body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f4f4f4;
}

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    margin-bottom: 20px;
}

.tuning-controls {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    justify-content: center;
}

.tuning-controls > div {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.tuning-controls label {
    margin-bottom: 5px;
}

.tuning-controls input, .tuning-controls select {
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.strings {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
}

.string-button {
    padding: 15px 25px;
    font-size: 1.2em;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50; /* Green */
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

#play-all {
    padding: 12px 20px;
    font-size: 1em;
    border: none;
    border-radius: 5px;
    background-color: #008CBA; /* Blue */
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

#play-all:hover {
    background-color: #0077B3;
}

#output {
    margin-top: 20px;
    font-weight: bold;
}