style.css

* {
    user-select: none;
}
body {
    align-items: center;
    text-align: center;
}
hr {
    width: 300px;
    border: 1px solid black;
}
#board {
    width: 400px;
    height: 400px;
    background-color: rgb(209, 200, 190);
    border: 6px solid rgb(191, 186, 171);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
}
.tile {
    width: 90px;
    height: 90px;
    border: 5px solid rgb(191, 186, 171);
    font-size: 40px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;

}
.tile2 {
    background-color: rgb(236,228,219);
    color: rgb(118,110,102);
}
.tile4 {
    background-color: rgb(235,224,202);
    color: rgb(118,110,102);
}
.tile8 {
    background-color: rgb(233,179,130);
    color: white;
}
.tile16 {
    background-color: rgb(232,153,108);
    color: white;
}
.tile32 {
    background-color: rgb(239,124,94);
    color: white;
}
.tile64 {
    background-color: rgb(228,104,71);
    color: white;
}
.tile128 {
    background-color: rgb(226,207,113);
    color: white;
}
.tile256 {
    background-color: rgb(234,210,124);
    color: white;
}
.tile512 {
    background-color: rgb(235,205,108);
    color: white;
}
.tile1024 {
    background-color: rgb(236,204,98);
    color: white;
}
.tile2048 {
    background-color: rgb(233,201,84);
    color: white;
}
.tile4096 {
    background-color: rgb(236,84,76);
    color: white;
}
.title8192 {
    background-color: rgb(232,60,54);
    color: white;
}
#GameOver {
    position: fixed;
    top: 0;
    left: 0;
    width:100%;
    height:100%;
    display: none;
    text-align: center;
    align-items: center;
    justify-content: center;
    background:rgba(3,233,132,0.3);
}
.gameOverContent{
    display: flex;
    text-align: center;
    align-items: center;
    justify-content: center;
    width: 250px;
    height: 150px;
    background: rgba(255, 0, 0, 0.7);
    box-shadow: rgba(50, 50, 93, 0.25) 0px 2px 5px -1px, rgba(0, 0, 0, 0.3) 0px 1px 3px -1px;
    border-radius: 5px;
    flex-direction: column;
}
.gameOverContent span:nth-child(2){
    margin-top: 20px;
    color: white;
}

#gameOverText {
    font-size: x-large;
    color: white;
}
#newGame {
    cursor: pointer;
    z-index: 1000000;
    display: inline;
}
#topScore {
    margin-top: 20px;
    transition: all 700ms ease-in-out;
}