body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    background: #f5f5f5;
}
#chat {
    background: white;
    border-radius: 10px;
    padding: 20px;
    height: 400px;
    overflow-y: auto;
    margin-bottom: 20px;
}
.message {
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
}
.user { background: #e3f2fd; text-align: right; }
.assistant { background: #f1f8e9; }
#controls {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}
button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background: #2196F3;
    color: white;
}
button:hover { background: #1976D2; }
button:disabled { background: #ccc; cursor: not-allowed; }
#status {
    margin-top: 10px;
    padding: 10px;
    border-radius: 5px;
    background: #fff3cd;
}
#voiceIndicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: gray;
    margin-left: 10px;
    display: inline-block;
    vertical-align: middle;
}