body { font-family: sans-serif; background-color: #f4f4f9; }
.chat-container {
    width: 400px;
    margin: 50px auto;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    background: #fff;
}
.session-bar {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 8px;
    background-color: #f7f7f7;
    border-bottom: 1px solid #e5e5e5;
}
#session-select { flex: 1; min-width: 0; }
#new-session-btn, #delete-session-btn, #config-btn {
    background-color: #e0e0e0;
    color: #000;
    border: none;
    padding: 8px 12px;
    border-radius: 12px;
    cursor: pointer;
}
.chat-box {
    height: 500px;
    padding: 15px;
    overflow-y: auto;
}
.message { padding: 8px 12px; margin-bottom: 10px; border-radius: 18px; max-width: 80%; }
.user-message { background-color: #007bff; color: white; align-self: flex-end; margin-left: auto; }
.bot-message { background-color: #e9e9eb; color: black; align-self: flex-start; }
.input-container { display: flex; padding: 10px; background-color: #f1f1f1; }
#user-input { flex-grow: 1; border: 1px solid #ccc; padding: 10px; border-radius: 20px; }
#send-btn { background-color: #007bff; color: white; border: none; padding: 10px 15px; margin-left: 10px; border-radius: 20px; cursor: pointer; }