Sleek is a modern Jekyll theme focused on speed performance & SEO best practices. It features inlining critical CSS, silky-smooth animations, showing/hiding header on scroll and Asynchronous form submissions with Formspree.  ### Features * Minimal, responsive and speed performance optimized * Compatible with GitHub Pages * SEO friendly, with help of [Jekyll SEO Plugin](https://github.com/jekyll/jekyll-seo-tag) * Form submissions with **[Formspree.io](https://formspree.io/) contact form integration** * Easy Google Tag Manager Integration * Support for Disqus comments * Inline critical CSS with [critical](https://github.com/addyosmani/critical) * Add your **social profiles** easily in `_config.yml`. Only the social icons you enter in `config.yml` will show up on the site footer. * Custom 404 page