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<!DOCTYPE html>
<title>Percentage inset/margin/padding in position-area</title>
<style>
.container {
width: 100px; height: 100px;
border: solid gray;
margin: 6px;
position: relative;
float: left;
}
.anchor {
position: absolute;
background: silver;
inset: 20px 20px 40px 20px;
}
.anchored {
border: solid blue 2px;
position: absolute;
place-self: stretch;
inset: 60px 0 0 20px; /* occupy the bottom center-right area */
background: content-box aqua;
}
/* insets (top / left margins here) compute against their own axis */
/* margins (bottom / right margins here) and padding compute against inline axis */
.horizontal { /* margin/padding computes against horizontal */
margin: 8px 4px 4px 16px;
padding: 8px;
}
.vertical { /* margin/padding computes against vertical */
margin: 8px 2px 2px 16px;
padding: 4px;
}
</style>
<div class=container>
<div class="anchor"></div>
<div class="anchored horizontal"></div>
</div>
<div class=container>
<div class="anchor"></div>
<div class="anchored horizontal"></div>
</div>
<div class=container>
<div class="anchor"></div>
<div class="anchored vertical"></div>
</div>
<div class=container>
<div class="anchor"></div>
<div class="anchored vertical"></div>
</div>
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