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

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

body,
input,
select,
button {
    font-family: monospace;
    font-size: 20px;
}

input,
button {
    border: 1px solid #333;
    padding: 10px;
    border-radius: 0px;
}

button {
    cursor: pointer;
}

.text-center {
    text-align: center;
}

.container {
    display: flex;
}

.row {
    flex-direction: row;
    margin: 1rem 0;
    justify-content: space-between;
}

.column {
    flex-direction: column;
    margin: 0 1rem;
}

.grid {
    width: 430px;
    height: 430px;
    padding: 5px;
    display: flex;
    flex-wrap: wrap;
    background-color: #003768;
}

.grid span {
    width: 40px;
    height: 40px;
    margin: 1px;
    background-color: #3987c9;
    position: relative;
}

.grid span.hot {
    background-color: #7fffd4;
}

.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: lightblue;
}

.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;
}