style.css

* {
    padding: 0px;
    margin: 0px;
    font-family: 'Itim', cursive;
    background-color: #12181B;
}

.title {
    color: white;
    text-align: center;
    font-size: 40px;
    margin-top: 5%;
}

.display {
    color: white;
    text-align: center;
    font-size: 25px;
    margin-top: 1em;
    margin-bottom: 1em;
}

.playerX {
    color: #09C372;
}

.playerO {
    color: #498AFB;
}

.game-grid {
    margin: 0 auto;
    display: grid;
    grid-template-columns: 33% 33% 33%;
    grid-template-rows: 33% 33% 33%;
    max-width: 300px;
}

.tile {
    border: 1px solid white;
    min-height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 50px;
    cursor: pointer;
}

.hide {
    display: none;
}

.restart {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    margin-top: 1em;
}

#reset {
    color: white;
    border-radius: 8px;
    padding: 10px;
    font-size: 20px;
    border: none;
    cursor: pointer;
    background-color: #FF3860;
}

.signature {
    color: white;
    text-align: center;
    font-size: 25px;
    margin-top: 2em;
}

a:visited {
    color: white;
}