```html
<script src="/tailwindcss.js"></script>
<div class="min-h-screen bg-white">
    <header class="bg-white shadow-md">
        <nav class="container mx-auto px-4 p-4 flex justify-between items-center">
            <a href="/" class="text-xl font-bold text-blue-600">Contributor Portal</a>
            <div>
                <a href="https://about.google.com/research/contribute.html" class="px-4">Contribute</a>
            </div>
        </nav>
    </div>

    <main class="container mx-auto px-4 py-8">
        <section class="max-w-lg mx-auto px-4">
            <h1 class="text-3xl font-bold text-center">
                <h2>Research Contributor Portal</h2>
                <p class="text-gray-600 text-sm text-center">We value collaboration. If you have original research to share</p>
            </h1>
            <form class="mt-6 p-6 border border-gray-200 rounded-lg">
                <div class="mb-4">
                    <label class="block text-xs font-medium mb-2">Your Information</label>
                    <input type="text" class="w-full p-2 rounded text-sm border border-gray-200 w-full">
                    <p class="text-xs text-gray-500 mt-1">Full Name</p>
                </div>
                <div class="mb-4">
                    <label class="block text-xs text-gray-500 text-sm">Research Title</label>
                    <input type="text" class="w-full p-2 border p-3 rounded text-sm border-gray-200 text-base">
                </div>
                <div class="mb-4">
                    <label class="text-xs">Contribution Type</label>
                    <select class="p-2 border text-sm p-2 px-3 rounded-sm w-full border-gray-200"></select>
                </div>
                <button class="rounded-full bg-blue-600 text-white px-4 p-2 text-white font-medium bg-blue-600 hover:bg-blue-500">
                    Submit
                </button>
                <p class="text-sm text-blue-500 mt-4 hover:underline"></p>
            </form>
        </section>
    </main>
</div>
</html>