@media (max-width: 1024px) {
    .persona-workspace {
        grid-template-columns: 1fr;
    }

    .chat-panel {
        display: none;
    }

    .persona-workspace.chat-mode .editor-panel {
        display: none;
    }

    .persona-workspace.chat-mode .chat-panel {
        display: block;
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        bottom: 0;
        width: 280px;
        z-index: var(--z-fixed);
        transition: left var(--transition-base);
    }

    .sidebar.open {
        left: 0;
        box-shadow: var(--shadow-xl);
    }

    .sidebar-toggle {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .workspace {
        padding: var(--spacing-md);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .main-header {
        padding: var(--spacing-md);
    }

    .main-header h1 {
        font-size: var(--font-size-xl);
    }

    .header-actions {
        display: none;
    }

    .message-bubble {
        max-width: 85%;
    }

    .form-tabs {
        overflow-x: auto;
    }

    .tab-btn {
        white-space: nowrap;
    }
}

@media print {
    .sidebar {
        display: none;
    }

    .main-header {
        position: static;
    }

    .chat-input-container {
        display: none;
    }

    .btn-primary, .btn-secondary {
        display: none;
    }
}