/* =========================================================
   ALPEKIN LAYOUT LAYER
   ---------------------------------------------------------
   Purpose:
   Reusable layout primitives for all apps:
   Pages, Journal, Core, and future Collections.

   Brand direction:
   Layout should express rhythm, structure, clarity.
   ========================================================= */


/* =========================================================
   CONTAINERS
   ---------------------------------------------------------
   Use these instead of manually repeating max-width logic.
   ========================================================= */

.container,
.container--default,
.container--narrow,
.container--wide,
.content-shell {
  width: min(100% - (var(--container-pad-inline) * 2), var(--container-size, var(--container-max)));
  margin-inline: auto;
}

.container--narrow {
  --container-size: var(--container-narrow);
}

.container--wide {
  --container-size: var(--container-wide);
}

.container--full {
  width: 100%;
  margin-inline: auto;
}


/* =========================================================
   SECTIONS
   ---------------------------------------------------------
   Page sections should use consistent vertical rhythm.
   ========================================================= */

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

.section--tight {
  padding-block: var(--section-padding-block-tight);
}

.section--spacious {
  padding-block: var(--section-padding-block-spacious);
}

.section--dark {
  --link: var(--link-on-dark);
  --link-hover: var(--link-on-dark-hover);
  --text-strong: var(--text);
  --text-muted-dark: var(--text-muted);
  --focus-color: var(--ivory-bone);
  background: var(--grad-earth-forest);
  color: var(--text);
}

.section--paper {
  background: var(--surface-paper);
}

.section--clean {
  background: var(--surface-clean);
}


/* =========================================================
   PAGE SHELLS
   ========================================================= */

.page-shell {
  width: 100%;
  min-height: 100%;
}

.content-shell {
  --container-size: var(--content-measure);
}


/* =========================================================
   COMPOSITION UTILITIES
   ---------------------------------------------------------
   These are layout patterns, not small utilities.
   ========================================================= */

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.stack--sm {
  gap: var(--space-3);
}

.stack--lg {
  gap: var(--space-8);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}

.cluster--sm {
  gap: var(--space-2);
}

.cluster--lg {
  gap: var(--space-6);
}

.center {
  display: grid;
  place-items: center;
}


/* Two-column editorial/service split. */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
  align-items: center;
  gap: var(--space-9);
}


/* Sidebar layout for Journal indexes, dashboards, filters. */
.sidebar-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.32fr) minmax(0, 1fr);
  align-items: start;
  gap: var(--space-8);
}


/* =========================================================
   GRIDS
   ========================================================= */

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
}


/* Flow creates vertical rhythm between unknown children. */
.flow > * + * {
  margin-block-start: var(--flow-space, var(--space-5));
}


/* Dividers and spacers. */
.divider {
  width: 100%;
  height: 1px;
  background: var(--border-dark);
}

.divider--gold {
  background: var(--border-gold-soft);
}

.spacer {
  height: var(--space-8);
}

.spacer--sm {
  height: var(--space-4);
}

.spacer--lg {
  height: var(--space-12);
}


/* =========================================================
   RESPONSIVE LAYOUT RULES
   ========================================================= */

@media (max-width: 1024px) {
  :root {
    --container-pad-inline: var(--container-pad-inline-tablet);
  }

  .split,
  .sidebar-layout {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }

  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  :root {
    --container-pad-inline: var(--container-pad-inline-mobile);
  }

  .section {
    padding-block: var(--space-8);
  }

  .section--tight {
    padding-block: var(--space-6);
  }

  .section--spacious {
    padding-block: var(--space-10);
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}