/* ============================================================
   LAYOUT — Tu Cajita
   Container, grid helpers, utilidades de espaciado y display.
   Depende de tokens.css.
   ============================================================ */

/* --- Container --- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container-narrow {
  width: 100%;
  max-width: 860px;
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* --- Secciones de página --- */

.section {
  padding-block: var(--space-16);
}

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

.section-lg {
  padding-block: var(--space-24);
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  color: var(--color-text);
  text-align: center;
  margin-bottom: var(--space-2);
}

.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: var(--space-10);
}

/* --- Grid de productos --- */

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

/* --- Grid de categorías (home) --- */

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* --- Grid genérico de 2 columnas --- */

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

/* --- Flex helpers --- */

.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between{ display: flex; align-items: center; justify-content: space-between; }
.flex-gap-2  { gap: var(--space-2); }
.flex-gap-4  { gap: var(--space-4); }

/* --- Utilidades de display --- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

/* --- Utilidades de visibilidad responsive --- */

.hide-mobile   { /* visible en desktop, oculto en móvil */ }
.show-mobile   { display: none; } /* oculto en desktop */

/* scroll-margin-top para que los anchors no queden bajo el sticky-header */
[id] {
  scroll-margin-top: calc(72px + 48px + var(--space-4)); /* header + nav + margen */
}

/* --- Responsive breakpoints ---
   Mobile first: los cambios se declaran en los componentes
   usando estas referencias:
   sm:  480px
   md:  768px
   lg:  1024px
   xl:  1280px
   ------------------------------------------- */

@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .category-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
  .show-mobile { display: revert !important; }

  :root {
    --container-padding: var(--space-4);
  }

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

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

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

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

  .section-lg {
    padding-block: var(--space-16);
  }

  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }
}

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

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