CSS3 кнопки в стиле Google Plus

Повторим реализацию кнопок, которые сейчас используются на сервисе Google Plus с помощью CSS3.

HTML

Красные вызываются классом redbtn, зеленые - greenbtn, синие - bluebtn и серые - без дополнительного класса:

    <div class="buttons">
      <button class="action bluebtn"><span class="label">Сохранить</span></button>
      <button class="action redbtn"><span class="label">Загрузить</span></button>
      <button class="action greenbtn"><span class="label">Комментировать</span></button>
      <button class="action"><span class="label">Отменить</span></button>
    </div>

CSS

Стили кнопочек:

/*------------------------------------*
    $WRAPPER
*------------------------------------*/
.buttons {/* Style as you wish (toolbar) */
}
/* The Magnificent CLEARFIX */
.buttons:before, .buttons:after {
    content: "020";
    display: block;
    height: 0;
    visibility: hidden;
}
.buttons:after {
    clear: both;
}
.buttons {
    zoom: 1;
}
/* ------------------------ */
/*------------------------------------*
    $BUTTON
*------------------------------------*/
button {
    text-decoration: none;
    text-shadow: 0 1px 0 #fff;
    font: bold 11px Helvetica, Arial, sans-serif;
    color: #444;
    line-height: 17px;
    height: 18px;
    display: inline-block;
    float: left;
    margin: 5px;
    padding: 5px 6px 4px 6px;
    background: #F3F3F3;
    border: solid 1px #D9D9D9;
    border-radius: 2px;
    -webkit-border-radius: 2px;
    -moz-border-radius: 2px;
 -webkit-transition: border-color .20s;
 -moz-transition: border-color .20s;
 -o-transition: border-color .20s;
 transition: border-color .20s;
    height: 29px !important;
    cursor: pointer;
}
button:hover {
    background: #F4F4F4;
    border-color: #C0C0C0;
    color: #333;
}
button:active {
    border-color: #4D90FE;
    color: #4D90FE;
    -moz-box-shadow:inset 0 0 10px #D4D4D4;
    -webkit-box-shadow:inset 0 0 10px #D4D4D4;
    box-shadow:inset 0 0 10px #D4D4D4;
}
button.bluebtn {
    border: 1px solid #3079ED !important;
    background: #4B8DF8;
    background: -webkit-linear-gradient(top, #4C8FFD, #4787ED);
    background: -moz-linear-gradient(top, #4C8FFD, #4787ED);
    background: -ms-linear-gradient(top, #4C8FFD, #4787ED);
    background: -o-linear-gradient(top, #4C8FFD, #4787ED);
 -webkit-transition: border .20s;
 -moz-transition: border .20s;
 -o-transition: border .20s;
 transition: border .20s;
}
button.bluebtn:hover {
    border: 1px solid #2F5BB7 !important;
    background: #3F83F1;
    background: -webkit-linear-gradient(top, #4D90FE, #357AE8);
    background: -moz-linear-gradient(top, #4D90FE, #357AE8);
    background: -ms-linear-gradient(top, #4D90FE, #357AE8);
    background: -o-linear-gradient(top, #4D90FE, #357AE8);
}
button.greenbtn {
    border: 1px solid #29691D !important;
    background: #3A8E00;
    background: -webkit-linear-gradient(top, #3C9300, #398A00);
    background: -moz-linear-gradient(top, #3C9300, #398A00);
    background: -ms-linear-gradient(top, #3C9300, #398A00);
    background: -o-linear-gradient(top, #3C9300, #398A00);
 -webkit-transition: border .20s;
 -moz-transition: border .20s;
 -o-transition: border .20s;
 transition: border .20s;
}
button.greenbtn:hover {
    border: 1px solid #2D6200 !important;
    background: #3F83F1;
    background: -webkit-linear-gradient(top, #3C9300, #368200);
    background: -moz-linear-gradient(top, #3C9300, #368200);
    background: -ms-linear-gradient(top, #3C9300, #368200);
    background: -o-linear-gradient(top, #3C9300, #368200);
}
button.redbtn {
    border: 1px solid #D14836 !important;
    background: #D64937;
    background: -webkit-linear-gradient(top, #DC4A38, #D14836);
    background: -moz-linear-gradient(top, #DC4A38, #D14836);
    background: -ms-linear-gradient(top, #DC4A38, #D14836);
    background: -o-linear-gradient(top, #DC4A38, #D14836);
 -webkit-transition: border .20s;
 -moz-transition: border .20s;
 -o-transition: border .20s;
 transition: border .20s;
}
button.redbtn:hover {
    border: 1px solid #B0281A !important;
    background: #D14130;
    background: -webkit-linear-gradient(top, #DC4A38, #C53727);
    background: -moz-linear-gradient(top, #DC4A38, #C53727);
    background: -ms-linear-gradient(top, #DC4A38, #C53727);
    background: -o-linear-gradient(top, #DC4A38, #C53727);
}
button.action:hover {
    -moz-box-shadow: 0 1px 0px #DDD;
    -webkit-box-shadow: 0 1px 0px #DDD;
    box-shadow:iset 0 1px 0px #DDD;
}
button.action:active {
    -moz-box-shadow: none !important;
    -webkit-box-shadow: none !important;
    box-shadow: none !important;
    border-color: #C6C6C6 !important;
}
button.bluebtn:active {
    border-color: #2F5BB7 !important;
}
button.greenbtn:active {
    border-color: #2D6200 !important;
}
button.redbtn:active {
    border-color: #B0281A !important;
}
/*------------------------------------*
    $BUTTON LABEL
*------------------------------------*/
 button span.label {
    display: inline-block;
    float: left;
    line-height: 17px;
    height: 18px;
    padding: 0 1px;
    overflow: hidden;
    color: #444;
 -webkit-transition: color .20s;
 -moz-transition: color .20s;
 -o-transition: color .20s;
 transition: color .20s;
}
button span.label {
    line-height: 15px !important;
}
button:hover .label.bluebtn {
    color: #7090C8;
}
button:hover .label.greenbtn {
    color: #42B449;
}
button:hover .label.yellow {
    color: #F7CB38;
}
button.bluebtn .label {
    color: #FFF !important;
    text-shadow: 0 1px 0 #2F5BB7 !important;
}
button.greenbtn .label {
    color: #FFF !important;
    text-shadow: 0 1px 0 #2D6200 !important;
}
button.redbtn .label {
    color: #FFF !important;
    text-shadow: 0 1px 0 #B0281A !important;
}
button.action .label {
    padding: 0 17px !important;
}
button.action:active .label {
    color: #333 !important;
}
button.bluebtn:active .label, button.greenbtn:active .label, button.redbtn:active .label {
    color: #FFF !important;
}