body {
    background: #f8f9fa;
}

.chat-box {
    height: 420px;
    overflow-y: auto;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 15px;
    background: #ffffff;
}

.message {
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 12px;
}

.user-message {
    background: #e7f1ff;
    margin-left: 15%;
}

.bot-message {
    background: #f1f3f5;
    margin-right: 15%;
}

.sources {
    font-size: 0.9rem;
}