style.css

/* Light mode (default) */
body {
    font-family: Arial, sans-serif;
    text-align: center;
    padding-top: 50px;
    background-color: #ffffff;
    color: #212529; /* Bootstrap's default text color */
}

/* Dark mode styles */
body.dark-mode {
    background-color: #212529;
    color: #f8f9fa; /* Light text color */
}

/* Board styles for light and dark mode */
#board {
    display: grid;
    grid-template-columns: repeat(3, 120px);
    grid-gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.cell {
    width: 120px;
    height: 120px;
    background-color: #f8f9fa;
    font-size: 3em;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #ced4da;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

body.dark-mode .cell {
    background-color: #343a40; /* Darker cell background in dark mode */
    border-color: #495057; /* Darker border in dark mode */
}

.cell:hover {
    background-color: #e9ecef;
}

body.dark-mode .cell:hover {
    background-color: #495057;
}

#status {
    margin-top: 20px;
    font-size: 1.8em;
    font-weight: 500;
}

#resetBtn {
    margin-top: 30px;
    padding: 10px 30px;
    font-size: 1.2em;
    border-radius: 5px;
}

/* Toggle Button */
#modeToggleBtn {
    margin-top: 10px;
    padding: 10px 20px;
    font-size: 1em;
    border-radius: 5px;
}