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<!DOCTYPE HTML>
<title>Details and summary and display property (subgrid)</title>
<style>
.container {
display: grid;
grid: 30px 75px 45px / 80px 125px 90px;
}
.before {
background: aqua;
grid-area: 1 / 3;
}
.after {
background: yellow;
grid-area: 3 / 1;
}
.summary {
background: fuchsia;
grid-area: 2 / 2;
}
.contents {
background: silver;
grid-area: 3 / 3;
}
</style>
<div class="container">
<div class="before">before</div>
<div class="summary">summary</div>
<div class="contents">contents</div>
<div class="after">after</div>
</div>