/* ================================================================
   STORY Magazine G2 — Homepage
   Phase 4 — Homepage
   Implements: 01-HOMEPAGE.md, 10-RESPONSIVE.md, IMAGE-SYSTEM.md
   ================================================================= */

/* ----------------------------------------------------------------
   Lead / Hero
   Source: 01-HOMEPAGE.md §Lead
   Desktop: 50/50 split (black copy + media)
   Mobile: stacked, ~921 total
   ---------------------------------------------------------------- */
.story-home-lead {
  display: grid;
  background: var(--color-black);
  color: var(--color-text-inverted);
}

.story-home-lead-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 20px;
  text-align: center;
}

.story-home-lead-copy .story-meta {
  color: var(--color-text-inverted);
  opacity: 0.7;
  margin-bottom: 18px;
}

.story-home-lead-copy h1 {
  max-width: 600px;
  margin: 0 0 18px;
  font: var(--font-weight-light) 32px/36px var(--story-font);
  /* SOURCE: 01-HOMEPAGE.md §Lead
     "H1 is centred, Graphik Web 32/36/300, maximum 600px." */
}

.story-home-lead-copy h1 a {
  color: var(--color-text-inverted);
  text-decoration: none;
}

.story-home-lead-media {
  display: block;
  overflow: hidden;
  aspect-ratio: 393 / 480;
  /* SOURCE: HOMEPAGE-AUTHORITY-CONFLICT-RESOLUTION.md (C6)
     Hero media wrapper ratio map:
     393/480 base -> 1/1 @640 -> 755/892 @1280 -> 960/990 @2560.
     Image composition (object-fit/object-position) unchanged (BUG-007). */
}

.story-home-lead-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 50%;
  /* SOURCE: IMAGE-SYSTEM.md §Hero Images
     Aspect ratio ~3:2, cover crop, centred. */
}

/* ----------------------------------------------------------------
   Paired Row
   Source: 01-HOMEPAGE.md §Paired rows
   Equal zero-gutter halves.
   Desktop media ratio ~120:121.
   White text surface: 40px top, 40px sides, ~70px bottom.
   Title: 18/22/500 uppercase.
   Deck/byline: 14/16/400 uppercase.
   10px gap below title grouping.
   ---------------------------------------------------------------- */
.story-pair {
  display: grid;
  gap: 0;
}

.story-pair .story-card {
  display: grid;
}

.story-pair .story-card-media {
  display: block;
  overflow: hidden;
}

.story-pair .story-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 50%;
  aspect-ratio: 120 / 121;
  /* SOURCE: 01-HOMEPAGE.md §Paired rows
     "Desktop media ratio is approximately 120:121." */
}

.story-pair .story-card-copy {
  padding: 20px 20px 50px;
  background: var(--color-white);
  color: var(--color-text);
  /* SOURCE: 10-RESPONSIVE.md archived map (C7)
     Pair copy padding: 20/20/50 base -> 20/20/70 @640 -> 40/40/70 @1280 -> 40/40/100 @1920. */
}

.story-pair .story-card-copy .story-label {
  margin-bottom: 10px;
}

.story-pair .story-card-title {
  margin: 0 0 10px;
  font: var(--font-story-title-weight) var(--font-story-title-size)/var(--font-story-title-leading) var(--story-font);
  text-transform: var(--font-story-title-transform);
  /* SOURCE: 01-HOMEPAGE.md §Paired rows
     "Title: 18/22/500 uppercase" */
}

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

.story-pair .story-card-excerpt {
  margin: 0;
  font: var(--font-deck-weight) var(--font-deck-size)/var(--font-deck-leading) var(--story-font);
  text-transform: var(--font-deck-transform);
  color: var(--color-muted);
  /* SOURCE: 01-HOMEPAGE.md §Paired rows
     "Deck/byline: 14/16/400 uppercase" */
}

.story-pair .story-card-copy .story-meta {
  margin-top: 10px;
  color: var(--color-muted);
}

/* ----------------------------------------------------------------
   Full Feature
   Source: 01-HOMEPAGE.md §Full feature
   Full-bleed media, centred copy surface, max 1116px.
   Copy padding: 40px top, 67px bottom.
   ---------------------------------------------------------------- */
.story-feature {
  position: relative;
  /* Paint order for the homepage stacking system (stacking.js): the
     feature is the covering element over the sticky pair row above it.
     position:relative lifts it into the positioned painting layer so it
     paints above the pinned (sticky) pair without any z-index ladder. */
  text-align: center;
  background: var(--color-white);
}

.story-feature-media {
  display: block;
  overflow: hidden;
}

.story-feature-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  object-position: 50% 50%;
  /* Full-bleed; natural height driven by image aspect ratio. */
}

.story-feature-copy {
  max-width: 1116px;
  margin: 0 auto;
  padding: 20px 20px 50px;
  /* SOURCE: 10-RESPONSIVE.md archived map (C7)
     Feature copy padding: 20/20/50 base -> 20/20/67 @640 -> 40/0/67 @1280 -> 40/0/76 @1920. */
}

.story-feature-copy h2 {
  max-width: 44rem;
  margin: 0 auto 12px;
  font: var(--font-story-title-weight) var(--font-story-title-size)/var(--font-story-title-leading) var(--story-font);
  text-transform: var(--font-story-title-transform);
}

.story-feature-copy h2 a {
  color: var(--color-text);
  text-decoration: none;
}

.story-feature-copy p {
  max-width: 40rem;
  margin: 0 auto;
  font: var(--font-deck-weight) var(--font-deck-size)/var(--font-deck-leading) var(--story-font);
  text-transform: var(--font-deck-transform);
  color: var(--color-muted);
}

.story-feature-copy .story-meta {
  margin-top: 12px;
  color: var(--color-muted);
}

/* ----------------------------------------------------------------
   Closing Carousel
   Source: 01-HOMEPAGE.md §Closing carousel, 09-MOTION.md
   Desktop: 3 visible panels.
   Transform 0.5s, settled 0.3s.
   Autoplay ~3.5s.
   Prev/next from 640px.
   Pagination at all widths.
   Text occupies lower image area.
   ---------------------------------------------------------------- */
.story-carousel {
  position: relative;
  background: var(--color-black);
  color: var(--color-text-inverted);
  overflow: hidden;
}

.story-carousel-viewport {
  overflow: hidden;
}

.story-carousel-track {
  display: flex;
  transition: transform var(--duration-carousel) var(--ease-in-out);
  touch-action: pan-y;
}

.story-carousel-panel {
  position: relative;
  flex: 0 0 100%;
  height: 500px;
  overflow: hidden;
}

.story-carousel-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 50%;
}

.story-carousel-panel::after {
  content: '';
  position: absolute;
  inset: 45% 0 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.72));
  pointer-events: none;
}

.story-carousel-panel-copy {
  position: absolute;
  z-index: 1;
  left: 32px;
  right: 32px;
  bottom: 52px;
  text-align: center;
}

.story-carousel-panel-excerpt {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  margin: 8px 0 0;
  font: var(--font-deck-weight) var(--font-deck-size)/var(--font-deck-leading) var(--story-font);
  text-transform: var(--font-deck-transform);
  color: var(--color-text-inverted);
  opacity: 0.85;
}

.story-carousel-panel-copy h2 {
  margin: 0;
  font: var(--font-story-title-weight) var(--font-story-title-size)/var(--font-story-title-leading) var(--story-font);
  text-transform: var(--font-story-title-transform);
}

.story-carousel-panel-copy h2 a {
  color: var(--color-text-inverted);
  text-decoration: none;
}

/* Carousel controls */
.story-carousel > button {
  position: absolute;
  z-index: 2;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-text-inverted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: none;
  /* Hidden below 640px per 01-HOMEPAGE.md */
}

.story-carousel > button:focus-visible {
  outline: 2px solid var(--color-text-inverted);
  outline-offset: 2px;
}

.story-carousel [data-prev] {
  left: 8px;
}

.story-carousel [data-next] {
  right: 8px;
}

/* Pagination */
.story-carousel-pagination {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.story-carousel-pagination button {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
}

.story-carousel-pagination button[aria-current="true"] {
  background: rgba(255, 255, 255, 0.9);
}

.story-carousel-pagination button:focus-visible {
  outline: 2px solid var(--color-text-inverted);
  outline-offset: 2px;
}

/* ----------------------------------------------------------------
   Responsive
   ---------------------------------------------------------------- */

/* Tablet: paired rows split, feature aspect shifts, carousel controls appear */
@media (min-width: 640px) {
  .story-pair {
    grid-template-columns: 1fr 1fr;
  }

  .story-pair .story-card-copy {
    padding: 20px 20px 70px;
  }

  .story-feature-media img {
    aspect-ratio: 16 / 10;
  }

  .story-feature-copy {
    padding: 20px 20px 67px;
  }

  .story-home-lead-media {
    aspect-ratio: 1 / 1;
  }

  .story-carousel-panel {
    flex-basis: 69%;
    height: 650px;
  }

  .story-carousel > button {
    display: block;
  }
}

/* Small desktop: lead splits, feature becomes 3:2, carousel widens */
@media (min-width: 1024px) {
  .story-home-lead {
    grid-template-columns: 1fr 1fr;
    min-height: clamp(700px, 58vw, 842px);
    /* SOURCE: 01-HOMEPAGE.md §Geometry
       Lead splits at 1024. */
  }

  .story-home-lead-copy {
    padding: 64px 40px;
  }

  .story-home-lead-media {
    align-self: start;
    /* C6: media wrapper height is ratio-driven (1/1 from 1024 to 1279);
       container geometry only - image fit/composition untouched (BUG-007). */
  }

  .story-feature-media img {
    aspect-ratio: 3 / 2;
  }

  .story-carousel-panel {
    flex-basis: 762px;
    height: 910px;
    /* SOURCE: 01-HOMEPAGE.md §Geometry
       Carousel 910px at 1440. */
  }
}

/* Small desktop+: carousel slide fixed 762px wide, 910px tall (D1/D2) */
@media (min-width: 1280px) {
  .story-carousel-panel {
    flex-basis: 762px;
    height: 910px;
  }

  .story-home-lead-media {
    aspect-ratio: 755 / 892;
  }

  .story-pair .story-card-copy {
    padding: 40px 40px 70px;
  }

  .story-feature-copy {
    padding: 40px 0 67px;
  }

  .story-carousel-pagination {
    bottom: 81px;
    /* SOURCE: 10-RESPONSIVE.md
       "carousel pagination bottom becomes 81px at 1920" */
  }
}

/* Large desktop: lead copy padding increases */
@media (min-width: 1440px) {
  .story-home-lead-copy {
    padding: 64px 64px;
  }
}

/* Desktop: H1 64/64/300 max 655; carousel viewport-height minus footer (D2/D3) */
@media (min-width: 1920px) {
  .story-home-lead-copy h1 {
    max-width: 655px;
    font: var(--font-weight-light) 64px/64px var(--story-font);
    /* SOURCE: HOMEPAGE-RUNTIME-FORENSICS-v2 §4 Hero contract
       H1 is 64/64/300, maximum 655px from 1920. */
  }

  .story-pair .story-card-copy {
    padding: 40px 40px 100px;
  }

  .story-feature-copy {
    padding: 40px 0 76px;
  }

  .story-carousel-panel {
    height: calc(100vh - var(--bottom-nav-height-desktop));
    /* SOURCE: 01-HOMEPAGE.md §Geometry
       "Carousel height remains calc(100vh - 90px)" at 1920. */
  }
}

/* Ultra-wide: hero media wrapper 960/990 (C6 archived ratio map) */
@media (min-width: 2560px) {
  .story-home-lead-media {
    aspect-ratio: 960 / 990;
  }
}

/* ----------------------------------------------------------------
   Print
   ---------------------------------------------------------------- */
@media print {
  .story-carousel {
    display: none;
  }
}