/* ==========================================================================
   Page: Home (index.html)
   ========================================================================== */

/* Navbar sits transparently over the hero until the page scrolls */
body[data-page="home"] {
  padding-top: 0;
}

body[data-page="home"] .site-navbar:not(.is-scrolled):not(:has(.navbar-collapse.show, .navbar-collapse.collapsing)) {
  background: linear-gradient(180deg, rgba(10, 10, 10, 0.6), transparent);
  border-bottom-color: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

/* ---------- Background videos (shared) ---------- */
.bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.bg-video.is-ready {
  opacity: 1;
}

/* ==========================================================================
   Hero slider — full-screen media, masked headline reveal, tab progress bars
   ========================================================================== */
.hero-slider {
  --hero-duration: 7s;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: grid;
  min-height: max(640px, min(100svh, 980px));
  background: var(--zt-black);
}

/* Slides share one grid cell, so the hero grows to fit the tallest slide
   (short phones) instead of its copy spilling up under the navbar */
.hero-slide {
  position: relative;
  grid-area: 1 / 1;
  display: flex;
  align-items: center;
  padding: calc(var(--navbar-height) + 2rem) 0 9rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.1s ease, visibility 0s linear 1.1s;
}

.hero-slide.is-active {
  z-index: 1;
  opacity: 1;
  visibility: visible;
  transition: opacity 1.1s ease;
}

/* Media with a slow Ken Burns settle */
.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

.hero-media > img,
.hero-media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.14);
  transition: transform calc(var(--hero-duration) + 1.5s) cubic-bezier(0.2, 0.6, 0.3, 1);
}

.hero-slide.is-active .hero-media > img,
.hero-slide.is-active .hero-media > video {
  transform: scale(1);
}

/* White network lines → brand gold */
.hero-media-gold > video {
  filter: sepia(1) saturate(2.4) hue-rotate(-6deg) brightness(0.85);
  opacity: 0.7;
}

/* Readability overlay: dark from the left and bottom, gold glow top-right */
.hero-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(10, 10, 10, 0.92) 0%, rgba(10, 10, 10, 0.7) 45%, rgba(10, 10, 10, 0.25) 100%),
    linear-gradient(0deg, rgba(10, 10, 10, 0.95) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 15%, rgba(var(--zt-gold-rgb), 0.18), transparent 55%);
}

.hero-copy {
  position: relative;
}

.hero-title {
  max-width: 14ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.6rem, 6.2vw, 5.4rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: #fff;
}

/* Masked line reveal: each line slides up from behind its own clip */
.hero-title .line {
  display: block;
  overflow: hidden;
  padding-bottom: 0.08em;   /* room for descenders inside the mask */
  margin-bottom: -0.08em;
}

.hero-title .line > span {
  display: inline-block;
  transform: translateY(110%);
  transition: transform 1.1s var(--ease-out);
}

.hero-slide.is-active .hero-title .line > span { transform: none; }
.hero-slide.is-active .hero-title .line:nth-child(1) > span { transition-delay: 0.25s; }
.hero-slide.is-active .hero-title .line:nth-child(2) > span { transition-delay: 0.38s; }
.hero-slide.is-active .hero-title .line:nth-child(3) > span { transition-delay: 0.51s; }

/* Eyebrow, lead and buttons fade up after the title */
.hero-anim {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.hero-slide.is-active .hero-anim { opacity: 1; transform: none; }
.hero-slide.is-active .eyebrow.hero-anim { transition-delay: 0.1s; }
.hero-slide.is-active .hero-lead.hero-anim { transition-delay: 0.6s; }
.hero-slide.is-active .hero-actions.hero-anim { transition-delay: 0.75s; }

.hero-lead {
  max-width: 34rem;
  margin-bottom: 2.25rem;
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  color: rgba(236, 231, 218, 0.8);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- Tabs with progress bars ---------- */
.hero-nav {
  position: absolute;
  inset: auto 0 0;
  z-index: 2;
  padding-bottom: clamp(1.25rem, 3vw, 2.25rem);
}

.hero-tabs {
  display: grid;
  flex: 1;
  grid-auto-columns: 1fr;
  grid-auto-flow: column;   /* one equal column per slide */
  gap: clamp(0.75rem, 2vw, 1.75rem);
}

.hero-tab {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.15rem 0.6rem;
  padding: 0 0 0.25rem;
  border: 0;
  background: none;
  text-align: left;
  color: rgba(236, 231, 218, 0.55);
  cursor: pointer;
  transition: color var(--transition-base);
}

.hero-tab:hover,
.hero-tab.is-active {
  color: #fff;
}

.hero-tab:focus-visible {
  outline: 2px solid var(--zt-gold);
  outline-offset: 6px;
  border-radius: 2px;
}

.hero-tab-track {
  position: relative;
  display: block;
  flex: 0 0 100%;
  height: 2px;
  margin-bottom: 0.85rem;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.18);
}

.hero-tab-bar {
  position: absolute;
  inset: 0;
  background: var(--zt-gold-gradient);
  transform: scaleX(0);
  transform-origin: left;
}

.hero-tab.is-active .hero-tab-bar {
  animation: hero-progress var(--hero-duration) linear forwards;
}

.hero-slider.is-paused .hero-tab.is-active .hero-tab-bar {
  animation-play-state: paused;
}

@keyframes hero-progress {
  to { transform: scaleX(1); }
}

.hero-tab-num {
  font-family: var(--font-accent);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--zt-gold);
}

.hero-tab-title {
  flex: 1 1 0;              /* share the row with the number instead of wrapping below it */
  min-width: 0;
  overflow: hidden;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* Five tabs are too narrow for titles below xl — show numbers only (like mobile) */
@media (max-width: 1199.98px) {
  .hero-tab-title {
    display: none;
  }
}

.hero-toggle {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1px solid rgba(var(--zt-gold-rgb), 0.5);
  background: rgba(10, 10, 10, 0.45);
  color: var(--zt-gold);
  font-size: 1.15rem;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.hero-toggle:hover {
  background: var(--zt-gold);
  color: var(--zt-black);
}

@media (max-width: 767.98px) {
  .hero-slide {
    align-items: flex-end;
    padding-bottom: 7rem;
  }

  .hero-slide::before {
    background:
      linear-gradient(0deg, rgba(10, 10, 10, 0.97) 10%, rgba(10, 10, 10, 0.55) 60%, rgba(10, 10, 10, 0.35) 100%);
  }

  .hero-tab-title {
    display: none;
  }
}

/* ---------- Ticker ---------- */
.ticker {
  overflow: hidden;
  padding-block: 1.15rem;
  border-block: 1px solid var(--bs-border-color);
  background: var(--bs-tertiary-bg);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}

.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker 40s linear infinite;
}

.ticker-track span {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-accent);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--bs-secondary-color);
}

.ticker-track span::after {
  content: "✦";
  margin-inline: 2rem;
  font-size: 0.75rem;
  color: var(--brand-text);
}

.ticker:hover .ticker-track {
  animation-play-state: paused;
}

@keyframes ticker {
  to { transform: translateX(-50%); }
}

/* ==========================================================================
   Scale reveal (Apple-style) — sticky stage; JS sets --media-p and --copy-p
   ========================================================================== */
.scale-reveal {
  --media-p: 0;
  --copy-p: 0;
  position: relative;
  height: 280vh;
  background: var(--zt-black);
}

.scale-reveal-sticky {
  position: sticky;
  top: 0;
  display: grid;
  place-items: center;
  height: 100svh;
  overflow: hidden;
}

/* Starts as a rounded card in the middle, grows to fill the screen */
.scale-reveal-media {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: calc((1 - var(--media-p)) * 2.5rem);
  transform: scale(calc(0.5 + var(--media-p) * 0.5));
  will-change: transform;
}

.scale-reveal-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(10, 10, 10, 0.55), rgba(10, 10, 10, 0.92) 80%),
    linear-gradient(135deg, rgba(var(--zt-gold-rgb), 0.2), transparent 60%);
  opacity: min(1, 0.2 + var(--media-p) * 0.55 + var(--copy-p) * 0.45); /* darkens as it grows, before words appear */
}

.scale-reveal-copy {
  position: relative;
  max-width: 60rem;
  opacity: clamp(0, var(--copy-p) * 4, 1);
  transform: translateY(calc((1 - min(var(--copy-p) * 4, 1)) * 30px));
}

.scale-reveal-quote {
  margin: 0.75rem 0 2.5rem;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: #fff;
}

/* Words dim → lit as you scroll */
.scale-reveal-quote .word {
  opacity: 0.18;
  transition: opacity 0.35s ease;
}

.scale-reveal-quote .word.is-lit {
  opacity: 1;
}

.scale-reveal-copy .btn {
  opacity: clamp(0, (var(--copy-p) - 0.8) * 5, 1);
}

/* ---------- Reduced motion: no loops, no sticky stage ---------- */
@media (prefers-reduced-motion: reduce) {
  .ticker-track {
    animation: none !important;
  }

  .hero-media > img,
  .hero-media > video {
    transform: none;
  }

  .scale-reveal {
    height: auto;
  }

  .scale-reveal-sticky {
    position: relative;
    height: auto;
    min-height: 70vh;
    padding-block: 6rem;
  }
}