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

/* ==========================================================
   LAYOUT: Magazine — Editorial Multi-Column
   ==========================================================
   Visual: Large featured cards alternating with smaller cards,
   like a magazine editorial spread. First category gets hero
   treatment (2-col span). List pages use 2-column cards.
   SEO area stacks full-width for readability.
   Print preview cards use clean white frames, print-paper look.
   ========================================================== */

/* ── Homepage: Hero Section ── */
.hero {
  text-align: left;
  padding: 5rem 3rem 4rem;
}

.hero h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.25rem);
  max-width: 720px;
}

.hero .subtitle {
  text-align: left;
  margin-left: 0;
  max-width: 580px;
}

/* ── Homepage: Categories — Magazine Grid ── */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* Featured card: first, fourth, seventh — span 2 cols */
.category-card:nth-child(3n+1) {
  grid-column: span 2;
}

.category-card:nth-child(3n+1) h3 {
  font-size: 1.375rem;
}

.category-card:nth-child(3n+1) .category-icon {
  font-size: 2.75rem;
}

.category-card:nth-child(3n+1) p {
  font-size: 1rem;
}

/* ── Homepage: Intro Section ── */
.intro-section {
  text-align: left;
  border-left: 4px solid var(--site-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding-left: 2rem;
  background: var(--site-primary-light);
}

/* ── List Page: Subcategories — 2-Column Editorial Cards ── */
.category-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  list-style: none;
  padding: 0;
}

.category-list li:first-child {
  grid-column: 1 / -1;
}

.category-list li:first-child a {
  padding: 1.5rem 2rem;
  font-size: 1.1rem;
}

/* ── List Page: Worksheets — Horizontal Cards ── */
.worksheet-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  list-style: none;
  padding: 0;
}

/* ── SEO Components — Full-Width Stacked ── */
.seo-components--primary {
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.seo-card {
  padding: 2rem 2.5rem;
}

.seo-card:nth-child(even) {
  background: var(--site-primary-light);
}

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

/* ── Responsive ── */
@media (max-width: 1024px) {
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .category-card:nth-child(3n+1) {
    grid-column: span 1;
  }
  .category-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .categories-grid {
    grid-template-columns: 1fr;
  }
  .hero {
    padding: 3.5rem 1.5rem 3rem;
  }
  .seo-more-grid {
    grid-template-columns: 1fr;
  }
}


/**
 * Site-Specific Custom Styles (Layer 5)
 * =====================================
 *
 * This is the 5th and final layer in the CSS cascade:
 *
 * 1. main.css           → Platform base (header, footer, buttons)
 * 2. base-structure.css → Page layout (grids, sections, cards)
 * 3. tokens.css         → Design tokens (colors, spacing, typography)
 * 4. skin.css           → Theme skin (gradients, shadows, effects)
 * 5. site.css           → Site-specific customization (THIS FILE)
 *
 * THIS FILE HAS TWO SECTIONS:
 * ────────────────────────────────────────────────────────────
 *
 * Section A:  LAYOUT VARIANT CSS
 *   Loaded from design-system/layouts/<layout>/site-layout.css
 *   during cloning (Phase 5). Defines homepage grid, category page,
 *   and SEO component structures unique to each layout type.
 *
 * Section B:  CONTENT-TYPE-SPECIFIC STYLES
 *   Manually added per site for science print content rendering.
 *   Print preview cards, diagram containers, chart areas, data tables.
 */

/* ==========================================================
   Section A: LAYOUT VARIANT CSS
   ==========================================================
   AUTO-GENERATED — Do not edit manually.
   Layout: magazine
   Source: design-system/layouts/magazine/site-layout.css
   ========================================================== */

/* (Defined above — magazine layout variant) */


/* ==========================================================
   Section B: CONTENT-TYPE-SPECIFIC STYLES
   ==========================================================
   Science print materials: charts, diagrams, worksheets,
   periodic table, data tables, reference sheets.
   ========================================================== */

/* ── Print Preview Card — "print-paper" look ──
 * Mimics an actual sheet of paper sitting on a desk.
 * Clean white frame, soft teal shadow, elegant.
 */
.print-preview-card {
  background: #ffffff;
  border: 1px solid var(--site-border-medium);
  border-radius: var(--radius-md);
  box-shadow:
    0 1px 3px rgba(15, 118, 110, 0.06),
    0 8px 24px rgba(15, 118, 110, 0.08),
    0 0 0 1px rgba(15, 118, 110, 0.04);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--dur-normal) var(--ease-default),
              transform var(--dur-normal) var(--ease-default);
}

.print-preview-card:hover {
  box-shadow:
    0 4px 8px rgba(15, 118, 110, 0.10),
    0 16px 40px rgba(15, 118, 110, 0.12),
    0 0 0 1px rgba(15, 118, 110, 0.08);
  transform: translateY(-2px);
}

/* Teal top rule — academic authority */
.print-preview-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-hero-band);
}

/* Print button overlay on preview cards */
.print-preview-card .print-btn-overlay {
  position: absolute;
  top: 1rem;
  right: 1rem;
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-default);
}

.print-preview-card:hover .print-btn-overlay {
  opacity: 1;
}

/* ── Science Diagram Container ── */
.diagram-container {
  background: var(--site-surface-raised);
  border: 1px solid var(--site-border-medium);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  position: relative;
}

.diagram-container figcaption {
  font-size: 0.8rem;
  color: var(--site-text-muted);
  margin-top: 0.75rem;
  font-style: italic;
}

/* ── Data Table — Science-grade precision ── */
.science-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  font-family: var(--font-body);
}

.science-table th {
  background: var(--site-primary);
  color: var(--site-text-inverse);
  font-weight: 700;
  font-family: var(--font-heading);
  padding: 0.625rem 0.875rem;
  text-align: left;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.science-table td {
  padding: 0.5rem 0.875rem;
  border-bottom: 1px solid var(--site-border);
  color: var(--site-text);
  vertical-align: middle;
}

.science-table tr:nth-child(even) td {
  background: var(--site-primary-light);
}

.science-table tr:hover td {
  background: var(--site-background-alt);
}

/* ── Periodic Table Cell ── */
.element-cell {
  background: var(--site-surface-raised);
  border: 1px solid var(--site-border-medium);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.3rem;
  text-align: center;
  font-size: 0.7rem;
  transition: background var(--dur-fast) var(--ease-default),
              border-color var(--dur-fast) var(--ease-default);
  cursor: default;
}

.element-cell:hover {
  background: var(--site-primary-light);
  border-color: var(--site-primary);
}

.element-symbol {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--site-text-primary);
  font-family: var(--font-heading);
  line-height: 1;
}

.element-number {
  display: block;
  font-size: 0.65rem;
  color: var(--site-text-muted);
  margin-bottom: 0.1rem;
}

.element-name {
  display: block;
  font-size: 0.6rem;
  color: var(--site-text-muted);
}

/* Element categories by background */
.element-cell.alkali-metal      { border-top: 3px solid #ef4444; }
.element-cell.alkaline-earth    { border-top: 3px solid #f97316; }
.element-cell.transition-metal  { border-top: 3px solid #eab308; }
.element-cell.post-trans-metal  { border-top: 3px solid #84cc16; }
.element-cell.metalloid         { border-top: 3px solid #22c55e; }
.element-cell.nonmetal          { border-top: 3px solid #14b8a6; }
.element-cell.noble-gas         { border-top: 3px solid var(--site-primary); }
.element-cell.lanthanide        { border-top: 3px solid #8b5cf6; }
.element-cell.actinide          { border-top: 3px solid #ec4899; }

/* ── Science Chart Container ── */
.chart-container {
  background: var(--site-surface-raised);
  border: 1px solid var(--site-border-medium);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.chart-container .chart-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--site-text-primary);
  font-family: var(--font-heading);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

/* ── Reference Sheet Layout ── */
.reference-sheet {
  background: var(--site-surface-raised);
  border: 1px solid var(--site-border-medium);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.reference-sheet-header {
  background: var(--site-primary);
  color: var(--site-text-inverse);
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.reference-sheet-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-heading);
  margin: 0;
  letter-spacing: 0.01em;
}

.reference-sheet-body {
  padding: 1.25rem;
}

/* ── Science Formula Block ── */
.formula-block {
  background: var(--site-primary-light);
  border: 1px solid var(--site-border-medium);
  border-left: 4px solid var(--site-primary);
  border-radius: var(--radius-md);
  padding: 0.875rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--site-text-primary);
  margin: 0.75rem 0;
}

.formula-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--site-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
  display: block;
}

/* ── Science Units / Label Strip ── */
.unit-label {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  color: var(--site-primary-dark);
  background: var(--site-primary-light);
  border: 1px solid var(--site-border-medium);
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
}

/* ── Print-specific science overrides ── */
@media print {
  /* Print preview cards look like actual printed sheets */
  .print-preview-card {
    border: 1pt solid #999;
    border-radius: 0;
    box-shadow: none !important;
    background: #fff !important;
  }
  .print-preview-card::before { display: none; }

  /* Science tables print cleanly */
  .science-table th {
    background: #000 !important;
    color: #fff !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .science-table td { border-bottom: 0.5pt solid #ccc; }
  .science-table tr:nth-child(even) td { background: #f8f8f8 !important; }

  /* Diagrams and charts */
  .diagram-container,
  .chart-container,
  .reference-sheet {
    border: 1pt solid #999;
    border-radius: 0;
    box-shadow: none !important;
    background: #fff !important;
  }

  .reference-sheet-header {
    background: #000 !important;
    color: #fff !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  /* Formulas preserve mono font */
  .formula-block {
    border: 1pt solid #999;
    border-left: 2pt solid #333;
    border-radius: 0;
    background: #f8f8f8 !important;
    font-size: 10pt;
  }

  /* Element cells */
  .element-cell {
    border: 0.5pt solid #999;
    border-radius: 0;
    background: #fff !important;
  }
  .element-cell [class$="-metal"],
  .element-cell [class$="-gas"],
  .element-cell.nonmetal,
  .element-cell.metalloid,
  .element-cell.lanthanide,
  .element-cell.actinide {
    border-top: 2pt solid #333 !important;
  }
}