.keyboard {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;

    table {
        border-spacing: 10px;
        border-collapse: separate;
        background-color: #F1F1F1;

        td{
            touch-action: none;
        }
    }

    .letter {
        background-color: #bdbdbd;
        box-shadow: 2px 2px 3px #555555;
        width: 47px;
        height: 50px;
        text-align: center;
        font-family: "arial";
        cursor: pointer;
        color: #000;
        font-size: 22px;

        &:hover{
            background-color: #fafafa;
        }
        &:active {
            background-color: #999;
            color: #fff;
        }
    }
    .number {
        background-color: #bdbdbd;
        box-shadow: 2px 2px 3px #555555;
        width: 47px;
        height: 35px;
        text-align: center;
        font-family: "arial";
        cursor: pointer;
        color: #000;
        font-size: 22px;

        &:hover{
            background-color: #fafafa;
        }
        &:active {
            background-color: #999;
            color: #fff;
        }
    }

    .margin {
        width: 40px;
        height: 50px;
    }
}