CSS3 3D Buttons

default.css

/* Basic CSS Styling */
ul { list-style: none; }
          
a.button {
    display: block;
    float: left;
    position: relative;
    height: 25px;
    width: 80px;
    margin: 0 10px 18px 0;
     
    text-decoration: none;
    font: 12px "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: bold;
    line-height: 25px;
    text-align: center;
}

/* GRAY */
.gray,
.gray:hover {
    color: #555;
    border-bottom: 4px solid #b2b1b1;
    background: #eee;
}
 
.gray:hover { background: #e2e2e2; }

/* Double Borders */
a.button {
    display: block;
    float: left;
    position: relative;
    height: 25px;
    width: 80px;
    margin: 0 10px 18px 0;
     
    text-decoration: none;
    font: 12px "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: bold;
    line-height: 25px;
    text-align: center;
}
 
a.button:before,
a.button:after {
    content: '';
    position: absolute;
    left: -1px;
    height: 25px;
    width: 80px;
    bottom: -1px;
}
 
a.button:before { 
    height: 23px;
    bottom: -4px;
    border-top: 0;
}

/* GRAY */
.gray,
.gray:hover {
    color: #555;
    border-bottom: 4px solid #b2b1b1;
    background: #eee;
}
 
.gray:before,
.gray:after {
    border: 1px solid #cbcbcb;
    border-bottom: 1px solid #a5a5a5;
}
 
.gray:hover { background: #e2e2e2; }

/* CSS3 Magic */
a.button {
    display: block;
    float: left;
    position: relative;
    height: 25px;
    width: 80px;
    margin: 0 10px 18px 0;
     
    text-decoration: none;
    font: 12px "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: bold;
    line-height: 25px;
    text-align: center;
     
    -webkit-border-radius: 3px; 
    -moz-border-radius: 3px;
    border-radius: 3px;
}

a.button:before,
a.button:after {
    content: '';
    position: absolute;
    left: -1px;
    height: 25px;
    width: 80px;
    bottom: -1px;
     
    -webkit-border-radius: 3px; 
    -moz-border-radius: 3px;
    border-radius: 3px;
}
 
a.button:before { 
    height: 23px;
    bottom: -4px;
    border-top: 0;
     
    -webkit-border-radius: 0 0 3px 3px; 
    -moz-border-radius: 0 0 3px 3px;
    border-radius: 0 0 3px 3px;
     
    -webkit-box-shadow: 0 1px 1px 0px #bfbfbf;
    -moz-box-shadow: 0 1px 1px 0px #bfbfbf;
    box-shadow: 0 1px 1px 0px #bfbfbf;
}

/* GRAY */
a.gray,
a.gray:hover,
a.gray:visited {
    color: #555;
    border-bottom: 4px solid #b2b1b1;
    text-shadow: 0px 1px 0px #fafafa;
     
    background: #eee;
    background: -webkit-gradient(linear, left top, left bottom, from(#eee), to(#e2e2e2));
    background: -moz-linear-gradient(top,  #eee,  #e2e2e2);
     
    box-shadow: inset 1px 1px 0 #f5f5f5;
}
 
.gray:before,
.gray:after {
    border: 1px solid #cbcbcb;
    border-bottom: 1px solid #a5a5a5;
}
 
.gray:hover {
    background: #e2e2e2;
    background: -webkit-gradient(linear, left top, left bottom, from(#e2e2e2), to(#eee));
    background: -moz-linear-gradient(top,  #e2e2e2,  #eee);
}

/* ACTIVE STATE */
a.button:active {
    border: none;
    bottom: -4px;
    margin-bottom: 22px;
     
    -webkit-box-shadow: 0 1px 1px #fff;
    -moz-box-shadow:  0 1px 1px #fff;
    box-shadow:  1px 1px 0 #fff, inset 0 1px 1px rgba(0, 0, 0, 0.3);
}
 
a.button:active:before,
a.button:active:after {
    border: none;   
     
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
    box-shadow: none;
}

/* Older Browsers */
/* MODERNIZR FALLBACK */
.no-cssgradients a.button, .no-cssgradients a.button:visited,
.no-borderradius a.button, .no-borderradius a.button:visited,
.no-generatedcontent a.button, .no-generatedcontent a.button:visited {
    background: url(images/sprite.png) no-repeat 0 0px;
    height: 32px;
    width: 82px;
}
 
.no-cssgradients a.button:hover,
.no-borderradius a.button:hover,
.no-generatedcontent a.button:hover {
    background: url(images/sprite.png) no-repeat 0 -32px;
}
 
.no-cssgradients a.button:active,
.no-borderradius a.button:active,
.no-generatedcontent a.button:active {
    background: url(images/sprite.png) no-repeat 0 -64px;
    bottom: 0;
    line-height: 35px;
}
 
.no-cssgradients a.gray,
.no-cssgradients a.gray:visited,
.no-cssgradients a.gray:hover { background-position-x: 0; }
 
.no-cssgradients a.pink,
.no-cssgradients a.pink:visited,
.no-cssgradients a.pink:hover { background-position-x: -82px; }
 
.no-cssgradients a.blue,
.no-cssgradients a.blue:visited,
.no-cssgradients a.blue:hover { background-position-x: -164px; }
 
.no-cssgradients a.green,,
.no-cssgradients a.green:visited,
.no-cssgradients a.green:hover { background-position-x: -246px; }
 
.no-cssgradients a.turquoise,
.no-cssgradients a.turquoise:visited,
.no-cssgradients a.turquoise:hover { background-position-x: -328px; }
 
.no-cssgradients a.black,
.no-cssgradients a.black:visited,
.no-cssgradients a.black:hover { background-position-x: -410px; }
 
.no-cssgradients a.darkgray,
.no-cssgradients a.darkgray:visited,
.no-cssgradients a.darkgray:hover { background-position-x: -492px; }
 
.no-cssgradients a.yellow,
.no-cssgradients a.yellow:visited,
.no-cssgradients a.yellow:hover { background-position-x: -574px; }
 
.no-cssgradients a.purple,
.no-cssgradients a.purple:visited,
.no-cssgradients a.purple:hover { background-position-x: -656px; }
 
.no-cssgradients a.darkblue,
.no-cssgradients a.darkblue:visited,
.no-cssgradients a.darkblue:hover { background-position-x: -738px; }
 
.no-cssgradients a.button, .no-cssgradients a.button:visited, .no-cssgradients a.button:hover, .no-cssgradients a.button:before, .no-cssgradients a.button:after,
.no-borderradius a.button, .no-borderradius a.button:visited, .no-borderradius a.button:hover, .no-borderradius a.button:before, .no-borderradius a.button:after,
.no-generatedcontent a.button, .no-generatedcontent a.button:visited, .no-generatedcontent a.button:hover, .no-generatedcontent a.button:before, .no-generatedcontent a.button:after {
    border: 0;
}

index.html

<ul class="buttons">
    <li><a href="#" class="button gray">Download</a></li>
    <li><a href="#" class="button pink">Download</a></li>
    <li><a href="#" class="button blue">Download</a></li>
    <li><a href="#" class="button green">Download</a></li>
    <li><a href="#" class="button turquoise">Download</a></li>
    <li><a href="#" class="button black">Download</a></li>
    <li><a href="#" class="button darkgray">Download</a></li>
    <li><a href="#" class="button yellow">Download</a></li>
    <li><a href="#" class="button purple">Download</a></li>
    <li><a href="#" class="button darkblue">Download</a></li>
</ul>