body {
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    text-align: center;
    max-width: 100%;
}

#board {
    width: 300px;
    height: 300px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    border: 2px solid #333;
}

.square {
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
}

.dark {
    background-color: #769656;
}

.light {
    background-color: #eeeed2;
}

.controls {
    margin-top: 20px;
}

button {
    padding: 8px 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}