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@paulfarning
Created October 4, 2010 06:58
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CSS3 rolled corners
.section {
border: 4px solid #fff;
margin: 100px;
padding: 10px 20px;
overflow: hidden;
width: 310px;
background-image: -moz-linear-gradient(top, #f6f2ec, #e2dbce); /* FF3.6 */
background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, #f6f2ec),color-stop(1, #e2dbce)); /* Saf4+, Chrome */
filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#f6f2ec', EndColorStr='#e2dbce'); /* IE6,IE7 */
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorStr='#f6f2ec', EndColorStr='#e2dbce')"; /* IE8 */
-moz-box-shadow: 0 0 2px rgba(0, 0, 0, 0.35), 0 85px 180px 0 #fff, 0 12px 8px -5px rgba(0, 0, 0, 0.85); /* FF3.5+ */
-webkit-box-shadow: 0 0 2px rgba(0, 0, 0, 0.35), 0 85px 810px -68px #fff, 0 12px 8px -5px rgba(0, 0, 0, 0.65); /* Saf3.0+, Chrome */
box-shadow: 0 0 2px rgba(0, 0, 0, 0.35), 0 85px 180px 0 #fff, 0 12px 8px -5px rgba(0, 0, 0, 0.85); /* Opera 10.5, IE 9.0 */
}
.reveal {
-moz-box-shadow: 0 0 2px rgba(0, 0, 0, 0.35), 0 85px 180px 0 #f90, 0 12px 8px -5px rgba(0, 0, 0, 0.85); /* FF3.5+ */
-webkit-box-shadow: 0 0 2px rgba(0, 0, 0, 0.35), 0 85px 810px -68px #f90, 0 12px 8px -5px rgba(0, 0, 0, 0.65); /* Saf3.0+, Chrome */
box-shadow: 0 0 2px rgba(0, 0, 0, 0.35), 0 85px 180px 0 #f90, 0 12px 8px -5px rgba(0, 0, 0, 0.85); /* Opera 10.5, IE 9.0 */
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>CSS3 Rolled corners</title>
</head>
<body>
<div class="section">
<p>Matching mask shadow color blends to solid background.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
</div>
<div class="section reveal">
<p>Contrasting mask shadow color reveals shadow layering.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
</div>
</body>
</html>
@paulfarning
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Rolled corners using box-shadow property. Requires a solid background color and overflow:hidden if nearby elements to prevent bleed. Reveal demos contrasting shadow mask to show how layers interact to create the rolled corners.

Example: http://waytoocrowded.com/extras/css3-rolled-corners/

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