style.css

* {
    box-sizing: border-box;
}
body {
    background-color: #ffe4e1;
    margin: 0;
    font-family: "Fredoka One", cursive;
}
main {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
.game {
    display: flex;
    flex-wrap: wrap;
    position: relative;
}
.board {
    display: flex;
    border: rgb(0, 59, 155) 10px solid;
    border-top: rgb(0, 59, 155) 5px solid;
    border-radius: 2%;
}

.slot {
    height: 5.625rem;
    width: 5.625rem;
    overflow: hidden;
}

.hole {
    transform: translate(-25px, -25px);
    height: 8.75rem;
    width: 8.75rem;
    border-radius: 50%;
    border: solid 30px rgb(0, 59, 155);
}

.player1 {
    background-color: #cc4000;
}
.player2 {
    background-color: rgb(51, 190, 255);
    /* filter: invert(); */
}

.gameover {
    position: absolute;
    height: 100%;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.431);
    display: flex;
    justify-content: center;
    align-items: center;
    visibility: hidden;
    flex-direction: column;
}
.gameover p {
    color: white;
    font-size: 46px;
    padding: 5px;
    /* font-family: sans-serif; */
}

.gameover p.again {
    font-size: 32px;
    cursor: pointer;
    border-bottom: 0px solid white;
    transition: box-shadow 300ms;
    box-shadow: inset 0 0px 0 white, inset 0 -0px 0 rgb(255, 255, 255);
}
.gameover p.again::after {
    content: "?";
}
.gameover p.again:hover::after {
    content: " !";
}
.gameover p.again:hover {
    /* border-bottom: 5px solid white; */
    box-shadow: inset 0 0px 0 rgb(255, 255, 255),
        inset 0 -44px 0 rgba(255, 255, 255, 0.32);
}
.ui {
    margin-left: 10px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}
.ui .player-name {
    padding-left: 5px;
    margin-top: 4px;
    color: white;
    font-weight: bold;
    font-family: "Fredoka One", cursive;
    font-size: large;
    width: 10em;
    border-style: none;
}
.ui .player-name.playing {
    animation: 1s ease-in-out highlight-player infinite alternate;
}
@keyframes highlight-player {
    from {
        color: rgb(255, 255, 255);
    }
    to {
        color: rgb(255, 208, 0);
    }
}

.restart {
    font-size: 32px;
    cursor: pointer;
    z-index: 2;
}

.slot.cursor .hole {
    border-color: #f5f5f5;
}

.cursor {
    opacity: 0.7;
    height: 80px;
    width: 80px;
    z-index: -1;
    border-radius: 50%;
    position: absolute;
    top: -90px;
    left: 5px;
    transition: left ease-out 100ms;
}
.cursor.put {
    transition: top ease-out 200ms;
    opacity: 1;
    filter: invert();
}