/****************************************************************************/
/* App */
/****************************************************************************/
 #app
{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 4px;
    background-color: #77A;
    background: -webkit-linear-gradient(top, white, #003);
    background: -moz-linear-gradient(top, white, #003);
    background: -ms-linear-gradient(top, white, #003);
    background: linear-gradient(top, white, #003);
}

#app>header
{
    margin: 0;
    padding: 0 0.5em;
    font-size: 1.5em;
    color: WhiteSmoke;
    background-color: #006;
}

#app>footer
{
    position: absolute;
    bottom: 0;
    padding: 0.25em;
    color: WhiteSmoke;
}

#main-keyboard
{
    padding: 4px;
    text-align: center;
}

.keyboard
{
    padding-bottom: 6px;
}

.backboard
{
    position: relative;
    height: 32px;
    background-color: #2A1506;
    border-bottom: 2px solid black;
    box-shadow: 3px 3px 4px 1px rgba(0, 0, 0, 0.9);
}

.keyboard .piano-key
{
    display: inline-block;
    border-bottom-right-radius: 4px;
    border-bottom-left-radius: 4px;
    cursor: pointer;
}

.keyboard .piano-key.white
{
    width: 50px;
    height: 300px;
    background-color: Ivory;
    box-shadow: 3px 3px 4px 1px rgba(0, 0, 0, 0.7);
    z-index: 1;
    margin: 0 2px;
}
.keyboard .piano-key.white.down
{
    background-color: #F1F1F0;
    background: -webkit-linear-gradient(top, Ivory, #D5D5D0);
    background: -moz-linear-gradient(top, Ivory, #D5D5D0);
    background: -ms-linear-gradient(top, Ivory, #D5D5D0);
    background: linear-gradient(top, Ivory, #D5D5D0);
    box-shadow: 2px 2px 3px 1px rgba(0, 0, 0, 0.6);
}

.keyboard .piano-key.black
{
    position: relative;
    width: 40px;
    height: 200px;
    left: -23px;
    margin-right: -46px;
    vertical-align: top;
    background-color: black;
    box-shadow: 2px 2px 3px 1px rgba(0, 0, 0, 0.6);
    z-index: 2;
}
.keyboard .piano-key.black.down
{
    background-color: #111;
    background: -webkit-linear-gradient(top, Black, #222);
    background: -moz-linear-gradient(top, Black, #222);
    background: -ms-linear-gradient(top, Black, #222);
    background: linear-gradient(top, Black, #222);
    box-shadow: 1px 1px 2px 1px rgba(0, 0, 0, 0.6);
}