/* layout.css — Grid systems, section wrappers, sidebar layouts */

@layer layout {
  /* ── Container ───────────────────────────────────────── */
  .container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
  }

  .container--narrow {
    max-width: 760px;
  }

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

  /* ── Section ─────────────────────────────────────────── */
  .section {
    padding: var(--section-gap) 0;
    position: relative;
  }

  .section--tight {
    padding: clamp(48px, 8vw, 80px) 0;
  }

  .section--full {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .section__header {
    text-align: center;
    margin-bottom: clamp(48px, 6vw, 80px);
  }

  /* ── Grid ────────────────────────────────────────────── */
  .grid {
    display: grid;
    gap: 24px;
  }

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

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

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

  @media (max-width: 900px) {
    .grid--2 { grid-template-columns: 1fr; }
    .grid--3 { grid-template-columns: 1fr; }
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
  }

  @media (max-width: 600px) {
    .grid--4 { grid-template-columns: 1fr; }
  }

  /* ── Sidebar Layout ──────────────────────────────────── */
  .sidebar-layout {
    display: flex;
    gap: 48px;
    padding-top: 80px;
    min-height: 100vh;
    max-width: var(--max-width);
    margin: 0 auto;
    padding-left: var(--content-padding);
    padding-right: var(--content-padding);
  }

  .sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    position: sticky;
    top: 80px;
    align-self: flex-start;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    padding: 32px 0;
  }

  .sidebar__nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .sidebar__link {
    font-family: var(--font-body);
    font-size: var(--type-sm);
    color: var(--color-muted);
    padding: 8px 16px;
    border-left: 2px solid transparent;
    transition: all var(--dur-fast);
    display: block;
  }

  .sidebar__link:hover {
    color: var(--color-text);
  }

  .sidebar__link.active {
    color: var(--color-cyan);
    border-left-color: var(--color-cyan);
  }

  .sidebar__counter {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-ghost);
    margin-bottom: 24px;
    padding-left: 16px;
  }

  .main-content {
    flex: 1;
    min-width: 0;
    max-width: 760px;
    padding: 48px 0;
  }

  @media (max-width: 900px) {
    .sidebar-layout {
      flex-direction: column;
      padding-top: 72px;
      gap: 0;
    }

    .sidebar {
      width: 100%;
      position: relative;
      top: 0;
      max-height: none;
      border-bottom: 1px solid var(--color-border);
      padding: 16px 0;
    }

    .sidebar__nav {
      flex-direction: row;
      overflow-x: auto;
      gap: 8px;
      padding-bottom: 8px;
      -webkit-overflow-scrolling: touch;
    }

    .sidebar__link {
      white-space: nowrap;
      border-left: none;
      border-bottom: 2px solid transparent;
      padding: 6px 12px;
    }

    .sidebar__link.active {
      border-bottom-color: var(--color-cyan);
    }

    .main-content {
      padding: 32px 0;
    }
  }

  /* ── Divider ─────────────────────────────────────────── */
  .divider {
    height: 1px;
    background: var(--color-border);
    margin: 48px 0;
    border: none;
  }

  /* ── Flex utilities ──────────────────────────────────── */
  .flex { display: flex; }
  .flex-col { flex-direction: column; }
  .items-center { align-items: center; }
  .justify-center { justify-content: center; }
  .justify-between { justify-content: space-between; }
  .gap-8 { gap: 8px; }
  .gap-16 { gap: 16px; }
  .gap-24 { gap: 24px; }
  .gap-32 { gap: 32px; }
  .gap-48 { gap: 48px; }

  /* ── Spacing utilities ───────────────────────────────── */
  .mt-8 { margin-top: 8px; }
  .mt-16 { margin-top: 16px; }
  .mt-24 { margin-top: 24px; }
  .mt-32 { margin-top: 32px; }
  .mt-48 { margin-top: 48px; }
  .mb-8 { margin-bottom: 8px; }
  .mb-16 { margin-bottom: 16px; }
  .mb-24 { margin-bottom: 24px; }
  .mb-32 { margin-bottom: 32px; }
  .mb-48 { margin-bottom: 48px; }

  /* ── Text utilities ──────────────────────────────────── */
  .text-center { text-align: center; }
  .text-right { text-align: right; }
  .text-muted { color: var(--color-muted); }
  .text-cyan { color: var(--color-cyan); }
  .text-ghost { color: var(--color-ghost); }
}