grid-layouts-v2.css

/* Grid version 2 (at first breakpoint)
========================================================================== */

.v2-Grid--1col > .Grid-cell,
.v2-Grid--3on1 > .Grid-cell--4 {
    width: 100%;
}

.v2-Grid--1to3 > .Grid-cell--2,
.v2-Grid--3to1 > .Grid-cell--1 {
    width: 75%;
}

.v2-Grid--1to2 > .Grid-cell--2,
.v2-Grid--2to1 > .Grid-cell--1 {
    width: 66.666%;
}

.v2-Grid--2col > .Grid-cell {
    width: 50%;
}

.v2-Grid--1to2 > .Grid-cell--1,
.v2-Grid--2to1 > .Grid-cell--2,
.v2-Grid--3col > .Grid-cell,
.v2-Grid--3on1 > .Grid-cell--1,
.v2-Grid--3on1 > .Grid-cell--2,
.v2-Grid--3on1 > .Grid-cell--3 {
    width: 33.333%;
}

.v2-Grid--1to3 > .Grid-cell--1,
.v2-Grid--3to1 > .Grid-cell--2,
.v2-Grid--4col > .Grid-cell {
    width: 25%;
}

/**
 * Fit and Fill
 */

.v2-Grid--fitToFill > .Grid-cell--1 {
    display: block;
    float: left;
    width: auto;
}

.v2-Grid--fitToFill > .Grid-cell--2 {
    display: block;
    overflow: hidden;
    width: auto;
}

/* Contain floats */

.v2-Grid--fitToFill:after {
    display: table;
    content: " ";
    clear: both;
}