chrome/browser/resources/chromeos/arc_support/layout_style.css

.layout.horizontal,
.layout.horizontal-reverse,
.layout.vertical,
.layout.vertical-reverse {
  display: flex;
  min-height: 0;
}

.layout.inline {
  display: inline-flex;
  min-height: 0;
}

.layout.horizontal {
  flex-direction: row;
}

.layout.horizontal-reverse {
  flex-direction: row-reverse;
}

.layout.vertical {
  flex-direction: column;
}

.layout.vertical-reverse {
  flex-direction: column-reverse;
}

.flex {
  flex: 1;
}

.flex-grow {
  flex: 1 0 auto; /* flex-grow flex-shrink flex-basis */
}

/* alignment in cross axis */

.layout.start {
  align-items: flex-start;
}

.layout.center {
  align-items: center;
}

.layout.end {
  align-items: flex-end;
}

.layout.stretch {
  align-items: stretch;
}

/* alignment in main axis */

.layout.start-justified {
  justify-content: flex-start;
}

.layout.center-justified {
  justify-content: center;
}

.layout.end-justified {
  justify-content: flex-end;
}

.layout.around-justified {
  justify-content: space-around;
}

.layout.justified {
  justify-content: space-between;
}

/* wrapping */

.layout.wrap {
  flex-wrap: wrap;
}

.layout.no-wrap {
  flex-wrap: nowrap;
}

/* self alignment */

.self-start {
  align-self: flex-start;
}

.self-center {
  align-self: center;
}

.self-end {
  align-self: flex-end;
}

.self-stretch {
  align-self: stretch;
}

/*******************************
          Other Layout
*******************************/

[hidden] {
  display: none !important;
}

.relative {
  position: relative;
}

.fit {
  bottom: 0;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}