/* ==========================================================
   LAYOUT VARIANT: sidebar-nav
   Source: design-system/layouts/sidebar-nav/site-layout.css
   ========================================================== */

/* ==========================================================
   LAYOUT: Sidebar-Nav — Navigation-First Split Pane
   ==========================================================
   Visual: Left sidebar with sticky category list + right
   main content area. Deep navigation feel, like a docs site.
   Categories are always visible for fast access.
   ========================================================== */

/* ── Homepage: 2-Column Split ── */
.homepage {
  display: grid;
  grid-template-columns: 280px 1fr;
  grid-template-rows: auto auto 1fr auto auto;
  gap: 0 2.5rem;
  max-width: 1400px;
}

/* Hero spans full width */
.hero {
  grid-column: 1 / -1;
  padding: 3.5rem 2rem 3rem;
  text-align: left;
  border-radius: 0;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
}

.hero .subtitle {
  text-align: left;
  margin-left: 0;
}

/* Intro spans full width */
.intro-section {
  grid-column: 1 / -1;
  text-align: left;
}

/* Categories become sidebar */
.categories-section {
  grid-column: 1;
  grid-row: 3;
  position: sticky;
  top: 1.5rem;
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  margin: 0;
  align-self: start;
}

.section-header h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.6;
  margin-bottom: 1rem;
}

.categories-grid {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.category-card {
  padding: 0.875rem 1rem;
  border-radius: 8px;
  border: none;
}

.category-card::before {
  display: none;
}

.category-card:hover {
  transform: none;
  background: var(--site-bg-alt, #faf5ff);
  box-shadow: none;
}

.category-icon {
  font-size: 1.25rem;
  margin-bottom: 0;
  display: inline;
  margin-right: 0.5rem;
}

.category-card h3 {
  font-size: 0.95rem;
  display: inline;
}

.category-card p {
  display: none;
}

.category-meta {
  display: none;
}

/* Content area (SEO body etc.) flows in right column */
.homepage > .content {
  grid-column: 2;
  grid-row: 3;
}

/* SEO components span full width below */
.seo-components {
  grid-column: 1 / -1;
}

.seo-components--primary {
  grid-column: 1 / -1;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.seo-components--secondary {
  grid-column: 1 / -1;
}

/* ── List Page: Sidebar Navigation ── */
.list-page {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0 2rem;
  max-width: 1400px;
}

.breadcrumb {
  grid-column: 1 / -1;
}

.list-page > .page-header {
  grid-column: 2;
}

.list-page > .intro {
  grid-column: 2;
}

.subcategories {
  grid-column: 1;
  grid-row: 3 / 6;
  position: sticky;
  top: 1.5rem;
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  align-self: start;
}

.subcategories h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.5;
}

.category-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.category-list li a {
  padding: 0.625rem 0.875rem;
  border-radius: 6px;
  display: block;
  text-decoration: none;
  font-size: 0.9rem;
  transition: all var(--dur-fast, 150ms) ease;
  border-left: 3px solid transparent;
}

.category-list li a:hover {
  background: var(--site-bg-alt, #f9fafb);
  border-left-color: var(--site-primary, #3b82f6);
}

.category-list li a .description {
  display: none;
}

.list-page > .body-content {
  grid-column: 2;
}

.list-page > .content-pages {
  grid-column: 2;
}

.list-page .seo-components {
  grid-column: 1 / -1;
}

.list-page .seo-components--primary {
  grid-column: 1 / -1;
}

.list-page .seo-components--secondary {
  grid-column: 1 / -1;
}

/* ── SEO Components — Horizontal Scroll Cards ── */
.seo-components--primary {
  display: flex;
  overflow-x: auto;
  gap: 1.25rem;
  padding-bottom: 1rem;
  scroll-snap-type: x mandatory;
}

.seo-card {
  min-width: 300px;
  max-width: 360px;
  flex-shrink: 0;
  scroll-snap-align: start;
}

.seo-more-grid {
  display: flex;
  overflow-x: auto;
  gap: 1rem;
  scroll-snap-type: x mandatory;
}

.seo-more-grid .seo-block {
  min-width: 260px;
  max-width: 320px;
  flex-shrink: 0;
  scroll-snap-align: start;
}

/* ── Responsive: Collapse sidebar on tablet/mobile ── */
@media (max-width: 1024px) {
  .homepage {
    grid-template-columns: 1fr;
  }

  .categories-section {
    position: static;
    max-height: none;
    overflow: visible;
    grid-column: 1;
    grid-row: auto;
  }

  .categories-grid {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .category-card {
    flex: 0 0 auto;
    padding: 0.625rem 1rem;
  }

  .list-page {
    grid-template-columns: 1fr;
  }

  .subcategories {
    position: static;
    max-height: none;
    overflow: visible;
    grid-column: 1;
    grid-row: auto;
  }

  .category-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .category-list li a {
    border-left: none;
    border: 1.5px solid var(--site-border, #e5e7eb);
    border-radius: 999px;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }

  .list-page > .page-header,
  .list-page > .intro,
  .list-page > .body-content,
  .list-page > .content-pages {
    grid-column: 1;
  }

  /* SEO back to grid */
  .seo-components--primary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    overflow: visible;
  }

  .seo-card {
    min-width: auto;
    max-width: none;
  }
}

@media (max-width: 768px) {
  .seo-components--primary {
    grid-template-columns: 1fr;
  }
}


/* ==========================================================
   LAYOUT VARIANT: grid-cards
   Source: design-system/layouts/grid-cards/site-layout.css
   ========================================================== */

/* ==========================================================
   LAYOUT: Grid-Cards — Uniform Product/Catalog
   ==========================================================
   Visual: All cards same size, neat grid like an e-commerce
   product listing. Square aspect-ratio, centered content,
   strong visual hierarchy through icons and hover effects.
   ========================================================== */

/* ── Homepage: Hero Section — Centered, Clean ── */
.hero {
  padding: 5rem 2rem 4.5rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
}

/* ── Homepage: Categories — Uniform Square Cards ── */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.category-card {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1.5rem;
}

.category-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  transition: transform var(--dur-normal, 250ms) ease;
}

.category-card:hover .category-icon {
  transform: scale(1.2);
}

.category-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.category-card p {
  font-size: 0.85rem;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.category-meta {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--site-border, #e5e7eb);
  width: 100%;
  justify-content: center;
}

/* ── Homepage: Intro Section ── */
.intro-section {
  border-radius: 16px;
  text-align: center;
}

/* ── List Page: Subcategories — 3-Column Even Grid ── */
.category-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  list-style: none;
  padding: 0;
}

.category-list li a {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.5rem 1.25rem;
  border: 1.5px solid var(--site-border, #e5e7eb);
  border-radius: 12px;
  text-decoration: none;
  transition: all var(--dur-normal, 250ms) ease;
  min-height: 120px;
  justify-content: center;
}

.category-list li a:hover {
  border-color: var(--site-primary, #3b82f6);
  box-shadow: var(--shadow-md, 0 4px 6px -1px rgba(0,0,0,0.1));
  transform: translateY(-3px);
}

.category-list li a .name {
  font-weight: 700;
  font-size: 1rem;
}

.category-list li a .description {
  font-size: 0.8rem;
  opacity: 0.6;
  margin-top: 0.375rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── List Page: Worksheets — Button Grid ── */
.worksheet-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
  list-style: none;
  padding: 0;
}

.worksheet-list li a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1rem;
  border: 1.5px solid var(--site-border, #e5e7eb);
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  transition: all var(--dur-fast, 150ms) ease;
}

.worksheet-list li a:hover {
  border-color: var(--site-primary, #3b82f6);
  background: var(--site-primary-light, #eff6ff);
}

/* ── SEO Components — Large 3-Column Cards ── */
.seo-components--primary {
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.seo-card {
  padding: 2rem 1.75rem;
  min-height: 180px;
  display: flex;
  flex-direction: column;
}

.seo-card p:last-child {
  margin-top: auto;
}

.seo-more-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .categories-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .seo-components--primary {
    grid-template-columns: repeat(2, 1fr);
  }
  .category-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .category-card {
    aspect-ratio: auto;
    padding: 1.5rem 1.25rem;
  }
  .seo-components--primary {
    grid-template-columns: 1fr;
  }
  .category-list {
    grid-template-columns: 1fr;
  }
}