body {
    font-family: Arial, sans-serif;
    text-align: center;
    background: #f4f4f4;
}

h1 {
    margin-top: 20px;
}

.modes button {
    padding: 10px 15px;
    margin: 5px;
    font-size: 16px;
    cursor: pointer;
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 120px);
    gap: 8px;
    justify-content: center;
    margin: 20px auto;
}

.cell {
    width: 120px;
    height: 120px;
    background: white;
    border: 2px solid #333;
    font-size: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.cell:hover {
    background: #eaeaea;
}

#status {
    font-size: 20px;
    margin-top: 15px;
    min-height: 24px;
}

.restart {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}