* {
    margin: 0;
    bottom: 0;
    border: none;
}

body {
    display: flex;
    width: 100%;
    height: auto;
    font-family: Arial, Helvetica, sans-serif;
    flex-direction: column;
    align-items: center;
}

.position {
    padding: 25px;
}

#spanPosition {
    color: darkturquoise;
    font-weight: 600;
    font-size: 24px;
}

.field {
    display: flex;
    width: 600px;
    height: 600px;
    margin: auto;
    background: gray;
    border-radius: 24px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.item {
    cursor: pointer;
    position: relative;
    display: flex;
    padding: 10px;
    background: #000;
    width: 170px;
    border-radius: 24px;
    height: 170px;
    margin: 5px;
    color: white;
    justify-content: center;
}

.cross:before, .cross:after {
    position: absolute;
    left: 87px;
    top: -15px;
    content: ' ';
    height: 220px;
    width: 15px;
    background-color: red;
}

.cross:before {
    transform: rotate(45deg);
}

.cross:after {
    transform: rotate(-45deg);
}

.zero:after {
    position: absolute;
    top: 14px;
    content: ' ';
    border: blue solid 14px;
    width: 135px; 
    height: 135px;
    border-radius: 50%;
}

.wincolor {
    background-color: rgb(131, 255, 131);
}

.victory {
    margin-top: 24px;
    display: none;
    flex-direction: column;
}

.textwin {
    font-size: 25px;
    margin-bottom: 12px;
}

#spanWin {
    font-size: 24px;
    color: darkgreen;
    font-weight: 700;
}

.btnnewgame {
    padding: 12px;
    background-color: rgb(122, 22, 86);
    border-radius: 12px;
    color: #fff;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
}

.btnnewgame:hover {
    background: #3a000a;
}

@media (max-width: 600px) {
    .field {
        width: 90vw;
        height: 90vw;
    }
    .item {
        width: 24vw;
        height: 24vw;
        margin: 5px;
    }
    .cross:after,.cross:before {
        left: 12.5vw;
        top: -1.5vw;
        height: 30vw;
        width: 2.5vw;
    }
    .zero:after {
        top: 1.5vw;
        border: blue solid 2vw;
        width: 20vw; 
        height: 20vw;
    }
}
@media (max-width: 500px) {
    .item {
        margin: 2px;
    }
}

@media (max-width: 400px) {
    .field {
        width: 95vw;
        height: 95vw;
    }
    .item {
        margin: 2px;
    }
    .cross:after,.cross:before {
        left: 13.5vw;
        top: 0vw;
        height: 30vw;
        width: 2.5vw;
    }
    .zero:after {
        top: 2.2vw;
        border: blue solid 2.5vw;
        width: 20vw; 
        height: 20vw;
    }
}

@media (max-width: 320px) {
    .field {
        width: 100vw;
        height: 100vw;
    }
    .item {
        margin: 2px;
    }
}