/* ============================================================
   LAYOUT.CSS — INGCO Forge + Blueprint Hybrid Design System
   Grid · Containers · Page Structure · Responsive Breakpoints
   ============================================================ */

/* ── Site Wrapper ───────────────────────────────────────────── */
.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Main Content ───────────────────────────────────────────── */
#main-content {
  flex: 1;
}

/* ── Page Content Offset (accounts for sticky header) ───────── */
.page-content {
  padding-top: var(--header-height);
}

/* ── Container Variants ─────────────────────────────────────── */
.container-sm {
  max-width: 768px;
  width: 100%;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.container-md {
  max-width: 1024px;
  width: 100%;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.container-lg {
  max-width: 1400px;
  width: 100%;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.container-fluid {
  width: 100%;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

/* ── Shop Layout (sidebar + content) ───────────────────────── */
.shop-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .shop-layout {
    grid-template-columns: 1fr;
  }
  .shop-layout .sidebar {
    position: static;
  }
}

/* ── Products Grid ──────────────────────────────────────────── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Two Column ─────────────────────────────────────────────── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .two-col {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* ── Three Column ───────────────────────────────────────────── */
.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

@media (max-width: 1024px) {
  .three-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .three-col {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* ── Four Column ────────────────────────────────────────────── */
.four-col {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .four-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .four-col {
    grid-template-columns: 1fr;
  }
}

/* ── Single Product Layout ──────────────────────────────────── */
.single-product-layout {
  display: grid;
  grid-template-columns: 260px 1fr 360px;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 1200px) {
  .single-product-layout {
    grid-template-columns: 1fr 360px;
  }
  .single-product-layout .product-mini-cart-col {
    display: none;
  }
}

@media (max-width: 768px) {
  .single-product-layout {
    grid-template-columns: 1fr;
  }
}

/* ── Cart + Checkout Layout ─────────────────────────────────── */
.cart-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .cart-layout {
    grid-template-columns: 1fr;
  }
}

/* ── Two-thirds + One-third Layout ─────────────────────────── */
.col-2-3-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 768px) {
  .col-2-3-layout {
    grid-template-columns: 1fr;
  }
}

/* ── Masonry (CSS only) ─────────────────────────────────────── */
.masonry {
  columns: 3;
  column-gap: 1.5rem;
}
.masonry > * {
  break-inside: avoid;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .masonry {
    columns: 2;
  }
}

@media (max-width: 480px) {
  .masonry {
    columns: 1;
  }
}

/* ── Horizontal Scroll Wrapper ──────────────────────────────── */
.scroll-x {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 0.5rem;
}
.scroll-x::-webkit-scrollbar { display: none; }
.scroll-x > * {
  flex-shrink: 0;
  scroll-snap-align: start;
}

/* ── Stack (vertical flex list) ────────────────────────────── */
.stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.stack-sm { gap: 0.5rem; }
.stack-lg { gap: 2rem; }

/* ── Cluster (horizontal flex wrap) ────────────────────────── */
.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

/* ── Center layout ──────────────────────────────────────────── */
.layout-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-block: 4rem;
}

/* ── Hero layout ─────────────────────────────────────────────  */
.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2rem;
  min-height: calc(100svh - var(--header-height));
}

@media (max-width: 768px) {
  .hero-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

/* ── Section Gutter ─────────────────────────────────────────── */
.section-gutter {
  padding-block: clamp(3rem, 6vw, 5rem);
}
.section-gutter-sm {
  padding-block: clamp(1.5rem, 3vw, 2.5rem);
}
.section-gutter-lg {
  padding-block: clamp(5rem, 10vw, 8rem);
}

/* ── Page Header ────────────────────────────────────────────── */
.page-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: 2.5rem 0;
}
.page-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.page-title {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  color: var(--c-text-primary);
  letter-spacing: 0.03em;
  margin: 0;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-size: var(--text-small);
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--c-text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}
.breadcrumb a:hover {
  color: var(--c-brand);
}
.breadcrumb .sep {
  color: var(--c-border);
}
.breadcrumb .current {
  color: var(--c-brand);
}

/* ── Empty State ────────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 4rem 2rem;
  color: var(--c-text-muted);
  gap: 1rem;
}
.empty-state svg {
  color: var(--c-border);
  width: 64px;
  height: 64px;
  margin-inline: auto;
}
.empty-state h3 {
  font-family: var(--font-ui);
  font-size: var(--text-h3);
  color: var(--c-text-secondary);
}

/* ── Toolbar (above product grid) ──────────────────────────── */
.shop-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.shop-toolbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.products-count {
  font-family: var(--font-ui);
  font-size: var(--text-small);
  color: var(--c-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.sort-select {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  color: var(--c-text-secondary);
  font-family: var(--font-ui);
  font-size: var(--text-small);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-base);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239A9080' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}
.sort-select:focus {
  border-color: var(--c-brand);
}
.view-toggle {
  display: flex;
  gap: 4px;
}
.view-btn {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
  padding: 8px 10px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), border-color var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}
.view-btn.active,
.view-btn:hover {
  color: var(--c-brand);
  border-color: var(--c-brand);
}

/* ── Sticky Sidebar (handled via CSS, position is on .sidebar) ─ */
.sticky-col {
  position: sticky;
  top: calc(var(--header-height) + 1rem);
  height: fit-content;
}