* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

body {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#sea {
    display: flex;
}

.player-grid {
    width: 430px;
    height: 430px;
    padding: 5px;
    margin: 5px;
    background-color: darkslategray;
    display: flex;
    flex-wrap: wrap;
}

.player-grid .cell {
    width: 40px;
    height: 40px;
    margin: 1px;
    background-color: darkcyan;
}