<!DOCTYPE html>
<title>Tests resolving anchor-name conflicts in multicol</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#propdef-anchor-name">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#anchor-pos">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#anchor-size">
<link rel="author" href="mailto:kojii@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script src="support/test-common.js"></script>
<style>
.cb {
  transform: translate(0);  /* Make it a containing block. */
  border-width: 5px 6px 7px 8px;
  border-style: solid;
  padding: 5px 6px 7px 8px;
}
.columns {
  column-count: 5;
  column-fill: auto;
  column-gap: 10px;
  column-width: 100px;
  width: 540px;
  height: 100px;
}
.spacer {
  height: 10px;
  background: pink;
}
.anchor1 {
  anchor-name: --a1;
  margin-left: 10px;
  width: 40px;
  height: 90px;
  background: blue;
}
.target {
  position: absolute;
}
.target1 {
  left: anchor(--a1 left);
  top: anchor(--a1 top);
  width: anchor-size(--a1 width);
  height: anchor-size(--a1 height);
  background: lime;
  opacity: .3;
}
.target1-rb {
  right: anchor(--a1 right);
  bottom: anchor(--a1 bottom);
  width: 10px;
  height: 10px;
  background: purple;
}
</style>
<body onload="checkLayoutForAnchorPos('.target')">
  <p>The green box should be a union of two blue boxes in the right,
    and the purple box should be at the right-bottom of the green box.
  </p>
  <div class="spacer" style="height: 10px"></div>
  <div class="columns">
    <div class="spacer" style="height: 70px"></div>
    <div class="cb">
      <!-- This spacer fills up to the middle of the 2nd column. -->
      <div class="spacer" style="height: 60px"></div>
      <div class="anchor1"></div>
      <div class="cb">
        <div class="spacer" style="height: 120px"></div>
        <div class="anchor1" style="width: 20px"></div>

        <div class="target target1"
             data-offset-x=18 data-offset-y=65
             data-expected-width=130 data-expected-height=100></div>
        <div class="target target1-rb"
              data-offset-x=138 data-offset-y=155></div>
      </div>

      <div class="target target1"
            data-offset-x=34 data-offset-y=225
            data-expected-width=130 data-expected-height=100></div>
      <div class="target target1-rb"
            data-offset-x=154 data-offset-y=315></div>
    </div>
</body>
