Шаблоны CSS3 для кнопок

<a href="/" class="button">Кнопка</a>

<button class="button">Кнопка</button>

.button{
  display: inline-block;
  *display: inline;
  zoom: 1;
  padding: 6px 20px;
  margin: 0;
  cursor: pointer;
  border: 1px solid #bbb;
  overflow: visible;
  font: bold 13px arial, helvetica, sans-serif;
  text-decoration: none;
  white-space: nowrap;
  color: #555;
  background-color: #ddd;
  background-image: linear-gradient(top, rgba(255,255,255,1),
                                         rgba(255,255,255,0)),
                    url(data:image/png;base64,iVBORw0KGg[...]QmCC); 
  transition: background-color .2s ease-out;
  background-clip: padding-box; /* Fix bleeding */
  border-radius: 3px;
  box-shadow: 0 1px 0 rgba(0, 0, 0, .3),
              0 2px 2px -1px rgba(0, 0, 0, .5),
              0 1px 0 rgba(255, 255, 255, .3) inset;
  text-shadow: 0 1px 0 rgba(255,255,255, .9);  
}

.button:hover{
  background-color: #eee;
  color: #555;
}

.button:active{
  background: #e9e9e9;
  position: relative;
  top: 1px;
  text-shadow: none;
  box-shadow: 0 1px 1px rgba(0, 0, 0, .3) inset;
}

<button class="small button">Кнопка</button>

<button class="large button">Кнопка</button>

/* Стили маленьких кнопок */

.button.small{
  padding: 4px 12px;
}

/* Стили больших кнопок */

.button.large{
  padding: 12px 30px;
  text-transform: uppercase;
}

.button.large:active{
  top: 2px;
}

<button class="button">Кнопка</button>
<button class="color red button">Кнопка</button>
<button class="color green button">Кнопка</button>
<button class="color blue button">Кнопка</button>

.button.color{
  color: #fff;
  text-shadow: 0 1px 0 rgba(0,0,0,.2);
  background-image: linear-gradient(top, rgba(255,255,255,.3), 
  					 rgba(255,255,255,0)),
                    url(data:image/png;base64,iVBORw0KGg[...]QmCC);
}

/* */

.button.green{
  background-color: #57a957;
  border-color: #57a957;
}

.button.green:hover{
  background-color: #62c462;
}

.button.green:active{
  background: #57a957;
}

/* */

.button.red{
  background-color: #c43c35;
  border-color: #c43c35;
}

.button.red:hover{
  background-color: #ee5f5b;
}

.button.red:active{
  background: #c43c35;
}

/* */

.button.blue{
  background-color: #269CE9;
  border-color: #269CE9;
}

.button.blue:hover{
  background-color: #70B9E8;
}

.button.blue:active{
  background: #269CE9;
}

<button class="button" disabled>Кнопка</button>
<button class="color red button" disabled>Кнопка</button>
<button class="color green button" disabled>Кнопка</button>
<button class="color blue button" disabled>Кнопка</button>

.button[disabled], .button[disabled]:hover, .button[disabled]:active{
  border-color: #eaeaea;
  background: #fafafa;
  cursor: default;
  position: static;
  color: #999;
  /* Следует избегать использования директивы !important, но в данном случае она необходима :) */
  box-shadow: none !important;
  text-shadow: none !important;
}

.green[disabled], .green[disabled]:hover, .green[disabled]:active{
  border-color: #57A957;
  background: #57A957;
  color: #D2FFD2;
}

.red[disabled], .red[disabled]:hover, .red[disabled]:active{
  border-color: #C43C35;
  background: #C43C35;
  color: #FFD3D3;
}

.blue[disabled], .blue[disabled]:hover, .blue[disabled]:active{
  border-color: #269CE9;
  background: #269CE9;
  color: #93D5FF;
}

<ul class="button-group">
	<li><button class="button">Кнопка</button></li>
	<li><button class="button">Кнопка</button></li>
	<li><button class="button">Кнопка</button></li>
	<li><button class="button">Кнопка</button></li>
</ul>

/* Группировка кнопок */

.button-group,
.button-group li{
  display: inline-block;
  *display: inline;
  zoom: 1;
}

.button-group{
  font-size: 0; /* Зазаор для встроенного элемента */
  margin: 0;
  padding: 0;
  background: rgba(0, 0, 0, .04);
  border-bottom: 1px solid rgba(0, 0, 0, .07);
  padding: 7px;
  -moz-border-radius: 7px;
  -webkit-border-radius: 7px;
  border-radius: 7px; 
}

.button-group li{
  margin-right: -1px; /* Перекрытие каждой правой рамки */
}

.button-group .button{
  font-size: 13px; /* Устанавливаем размер шрифта */
  -moz-border-radius: 0;
  -webkit-border-radius: 0;
  border-radius: 0; 
}

.button-group .button:active{
  -moz-box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, 5px 0 5px -3px rgba(0, 0, 0, .2) inset, -5px 0 5px -3px rgba(0, 0, 0, .2) inset;
  -webkit-box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, 5px 0 5px -3px rgba(0, 0, 0, .2) inset, -5px 0 5px -3px rgba(0, 0, 0, .2) inset;
  box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, 5px 0 5px -3px rgba(0, 0, 0, .2) inset, -5px 0 5px -3px rgba(0, 0, 0, .2) inset;   
}

.button-group li:first-child .button{
  -moz-border-radius: 3px 0 0 3px;
  -webkit-border-radius: 3px 0 0 3px;
  border-radius: 3px 0 0 3px;
}

.button-group li:first-child .button:active{
  -moz-box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, -5px 0 5px -3px rgba(0, 0, 0, .2) inset;
  -webkit-box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, -5px 0 5px -3px rgba(0, 0, 0, .2) inset;
  box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, -5px 0 5px -3px rgba(0, 0, 0, .2) inset;
}

.button-group li:last-child .button{
  -moz-border-radius: 0 3px 3px 0;
  -webkit-border-radius: 0 3px 3px 0;
  border-radius: 0 3px 3px 0;
}

.button-group li:last-child .button:active{
  -moz-box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, 5px 0 5px -3px rgba(0, 0, 0, .2) inset;
  -webkit-box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, 5px 0 5px -3px rgba(0, 0, 0, .2) inset;
  box-shadow: 0 0 1px rgba(0, 0, 0, .2) inset, 5px 0 5px -3px rgba(0, 0, 0, .2) inset;
}