@media screen and (max-width: 768px) {
    .main-layout {
        flex-direction: column;
    }

    .left-panel, .right-panel {
        width: 100%;
        display: none;
    }

    .chat-container {
        bottom: 0;
    }

    footer {
        padding-bottom: 60px;
    }

    .mobile-toggle {
        display: block;
    }

    .mobile-toggle button {
        margin: 0 5px;
        padding: 8px 16px;
        font-size: 14px;
        border: none;
        background-color: #007BFF;
        color: white;
        border-radius: 4px;
        cursor: pointer;
    }

    .mobile-toggle button:hover {
        background-color: #0056b3;
    }
}