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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
.container {
display: grid;
grid-template-columns: repeat(3, 50px);
column-gap: 10px;
width: min-content;
height: 135px;
border: solid blue;
}
.col {
position: relative;
}
.item {
position: absolute;
width: 50px;
box-sizing: border-box;
}
</style>
</head>
<body>
<p>Test that grid-lanes items with fill-reverse and track-reverse placement are correctly positioned
within an indefinite-size container.</p>
<div class="container">
<div class="col">
<div class="item" style="background: gold; top: 0px; height: 30px;">10</div>
<div class="item" style="background: lightskyblue; top: 30px; height: 35px;">6</div>
<div class="item" style="background: lavender; top: 85px; height: 20px;">5</div>
<div class="item" style="background: lightgreen; top: 115px; height: 20px;">3</div>
</div>
<div class="col">
<div class="item" style="background: tomato; top: -5px; height: 15px;">11</div>
<div class="item" style="background: lightpink; top: 20px; height: 40px;">8</div>
<div class="item" style="background: lightpink; top: 70px; width: 110px; height: 25px;">4</div>
<div class="item" style="background: orchid; top: 105px; height: 15px; z-index: 1;">12</div>
<div class="item" style="background: lightskyblue; top: 105px; height: 30px;">2</div>
</div>
<div class="col">
<div class="item" style="background: coral; top: 0px; height: 30px;">9</div>
<div class="item" style="background: lightgreen; top: 40px; height: 20px;">7</div>
<div class="item" style="background: lavender; top: 115px; height: 20px;">1</div>
</div>
</div>
</body>
</html>