.Square {
    border: 1px solid #CCC;
    height: 250px;
    width: 250px;
    background-color: #DDD;
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    -ms-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    -ms-justify-content: center;
    justify-content: center;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    color: white;
    -webkit-tap-highlight-color: rgba(0,0,0,0);
}

.Square:hover {
    cursor: pointer;
}

.Square.active {
    background-color: #f1e33f;
}

.Square.pressed {
    background-color: #2ecc71;
}

.Square.canceled {
    background-color: #e74c3c;
}