body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #222;
    color: white;
    margin: 0;
}
.container {
    text-align: center;
    background: #333;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}
.controls {
    margin: 10px 0;
}
.visual-container {
    margin: 20px 0;
}
#visual-indicator {
    width: 20px;
    height: 20px;
    background-color: red;
    border-radius: 50%;
    margin: auto;
    transition: opacity 0.1s, transform 0.3s;
    opacity: 0.5;
}
button {
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
button:hover {
    background: #0056b3;
}