I've been refactoring the Pagecord blog markup and CSS to remove Tailwind which is really a yak shave so I can make it easier to customise blogs with basic CSS. It's far from production ready but here's one I made earlier.

The custom CSS block to achieve this is extremely hacky, but if you're interested:

<style>
  body {
    background-image: url("https://images.unsplash.com/photo-1465146344425-f00d5f5c8f07?ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&q=80&w=2076");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    min-height: 100vh;
  }
  
  .blog {
    margin: 2rem auto;
    padding: 1rem 2rem;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 1rem;
  }
   
  [data-theme] {
    --theme-bg: #f4f5dc;
    --theme-accent: #3a2fad
  }
  
  .top-nav {
    justify-content: center;
  }

  .social-link {
    text-transform: uppercase;
  }

  .titlebar {
    justify-content: center;
  }

  .blog-title {
    font-size: 3rem;
    background: linear-gradient(90deg, #00b140, #ff3b30);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
  }
</style>