body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    color: #333;
}

nav {
    background-color: #333;
    padding: 10px;
}

nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
}

main {
    padding: 20px;
}

h2 {
    color: #2c3e50;
}

#intro, #piano, #guitar, #violin {
    background-color: #ffffff;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#piano h2, #guitar h2, #violin h2 {
    font-size: 24px;
    color: #2c3e50;
}

footer {
    background-color: #333;
    color: white;
    padding: 10px;
    position: relative;
    width: 100%;
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    #intro, #piano, #guitar, #violin {
        padding: 15px;
    }

    #contact iframe {
        max-width: 100%;
    }
}