/*
 * Curated Homepage Styles
 * Feature: 002-curated-homepage
 *
 * Sections:
 * 1. CSS Custom Properties (extends PaperMod variables)
 * 2. Hero Section (featured posts)
 * 3. Category Sections
 * 4. Timeline Section
 * 5. Responsive Breakpoints
 * 6. Dark Mode Overrides
 * 7. Animations & Transitions
 */

/* ==========================================================================
   1. CSS Custom Properties
   ========================================================================== */

:root {
  /* Curated homepage spacing */
  --curated-section-gap: 4rem;
  --curated-card-gap: 1.5rem;
  --curated-content-padding: 1.25rem;

  /* Typography scale (relative to theme base) */
  --curated-hero-title-size: 2rem;
  --curated-hero-title-weight: 700;
  --curated-section-title-size: 1.5rem;
  --curated-card-title-size: 1.125rem;
  --curated-meta-size: 0.875rem;

  /* Card styling */
  --curated-card-radius: var(--radius);
  --curated-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --curated-card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.12);
}

/* ==========================================================================
   Base Card Styles (shared across all sections)
   ========================================================================== */

.curated-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--entry);
  border-radius: var(--curated-card-radius);
  overflow: hidden;
  box-shadow: var(--curated-card-shadow);
}

.curated-card-image {
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.curated-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.curated-card:hover .curated-card-image img {
  transform: scale(1.02);
}

.curated-card-content {
  padding: var(--curated-content-padding);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.curated-card-categories {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.curated-category-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary);
  text-decoration: none;
  font-weight: 500;
}

.curated-category-tag:hover {
  color: var(--primary);
}

.curated-card-title {
  font-size: var(--curated-card-title-size);
  font-weight: 600;
  line-height: 1.3;
  margin: 0;
}

.curated-card-title a {
  color: var(--primary);
  text-decoration: none;
}

.curated-card-excerpt {
  color: var(--secondary);
  font-size: var(--curated-meta-size);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.curated-card-meta {
  font-size: var(--curated-meta-size);
  color: var(--secondary);
  margin-top: auto;
}

/* Full-card clickable overlay */
.curated-card-link {
  position: absolute;
  inset: 0;
  z-index: 1;
}

/* Ensure category links are clickable above overlay */
.curated-category-tag {
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   2. Hero Section
   ========================================================================== */

.curated-hero-section {
  margin-bottom: var(--curated-section-gap);
}

/* Adaptive grid based on number of posts */
.curated-hero-grid {
  display: grid;
  gap: var(--curated-card-gap);
}

/* Single hero - full width */
.curated-hero-grid-1 {
  grid-template-columns: 1fr;
}

/* Two heroes - primary larger, secondary smaller */
.curated-hero-grid-2 {
  grid-template-columns: 1.5fr 1fr;
}

/* Three heroes - primary spans full width top, two secondaries below */
.curated-hero-grid-3 {
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto;
}

.curated-hero-grid-3 .hero-card-primary {
  grid-column: 1 / -1;
}

/* Hero card enhancements */
.hero-card {
  border: 1px solid var(--border);
}

.hero-card-primary .hero-image {
  aspect-ratio: 21 / 9;
}

.hero-card-secondary .hero-image {
  aspect-ratio: 16 / 9;
}

/* Hero typography */
.hero-card-primary .hero-title {
  font-size: var(--curated-hero-title-size);
  font-weight: var(--curated-hero-title-weight);
  line-height: 1.2;
}

.hero-card-secondary .hero-title {
  font-size: 1.375rem;
  font-weight: 600;
}

.hero-card-primary .hero-excerpt {
  font-size: 1rem;
  -webkit-line-clamp: 4;
}

.hero-card-secondary .hero-excerpt {
  font-size: var(--curated-meta-size);
  -webkit-line-clamp: 2;
}

.hero-content {
  padding: 1.5rem;
  gap: 0.75rem;
}

/* ==========================================================================
   3. Category Sections
   ========================================================================== */

.curated-category-section {
  margin-bottom: var(--curated-section-gap);
}

.curated-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.curated-section-title {
  font-size: var(--curated-section-title-size);
  font-weight: 600;
  margin: 0;
  color: var(--primary);
}

.curated-view-all {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--curated-meta-size);
  color: var(--secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease;
}

.curated-view-all:hover {
  color: var(--primary);
}

.curated-view-all svg {
  transition: transform 0.15s ease;
}

.curated-view-all:hover svg {
  transform: translateX(2px);
}

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

/* Category grid layouts */
.curated-category-grid {
  display: grid;
  gap: var(--curated-card-gap);
}

/* Single post - don't stretch awkwardly */
.curated-category-grid-1 {
  grid-template-columns: minmax(0, 400px);
}

/* 2 posts - side by side */
.curated-category-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

/* 3+ posts - 3-column grid */
.curated-category-grid-3,
.curated-category-grid-4 {
  grid-template-columns: repeat(3, 1fr);
}

/* Category card styling */
.category-card {
  border: 1px solid var(--border);
}

.category-image {
  aspect-ratio: 16 / 10;
}

.category-content {
  padding: 1rem;
}

.category-title {
  font-size: var(--curated-card-title-size);
}

.category-excerpt {
  -webkit-line-clamp: 2;
}

/* ==========================================================================
   4. Timeline Section
   ========================================================================== */

.curated-timeline-section {
  margin-bottom: var(--curated-section-gap);
}

.curated-timeline-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Timeline card - horizontal layout */
.timeline-card {
  flex-direction: row;
  align-items: stretch;
  border: 1px solid var(--border);
}

.timeline-image {
  flex-shrink: 0;
  width: 200px;
  aspect-ratio: 16 / 10;
}

.timeline-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.25rem 1.5rem;
  gap: 0.5rem;
}

.timeline-title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
}

.timeline-excerpt {
  font-size: 0.875rem;
  color: var(--secondary);
  line-height: 1.5;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.timeline-meta {
  font-size: 0.8125rem;
  margin-top: auto;
}

/* ==========================================================================
   5. Responsive Breakpoints
   ========================================================================== */

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) {
  :root {
    --curated-hero-title-size: 1.75rem;
    --curated-section-title-size: 1.375rem;
    --curated-section-gap: 3rem;
  }

  /* Stack hero grid on tablet */
  .curated-hero-grid-2 {
    grid-template-columns: 1fr;
  }

  .curated-hero-grid-3 {
    grid-template-columns: 1fr;
  }

  .curated-hero-grid-3 .hero-card-primary {
    grid-column: auto;
  }

  .hero-card-primary .hero-image {
    aspect-ratio: 16 / 9;
  }

  /* Category grids on tablet - 2 columns max */
  .curated-category-grid-3,
  .curated-category-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
  :root {
    --curated-hero-title-size: 1.5rem;
    --curated-section-title-size: 1.25rem;
    --curated-card-title-size: 1rem;
    --curated-section-gap: 2.5rem;
    --curated-card-gap: 1rem;
    --curated-content-padding: 1rem;
  }

  .hero-content {
    padding: 1rem;
  }

  .hero-card-primary .hero-excerpt,
  .hero-card-secondary .hero-excerpt {
    -webkit-line-clamp: 2;
    font-size: var(--curated-meta-size);
  }

  /* Category grids on mobile - single column */
  .curated-category-grid-1,
  .curated-category-grid-2,
  .curated-category-grid-3,
  .curated-category-grid-4 {
    grid-template-columns: 1fr;
  }

  .curated-section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  /* Timeline cards on mobile - stack vertically */
  .timeline-card {
    flex-direction: column;
  }

  .timeline-image {
    width: 100%;
  }

  .timeline-content {
    padding: 0.875rem 1rem;
  }
}

/* ==========================================================================
   6. Dark Mode Overrides
   ========================================================================== */

.dark {
  --curated-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --curated-card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.dark .curated-card {
  background: var(--entry);
  border-color: var(--border);
}

.dark .hero-card {
  border-color: var(--border);
}

/* ==========================================================================
   7. Animations & Transitions
   ========================================================================== */

/* Card hover effects */
.curated-card {
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.curated-card:hover {
  box-shadow: var(--curated-card-shadow-hover);
}

/* Title link hover */
.curated-card-title a {
  transition: color 0.15s ease;
}

.curated-card-title a:hover {
  color: var(--secondary);
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .curated-card,
  .curated-card-image img,
  .curated-card-title a {
    transition: none;
  }

  .curated-card:hover .curated-card-image img {
    transform: none;
  }
}