body {
    background: #bbb;
}

.grid {
    width: 200px;
    height: 200px;
    border: 1px solid blue;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
}

.grid div {
    width: 20px;
    height: 20px;
}

.controlTbl td {
    padding: 0.5em;
}

.control {
    width: 7em;
    height: 3em;
}

.snake {
    background: green;
}

.apple {
    background: red;
    border-radius: 20px;
}

.popup {
    background: rgb(32, 31, 31);
    width: 100px;
    height: 100px;
    position: fixed;
    top: 150px;
    left: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.playAgain {
    display: none;
}

.display-none {
    display: none;
}

.display-block {
    display: block;
}