body {
    font-family: sans-serif;
    max-width: 700px;
    margin: 40px auto;
    padding: 20px;
    background: #151c26;
    color: #dce3ea;
}

button {
    padding: 8px 15px;
    background: #5b9bd5;
    color: #0d1117;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background: #7bb0e0;
}

button:disabled {
    background: #35485c;
    color: #7a8b9c;
    cursor: default;
}

#chat {
    display: none;
}

#messages {
    border: 1px solid #2c3a4a;
    background: #1f2937;
    height: 250px;
    overflow-y: auto;
    padding: 10px;
    margin: 15px 0;
    white-space: pre-wrap;
    border-radius: 4px;
    color: #dce3ea;
}

#message {
    width: 70%;
    padding: 8px;
    border: 1px solid #2c3a4a;
    border-radius: 4px;
    background: #1f2937;
    color: #dce3ea;
}

#status {
    font-weight: bold;
    color: #5b9bd5;
}

#diagnostic {
    display: none;
    border: 1px solid #2c3a4a;
    background: #1f2937;
    padding: 10px;
    white-space: pre-wrap;
    font-family: monospace;
    font-size: 13px;
    max-height: 300px;
    overflow-y: auto;
    color: #dce3ea;
}