header {
    display: flex;
    align-items: center;
    justify-content: center;

    /* width: 20vw; */
    width:90vw;
    height: 4rem;
    border-radius: 1rem;
    border-color: gray;
    border-width: .125rem;
    border-style: solid;
    margin: auto;
    /* padding-left: 35vw;
    padding-right: 35vw; */
}

a {
    text-decoration: none;
    color: black;
}

body {
    background-image: url(https://tenor.com/view/kendrick-lamar-knuckles-gif-pixel-gif-16364138293643766284);
    background-size: cover;

    margin: 0;
    padding: 0;
    height: 100vh;
}
h1 {
    display: flex;
    flex-direction: row;
    justify-content: center;
}
button {
    margin: .5rem;

}
.cell {
    height: 3rem;
    width: 3rem;
    padding: 1rem;
}
#gameboard {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center; 
}