*{
    box-sizing: border-box;
}
body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    background: rgb(8, 3, 26);
}
.game{
    width: 538px;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    color: #fff;
    margin: auto;
}

.title {
    background: rgb(48, 56, 119);
    padding: 10px 0;
    margin: 5px auto;
    font-size: 30px;
}

span {
    color: #fa0;
    font-weight: bold;
}

.square {
    width: 175px;
    height: 175px;
    margin: 2px;
    background-color: rgb(48, 56, 119);
    float: left;
    cursor: pointer;
    font-size: 50px;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
}

.square:hover{
    background-color: #fa0;
}


@media (max-width: 761px) {
    .game {
        width: 355px;
    }
    .square {
        width: 114px;
        height: 114px;
    }
}

@media (max-width: 450px) {
    .game {
        width: 250px;
    }
    .square {
        width: 79px;
        height: 79px;
    }
}