Como posso criar esferas simples usando CSS?

É possível criar uma esfera simples usando CSS? Estou pensando em algo como uma esfera 3D.

Eu não amei as respostas e os comentários já fornecidos; muito código para uma esfera simples em html - css. Você pode simplesmente fazer:

<div class = "sphere">Test</div>

O CSS:

body {
    background: #333;
    }

.sphere {
    width: 200px;
    height: 200px;
    line-height: 200px;
    text-align: center;
    color: #FFF;
    margin: 100px auto;
    /* The magic are those 2 lines: */
    border-radius: 100%;
    box-shadow: inset 0 0 80px #FFF;
    }

Simple JSFiddle DEMO

Então eu queria me desafiar e, portanto, algumas coisas mais complexas. Este é o resultado:

O HTML:

<div class = "sphere a">This</div>
<div class = "sphere b">Is</div>
<div class = "sphere c">A</div>
<div class = "sphere d">Test</div>

O CSS:

body {
    background: #333;
}
.sphere {
    width: 200px;
    height: 200px;
    line-height: 200px;
    text-align: center;
    position: absolute;
    margin: -100px;
    border-radius: 100%;
    box-shadow: inset 0 0 80px #FFF;
    color: #FFF;
}
.a {
    top: 10%;
    left: 20%;
}
.b {
    top: 30%;
    left: 60%;
}
.c {
    top: 60%;
    left: 40%;
}
.d {
    top: 80%;
    left: 70%;
}

DEMO JSFiddle completo

Demo

css

.demo-container {  
 height:300px;  
 overflow:hidden;  
 display:block;  
 position:relative;  
 /* CSS3 Gradient */  
 background: rgb(125,126,125);  
 background: url(data:image/svg+xml;base64,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);  
 background: -moz-radial-gradient(center, ellipse cover,  rgba(125,126,125,1) 0%, rgba(14,14,14,1) 100%);  
 background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,rgba(125,126,125,1)), color-stop(100%,rgba(14,14,14,1)));  
 background: -webkit-radial-gradient(center, ellipse cover,  rgba(125,126,125,1) 0%,rgba(14,14,14,1) 100%);  
 background: -o-radial-gradient(center, ellipse cover,  rgba(125,126,125,1) 0%,rgba(14,14,14,1) 100%);  
 background: -ms-radial-gradient(center, ellipse cover,  rgba(125,126,125,1) 0%,rgba(14,14,14,1) 100%);  
 background: radial-gradient(ellipse at center,  rgba(125,126,125,1) 0%,rgba(14,14,14,1) 100%);  
 filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#7d7e7d', endColorstr='#0e0e0e',GradientType=1 );  
 }  
.bubble1, .bubble2, .bubble3, .bubble4 {  
 position:absolute;  
 display:block;  
 /* CSS3 Box Shadow */  
 box-shadow:0 20px 30px rgba(0, 0, 0, 0.2), inset 0px 10px 30px 5px rgba(255, 255, 255, 1);  
 -webkit-box-shadow:0 20px 30px rgba(0, 0, 0, 0.2), inset 0px 10px 30px 5px rgba(255, 255, 255, 1);  
 -moz-box-shadow:0 20px 30px rgba(0, 0, 0, 0.2), inset 0px 10px 30px 5px rgba(255, 255, 255, 1);  
 /* CSS3 Border Radius */  
 border-radius:50%;  
 -webkit-border-radius:50%;  
 -moz-border-radius:50%;  
 /* CSS3 Transition */  
 -webkit-transition: all .5s ease-in-out;  
 -moz-transition: all .5s ease-in-out;  
 -o-transition: all .5s ease-in-out;  
 transition: all .5s ease-in-out;  
 }  
.bubble1 {  
 width:100px;  
 height:100px;  
 top:20%;  
 left:50%;  
 }   
.bubble2 {  
 width:200px;  
 height:200px;  
 left:20%;  
 top:10%;  
 }  
.bubble3 {  
 width:150px;  
 height:150px;  
 left:50%;  
 top:40%;  
 }  
.bubble4 {  
 width:90px;  
 height:90px;  
 left:70%;  
 top:15%;  
 }  
/* .bubble1:hover {  
 margin-top:30px;  
 width:90px;  
 }  
.bubble2:hover {  
 margin-left:20px;  
 height:190px;  
 }  
.bubble3:hover {  
 margin-top:60px;  
 width:160px;  
 }  
.bubble4:hover {  
 margin-left:50px;  
 height:100px;  
 }  */

/* remove below codes if you don't wish to have the texts "3D Bubbles" */
.demo-text{  
 position:absolute;  
 bottom:20px;  
 right:15px;  
 font-size:36px;  
 color:#666;  
 text-shadow:0 2px 0 #000;  
 }

html

<div class="demo-container">  
 <span class="bubble1"></span>  
 <span class="bubble2"></span>  
 <span class="bubble3"></span>  
 <span class="bubble4"></span>  
 <div class="demo-text">3D Bubbles</div> <!-- remove this div if you don't wish to have the texts "3D Bubbles" --> 
</div> 

Referir