ディテールの装飾に使える4つのピュアCSSテクニックス:4 Uber Cool Css Techniques For Linksのご紹介です。
via.http://cssglobe.com/post/1614/4-uber-cool-css-techniques-for-links

Pure Css Tooltip

HTML

<a href="#">Title <span>Tooltip</span></a> 

CSS

a{
	z-index:10;
	}
a:hover{
	position:relative;
	z-index:100;
	}			
a span{
	display:none;
	}
a:hover span{
	display:block;
	position:absolute;
	float:left;
	white-space:nowrap;
	top:-2.2em;
	left:.5em;
	background:#fffcd1;
	border:1px solid #444;
	color:#444;
	padding:1px 5px;
	z-index:10;			
	}

Pure Css Image Gallery

HTML

<li>
	<a href="#">
		<img src="images/02_1s.jpg" alt="gallery thumbnail" />
		<span><img src="images/02_1.jpg" alt="gallery image" /></span>
	</a>
</li>

CSS

ul#gallery, ul#gallery li{
	margin:0;
	padding:0;
	list-style:none;
	}
ul#gallery{
	width:400px;
	height:375px;
	position:relative;
	background:#e1e1e1 url(images/bg_preview.gif) no-repeat 50% 40%;
	}			
ul#gallery li{
	float:left;
	display:inline;
	margin-top:300px;
	}								
ul#gallery a span{
	display:none;
	}
ul#gallery a:hover{
	background:none;
	z-index:100;
	}	
ul#gallery a:hover span{
	position:absolute;
	width:400px;
	height:300px;
	float:left;
	top:0;
	left:0;
	display:block;
	}

Pure Css Image Resizer

HTML

<li>
	<a href="#">
		<em><img src="images/02_1s.jpg" alt="gallery thumbnail" /></em>
		<span><img src="images/02_1m.jpg" alt="gallery image" /></span>
	</a>
</li>

CSS

ul#gallery, ul#gallery li{
	margin:0;
	padding:0;
	list-style:none;
	}
ul#gallery{
	margin:2em 0;
	}			
ul#gallery li{
	float:left;
	display:inline;
	margin-right:5px;
	}								
ul#gallery a{
	float:left;
	display:inline;
	position:relative;
	}	
ul#gallery a:hover{
	background:none;
	z-index:100;
	}	
ul#gallery a span{
	display:none;
	}
ul#gallery a:hover span{
	float:left;
	display:block;
	cursor:pointer;
	}
ul#gallery a:hover em{
	display:none;
	}				
ul#gallery a img{
	border:1px solid #999;
	padding:2px;
	background:#fff;
	}	
ul#gallery a:hover img{
	border:1px solid #000;
	}

3D Button Effect

HTML

<a href="#" class="button"><span>Roll over here</span></a>

CSS

a.button{
	float:left;
	font-size:110%;
	font-weight:bold;				
	border-top:1px solid #999;
	border-left:1px solid #999;
	border-right:1px solid #333;
	border-bottom:1px solid #333;
	color:#333;		
	width:auto;
	}	
a.button:hover{	
	border-top:1px solid #333;
	border-left:1px solid #333;
	border-right:1px solid #999;
	border-bottom:1px solid #999;	
	color:#333;					
	}	
a.button span{
	background:#d4d0c8 url(images/bg_btn.gif) repeat-x;			
	float:left;
	line-height:24px;
	height:24px;	
	padding:0 10px;							
	border-right:1px solid #777;
	border-bottom:1px solid #777;					
	}		
a.button:hover span{
	border:none;						
	border-top:1px solid #777;
	border-left:1px solid #777;		
	background:#d4d0c8 url(images/bg_btnOver.gif) repeat-x;	
	cursor:pointer;	
	}

サンプルファイルのDLは下記URLから出来ます。