gecko-dev/testing/web-platform/tests/css/support/grid.css

.grid {
  display: grid;
  background-color: grey;
}

.inline-grid {
  display: inline-grid;
  background-color: grey;
}

.firstRowFirstColumn {
  background-color: blue;
  grid-column: 1;
  grid-row: 1;
}

.onlyFirstRowOnlyFirstColumn {
  background-color: blue;
  grid-column: 1 / 2;
  grid-row: 1 / 2;
}

.firstRowSecondColumn {
  background-color: lime;
  grid-column: 2;
  grid-row: 1;
}

.onlyFirstRowOnlySecondColumn {
  background-color: lime;
  grid-column: 2 / 3;
  grid-row: 1 / 2;
}

.secondRowFirstColumn {
  background-color: purple;
  grid-column: 1;
  grid-row: 2;
}

.onlySecondRowOnlyFirstColumn {
  background-color: purple;
  grid-column: 1 / 2;
  grid-row: 2 / 3;
}

.secondRowSecondColumn {
  background-color: orange;
  grid-column: 2;
  grid-row: 2;
}

.onlySecondRowOnlySecondColumn {
  background-color: orange;
  grid-column: 2 / 3;
  grid-row: 2 / 3;
}

.endSecondRowEndSecondColumn {
  background-color: orange;
  grid-column-end: 3;
  grid-row-end: 3;
}

.thirdRowSecondColumn {
  background-color: red;
  grid-column: 2;
  grid-row: 3;
}

.thirdRowThirdColumn {
  background-color: salmon;
  grid-column: 3;
  grid-row: 3;
}

.firstRowThirdColumn {
  background-color: magenta;
  grid-column: 3;
  grid-row: 1;
}

.secondRowThirdColumn {
  background-color: navy;
  grid-column: 3;
  grid-row: 2;
}

.firstRowFourthColumn {
  background-color: green;
  grid-column: 4;
  grid-row: 1;
}

.secondRowFourthColumn {
  background-color: pink;
  grid-column: 4;
  grid-row: 2;
}

.firstAutoRowSecondAutoColumn {
  grid-row: 1 / auto;
  grid-column: 2 / auto;
}

.autoLastRowAutoLastColumn {
  grid-row: auto / -1;
  grid-column: auto / -1;
}

.autoSecondRowAutoFirstColumn {
  grid-row: auto / 2;
  grid-column: auto / 1;
}

.firstRowBothColumn {
  grid-row: 1;
  grid-column: 1 / -1;
}

.secondRowBothColumn {
  grid-row: 2;
  grid-column: 1 / -1;
}

.bothRowFirstColumn {
  grid-row: 1 / -1;
  grid-column: 1;
}

.bothRowSecondColumn {
  grid-row: 1 / -1;
  grid-column: 2;
}

.bothRowBothColumn {
  grid-row: 1 / -1;
  grid-column: 1 / -1;
}

/* Auto column / row. */
.autoRowAutoColumn {
  background-color: pink;
  grid-column: auto;
  grid-row: auto;
}

.firstRowAutoColumn {
  background-color: blue;
  grid-column: auto;
  grid-row: 1;
}

.secondRowAutoColumn {
  background-color: purple;
  grid-column: auto;
  grid-row: 2;
}

.thirdRowAutoColumn {
  background-color: navy;
  grid-column: auto;
  grid-row: 3;
}

.autoRowFirstColumn {
  background-color: lime;
  grid-column: 1;
  grid-row: auto;
}

.autoRowSecondColumn {
  background-color: orange;
  grid-column: 2;
  grid-row: auto;
}

.autoRowThirdColumn {
  background-color: magenta;
  grid-column: 3;
  grid-row: auto;
}

.autoRowAutoColumnSpanning2 {
  background-color: maroon;
  grid-column: span 2;
  grid-row: auto;
}

.autoRowSpanning2AutoColumn {
  background-color: aqua;
  grid-column: auto;
  grid-row: span 2;
}

.autoRowSpanning2AutoColumnSpanning3 {
  background-color: olive;
  grid-column: span 3;
  grid-row: span 2;
}

.autoRowSpanning3AutoColumnSpanning2 {
  background-color: indigo;
  grid-column: span 2;
  grid-row: span 3;
}

.autoRowFirstColumnSpanning2 {
  background-color: maroon;
  grid-column: 1 / span 2;
  grid-row: auto;
}

.autoRowSecondColumnSpanning2 {
  background-color: olive;
  grid-column: 2 / span 2;
  grid-row: auto;
}

.firstRowSpanning2AutoColumn {
  background-color: maroon;
  grid-column: auto;
  grid-row: 1 / span 2;
  height: 100%;
}

.secondRowSpanning2AutoColumn {
  background-color: olive;
  grid-column: auto;
  grid-row: 2 / span 2;
  height: 100%;
}

/* Grid element flow. */
.gridAutoFlowColumnSparse {
  grid-auto-flow: column;
}

.gridAutoFlowColumnDense {
  grid-auto-flow: column dense;
}

.gridAutoFlowRowSparse {
  grid-auto-flow: row;
}

.gridAutoFlowRowDense {
  grid-auto-flow: row dense;
}

/* This rule makes sure the container is smaller than any grid items to avoid distributing any extra logical space to them. */
.constrainedContainer {
  width: 10px;
  height: 10px;
}

.unconstrainedContainer {
  width: 1000px;
  height: 1000px;
}

.sizedToGridArea {
  font: 10px/1 Ahem;
  /* Make us fit our grid area. */
  width: 100%;
  height: 100%;
}

.verticalRL {
  writing-mode: vertical-rl;
}
.verticalLR {
  writing-mode: vertical-lr;
}
.horizontalTB {
  writing-mode: horizontal-tb;
}
.directionRTL {
  direction: rtl;
}
.directionLTR {
  direction: ltr;
}