in-inline-start: 10px;
    background-color: green;
}
.negative-line-number {
    width: 50px;
    grid-row: 2;
    grid-column: -3;
    background-color: blue;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<body onload="checkLayout('grid > item')">
    <div id="target">
    <grid>
        <item data-expected-margin-left="0" class="negative-line-number"></item>
        <item data-expe