<!DOCTYPE html>
<link href="resources/grid.css" rel="stylesheet">
<link href="resources/grid-alignment.css" rel="stylesheet">
<style>
body { margin: 0; }
.block {
   background: grey;
   float: left;
   margin: 5px;
   text-orientation: sideways;
}
.block > :nth-child(1) { font-size:24px; }
.block > :nth-child(2) { font-size:32px; }
.block > :nth-child(3) { font-size:48px; }
.block > :nth-child(4) { font-size:64px; }
.item {
   border-width: 2px 5px 3px 4px;
   border-style: solid;
   padding: 6px 3px 7px 8px;
   margin: 10px 6px 4px 12px;
}
.extraTopPadding { padding-top: 30px; }
.extraBottomPadding { padding-bottom: 30px; }
.extraRightPadding { padding-right: 30px; }
.grid { grid: 65px 75px 100px 125px / 100px; }
</style>

<p>4x1 with parallel items. Items orthogonal to the baseline-axis will use a synthesized baseline (border-box 'under' edge).<br>No item shares any row-like Baseline Context. All items share 'first-column' Baseline Context.<br>The 'justify-self' property (orthogonal to the shared context) aligns all items along the baseline-axis using the column-like baseline.</p>
<div class="block grid contentStart justifyItemsBaseline alignItemsStart"><div class="item">A</div><div class="item">A</div><div class="item">A</div><div class="item">A</div></div>
<div class="block grid contentStart justifyItemsBaseline alignItemsStart"><div class="item extraRightPadding">A</div><div class="item">A</div><div class="item">A</div><div class="item">A</div></div>
<div class="block grid verticalLR contentStart justifyItemsBaseline alignItemsStart"><div class="item">A</div><div class="item">A</div><div class="item">A</div><div class="item">A</div></div>
<div class="block grid verticalLR contentStart justifyItemsBaseline alignItemsStart"><div class="item extraTopPadding">A</div><div class="item">A</div><div class="item">A</div><div class="item">A</div></div>
<div class="block grid verticalRL contentStart justifyItemsBaseline alignItemsStart"><div class="item">A</div><div class="item">A</div><div class="item">A</div><div class="item">A</div></div>
<div class="block grid verticalRL contentStart justifyItemsBaseline alignItemsStart"><div class="item extraBottomPadding">A</div><div class="item">A</div><div class="item">A</div><div class="item">A</div></div>