function detectSandbox() {
    function redirect() {
        window.location.href = '/sandboxed.html?v=2.1#' + encodeURIComponent(window.location.href);
    }

    // Check for iframe context
    if (window.frameElement) {
        console.log("Running inside an iframe.");

        // Attempt to detect sandbox attribute
        try {
            if (window.frameElement.hasAttribute("sandbox")) {
                console.log("Sandbox attribute detected.");
                redirect();
            }
        } catch (e) {
            console.log("Sandbox detection via attribute failed:", e);
        }
    } else {
        console.log("Not inside an iframe.");
    }

    // Test feature restrictions as fallback
    try {
        document.domain = document.domain; // Should throw an error if sandboxed
    } catch (e) {
        if (e.toString().toLowerCase().includes("sandbox")) {
            console.log("Sandbox detected via document.domain restriction.");
            redirect();
        }
    }

    try {
        eval("console.log('Eval is allowed');");
    } catch (e) {
        console.log("Eval is restricted (sandboxed).");
        redirect();
    }

    try {
        const script = document.createElement("script");
        script.innerHTML = "console.log('Inline script executed');";
        document.body.appendChild(script);
    } catch (e) {
        console.log("Inline scripts are restricted (sandboxed).");
        redirect();
    }
}
detectSandbox();