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<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-gaps-1/">
<link rel="author" title="Javier Contreras" href="mailto:javiercon@microsoft.com">
<style>
body {
margin: 0px;
}
.container {
width: 200px;
height: 270px;
column-count: 3;
column-width: 60px;
column-gap: 10px;
}
.items {
background: rgb(96 139 168 / 0.2);
height: 50px;
width: 60px;
margin: 0px;
writing-mode: vertical-rl;
}
.spanner {
height: 5px;
background: cyan;
column-span: all;
opacity: 0.5;
}
.col-rule-container {
width: 5px;
height: 420px;
position: absolute;
left: 62.5px;
display: flex;
flex-direction: column;
gap: 5px;
}
.col-rule {
background: blue;
height: 50px;
width: 5px;
}
</style>
<div class="col-rule-container" style="top: 55px;">
<div class="col-rule"></div>
<div class="col-rule"></div>
<div class="col-rule"></div>
<div class="col-rule"></div>
</div>
<div class="col-rule-container" style="top: 110px; left: 132.5px">
<div class="col-rule"></div>
<div class="col-rule"></div>
</div>
<div class="container">
<div class="items"></div>
<div class="spanner"></div>
<div class="items"></div>
<div class="items"></div>
<div class="spanner"></div>
<div class="items"></div>
<div class="items"></div>
<div class="items"></div>
<div class="spanner"></div>
<div class="items"></div>
<div class="items"></div>
<div class="items"></div>
<div class="spanner"></div>
<div class="items"></div>
<div class="items"></div>
</div>