style.css

body {
    background: #262626;
    color: white;
    font-family: sans-serif;
}

h1 {
    text-align: center;
}

h1 a {
    text-decoration: none;
    color: white;
}

h1 a:hover {
    color: #60a5fa;
}

#scores {
    margin-top: 100px;
    display: flex;
    flex-direction: row;
}

#scores > div {
    width: 50%;
    text-align: center;
    font-size: 18pt;
}

#board {
    width: 300px;
    margin-inline: auto;
    margin-top: 50px;
    display: grid;
    grid-template-columns: auto auto auto;
    font-size: 48pt;
    user-select: none; 
}

.board-tile {
    height: 100px;
    width: 100px;
    outline:1px solid white;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #404040;
}

.board-tile:nth-child(1) {
    border-top-left-radius: 10px;
}

.board-tile:nth-child(3) {
    border-top-right-radius: 10px;
}

.board-tile:nth-child(7) {
    border-bottom-left-radius: 10px;
}

.board-tile:nth-child(9) {
    border-bottom-right-radius: 10px;
}

#result-div {
    height: 100px;
    width: 250px;
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    border: 1px solid white;
    border-radius: 10px;
    margin-top: 50px;
}

#result-div p {
    text-align: center;
    font-size: 18pt;
}