Nested CSS just ignored #2721

Describe the bug

Hi! I'm learning hyperframes, and for that I usually do things manually (w/o AI, so "I read the code" (c)) to get the understanding of how tools works, and test all its capabilities.

And I think I found an issue.
I have this composition file I want to reuse:

<template>
  <section
    id="required-id"
    data-composition-id="intro-comp"
    data-start="0"
    data-width="1500"
    data-height="900"
    data-hf-id="hf-ku95"
  >

    <style>
      /* Don't use comp ID: it is removed or something */
      
      /* All good */
      [data-composition-id="intro-comp"] h1 {
        text-align: center;
        color:      orangered;
        font-size:  5rem;
      }

      /* Just ignored */
      [data-composition-id="intro-comp"] {
        .title {
          color:      brown;
          text-align: center;
          font-size:  6rem;
        }
      }
    </style>

    <h1 data-hf-id="hf-tvzt">Hyperframes</h1>

    <div data-hf-id="hf-xgyd" class="title">Welcome!</div>

    <script>
      const tl = gsap.timeline({ paused: true });
      tl.from("h1", { opacity: 0, y: -50, duration: 1 });
      tl.from(".title", { opacity: 0, y: -50, duration: 1 });
      window.__timelines["intro-comp"] = tl;
    </script>

  </section>
</template>

But, the .title selector is just ignored :( This means the [data-composition-id="intro-comp"] selector must be repeated for each tag I want to style (and there are a lot) and that makes code really hard to read (old-school times :) )

Hyperframes version: 0.7.66

BTW, If I try to use body tag instead of template (to check the layout in browser) the rendering fails with: The file has no <template> or <body> content to render\n\nCheck that each file referenced by data-composition-src contains valid HTML with a <template> or <body> containing a [data-composition-id] element.

Oh, and another one: linter or checker wants me to add data-layout-allow-overlap in some cases, but there's no such attribute listed in docs.

Thank you for your work!

Link to reproduction

https://lvh.me

Steps to reproduce

See the code

Expected behavior

See the ticket description

Actual behavior

See the ticket description

Environment

Hyperframes version: `0.7.66`
CHrome 150
Node: 24

Additional context

No response