body{
    background-color: #7e0a21;
    color: darkgoldenrod;
    text-align: center;
}

#countdownNum{
    margin: auto 5px;
}

#time{
    margin-left: 5px;
}

.left{
    float: left;
    background-color: midnightblue;
    margin: 15px;
    height: 92vh;
}

.content{
    margin: auto 10px;
    display: flex;
    flex-direction: column;
    height: 90vh;
}

.display{
    display: flex;
    justify-content: center;
}

#disclaimer{
    margin-top: auto;
    align-content: flex-end;
}

#score{
    margin-left: 10px;
}

.board{
    perspective: 800px;
}

.row{
    display: flex;
    margin-bottom: 5px;
    justify-content: center;
}

.card{
    background-color: white;
    margin-right: 10px;
    position: relative;
    width: 110px;
    height: 154px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.12), 0 2px 4px rgba(0,0,0,0.24);

    -webkit-transition: transform 1.5s;
    transition: transform 1.5s;
    transform-style: preserve-3d;
}

.flip{
    -ms-transform: rotateY(-180deg);
    -webkit-transform: rotateY(-180deg);
    transform: rotateY(-180deg);
}

.front{
    position: absolute;
    height: 100%;
    width: 100%;
    backface-visibility: hidden;
    background-image: url("images/card_back.png");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.back{
    position: absolute;
    height: 100%;
    width: 100%;
    backface-visibility: hidden;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;

    -ms-transform: rotateY(-180deg);
    -webkit-transform: rotateY(-180deg);
    transform: rotateY(-180deg);
}

.selected{
    background-blend-mode: multiply;
    background-color: white;
}