body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
}

.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, violet, indigo, blue, green, yellow, orange, red);
    z-index: -1;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

#tic-tac-toe-board {
    width: 800px;
    height: 800px;
    display: grid;
    grid-template: repeat(3, 1fr) / repeat(3, 1fr);
    background-color: white;
    border: 2px solid #fff;
}

.cell {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 5rem;
    border: 2px solid black; /* Creates the grid */
}

.title-container {
    text-align: center;
    margin-bottom: 20px;
    margin-right: 20px;
}

.title {
    color: white;
    margin-bottom: 10px;
}

.spectrum {
    color: black;
    margin-top: 0;
    font-weight: bold;
    font-size: 1.5rem;
}