body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    color: #333;
}

header {
    background: #6c757d;
    color: white;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

header p {
    margin: 5px 0 0;
    font-size: 1.2rem;
}

#game-container {
    max-width: 800px;
    margin: 20px auto;
}

#menu button {
    padding: 10px 20px;
    font-size: 1.2rem;
    margin: 10px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

#menu button:hover {
    background: #0056b3;
}

#chess-area, #tutorial-area {
    display: none;
    margin-top: 20px;
    padding: 20px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#board {
    margin: 20px auto;
}

#info-panel {
    margin-top: 20px;
}

#reset-button, #next-tutorial {
    padding: 10px 20px;
    font-size: 1rem;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

#reset-button:hover, #next-tutorial:hover {
    background: #218838;
}