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<!DOCTYPE html>
<title>Box Shadow Border Radius (Inset)</title>
<link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact">
<link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#shadow-shape">
<link rel="match" href="box-shadow-radius-001-ref.html">
<style>
body > div {
/* Isolate tests from each other */
position: relative;
width: 100px;
height: 100px;
float: left;
}
div > div {
position: absolute;
box-sizing: border-box;
/* opacity: 0.7; /* uncomment this line for debugging */
}
.floor > .test {
color: silver;
}
.trap > .test {
color: red;
}
.test {
width: 60px;
height: 60px;
top: 20px;
left: 20px;
}
.floor > .ref {
border: 8px red;
border-style: solid none none solid;
top: 21px;
left: 21px;
width: 59px;
height: 59px;
}
.trap > .ref {
border: 31px silver;
border-style: solid none none solid;
width: 81px;
height: 81px;
}
/* Keep tests consistent by offset - spread = 10
Trap radius = 32px + shadow radius (round up)
Floor radius = 8px + shadow radius (round down) */
.once > .test {
border-top-left-radius: 10px;
box-shadow: 20px 20px 0 -10px inset;
/* shadow radius = 20px */
}
.once.floor > .ref {
border-top-left-radius: 28px;
}
.once.trap > .ref {
border-top-left-radius: 52px;
}
.twice > .test {
border-top-left-radius: 10px;
box-shadow: 15px 15px 0 -5px inset;
/* shadow radius = 15 */
}
.twice.floor > .ref {
border-top-left-radius: 23px;
}
.twice.trap > .ref {
border-top-left-radius: 47px;
}
.half > .test {
border-top-left-radius: 8px;
box-shadow: 26px 26px 0 -16px inset;
/* shadow radius = 21px */
}
.half.floor > .ref {
border-top-left-radius: 29px;
}
.half.trap > .ref {
border-top-left-radius: 53px;
}
.fourth > .test {
border-top-left-radius: 5px;
box-shadow: 30px 30px 0 -20px inset;
/* shadow radius = 14.45 */
}
.fourth.floor > .ref {
border-top-left-radius: 22px;
}
.fourth.trap > .ref {
border-top-left-radius: 47px;
}
.eighth > .test {
border-top-left-radius: 2px;
box-shadow: 26px 26px 0 -16px inset;
/* shadow radius = 5.28 */
}
.eighth.floor > .ref {
border-top-left-radius: 12px;
}
.eighth.trap > .ref {
border-top-left-radius: 38px;
}
</style>
<p>Test passes if there is no red.
<div class="once floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="once trap">
<div class="test"></div>
<div class="ref"></div>
</div>
<div class="twice floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="twice trap">
<div class="test"></div>
<div class="ref"></div>
</div>
<div class="half floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="half trap">
<div class="test"></div>
<div class="ref"></div>
</div>
<div class="fourth floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="fourth trap">
<div class="test"></div>
<div class="ref"></div>
</div>
<div class="eighth floor">
<div class="ref"></div>
<div class="test"></div>
</div>
<div class="eighth trap">
<div class="test"></div>
<div class="ref"></div>
</div>
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