CSS Z-Index Paradox Flower

CSS z-index paradox flower

Here's my attempt: http://jsfiddle.net/Kx2k5/1/

(successfully tested on Fx27, Ch33, IE9, Sf5.1.10 and Op19)

---

CSS

.item {
   /* include borders on width and height */  
   -webkit-box-sizing : border-box;
   -moz-box-sizing    : border-box;
   box-sizing         : border-box;
   ...
}

.i1:after {
   content: "";

   /* overlap a circle over circle #1 */
   position : absolute;
   z-index  : 1;
   top      : 0;
   left     : 0;
   height   : 100%;
   width    : 100%;

   /* inherit border, background and border-radius */
   background    : inherit;
   border-bottom : inherit;
   border-radius : inherit;

   /* only show the bottom area of the pseudoelement */
   clip          : rect(35px 50px 50px 0);
}

Basically I've overlapped an :after pseudoelement over the first circle (with some properties inherited), then I've clipped it with clip() property, so I only make its bottom section visible (where circle #1 overlaps the circle #5).

For the CSS properties I've used here, this example should be working even on IE8 (box-sizing, clip(), inherit, and pseudoelements are supported there)

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Screenshot of resulting effect

Paradoxical effect for HTML divs using CSS

WORKING DEMO :before

senario:

Using only one pseudo-element :before you just need to set border-top and border-right then give it an absolute position on the bottom left of div2

With the same HTML code as OP all you need is a Pseudo-element :before or :after combine witn z-index. To make it easy i put numbers in your HTML.

Note: you habe to set position relative to the element with the pseudo, the set the top border and the right border you can skeep that using box-shadow too see WORKING DEMO WITH BOX-SHADOW.

HTML

<div class="box1">1
</div>
<div class="box2">2
</div>
<div class="box3">3
</div>
<div class="box4">4
</div> 

CSS

div{
height:100px;
width:100px; 
border:solid 1px;
}

.box1{
position:relative;
left:500px;
background-color:#00d8ff;
z-index:3;
}

.box2{
position:relative;
left:570px;
top:-30px;
background-color:#f6ff00;
z-index: 3;
}
.box2:before{
content: '';
position: absolute;
bottom: -2px;
left: -2px;
width: 32px;
height: 30px;
border-top: 1px solid black;
border-right: 1px solid black;
z-index: 14;
background-color: #ff69fa;
}
.box3{
position:relative;
left:500px;
top:-60px;
background-color:#ff69fa;
z-index:1;    
}

.box4{
position:relative;
left:430px;
top:-230px;
background-color:#24ff00;
z-index:2;
}

WORKING DEMO WITH BOX-SHADOW

Here you just need to change the width and height of .box2.

senario:

you choose one div in my case div2 you don't set the background-color then reset the the borders border:none; .

Since you have set div width, height and position relative you can now set :before and 'after' width a 100% width and 50% height, one on the top and the other on the bottom, then for :before set border-top and for :after set border-bottom.

Now set for both of then border-left and border-right.

div{
height:100px;
width:100px; 
border:solid 1px;
position:relative;
}

.box1{
left:500px;
background-color:#00d8ff;
z-index:3;
}

.box2{
left:570px;
top:-30px;
border:none;
}
.box2:before,.box2:after{
content: '';
position: absolute;   
background-color:#f6ff00;
width: 100%;
height: 50%;
left: 0;
border-left:1px solid black;
border-right:1px solid black;
}
.box2:before{
top: 0;
z-index: 3;
border-top:1px solid black;
}
.box2:after{
bottom: 0;
z-index: 0;
border-bottom:1px solid black;
}
.box3{
left:500px;
top:-60px;
background-color:#ff69fa;
z-index:1;    
}

.box4{
left:430px;
top:-230px;
background-color:#24ff00;
z-index:2;
}

WORKING DEMO :BEFORE :AFTER FLEXIBLE

Absolute positioning messed up in Safari

HTML

<img class="img-circle webdesign " src="assets/img/webdesign_.png">
<img class="img-circle" src="assets/img/webdesign_hover.png" style='display:none;'>

JS

$('.img-circle').mouseenter(function() {
    $('.img-circle').toggle();
});

CSS

.img-circle {
    position: absolute;
    top: ???;
    left: ???;
}

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