body {
    font-family: Calibri, "Segoe UI", sans-serif;
}

#numbers {
    display: inline-block;
    float: left;
}

.button {
    width: 160px;
    height: 160px;
    line-height: 160px;
    text-align: center;
    font-size: 100px;
    background-size: cover;
    cursor: pointer;
    margin: 15px;
    display: inline-block;
    float: left;
}

.number-element {
    text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;
    background-color: gray;
    background-blend-mode: screen;
}

.red {
    color: blue;
    background-image: url("../images/flower_red.png");
}

.green {
    color: red;
    background-image: url("../images/flower_green.png");
}

.first-in-line {
    clear: left;
}

.rus-button {
    background-image: url("../images/rus_flag.jpg");

}

.eng-button {
    background-image: url("../images/us_flag.jpg");

}

.play-button {
    text-align: center;
    width: 160px;
    height: 160px;
    background-color: red;
}