Holy Grail Grid

---
/**
 * HolyGrailGrid — Production-grade CSS grid layout container with sticky header, dual sidebars, fluid content, and footer.
 * 
 * @param {string} leftWidth - Left sidebar width. Default is '240px'.
 * @param {string} rightWidth - Right sidebar width. Default is '220px'.
 * @param {string} gap - Spacing gap between grid regions. Default is '1.5rem'.
 * @param {string} className - Optional CSS class.
 */
interface Props {
  leftWidth?: string;
  rightWidth?: string;
  gap?: string;
  className?: string;
}

const {
  leftWidth = '240px',
  rightWidth = '220px',
  gap = '1.5rem',
  className = '',
} = Astro.props;
---

<div
  class:list={['holy-grail', className]}
  style={`--hg-left: ${leftWidth}; --hg-right: ${rightWidth}; --hg-gap: ${gap};`}
>
  <header class="holy-grail__header">
    <slot name="header" />
  </header>

  <div class="holy-grail__middle">
    <aside class="holy-grail__left">
      <slot name="left" />
    </aside>

    <main class="holy-grail__main">
      <slot />
    </main>

    <aside class="holy-grail__right">
      <slot name="right" />
    </aside>
  </div>

  <footer class="holy-grail__footer">
    <slot name="footer" />
  </footer>
</div>

<style>
  .holy-grail {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
    color: var(--c-text-1, #ffffff);
    font-family: var(--font-sans, system-ui, sans-serif);
  }

  .holy-grail__header {
    width: 100%;
    padding: var(--sp-4, 1rem) var(--sp-6, 1.5rem);
    background: rgba(10, 10, 14, 0.8);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .holy-grail__middle {
    display: grid;
    grid-template-columns: var(--hg-left) 1fr var(--hg-right);
    gap: var(--hg-gap);
    flex: 1;
    max-width: 1440px;
    margin: 0 auto;
    width: 100%;
    padding: var(--sp-6, 1.5rem);
  }

  .holy-grail__left,
  .holy-grail__right {
    padding: var(--sp-4, 1rem);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--r-lg, 16px);
    height: fit-content;
    position: sticky;
    top: 2rem;
  }

  .holy-grail__main {
    padding: var(--sp-6, 1.5rem);
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--r-lg, 16px);
    min-height: 400px;
  }

  .holy-grail__footer {
    width: 100%;
    padding: var(--sp-6, 1.5rem);
    background: rgba(10, 10, 14, 0.9);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: auto;
  }

  @media (max-width: 1024px) {
    .holy-grail__middle {
      grid-template-columns: var(--hg-left) 1fr;
    }
    .holy-grail__right {
      display: none;
    }
  }

  @media (max-width: 768px) {
    .holy-grail__middle {
      grid-template-columns: 1fr;
    }
    .holy-grail__left {
      position: static;
    }
  }
</style>