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

body {
    background: lightblue;
    min-height: 100vh;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
}

#board {
    background-color: linear-gradient(135deg, #2e7d32, #81c784);
    width: 90vmin;
    height: 90vmin;
    border: 4px solid black;
    border-radius: 10px;
    box-shadow: 0px 0px 15px rgba(0, 0, 0, 0.5);
    display: grid;
    grid-template-rows: repeat(18, 1fr);
    grid-template-columns: repeat(18, 1fr);
    margin: auto;
}

.head {
    background-color: darkblue; /* Snake head color */
}

.snake {
    background-color: darkgreen; /* Snake body color */
}

.food {
    background-color: skyblue; /* Food color */
    border-radius: 50%; /* Makes the food circular */
}