body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
    color: #333;
}

h1 {
    color: #1c1e21;
    text-align: center;
}

.control-section {
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#connectButton {
    font-size: 1.1rem;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    background-color: #28a745;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

#connectButton:hover {
    background-color: #218838;
}

#connectButton:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#btStatus {
    margin-top: 10px;
    font-weight: bold;
}

#outputContainer {
    margin-top: 10px;
    text-align: center;
    min-height: 50px;
}

#outputText {
    font-size: 1.8rem;
    font-weight: bold;
    color: #555;
    padding: 15px 25px;
    border: 2px solid #ddd;
    border-radius: 8px;
    background-color: #fff;
    min-width: 250px;
    display: inline-block;
}

#visualIndicator {
    width: 100px;
    height: 100px;
    margin-top: 20px;
    background-color: #e9ecef;
    border: 2px solid #ced4da;
    border-radius: 50%;
    transition: background-color 0.4s, transform 0.4s;
}