hyva-themes/magento2-default-theme — reverse-engineered prompt

Build me a clean default storefront theme for Magento 2 using Hyvä as the base. I want it to feel fast and modern, with Tailwind styling, and be ready for a real shop rather than just a demo. Please cover the normal store pages like home and CMS pages, category and product pages, search results, customer account screens, wishlist, cart and checkout, contact, reviews, newsletter, and the usual Magento messages and forms.

Set it up as a Magento theme package that can be installed with Composer, registered correctly, and activated from the Magento admin. Keep the look simple and easy to customize later, with sensible reusable templates and styling assets. Please also include clear setup notes for Magento 2.4 or newer, including the commands to install, run setup upgrade, and turn on the hyva/default theme. If anything depends on the current Hyvä docs or private package access, look it up online and leave practical instructions.