/* ==========================================================================
   layout.css — Container system, grids, and page structure
   ========================================================================== */

@layer layout {

  /* ---------- Container ---------- */
  .container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--space-md);
  }

  @media (min-width: 768px) {
    .container {
      padding-inline: var(--space-xl);
    }
  }

  .container--narrow {
    max-width: 800px;
  }

  .container--wide {
    max-width: 1400px;
  }

  /* ---------- Grids ---------- */
  .grid {
    display: grid;
    gap: var(--space-lg);
  }

  .grid--2 {
    grid-template-columns: 1fr;
  }

  .grid--3 {
    grid-template-columns: 1fr;
  }

  .grid--4 {
    grid-template-columns: 1fr;
  }

  @media (min-width: 640px) {
    .grid--2 {
      grid-template-columns: repeat(2, 1fr);
    }

    .grid--3 {
      grid-template-columns: repeat(2, 1fr);
    }

    .grid--4 {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (min-width: 900px) {
    .grid--3 {
      grid-template-columns: repeat(3, 1fr);
    }

    .grid--4 {
      grid-template-columns: repeat(3, 1fr);
    }
  }

  @media (min-width: 1100px) {
    .grid--4 {
      grid-template-columns: repeat(4, 1fr);
    }
  }

  /* ---------- Article layout (content + sidebar) ---------- */
  .article-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  @media (min-width: 1024px) {
    .article-layout {
      grid-template-columns: 1fr var(--sidebar-width);
    }
  }

  .article-layout__content {
    min-width: 0;
  }

  .article-layout__sidebar {
    display: none;
  }

  @media (min-width: 1024px) {
    .article-layout__sidebar {
      display: block;
    }
  }

  /* ---------- Section spacing ---------- */
  .section {
    padding-block: var(--space-3xl);
  }

  .section--sm {
    padding-block: var(--space-xl);
  }

  .section--lg {
    padding-block: var(--space-4xl);
  }

  .section__header {
    margin-bottom: var(--space-xl);
  }

  .section__title {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 800;
    position: relative;
    display: inline-block;
  }

  .section__title::after {
    content: "";
    display: block;
    width: 40px;
    height: 3px;
    background: var(--color-accent);
    margin-top: var(--space-sm);
    border-radius: var(--radius-full);
  }

  /* ---------- Page body (pushes content below fixed nav) ---------- */
  .page-body {
    padding-top: var(--nav-height);
  }

  /* ---------- Flex utilities ---------- */
  .flex {
    display: flex;
  }

  .flex--center {
    align-items: center;
    justify-content: center;
  }

  .flex--between {
    align-items: center;
    justify-content: space-between;
  }

  .flex--wrap {
    flex-wrap: wrap;
  }

  .flex--gap-sm {
    gap: var(--space-sm);
  }

  .flex--gap-md {
    gap: var(--space-md);
  }

  .flex--gap-lg {
    gap: var(--space-lg);
  }
}