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

.grid {
    width: 420px;
    height: 420px;
    padding: 5px;
    margin: 5px;
    display: flex;
    flex-wrap: wrap;
    background-color: darkturquoise;
}

.grid span {
    width: 40px;
    height: 40px;
    margin: 1px;
    background-color: #eee;
    position: relative;
}

.grid span.hot {
    background-color: darkturquoise;
}

.ship {
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    z-index: 10;
    position: relative;
    margin: -1px;
}

.ship.vertical {
    flex-direction: column;
}

.carrier {
    width: 210px;
    height: 40px;
}

.carrier.vertical {
    width: 40px;
    height: 210px;
}

.battleship {
    width: 168px;
    height: 40px;
}

.battleship.vertical {
    width: 40px;
    height: 168px;
}

.cruiser,
.submarine {
    width: 126px;
    height: 40px;
}

.cruiser.vertical,
.submarine.vertical {
    width: 40px;
    height: 126px;
}

.destroyer {
    width: 84px;
    height: 40px;
}

.destroyer.vertical {
    width: 40px;
    height: 84px;
}

.ship span {
    width: 40px;
    height: 40px;
    background-color: darkcyan;
}

.ship .head {
    border-radius: 20px 0 0 20px;
}

.ship .tail {
    border-radius: 0 10px 10px 0;
}

.ship.vertical .head {
    border-radius: 20px 20px 0 0;
}

.ship.vertical .tail {
    border-radius: 0 0 10px 10px;
}