/* ─── Header / nav ─────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: transparent;
  transition: all 0.4s var(--ease-out);
}
.site-header:not(.is-scrolled) .brand__logo--on-light { display: none; }
.site-header:not(.is-scrolled) .brand__logo--on-dark { display: block; filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4)); }
@media (min-width: 861px) {
  .site-header:not(.is-scrolled) .site-nav a { color: #fff; text-shadow: 0 2px 12px rgba(0,0,0,0.7); }
  .site-header:not(.is-scrolled) .site-nav a:hover { color: #fff; text-shadow: 0 2px 16px rgba(0,0,0,0.9); }
}
.site-header:not(.is-scrolled) .nav-toggle { color: #fff; filter: drop-shadow(0 2px 8px rgba(0,0,0,0.6)); }

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(13,31,36,0.08), 0 4px 30px rgba(0,0,0,0.05);
  transform: translateZ(0);
}
.site-header.is-scrolled .brand__logo--on-light { display: block; }
.site-header.is-scrolled .brand__logo--on-dark { display: none; }

/* Handle mobile compact logo inversion when transparent */
.site-header:not(.is-scrolled) .brand__logo--compact.brand__logo--on-light {
  display: block;
  filter: brightness(0) invert(1);
}

/* ─── Mobile Nav Open State ─── */
.site-header.nav-is-open {
  background: var(--color-bg) !important;
  backdrop-filter: none !important;
  box-shadow: none !important;
}
.site-header.nav-is-open .brand__logo--on-light { display: block !important; filter: none !important; }
.site-header.nav-is-open .brand__logo--on-dark { display: none !important; }
.site-header.nav-is-open .nav-toggle { color: var(--color-text) !important; filter: none !important; }
.site-header.is-hidden {
  transform: translateY(-100%);
}
.site-header__inner {
  display: flex; align-items: center; gap: var(--space-8);
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--grid-margin);
}
.brand {
  display: inline-flex; align-items: center;
  flex-shrink: 0;
  line-height: 1;
}
.brand__logo--full {
  height: 40px; width: auto; display: block;
}
.brand__logo--compact {
  display: none;
  height: 32px; width: auto;
}
.site-nav {
  display: flex; gap: var(--space-8);
  margin-left: var(--space-8);
  flex: 1;
}
.site-nav a {
  font-family: var(--font-jakarta);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: 8px 0;
}
.site-nav a:hover { color: var(--color-text); }
.site-nav a.is-active { color: var(--color-primary); }
.site-nav a.is-active::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 2px; background: var(--color-primary);
  border-radius: 2px;
}
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  flex-direction: column;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text);
  flex-shrink: 0;
}
.nav-toggle span {
  display: block; width: 22px; height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 220ms var(--ease-out), opacity 220ms var(--ease-out);
}
.nav-toggle span + span { margin-top: 4px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ─── Buttons — classic shift hover ────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-3);
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  font-family: var(--font-jakarta);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: background var(--duration-normal) var(--ease-out),
              color var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(29, 158, 117, 0.32);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(0.985); transition-duration: 80ms; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  box-shadow: 0 6px 18px rgba(29, 158, 117, 0.22);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  box-shadow: 0 10px 26px rgba(29, 158, 117, 0.30);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  box-shadow: 0 6px 18px rgba(255, 200, 80, 0.30);
}
.btn-accent:hover {
  background: var(--color-accent-hover);
  color: var(--color-text-on-accent);
  box-shadow: 0 10px 26px rgba(255, 200, 80, 0.36);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border-strong);
}
.btn-outline:hover {
  background: var(--color-surface);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline-light {
  background: rgba(255,255,255,0.10);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.45);
  backdrop-filter: blur(8px);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.20);
  color: #fff;
  border-color: #fff;
}

.btn-lg { padding: 17px 32px; font-size: 1rem; }
.btn-sm { padding: 9px 18px; font-size: 0.8125rem; }

.btn .material-symbols-outlined {
  font-size: 1.15em;
  transition: transform var(--duration-fast) var(--ease-out);
}
.btn:hover .material-symbols-outlined { transform: translateX(4px); }

/* ─── Tags / chips ─────────────────────────────────────────── */
.tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-muted);
  color: var(--color-primary);
  font-family: var(--font-jakarta);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.tag--accent { background: var(--color-accent-light); color: var(--color-accent-deep); }
.tag--secondary { background: var(--color-secondary-muted); color: var(--color-secondary); }
.tag--anchor { background: var(--color-bg-alt); color: var(--color-text); }

/* ─── See-all link — animated underline draw ───────────────── */
.see-all {
  position: relative;
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-jakarta);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  padding: 4px 0;
}
.see-all::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: currentColor;
  transform-origin: right center;
  transform: scaleX(0);
  transition: transform 480ms var(--ease-out);
}
.see-all:hover { color: var(--color-primary); }
.see-all:hover::after {
  transform-origin: left center;
  transform: scaleX(1);
}
.see-all .material-symbols-outlined {
  font-size: 18px;
  transition: transform 420ms var(--ease-out);
}
.see-all:hover .material-symbols-outlined { transform: translateX(5px); }

/* ─── Trip / destination card ──────────────────────────────── */
.trip-card {
  position: relative;
  display: block;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: var(--color-anchor);
  box-shadow: var(--shadow-card);
  /* Each card lives on its own GPU layer + paint-contained so
     vertical Lenis scroll just translates a cached texture instead
     of re-rasterizing card content per frame. */
  /* GPU layer promotion + sub-pixel rounding fix. This prevents card
     vibration during smooth vertical scroll by keeping the item on its
     own compositor layer without containment clipping. */
  transform: translateZ(0);
  backface-visibility: hidden;
}
/* Hover feedback ring — opacity-only transition on a pseudo-element,
   contained by the card's GPU layer. Opacity transitions are GPU-
   composited and don't cause repaints of the underlying photo, so
   feedback is clear without reintroducing scroll jitter. */
.trip-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow:
    inset 0 0 0 2px rgba(29, 158, 117, 0.85),
    inset 0 -90px 90px -20px rgba(29, 158, 117, 0.18);
  opacity: 0;
  transition: opacity 220ms var(--ease-out);
  pointer-events: none;
  z-index: 3;
}
.trip-card:hover::after { opacity: 1; }
.trip-card:hover {
  /* Box-shadow can transition (layer property) but transform stays
     untouched — that's what was forcing a re-raster every frame
     while the page scrolled past. Color inherit keeps link colour. */
  box-shadow: var(--shadow-card-hover);
  color: inherit;
}
/* Slide the "Open guide" arrow on hover — a tiny isolated paint area
   that doesn't disturb the rest of the card. */
.trip-card:hover .trip-card__pin .material-symbols-outlined {
  transform: translateX(3px);
}
.trip-card .trip-card__pin .material-symbols-outlined {
  transition: transform 220ms var(--ease-out);
}
.trip-card__img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  /* No transform/transition — scaling on hover was an armed
     transition that kept the layer hot during scroll. */
}
.trip-card__overlay {
  position: absolute; inset: 0;
  /* Stronger bottom-up gradient + base tint for better text contrast
     across all photo brightness levels. */
  background: linear-gradient(180deg, 
    rgba(10, 38, 32, 0.05) 0%, 
    rgba(10, 38, 32, 0.35) 60%, 
    rgba(10, 38, 32, 0.85) 100%);
  transition: opacity 300ms var(--ease-out);
}
.trip-card__content {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: var(--space-6);
  color: #fff;
  text-shadow: 0 1px 4px rgba(0,0,0,0.25);
  z-index: 2;
}
.trip-card__name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.625rem;
  line-height: 1.1;
  margin-bottom: 4px;
}
.trip-card__region {
  font-family: var(--font-jakarta);
  font-size: 0.875rem;
  color: rgba(255,255,255,0.78);
}
.trip-card__pin {
  display: inline-flex; align-items: center; gap: 4px;
  margin-top: var(--space-3);
  font-family: var(--font-jakarta);
  font-size: var(--text-body-sm);
  color: var(--color-accent);
  font-weight: 600;
}
.trip-card__pin .material-symbols-outlined { font-size: 16px; }

/* ─── Theme card — clean border + tint hover ──────────────── */
.theme-card {
  display: flex; align-items: center; gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}
@media (max-width: 600px) {
  .theme-card { 
    flex-direction: column; 
    align-items: flex-start; 
    padding: var(--space-6) var(--space-5); 
    min-height: 180px;
  }
}
.theme-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  color: inherit;
}
.theme-card__icon {
  transition: background var(--duration-normal) var(--ease-out), color var(--duration-normal) var(--ease-out);
}
.theme-card:hover .theme-card__icon {
  background: var(--color-primary);
  color: #fff;
}
.theme-card__icon {
  width: 48px; height: 48px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-muted);
  color: var(--color-primary);
  flex-shrink: 0;
}
.theme-card__icon .material-symbols-outlined { font-size: 24px; }
.theme-card__icon--accent { background: var(--color-accent-light); color: var(--color-accent-deep); }
.theme-card__icon--sea    { background: var(--color-secondary-muted); color: var(--color-secondary); }
.theme-card__icon--anchor { background: var(--color-bg-alt); color: var(--color-text); }
.theme-card__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.0625rem;
  margin-bottom: 2px;
}
.theme-card__desc {
  font-family: var(--font-jakarta);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ─── Story / blog card — image clip-zoom + accent bar ─────── */
.story-card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}
.story-card:hover { box-shadow: var(--shadow-card); }
.story-card::after {
  /* Bottom accent bar that draws from left on hover */
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 600ms var(--ease-out);
  z-index: 2;
}
.story-card:hover { border-color: var(--color-primary); color: inherit; }
.story-card:hover::after { transform: scaleX(1); }
.story-card__image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.story-card__image img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1.2s var(--ease-out), filter 600ms var(--ease-out);
}
.story-card:hover .story-card__image img {
  transform: scale(1.04);
  filter: saturate(1.1);
}
.story-card__image::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(13,31,36,0) 60%, rgba(13,31,36,0.30) 100%);
}
.story-card__image-tag {
  position: absolute; top: var(--space-4); left: var(--space-4);
  z-index: 2;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(6px);
  font-family: var(--font-jakarta);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.04em;
}
.story-card__body {
  padding: var(--space-6);
  display: flex; flex-direction: column; gap: var(--space-3);
  flex: 1;
}
.story-card__meta {
  display: flex; align-items: center; gap: var(--space-3);
  font-family: var(--font-jakarta);
  font-size: var(--text-caption);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.story-card__meta .dot { width: 3px; height: 3px; background: currentColor; border-radius: 50%; }
.story-card__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.25rem;
  line-height: 1.25;
  color: var(--color-text);
}
.story-card__excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}
.story-card__footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: auto;
  padding-top: var(--space-3);
  font-family: var(--font-jakarta);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}
.story-card__read {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--color-primary); font-weight: 600;
}

/* Featured story (large) */
.story-card--featured {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: stretch;
}
.story-card--featured .story-card__image {
  aspect-ratio: auto;
  height: 100%;
  min-height: 420px;
}
.story-card--featured .story-card__body {
  padding: var(--space-12);
  gap: var(--space-4);
}
.story-card--featured .story-card__title {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
}

@media (max-width: 768px) {
  .story-card--featured { grid-template-columns: 1fr; }
  .story-card--featured .story-card__image { min-height: 220px; }
  .story-card--featured .story-card__body { padding: var(--space-8); }
}

/* ─── Footer ───────────────────────────────────────────────── */
.site-footer {
  background: var(--color-anchor);
  color: rgba(255,255,255,0.72);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-12);
}
.site-footer a { color: rgba(255,255,255,0.72); }
.site-footer a:hover { color: #fff; }
.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-16);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: var(--space-8);
}
.site-footer .brand { color: #fff; }
.site-footer__tagline {
  margin-top: var(--space-4);
  max-width: 320px;
  font-size: 0.9375rem;
  line-height: 1.65;
}
.site-footer__col h4 {
  color: #fff;
  font-family: var(--font-jakarta);
  font-size: var(--text-overline);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: var(--space-5);
}
.site-footer__col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.site-footer__col a { font-size: 0.9375rem; }
.site-footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-jakarta);
  font-size: var(--text-body-sm);
  flex-wrap: wrap; gap: var(--space-3);
}

/* ─── Mobile nav footer CTA (hidden on desktop) ────────────── */
.site-nav__mobile-footer { display: none; }

/* ─── Responsive nav ───────────────────────────────────────── */
@media (max-width: 860px) {
  .site-header__inner { gap: var(--space-4); height: 64px; }
  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }
  .brand__logo--full { display: none; }
  .brand__logo--compact { display: block; }
  .site-nav {
    position: fixed; top: 64px; left: 0; right: 0;
    height: calc(100vh - 64px);
    height: calc(100dvh - 64px);
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: var(--space-8) var(--grid-margin) var(--space-10);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    transform: translateY(-100%);
    transition: transform 380ms var(--ease-out), visibility 0s linear 380ms, opacity 380ms var(--ease-out);
    z-index: 49;
    visibility: hidden;
    opacity: 0;
    overflow-y: auto;
  }
  .site-nav.is-open {
    transform: translateY(0);
    visibility: visible;
    opacity: 1;
    transition: transform 380ms var(--ease-out), visibility 0s linear 0s, opacity 380ms var(--ease-out);
  }
  .site-nav a:not(.btn) {
    font-family: var(--font-heading);
    font-size: 1.875rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--color-text);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-border);
    opacity: 0;
    transform: translateY(12px);
    transition: color 200ms var(--ease-out),
                opacity 300ms var(--ease-out),
                transform 300ms var(--ease-out);
  }
  .site-nav.is-open a:not(.btn) {
    opacity: 1;
    transform: none;
    transition-delay: calc(var(--i, 0) * 55ms + 60ms);
  }
  .site-nav a.is-active { color: var(--color-primary); }
  .site-nav a.is-active::after { display: none; }
  .site-header__inner > .btn { display: none; }

  /* Mobile footer CTA */
  .site-nav__mobile-footer {
    display: block;
    margin-top: auto;
    padding-top: var(--space-8);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 300ms var(--ease-out), transform 300ms var(--ease-out);
  }
  .site-nav.is-open .site-nav__mobile-footer {
    opacity: 1;
    transform: none;
    transition-delay: 240ms;
  }
  .site-nav__mobile-footer .btn {
    width: 100%;
    justify-content: center;
    font-size: 1rem;
    padding: 16px 28px;
  }

  .site-footer__grid,
  .site-footer__top {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-8);
  }
  .site-footer__brandcol { grid-column: 1 / -1; }
  .site-footer__bottom { justify-content: center; text-align: center; flex-direction: column; }
}
@media (max-width: 540px) {
  .site-header__inner { height: 60px; padding: 0 var(--space-5); }
  .brand__logo--compact { height: 28px; }
  .site-nav { top: 60px; height: calc(100vh - 60px); height: calc(100dvh - 60px); }
  .site-nav a:not(.btn) { font-size: 1.5rem; }
  /* Mobile footer — compact. Brand block on top, link columns
     beneath in a 2x2 grid (smaller type, tighter gaps). */
  .site-footer { padding: var(--space-12) 0 var(--space-6); margin-top: var(--space-8); }
  .site-footer__top {
    display: block;
    padding-bottom: var(--space-6);
    margin-bottom: var(--space-5);
  }
  .site-footer__brandcol {
    text-align: center;
    padding-bottom: var(--space-6);
    margin-bottom: var(--space-6);
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .site-footer__brandcol .brand--footer { display: inline-flex; }
  .site-footer__tagline {
    margin: var(--space-3) auto 0;
    max-width: 320px;
    font-size: 0.875rem;
  }
  .site-footer__socials { justify-content: center; margin-top: var(--space-4); }
  /* Three link columns side-by-side on mobile too. */
  .site-footer__top {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    column-gap: var(--space-3);
    row-gap: var(--space-6);
  }
  .site-footer__brandcol { grid-column: 1 / -1; }
  .site-footer__col { display: block; }
  .site-footer__col h4 {
    font-size: 0.7rem;
    margin-bottom: var(--space-3);
  }
  .site-footer__col ul { gap: var(--space-2); }
  .site-footer__col a { font-size: 0.875rem; }
  .site-footer__bottom {
    flex-direction: column; gap: 4px; justify-content: center; text-align: center;
    font-size: 0.8125rem;
  }
  .site-footer__made { display: none; } /* keep just © line */
}

/* ─── Scroll-intent rail ───────────────────────────────────────
   A tiny floating control that surfaces ↑ / ↓ jumps when the user
   shows intent (rapid wheel/touch) or has scrolled deep into the
   page. Stays out of the way otherwise. */
.scroll-rail {
  position: fixed;
  right: clamp(var(--space-4), 2.4vw, var(--space-8));
  bottom: clamp(var(--space-6), 4vw, var(--space-10));
  z-index: 45;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  background: rgba(13, 31, 36, 0.78);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.22), 0 2px 8px rgba(0, 0, 0, 0.18);
  opacity: 0;
  transform: translateY(20px) scale(0.92);
  pointer-events: none;
  transition: opacity 360ms var(--ease-out), transform 420ms var(--ease-out);
}
.scroll-rail.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.scroll-rail.is-pulsing {
  box-shadow: 0 14px 36px rgba(255, 200, 80, 0.28),
              0 0 0 4px rgba(255, 200, 80, 0.18),
              0 12px 32px rgba(0, 0, 0, 0.22);
}
.scroll-rail__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.92);
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  cursor: pointer;
  transition: background 220ms var(--ease-out), color 220ms var(--ease-out), transform 220ms var(--ease-out);
}
.scroll-rail__btn:hover {
  background: rgba(255, 200, 80, 0.18);
  color: var(--color-accent);
  transform: translateY(-1px);
}
.scroll-rail__btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.scroll-rail__btn[disabled] {
  opacity: 0.32;
  cursor: not-allowed;
  transform: none;
}
.scroll-rail__btn[disabled]:hover {
  background: transparent;
  color: rgba(255, 255, 255, 0.92);
  transform: none;
}
.scroll-rail__btn .material-symbols-outlined {
  font-size: 22px;
  font-variation-settings: 'wght' 500;
}
@media (max-width: 540px) {
  .scroll-rail { right: 12px; bottom: 14px; padding: 4px; gap: 6px; }
  .scroll-rail__btn { width: 36px; height: 36px; }
  .scroll-rail__btn .material-symbols-outlined { font-size: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  .scroll-rail { transition: opacity 200ms linear; transform: none; }
}