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CSS3 envelope shape

CSS3 envelope shape

Problem

As you might have guessed this image is part of a mail envelope shape which I would like to create with CSS3 if possible. I've made the other parts but this one's tricky. The shape needs both a triangular cut on both sides and rounded corners (presumably border-radius-bottom-left/border-radius-bottom-right). It also has to have the ability to cast a small shadow.

This is what I've done so far -

#envelope {
background: #fff;
}

.closed {
width: 860px;
height: 0; 
border-top: 80px solid fff;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
-moz-box-shadow: 0 1px 5px #ccc;
-webkit-box-shadow: 0 1px 5px #ccc;
box-shadow: 0 1px 5px #ccc;
}

jsFiddle - http://jsfiddle.net/hsYUy/

Problem courtesy of: Staffan Estberg

Solution

My attempt, I only used the shadow and rotate properties for chrome, but you can add it for other browsers,

http://jsfiddle.net/hsYUy/7/

body {
  background: #f2f2f2;
}
#content {
  width: 460px;
  margin: 0 auto;
  background: #fff;
  height: 400px;
  /* for demo */
  -moz-box-shadow: 0 1px 5px #ccc;
  -webkit-box-shadow: 0 1px 5px #ccc;
  box-shadow: 0 1px 5px #ccc;
  border-bottom-left-radius: 15px;
  -moz-border-radius-bottomleft: 15px;
  -webkit-border-bottom-left-radius: 15px;
  border-bottom-right-radius: 15px;
  -moz-border-radius-bottomright: 15px;
  -webkit-border-bottom-right-radius: 15px;
  z-index: 0;
}
.closed {
  z-index: 1;
  width: 460px;
  overflow: hidden;
  margin: 0 auto;
  height: 80px;
  margin-bottom: -5px;
}
.closed .mid {
  /*background: #fff;*/
  width: 360px;
  margin: 0 auto;
  margin-top: -70px;
  height: 80px;
  background-color: #fff;
  -moz-box-shadow: 0 1px 5px #ccc;
  -webkit-box-shadow: 0 1px 5px #ccc;
  box-shadow: 0 1px 5px #ccc;
  -webkit-border-radius: 12px;
}
.left,
.right {
  display: none;
}
.closed .right {
  display: block;
  width: 0;
  height: 100px;
  border-left: 60px solid #fff;
  border-right: 1px solid #ccc;
  margin-left: 384px;
  -webkit-transform: rotate(39deg);
  margin-top: -34px;
  box-shadow: 1px -1px 1px #ccc;
}
.closed .left {
  display: block;
  width: 0;
  height: 100px;
  border-right: 60px solid #fff;
  border-left: 1px solid #ccc;
  margin-left: 16px;
  -webkit-transform: rotate(-39deg);
  margin-top: -100px;
  box-shadow: -1px -1px 1px #ccc;
}
Solution courtesy of: Andrew

Discussion

View additional discussion.



This post first appeared on CSS3 Recipes - The Solution To All Your Style Problems, please read the originial post: here

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CSS3 envelope shape

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