body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

#musicControls {
    margin-top: 20px;
}

button {
    padding: 10px 20px;
    font-size: 18px;
    margin: 10px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

button:hover {
    background-color: #45a049;
}

#instrumentSelector {
    margin-top: 10px;
    padding: 5px;
}

#pianoRoll {
    margin-top: 20px;
}

#pianoRoll button {
    width: 40px;
    height: 40px;
    margin: 5px;
    font-size: 16px;
    background-color: #333;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#pianoRoll button:hover {
    background-color: #45a049;
}

#visualization {
    width: 100%;
    height: 200px;
    margin-top: 20px;
    background-color: black;
    border: 1px solid white;
}