index.css

*{
    padding: 0;
    margin: 0;
}
.body{
    background: url("https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQ-ElcVoyyKscseyrsiMDJMITogq0-Rrauhhw&usqp=CAU");
    background-color: red ;
    min-height: 100vh;
    background-size: 100vw 100vh;
    display: flex;
    text-align: center;
    justify-content: center;
}
#board{
    background: linear-gradient(rgb(122, 175, 199) ,rgb(194, 194, 92));
    width: 90vmin;
    height: 92vmin;
    border: 2px solid rgb(22, 22, 24);
    display: grid ;
    grid-template-rows: repeat(18 , 1fr);
    grid-template-columns: repeat(18 ,1fr);
}
.head{
    background-color: red;
    border: 2px solid orange;
}
.snake{
    background-color: purple;
    border: 25vmin solid white;
    border-radius: 12px;
}
.food{
    background-color: green;
    border: 2px solid purple;
    border-radius: 8px;
}