/* ================================================================
   FRONT PAGE — 4 sticky scroll chapters
   Depends on: layout.css, typography.css
================================================================ */

/* ── GeneratePress adds padding-top on body for fixed header.
      On the homepage the first chapter must start at top: 0.   */
body.home {
  padding-top: 0 !important;
}

/* ── Post-chapters: Brand statement (video + copy) ───────────── */
.home-brand {
  padding-block: var(--section-pad-lg);
}

.home-brand__inner {
  align-items: center;
}

.home-brand__video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: rgba(7, 53, 86, 0.03);
  border: var(--border-width) solid var(--border-standard);
}

.home-brand__video iframe,
.home-brand__video video {
  width: 100%;
  height: 100%;
  display: block;
}

.home-brand__copy {
  max-width: none;
}

.home-brand__title {
  font-size: var(--text-2xl);
  color: var(--text-heading);
  font-weight: var(--weight-regular);
  -webkit-font-smoothing: auto;
  -moz-osx-font-smoothing: auto;
  margin-bottom: var(--space-4);
}

.home-brand__text {
  color: var(--text-primary);
  font-size: var(--text-md);
}

/* ── Distance row (blue) ─────────────────────────────────────── */
.home-distances {
  background-color: var(--bg-dark-secondary);
  color: var(--text-on-dark-primary);
  padding-block: var(--space-20);
}

.home-distances__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-12);
}

.home-distances__row {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.dist-item {
  display: grid;
  grid-template-columns: auto auto;
  column-gap: 6px;
  row-gap: 2px;
  align-items: baseline;
}

.dist-num {
  grid-column: 1;
  font-family: var(--font-display);
  font-size: var(--text-stat);
  line-height: 1;
  color: var(--text-on-dark);
  -webkit-font-smoothing: auto;
  -moz-osx-font-smoothing: auto;
}

.dist-unit {
  grid-column: 2;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-on-dark-subtle);
}

.dist-place {
  grid-column: 1 / -1;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
}

.dist-sep {
  width: 1px;
  height: 54px;
  background-color: var(--border-on-dark);
  opacity: 0.75;
}

.home-distances__cta {
  flex-shrink: 0;
}

@media (max-width: 1024px) {
  .home-distances__inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .dist-sep { display: none; }
}

/* ── Chapters wrapper ────────────────────────────────────────── */
.home-chapters {
  position: relative;
}

/* ── Chapter outer — scroll space + clip ─────────────────────── */
.chapter {
  position: relative;
  height: 200vh;
  overflow: clip; /* clips visually but does NOT break position:sticky */
}

/* ── Background image — absolute, taller than viewport ───────── */
.chapter__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%; /* avoid excessive crop/zoom on cover images */
  z-index: 0;
}

.chapter__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  position: relative;
  z-index: 0;
}

/* ── Gradient overlay ────────────────────────────────────────── */
.chapter__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.chapter__overlay--left {
  background: var(--bg-overlay-panel);
}

.chapter__overlay--right {
  background:
    linear-gradient(
      to left,
      rgba(19, 24, 31, .82)  0%,
      rgba(19, 24, 31, .55) 28%,
      rgba(19, 24, 31, .18) 58%,
      rgba(19, 24, 31, .00) 100%
    ),
    linear-gradient(
      to top,
      rgba(19, 24, 31, .45)  0%,
      rgba(19, 24, 31, .00) 45%
    );
}

/* ── Sticky text panel ───────────────────────────────────────── */
.chapter__panel {
  position: sticky;
  top: var(--panel-sticky-top); /* 22vh — from design tokens */
  width: min(620px, calc(100% - var(--gutter) * 2));
  z-index: 2;
  /* entrance animation */
  opacity: 0;
  transform: translateY(var(--panel-offset-y));
  transition:
    opacity  var(--duration-reveal) var(--ease-default),
    transform var(--duration-reveal) var(--ease-default);
}

.chapter__panel.visible {
  opacity: 1;
  transform: translateY(0);
}

.chapter__panel--left  { margin-left: 8%; }
.chapter__panel--right { margin-left: auto; margin-right: 8%; }

/* ── Panel inner ─────────────────────────────────────────────── */
.chapter__panel-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding-block: 120px;
}

/* ── Right panel: align all items to the right ───────────────── */
.chapter__panel--right .chapter__panel-inner {
  align-items: flex-end;
  text-align: right;
}

/* ── Left panel: prevent flex stretch (CTA underline fits text) ─ */
.chapter__panel--left .chapter__panel-inner {
  align-items: flex-start;
  text-align: left;
}

/* ── Decorative chapter number ───────────────────────────────── */
.chapter__ui {
  position: absolute;
  inset: 0;
  height: 100%;
  z-index: 3;
  pointer-events: none;
}

.chapter__ui-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
}

.chapter__ui-frame {
  position: relative;
  height: 100%;
}

.chapter__num {
  position: absolute;
  right: var(--gutter);
  bottom: var(--space-12);
  font-family: var(--font-display);
  font-size: 12rem;
  font-weight: var(--weight-regular);
  color: rgba(255, 255, 255, 0.14);
  line-height: 1;
  user-select: none;
  -webkit-font-smoothing: auto;
  -moz-osx-font-smoothing: auto;
}

/* If the text panel is on the right, place the number on the left */
.chapter--panel-right .chapter__num {
  left: var(--gutter);
  right: auto;
}

/* ── Scroll hint (first chapter only) ───────────────────────── */
.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: var(--space-12);
  transform: translateX(-50%);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(239, 239, 239, .5), transparent);
  animation: scroll-down 2s ease-in-out infinite;
}

@keyframes scroll-down {
  0%   { transform: scaleY(0); transform-origin: top;    }
  50%  { transform: scaleY(1); transform-origin: top;    }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ── Responsive ──────────────────────────────────────────────── */

@media (max-width: 1024px) {
  .chapter__panel { width: min(480px, calc(100% - var(--gutter-md) * 2)); }
  .chapter__panel--left  { margin-left: 6%; }
  .chapter__panel--right { margin-right: 6%; }
}

@media (max-width: 768px) {
  body.home { padding-top: 0 !important; }

  .chapter {
    height: 100svh;
    overflow: clip;
  }

  .chapter__panel {
    position: absolute;
    top: auto;
    bottom: var(--space-12);
    width: calc(100% - var(--gutter-sm) * 2);
    margin-left: var(--gutter-sm) !important;
    margin-right: var(--gutter-sm) !important;
    opacity: 1;
    transform: none;
  }

  .chapter__panel-inner { padding-block: 0; gap: var(--space-4); }

  .chapter__panel--right .chapter-subtitle,
  .chapter__panel--right .btn-text {
    align-self: flex-start;
    text-align: left;
  }

  .chapter__overlay--left,
  .chapter__overlay--right {
    background:
      linear-gradient(
        to top,
        rgba(19, 24, 31, .90)  0%,
        rgba(19, 24, 31, .40) 45%,
        transparent 75%
      );
  }

  .chapter__num { display: none; }
  .scroll-hint  { display: none; }
}