.keyboard {
    width: 960px;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.keyboard .key {
    display: inline-block;
    margin: 1px;
    padding: 2px;
    height: 45px;
    width: 45px;
    border-radius: 4px;
    color: #555;
    background-color: #fcfcfc;
    border: solid 1px #ccc;
    border-bottom-color: #bbb;
    box-shadow: inset 0 -2px 0 #bbb;
    cursor: pointer;
    overflow: hidden;
}

.keyboard .up-key,
.keyboard .down-key {
    display: block;
    height: 49%;
}

.keyboard .key:active,
.keyboard .key.active {
    background-color: #efefef;
    box-shadow: inset 0 0px white;
    border: solid 1px white;
    transform: translateY(1px);
}

.keyboard .key.char-key:not(.space-key) {
    width: 50px;
    font-weight: bold;
    font-family: Courier New, Courier, monospace;
    font-size: 18px;
}

.keyboard .key.special-key {
    width: 60px;
    position: relative;
}

.keyboard .row:first-child .key { /*functional keys*/
    font-size: 14px;
    width: 44px;
    height: 30px;
}
.keyboard .row:nth-child(2) .key:last-child { /*Backspace*/
    width: 135px;
    text-align: right;
}
.keyboard .row:nth-child(3) .key:first-child { /*Tab*/
    width: 80px;
}
.keyboard .row:nth-child(3) .key:last-child { /*|\*/
                                              width: 105px;
}
.keyboard .row:nth-child(4) .key:first-child { /*CapsLock*/
    width: 95px;
}
.keyboard .row:nth-child(4) .key:last-child { /*Enter*/
    width: 153px;
    text-align: right;
}
.keyboard .row:nth-child(5) .key:first-child { /*Shift_L*/
    width: 125px;
}
.keyboard .row:nth-child(5) .key:last-child { /*Shift_R*/
    width: 185px;
    text-align: right;
}
.keyboard .row:nth-child(6) .key:nth-child(5) { /*Space*/
    width: 224px;
}
.keyboard .row:last-child { /*the key on the right*/
    text-align: right;
}
.keyboard .row:nth-child(6) .key, /*special keys*/
.keyboard .row:nth-child(6) .key:nth-child(9), /*PgUp*/
.keyboard .row:nth-child(6) .key:nth-child(10), /*Up*/
.keyboard .row:nth-child(6) .key:nth-child(11), /*PgDown*/
.keyboard .row:last-child .key {                /*Left Down Right*/
    position: relative;
    text-align: center;
}
.keyboard .key.space-key span,
.keyboard .row:not(:first-child) .key.special-key span { /*Center*/
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    width: 70%;
}