3 | #babdb6
5. Grey 60% g4 | #888a85
6. Grey 75% g5 | #555753
7. Grey 90% g6 | #2e3436
8. Black b | #000

9. Yellow y | #fce94f | #edd400 | #c4a000
10. Orange o | #fcaf3e | #f57900 | #ce5c00
11. Chocolate c | #e9b96e | #c17d11 | #8f5902
12. Green g | #8ae234 | #73d216 | #4e9a06
13. Navy n | #729fcf | #3465a4 | #204a87
14. Purple p | #ad7f8a | #75507b | #5c3566
15. Red r | #ef2929 | #cc0000 | #a40000

CSS-literal colors:

• cc → currentColor
• t → transparent
• i → inherit

Generated atom examples:

• SM_bgc-dg → background-color: #4e9a06 Dark green
• bdrc-w → border-right-color: white
• LG_c-b → color: black

Some CSS properties are defined as unit-less, e.g. no unit suffix will be outputted:

• lh1 → line-height: 1
• fw400 → font-weight: 400
• op37 → opacity: 0.37

One of the most powerful features of Quantum is breakpoint-based media queries.

You can configure set of pseudo-classes and pseudo-elements for which atoms are generated via $pseudos. To emit disjunction of pseudos use comma-separated list.

$pseudos: (hf: (hover, focus));

.c-w-hf:hover,
.c-w-hf:focus {
  color: white;
}

Space-separated list defines selector conjunction:

$pseudos: (eh: empty hover);

.c-w-eh:empty:hover {
  color: white;
}

Combine those different list types for precise class targeting:

$pseudos: (foo: (active hover, active focus));

.c-w-foo:active:hover,
.c-w-foo:active:focus {
  color: white;
}

As well as in Bootstrap Containers are the most basic layout element and are required when using grid system. Use g-f to create a fixed-width centered responsive layout of columns.

While containers can be nested, most layouts do not require a nested container.

<div class="g g-f">
  <!-- Fixed-width grid conteiner -->
</div>

Widths of fixed-width container are stored in $grid-widths.

Rows are horizontal groups of columns that ensure your columns are lined up properly.

<div class="g g-f">
  <div class="gr">
    <!-- Place columns here -->
  </div>
</div>

Content should be placed within columns, and only columns may be immediate children of rows.

Column classes indicate the number of columns you’d like to use out of the possible 12 per row. So if you want three equal-width columns, you’d use SM_gc4. You can change number of columns in grid altering $grid-col-count.

Column widths are set in percentages, so they’re always fluid and sized relative to their parent element.

Columns have horizontal padding to create the gutters between individual columns. Gutters can be configured per every breakpoint via $grid-gutters.

<div class="g g-f">
  <div class="gr">
    <div class="gc12 SM_gc6">
      <!-- Place content here -->
    </div>
  </div>
</div>

In addition to column clearing at responsive breakpoints, you may need to reset offsets, pushes, or pulls.

Move columns to the right using [breakpoint_]go(0…12/1) classes. These classes increase the left margin of a column by specified number of columns. For example, MD_go4 moved MD_gc4 over four columns.

Change the order of columns by relatively shifting them to the left with [breakpoint_]gsl(0…12/1) or to the right with [breakpoint_]gsr(0…12/1) classes.

<div class="g g-f">
  <div class="gr">
    <div class="gc12 SM_gc6 SM_go3">
      <!-- Place content here -->
    </div>
  </div>
</div>

Values for each atom are listed in the order they are listed in generated CSS.

• (1…10/2) Range of possible values from 1 to 10 with step 2.
• [breakpoint_] and [-pseudo] Optional breakpoint and pseudo-element or pseudo-class.
• {key} and {value} Placeholders for map key and map value.

Example [breakpoint_]fw(100…900/100) expands to fw100, fw200 … SM_fw100, SM_fw200 … LG_fw900.

[breakpoint_]bgc{key}[-pseudo] → background-color: {value}

Specify mapping in $background-colors: (key: value).

1. bga-f → fixed
2. bga-s → scroll

1. bgcp-bb → border-box
2. bgcp-pb → padding-box
3. bgcp-cb → content-box
4. bgcp-i → inherit

1. bgi-n → none
2. bgi-i → inherit

1. bgo-bb → border-box
2. bgo-pb → padding-box
3. bgo-cb → content-box

1. bgr-n → no-repeat
2. bgr-x → repeat-x
3. bgr-y → repeat-y
4. bgr-s → space
5. bgr-r → round

1. bgz-a → auto
2. bgz-ct → contain
3. bgz-cv → cover

1. bgp-tc → top center
2. bgp-tl → top left
3. bgp-cr → center right
4. bgp-cc → center center
5. bgp-cl → center left
6. bgp-br → bottom right
7. bgp-bc → bottom center
8. bgp-bl → bottom left

1. bgpx-r → right
2. bgpx-c → center
3. bgpx-l → left

1. bgpy-t → top
2. bgpy-c → center
3. bgpy-b → bottom

[breakpoint_]fi{key}[-pseudo] → fill: {value}

Specify mapping in $background-colors: (key: value).

1. [breakpoint_]bdc{key}[-pseudo] → border-color: {value}
2. [breakpoint_]bdxc{key}[-pseudo] = bdlc{key}, bdrc{key}
3. [breakpoint_]bdyc{key}[-pseudo] = bdtc{key}, bdbc{key}
4. [breakpoint_]bdtc{key}[-pseudo] → border-top-color: {value}
5. [breakpoint_]bdbc{key}[-pseudo] → border-bottom-color: {value}
6. [breakpoint_]bdrc{key}[-pseudo] → border-right-color: {value}
7. [breakpoint_]bdlc{key}[-pseudo] → border-left-color: {value}

Specify mapping in $border-colors: (key: value).

1. [breakpoint_]bdw{key} → border-width: {value}
2. [breakpoint_]bdxw{key} = bdlw{key}, bdrw{key}
3. [breakpoint_]bdyw{key} = bdtw{key}, bdbw{key}
4. [breakpoint_]bdtw{key} → border-top-width: {value}
5. [breakpoint_]bdbw{key} → border-bottom-width: {value}
6. [breakpoint_]bdrw{key} → border-right-width: {value}
7. [breakpoint_]bdlw{key} → border-left-width: {value}

Specify mapping in $border-widths: (key: value).

1. [breakpoint_]bds{key} → border-style: {value}
2. [breakpoint_]bdxs{key} = bdls{key}, bdrs{key}
3. [breakpoint_]bdys{key} = bdts{key}, bdbs{key}
4. [breakpoint_]bdts{key} → border-top-style: {value}
5. [breakpoint_]bdbs{key} → border-bottom-style: {value}
6. [breakpoint_]bdrs{key} → border-right-style: {value}
7. [breakpoint_]bdls{key} → border-left-style: {value}

Specify mapping in $border-styles: (key: value).

By default, all available border styles are included. Border style atoms are emitted for every breakpoint what can cause significant increase of outputted CSS file. Be sure to remove unused border styles in order to reduce file size.

1. [breakpoint_]bdr{key} → border-radius: {value}
2. [breakpoint_]bdtr{key} = bdtlr{key}, bdtrr{key}
3. [breakpoint_]bdrr{key} = bdtrr{key}, bdbrr{key}
4. [breakpoint_]bdbr{key} = bdblr{key}, bdbrr{key}
5. [breakpoint_]bdlr{key} = bdtlr{key}, bdblr{key}
6. [breakpoint_]bdtrr{key} → border-top-right-radius: {value}
7. [breakpoint_]bdtlr{key} → border-top-left-radius: {value}
8. [breakpoint_]bdbrr{key} → border-bottom-right-radius: {value}
9. [breakpoint_]bdblr{key} → border-bottom-left-radius: {value}

Specify mapping in $border-radiuses: (key: value).

1. of-n → none
2. of-f → fill
3. of-ct → contain
4. of-cv → cover
5. of-sd → scale-down
6. of-i → inherit

1. ts-n → none
2. ts-i → inherit
3. tsr(45d…360/45d) → transform: rotate(45deg)…rotate(360deg)
4. tsr(-45d…-360/-45d) → transform: rotate(-45deg)…rotate(-360deg)
5. tss(0…200/25) → transform: scale(0)…scale(2)

These shortcuts are available if display atom is included.

1. [breakpoint_]fx-r = d-fx, fxd-r
2. [breakpoint_]fx-rr = d-fx, fxd-rr
3. [breakpoint_]fx-c = d-fx, fxd-c
4. [breakpoint_]fx-cr = d-fx, fxd-cr

1. [breakpoint_]fxd-r → row
2. [breakpoint_]fxd-rr → row-reverse
3. [breakpoint_]fxd-c → column
4. [breakpoint_]fxd-cr → column-reverse

1. [breakpoint_]fxw-n → nowrap
2. [breakpoint_]fxw-w → wrap
3. [breakpoint_]fxw-wr → wrap-reverse

[breakpoint_]fxg(0…10/1) → flex-grow: 0…10

[breakpoint_]fxs(0…10/1) → flex-shrink: 0…10

1. [breakpoint_]fxb-a → auto
2. [breakpoint_]fxb-mac → max-content
3. [breakpoint_]fxb-mic → min-content
4. [breakpoint_]fxb-fc → fit-content
5. [breakpoint_]fxb-c → content

1. [breakpoint_]jc-fs → flex-start
2. [breakpoint_]jc-fe → flex-end
3. [breakpoint_]jc-c → center
4. [breakpoint_]jc-sb → space-between
5. [breakpoint_]jc-sa → space-around

1. [breakpoint_]ai-fs → flex-start
2. [breakpoint_]ai-fe → flex-end
3. [breakpoint_]ai-c → center
4. [breakpoint_]ai-bs → baseline
5. [breakpoint_]ai-s → stretch

1. [breakpoint_]ac-fs → flex-start
2. [breakpoint_]ac-fe → flex-end
3. [breakpoint_]ac-c → center
4. [breakpoint_]ac-sb → space-between
5. [breakpoint_]ac-sa → space-around
6. [breakpoint_]ac-s → stretch

1. [breakpoint_]as-a → auto
2. [breakpoint_]as-fs → flex-start
3. [breakpoint_]as-fe → flex-end
4. [breakpoint_]as-c → center
5. [breakpoint_]as-b → baseline
6. [breakpoint_]as-s → stretch

[breakpoint_]ord(0…10/1) → order: 0…10

1. [breakpoint_]fl-l → left
2. [breakpoint_]fl-r → right
3. [breakpoint_]fl-n → none

1. cl-l → left
2. cl-r → right
3. cl-b → both
4. cl-n → none

1. pos-s → static
2. pos-a → absolute
3. pos-r → relative
4. pos-f → fixed

1. [breakpoint_]t{key} → top: {value}
2. [breakpoint_]r{key} → right: {value}
3. [breakpoint_]b{key} → bottom: {value}
4. [breakpoint_]l{key} → left: {value}

Specify mapping in $positions: (key: value).

1. z(0…10/1) → z-index: 0…10
2. z-a → auto
3. z-i → inherit

1. [breakpoint_]fz-xxs → xx-small
2. [breakpoint_]fz-xs → x-small
3. [breakpoint_]fz-s → small
4. [breakpoint_]fz-m → medium
5. [breakpoint_]fz-l → large
6. [breakpoint_]fz-xl → x-large
7. [breakpoint_]fz-xxl → xx-large
8. [breakpoint_]fz-lr → larger
9. [breakpoint_]fz-sr → smaller
10. [breakpoint_]fz-i → inherit
11. [breakpoint_]fz{key} → font-size: {value}

Specify mapping in $font-sizes: (key: value).

1. lh-n → normal
2. lh-i → inherit
3. lh0 → 0
4. lh1 → 1
5. lh{key} → line-height: {value}

Specify mapping in $line-heights: (key: value).

1. [breakpoint_]fs-s → serif
2. [breakpoint_]fs-ss → sans-serif
3. [breakpoint_]fs-m → monospace
4. [breakpoint_]fs-c → cursive
5. [breakpoint_]fs-f → fantasy
6. [breakpoint_]fs-i → inherit
7. [breakpoint_]fs{key} → font-family: {value}

Specify mapping in $font-families: (key: value).

1. [breakpoint_]fw(100…900/100) → font-weight: 100…900
2. [breakpoint_]fw-n → normal
3. [breakpoint_]fw-b → bold
4. [breakpoint_]fw-br → bolder
5. [breakpoint_]fw-lr → lighter
6. [breakpoint_]fw-i → inherit

1. [breakpoint_]fs-n → normal
2. [breakpoint_]fs-i → italic
3. [breakpoint_]fs-o → oblique

1. fv-cl → common-ligatures
2. fv-apc → all-petite-caps
3. fv-asc → all-small-caps
4. fv-sc → small-caps
5. fv-c → contextual
6. fv-df → diagonal-fractions
7. fv-sf → stacked-fractions
8. fv-hf → historical-forms
9. fv-hl → historical-ligatures
10. fv-i → inherit
11. fv-n → normal
12. fv-tn → tabular-nums
13. fv-pn → proportional-nums
14. fv-pw → proportional-width

fza-n → none

1. fst-n → normal
2. fst-uc → ultra-condensed
3. fst-ec → extra-condensed
4. fst-c → condensed
5. fst-sc → semi-condensed
6. fst-se → semi-expanded
7. fst-e → expanded
8. fst-ee → extra-expanded
9. fst-ue → ultra-expanded

1. wfsm-a → antialiased
2. wfsm-sa → subpixel-antialiased
3. wfsm-n → none

1. mfsm-a → auto
2. mfsm-g → grayscale

1. trp-n → none
2. trp-a → all

trd(100ms…1000ms/100ms) → transition-duration: 100ms…1000ms

1. trtf-e → ease
2. trtf-ei → ease-in
3. trtf-eo → ease-out
4. trtf-eio → ease-in-out
5. trtf-l → linear
6. trtf-ss → step-start
7. trtf-se → step-end

1. ls-n → normal
2. ls-i → inherit
3. ls{key} → letter-spacing: {value}

Specify mapping in $letter-spacings: (key: value).

1. ovw-n → normal
2. ovw-b → break-word

1. [breakpoint_]ta-l → left
2. [breakpoint_]ta-c → center
3. [breakpoint_]ta-r → right
4. [breakpoint_]ta-j → justify

1. [breakpoint_]tal-l → left
2. [breakpoint_]tal-c → center
3. [breakpoint_]tal-r → right
4. [breakpoint_]tal-j → justify

ti{key} → text-indent: {value}

Specify mapping in $text-indents: (key: value).

1. [breakpoint_]td-n[-pseudo] → none
2. [breakpoint_]td-u[-pseudo] → underline
3. [breakpoint_]td-o → overline
4. [breakpoint_]td-lt → line-through

1. tt-c → capitalize
2. tt-u → uppercase
3. tt-l → lowercase
4. tt-n → none
5. tt-fw → full-width

1. [breakpoint_]ws-n → normal
2. [breakpoint_]ws-p → pre
3. [breakpoint_]ws-nw → nowrap
4. [breakpoint_]ws-pw → pre-wrap
5. [breakpoint_]ws-pl → pre-line

1. wob-n → normal
2. wob-ka → keep-all
3. wob-ba → break-all

1. wow-n → normal
2. wow-bw → break-word

1. lis-n → none
2. lis-i → inherit

1. lisp-in → inside
2. lisp-o → outside
3. lisp-i → inherit

1. list-n → none
2. list-d → disc
3. list-c → circle
4. list-s → square
5. list-dc → decimal
6. list-dclz → decimal-leading-zero
7. list-lr → lower-roman
8. list-ur → upper-roman
9. list-i → inherit

[breakpoint_]c{key}[-pseudo] → color: {value}

Specify mapping in $colors: (key: value).

op(0…100/1) → opacity: 0…1

bxs{key}[-pseudo] → box-shadow: {value}

Specify mapping in $box-shadows: (key: value).

1. bxz-cb → content-box
2. bxz-bb → border-box
3. bxz-i → inherit

1. [breakpoint_]h{key} → height: {value}
2. [breakpoint_]mah-n → max-height: none
3. [breakpoint_]mah{key} → max-height: {value}
4. [breakpoint_]mih{key} → min-height: {value}

Specify mapping in $heights: (key: value).

1. [breakpoint_]w{key} → width: {value}
2. [breakpoint_]maw-n → max-width: none
3. [breakpoint_]maw{key} → max-width: {value}
4. [breakpoint_]miw{key} → min-width: {value}

Specify mapping in $widths: (key: value).

1. [breakpoint_]m{key} → margin: {value}
2. [breakpoint_]mx-a → margin-left: auto, margin-right: auto
3. [breakpoint_]mx{key} = ml{key}, mr{key}
4. [breakpoint_]my{key} = mt{key}, mb{key}
5. [breakpoint_]mt{key} → margin-top: {value}
6. [breakpoint_]mr{key} → margin-right: {value}
7. [breakpoint_]mb{key} → margin-bottom: {value}
8. [breakpoint_]ml{key} → margin-left: {value}

Specify mapping in $margins: (key: value).

1. [breakpoint_]p{key} → padding: {value}
2. [breakpoint_]px{key} = pl{key}, pr{key}
3. [breakpoint_]py{key} = pt{key}, pb{key}
4. [breakpoint_]pt{key} → padding-top: {value}
5. [breakpoint_]pr{key} → padding-right: {value}
6. [breakpoint_]pb100p → padding-bottom: 100%
7. [breakpoint_]pb{key} → padding-bottom: {value}
8. [breakpoint_]pl{key} → padding-left: {value}

Specify mapping in $paddings: (key: value).

1. ov-v → visible
2. ov-h → hidden
3. ov-s → scroll
4. ov-a → auto

1. ovx-v → visible
2. ovx-h → hidden
3. ovx-s → scroll
4. ovx-a → auto

1. ovy-v → visible
2. ovy-h → hidden
3. ovy-s → scroll
4. ovy-a → auto

1. wovs-t → touch
2. wovs-a → auto

1. [breakpoint_]v-v → visible
2. [breakpoint_]v-h → hidden
3. [breakpoint_]v-c → collapse

1. pgbb-a → auto
2. pgbb-al → always
3. pgbb-av → avoid
4. pgbb-l → left
5. pgbb-r → right

1. pgbi-a → auto
2. pgbi-av → avoid

1. pgba-a → auto
2. pgba-al → always
3. pgba-av → avoid
4. pgba-l → left
5. pgba-r → right

1. cur-a → auto
2. cur-d → default
3. cur-cm → context-menu
4. cur-h → help
5. cur-p → pointer
6. cur-ps → progress
7. cur-w → wait
8. cur-cl → cell
9. cur-c → crosshair
10. cur-t → text
11. cur-al → alias
12. cur-cp → copy
13. cur-m → move
14. cur-nd → no-drop
15. cur-na → not-allowed
16. cur-as → all-scroll
17. cur-cr → col-resize
18. cur-rr → row-resize
19. cur-nr → n-resize
20. cur-er → e-resize
21. cur-sr → s-resize
22. cur-wr → w-resize
23. cur-ner → ne-resize
24. cur-nwr → nw-resize
25. cur-ser → se-resize
26. cur-swr → sw-resize
27. cur-ewr → ew-resize
28. cur-nsr → ns-resize
29. cur-neswr → nesw-resize
30. cur-nwser → nwse-resize
31. cur-zi → zoom-in
32. cur-zo → zoom-out
33. cur-g → grab
34. cur-gr → grabbing
35. cur-n → none

1. rz-n → none
2. rz-b → both
3. rz-h → horizontal
4. rz-v → vertical

1. tov-e → ellipsis
2. tov-c → clip

1. us-n → none
2. us-t → text
3. us-a → all

1. bdce-c → collapse
2. bdce-s → separate
3. bdce-i → inherit

1. cps-t → top
2. cps-b → bottom

1. ec-s → show
2. ec-h → hide

1. tbl-a → auto
2. tbl-f → fixed

1. va-sp → super
2. va-t → top
3. va-tt → text-top
4. va-m → middle
5. va-bs → baseline
6. va-b → bottom
7. va-tb → text-bottom
8. va-sb → sub

1. d-n → none
2. d-b → block
3. d-fx → flex
4. d-li → list-item
5. d-ri → run-in
6. d-i → inline
7. d-itb → inline-table
8. d-ifx → inline-flex
9. d-ib → inline-block
10. d-tb → table
11. d-tcp → table-caption
12. d-tc → table-column
13. d-tcg → table-column-group
14. d-thg → table-header-group
15. d-tfg → table-footer-group
16. d-tr → table-row
17. d-trg → table-row-group
18. d-tcl → table-cell
19. d-rb → ruby
20. d-rbb → ruby-base
21. d-rbbc → ruby-base-container
22. d-rbt → ruby-text
23. d-rbtc → ruby-text-container

The code is available under MIT licence.