I want to achieve it so that the email box stretches all the way and touches the sign up button.

Here is my code which I have used to try and do it right now:

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    <div class="flex flex-row">
        <div class="grow">
            <input class="w-[100%] text-[#9c9ea5] py-3 px-4 rounded-md" placeholder="Enter your email" type="email" name="emailinput">
        </div>

        <div class="flex grow justify-end">
            <button class="px-4 py-3 rounded-md bg-[#6E6BFF] text-white">Sign Up</button>
        </div>
    </div>
</div>

Am I doing anything wrong?

Kind Reguards,
Henry.