/* ═══════════════════════════════════════════════════════════════
   HCF Philosophy Cinematic — Horizontal Scroll Card System
   3 Cards (HONOR / COURAGE / FAITH) → LOGO Merge
   Desktop: GSAP ScrollTrigger pin + horizontal track
   Mobile:  CSS scroll-snap (overflow-x: auto)
   ═══════════════════════════════════════════════════════════════ */

/* ── Component-scoped variables — connected to global theme system ──
   IMPORTANT: --hcf-cyan-rgb fallback (104,220,255) must match
   --hcf-cyan fallback (#68dcff). Update both together if needed. */
.hcf-philosophy-cinematic {
  --hcf-cyan:      var(--theme-cyan, #68dcff);
  --hcf-cyan-rgb:  var(--theme-cyan-rgb, 104, 220, 255);
  --hcf-bg:        #02060c;
  --hcf-panel:     rgba(5, 14, 27, 0.72);
  --hcf-border:    rgba(var(--hcf-cyan-rgb), 0.2);
  --hcf-text:      #eef7ff;
  --hcf-text-soft: rgba(220, 236, 255, 0.82);
  --hcf-glow:      rgba(var(--hcf-cyan-rgb), 0.14);
}

/* ── Section wrapper ── */
.hcf-philosophy-cinematic {
  position: relative;
  color: var(--hcf-text);
  background:
    radial-gradient(circle at 50% 0%, rgba(var(--hcf-cyan-rgb), 0.08), transparent 40%),
    linear-gradient(180deg, #02060c 0%, #07111d 50%, #02060c 100%);
}

/* Subtle grid overlay */
.hcf-philosophy-cinematic::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--hcf-cyan-rgb), 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--hcf-cyan-rgb), 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* ── Section header (scrolls into view before pin triggers) ── */
.hcf-philosophy-head {
  position: relative;
  z-index: 2;
  padding: 80px 24px 48px;
  max-width: 860px;
  margin: 0 auto;
}

.hcf-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--hcf-cyan);
  padding: 10px 16px;
  border: 1px solid rgba(var(--hcf-cyan-rgb), 0.28);
  background: rgba(0, 35, 72, 0.2);
  box-shadow: inset 0 0 18px rgba(var(--hcf-cyan-rgb), 0.06), 0 0 30px rgba(0, 0, 0, 0.24);
  margin-bottom: 20px;
}

.hcf-philosophy-head h2 {
  margin: 0 0 16px;
  font-size: clamp(40px, 5vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-weight: 900;
}

.hcf-philosophy-head > p {
  margin: 0;
  font-size: 18px;
  line-height: 1.9;
  color: var(--hcf-text-soft);
  max-width: 620px;
}

/* ── Horizontal scroll viewport (pinned by GSAP on desktop) ── */
.hcf-hscroll-outer {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  z-index: 1;
}

/* ── Horizontal track (desktop: translated by GSAP; mobile: native flex) ── */
.hcf-hscroll-track {
  display: flex;
  height: 100%;
  /* 4 full-viewport panels: 3 cards + 1 merge stage */
  width: calc(4 * 100vw);
  will-change: transform;
}

/* ══════════════════════════════════════════════════════
   CARD STYLES
   ══════════════════════════════════════════════════════ */

.hcf-card {
  width: 100vw;
  height: 100%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(32px, 5vw, 80px);
  padding: 48px clamp(40px, 8vw, 120px);
  box-sizing: border-box;
  position: relative;
}

/* Glassmorphism card panel (pseudo-element so it doesn't affect children) */
.hcf-card::after {
  content: "";
  position: absolute;
  inset: 8% 8%;
  border-radius: 24px;
  border: 1px solid var(--hcf-border);
  background: linear-gradient(135deg, rgba(5, 16, 36, 0.78), rgba(2, 8, 18, 0.90));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.03),
    0 0 60px rgba(var(--hcf-cyan-rgb), 0.06),
    0 40px 80px rgba(0, 0, 0, 0.45);
  z-index: 0;
}

/* All card children must sit above the pseudo glass panel */
.hcf-card__icon,
.hcf-card__body {
  position: relative;
  z-index: 1;
}

/* ── Card icon (left side) ── */
.hcf-card__icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hcf-card__icon img {
  width: clamp(140px, 20vw, 280px);
  height: auto;
  object-fit: contain;
  display: block;
  animation: hcf-icon-breathe 3.5s ease-in-out infinite;
  will-change: filter;
}

@keyframes hcf-icon-breathe {
  0%, 100% { filter: drop-shadow(0 0 24px rgba(var(--hcf-cyan-rgb), 0.20)); }
  50%       { filter: drop-shadow(0 0 52px rgba(var(--hcf-cyan-rgb), 0.52)); }
}

/* Halo ring around icon */
.hcf-card__icon::before {
  content: "";
  position: absolute;
  width: 140%;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid rgba(var(--hcf-cyan-rgb), 0.14);
  animation: hcf-ring-spin 10s linear infinite;
  will-change: transform;
  pointer-events: none;
}

@keyframes hcf-ring-spin {
  to { transform: rotate(360deg); }
}

/* ── Card text body (right side) ── */
.hcf-card__body {
  flex: 1;
  max-width: 420px;
}

.hcf-card__code {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--hcf-cyan);
  padding: 6px 12px;
  border: 1px solid rgba(var(--hcf-cyan-rgb), 0.3);
  margin-bottom: 16px;
}

.hcf-card__en {
  margin: 0 0 4px;
  font-size: clamp(13px, 1.4vw, 18px);
  letter-spacing: 0.32em;
  font-weight: 700;
  color: var(--hcf-cyan);
  opacity: 0.8;
  text-transform: uppercase;
}

.hcf-card__zh {
  margin: 0 0 20px;
  font-size: clamp(52px, 7.5vw, 100px);
  line-height: 0.9;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.hcf-card__desc {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 20px);
  line-height: 1.85;
  color: var(--hcf-text-soft);
  font-weight: 600;
}

.hcf-card__detail {
  margin: 0.75em 0 0;
  font-size: 0.85em;
  line-height: 1.85;
  opacity: 0.8;
  color: var(--hcf-text-soft);
  font-weight: 400;
}

/* ══════════════════════════════════════════════════════
   MERGE STAGE
   ══════════════════════════════════════════════════════ */

.hcf-merge-stage {
  width: 100vw;
  height: 100%;
  flex-shrink: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* Floating pieces (positioned by JS / CSS) */
.hcf-merge-piece {
  position: absolute;
  width: clamp(90px, 13vw, 200px);
  height: auto;
  object-fit: contain;
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
}

/* Initial spread positions — JS will animate these to center */
.hcf-merge-piece--triangle { top: 14%; left: 18%; }
.hcf-merge-piece--shark    { top: 10%; right: 18%; }
.hcf-merge-piece--anchor   { bottom: 18%; left: 50%; transform: translateX(-50%); }

/* Impact flash (full-screen radial burst) */
.hcf-impact-flash {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.92) 0%,
    rgba(var(--hcf-cyan-rgb), 0.35) 28%,
    transparent 68%
  );
  opacity: 0;
  pointer-events: none;
  z-index: 6;
  will-change: opacity;
}

/* Final logo + CTA panel */
.hcf-merge-logo {
  position: relative;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  opacity: 0;
  transform: scale(0.6);
  will-change: transform, opacity;
}

.hcf-merge-logo img {
  width: clamp(180px, 26vw, 400px);
  height: auto;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 0 40px rgba(var(--hcf-cyan-rgb), 0.40));
}

.hcf-merge-tagline {
  margin-top: 18px;
  font-size: 13px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--hcf-cyan);
  opacity: 0.88;
}

.hcf-merge-subtitle {
  margin: 12px 0 28px;
  font-size: clamp(14px, 1.4vw, 17px);
  line-height: 1.75;
  color: var(--hcf-text-soft);
  max-width: 380px;
}

/* ── CTA Button ── */
.hcf-fusion-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 220px;
  min-height: 56px;
  padding: 0 36px;
  text-decoration: none;
  color: var(--hcf-cyan);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: 0.08em;
  border: 1px solid rgba(var(--hcf-cyan-rgb), 0.52);
  background: rgba(0, 26, 58, 0.35);
  box-shadow: 0 0 28px rgba(var(--hcf-cyan-rgb), 0.10);
  transition: transform 0.3s ease, box-shadow 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.hcf-fusion-cta:hover {
  transform: translateY(-3px);
  color: #fff;
  border-color: rgba(var(--hcf-cyan-rgb), 0.88);
  box-shadow: 0 0 50px rgba(var(--hcf-cyan-rgb), 0.28);
}

.hcf-fusion-cta:active {
  transform: scale(0.97);
  transition-duration: 0.1s;
}

/* ── Mobile scroll-position dots ── */
.hcf-dots {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 20px 0 32px;
  position: relative;
  z-index: 2;
}

.hcf-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(var(--hcf-cyan-rgb), 0.25);
  transition: background 0.3s ease, transform 0.3s ease;
}

.hcf-dot--active {
  background: var(--hcf-cyan);
  transform: scale(1.4);
}

/* ══════════════════════════════════════════════════════
   MOBILE  (≤768px) — CSS scroll-snap, no GSAP pin
   ══════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .hcf-philosophy-head {
    padding: 56px 20px 28px;
  }

  .hcf-philosophy-head h2 {
    font-size: clamp(36px, 10vw, 56px);
  }

  .hcf-philosophy-head > p {
    font-size: 15px;
  }

  /* Make outer the horizontal scroll container */
  .hcf-hscroll-outer {
    height: auto;
    overflow-x: auto;
    overflow-y: visible;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .hcf-hscroll-outer::-webkit-scrollbar { display: none; }

  /* Track stretches to fit all cards naturally */
  .hcf-hscroll-track {
    width: max-content;
    height: auto;
    align-items: flex-start;
    gap: 0;
    padding: 0 6vw;
  }

  /* Mobile cards */
  .hcf-card {
    width: 88vw;
    min-height: 62vh;
    height: auto;
    flex-direction: column;
    gap: 24px;
    padding: 32px 24px;
    margin: 0 3vw;
    flex-shrink: 0;
    scroll-snap-align: center;
  }

  .hcf-card::after {
    inset: 0;
    border-radius: 16px;
  }

  .hcf-card__icon img {
    width: clamp(100px, 38vw, 180px);
  }

  .hcf-card__zh {
    font-size: clamp(44px, 12vw, 68px);
    margin-bottom: 14px;
  }

  .hcf-card__desc {
    font-size: 15px;
  }

  /* Mobile merge stage */
  .hcf-merge-stage {
    width: 88vw;
    min-height: 62vh;
    height: auto;
    margin: 0 3vw;
    padding: 48px 24px;
    box-sizing: border-box;
    flex-shrink: 0;
    scroll-snap-align: center;
  }

  /* Hide pieces and flash on mobile — logo revealed via CSS animation */
  .hcf-merge-piece,
  .hcf-impact-flash { display: none; }

  /* Mobile logo: hidden by default, revealed by IntersectionObserver */
  .hcf-merge-logo {
    opacity: 0;
    transform: scale(0.84) translateY(20px);
    transition: opacity 0.9s cubic-bezier(.16, 1, .3, 1), transform 0.9s cubic-bezier(.16, 1, .3, 1);
  }

  .hcf-merge-logo.hcf-merge-logo--visible {
    opacity: 1;
    transform: scale(1) translateY(0);
  }

  .hcf-merge-logo img {
    width: min(240px, 68vw);
  }

  .hcf-merge-subtitle {
    font-size: 14px;
  }

  /* Show dot indicators on mobile */
  .hcf-dots { display: flex; }

  /* Breathing animation adapted for mobile */
  @keyframes hcf-icon-breathe {
    0%, 100% { filter: drop-shadow(0 0 18px rgba(var(--hcf-cyan-rgb), 0.2)); }
    50%       { filter: drop-shadow(0 0 36px rgba(var(--hcf-cyan-rgb), 0.48)); }
  }
}

/* ── PWA mode: offset for bottom tab bar ── */
.pwa-mode .hcf-philosophy-cinematic {
  padding-bottom: calc(70px + env(safe-area-inset-bottom));
}

/* ── Reduced motion: skip all animations, show final state ── */
@media (prefers-reduced-motion: reduce) {
  .hcf-card__icon img { animation-name: none; }
  .hcf-card__icon::before { animation-name: none; }

  .hcf-card {
    opacity: 1;
    transform: none;
  }

  .hcf-merge-logo {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hcf-merge-piece,
  .hcf-impact-flash { display: none; }
}