/* ============================================================
   GOLDCARD – Premium Motion System
   Philosophy: Trust · Elegance · Discretion · Calm Confidence
   ============================================================

   Principles:
   - CSS transforms + opacity only (GPU-composited)
   - Easing: custom cubic-bezier curves, never linear
   - Duration: 400–900ms for reveals, 180–280ms for micro-interactions
   - Stagger via --delay custom props set by JS
   - Full reduced-motion support
   ============================================================ */

/* ─── 1. Motion Design Tokens ───────────────────────────────── */
:root {
  /* Easing curves */
  --ease-out-expo:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart:  cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-circ:   cubic-bezier(0, 0.55, 0.45, 1);
  --ease-in-out-soft: cubic-bezier(0.45, 0, 0.15, 1);
  --ease-spring:     cubic-bezier(0.34, 1.56, 0.64, 1);   /* subtle spring – only for tiny elements */

  /* Duration scale */
  --dur-instant:  120ms;
  --dur-fast:     200ms;
  --dur-base:     380ms;
  --dur-medium:   560ms;
  --dur-slow:     760ms;
  --dur-enter:    900ms;

  /* Stagger base */
  --stagger-sm: 60ms;
  --stagger-md: 90ms;
  --stagger-lg: 130ms;

  /* Elevation shadows for hover depth */
  --shadow-rest:   0 2px 8px rgba(0,0,0,0.45),  0 1px 2px rgba(0,0,0,0.3);
  --shadow-hover:  0 12px 40px rgba(0,0,0,0.6),  0 4px 12px rgba(0,0,0,0.35);
  --shadow-gold-sm: 0 0 0 1px rgba(159,120,41,0.25);
  --shadow-gold-md: 0 8px 32px rgba(159,120,41,0.15), 0 0 0 1px rgba(159,120,41,0.3);
}

/* ─── 2. Reduced-Motion: Opt Out ────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration:   0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration:  0.01ms !important;
    scroll-behavior:      auto   !important;
  }
  .gc-reveal, .gc-reveal-left, .gc-reveal-right, .gc-reveal-scale {
    opacity: 1 !important;
    transform: none !important;
  }
  .hero__headline-line,
  .hero__cta,
  .hero__bottom,
  .navbar__logo--anim {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
}

/* ─── 3. Scroll-Reveal Base States ─────────────────────────── */
/*
  Elements receive .gc-reveal (or variant) from JS before they enter view.
  JS removes .gc-reveal--hidden and adds .gc-reveal--visible.
  We use a data-delay attribute for stagger.
*/

.gc-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity  var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.gc-reveal-left {
  opacity: 0;
  transform: translateX(-24px);
  transition:
    opacity  var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.gc-reveal-right {
  opacity: 0;
  transform: translateX(24px);
  transition:
    opacity  var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.gc-reveal-scale {
  opacity: 0;
  transform: scale(0.97) translateY(16px);
  transition:
    opacity   var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

/* Visible state – JS adds this class */
.gc-reveal.is-visible,
.gc-reveal-left.is-visible,
.gc-reveal-right.is-visible,
.gc-reveal-scale.is-visible {
  opacity: 1;
  transform: none;
}

/* ─── 4. Hero Staged Entrance ───────────────────────────────── */
/* Applied to hero children via JS on DOMContentLoaded */
.hero-enter {
  opacity: 0;
  transform: translateY(20px);
  animation: heroEnter var(--dur-enter) var(--ease-out-expo) forwards;
  animation-delay: var(--hero-delay, 0ms);
}

@keyframes heroEnter {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Hero content block wrapper ── */
.hero__content {
  position: relative;
  z-index: 2;
}

/* ── Headline: each line staggers in independently ── */
.hero__headline {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.hero__headline-line {
  display: block;
  opacity: 0;
  transform: translateY(22px);
  animation: heroLineFade 900ms var(--ease-out-expo) both;
}
.hero__headline-line--1 { animation-delay: 150ms; }
.hero__headline-line--2 { animation-delay: 300ms; }
.hero__headline-line--3 { animation-delay: 450ms; }

@keyframes heroLineFade {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── CTA fades in after last headline line ── */
.hero__cta {
  position: relative;
  z-index: 2;
  opacity: 0;
  animation: heroLineFade 800ms var(--ease-out-expo) 620ms both;
}

/* ── Bottom pillars ── */
.hero__bottom {
  z-index: 2;
  opacity: 0;
  animation: heroLineFade 800ms var(--ease-out-expo) 750ms both;
}

/* ── Navbar logo: subtle fade + scale ── */
.navbar__logo--anim {
  opacity: 0;
  animation: logoReveal 900ms var(--ease-out-expo) 80ms both;
}
@keyframes logoReveal {
  from {
    opacity: 0;
    transform: scale(0.97);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Hero ambient shimmer: ultra-subtle gold grain overlay */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 120% 60% at 60% 40%,
    rgba(159, 120, 41, 0.04) 0%,
    transparent 70%
  );
  pointer-events: none;
  animation: heroAmbient 8s var(--ease-in-out-soft) infinite alternate;
  z-index: 1;
}

@keyframes heroAmbient {
  0%   { opacity: 0.6; transform: scale(1)    translateX(0); }
  100% { opacity: 1;   transform: scale(1.04) translateX(-1%); }
}

/* ─── 5. Navbar Motion ──────────────────────────────────────── */
.navbar {
  transition:
    background     var(--dur-medium) var(--ease-out-quart),
    backdrop-filter var(--dur-medium) var(--ease-out-quart),
    border-color    var(--dur-medium) var(--ease-out-quart),
    box-shadow      var(--dur-medium) var(--ease-out-quart) !important;
}

/* Page-load navbar fade-in */
.navbar {
  animation: navbarEnter 700ms var(--ease-out-expo) both;
  animation-delay: 200ms;
}
@keyframes navbarEnter {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Scrolled state depth */
.navbar.scrolled {
  box-shadow: 0 1px 0 rgba(159,120,41,0.12), 0 4px 24px rgba(0,0,0,0.4);
}

/* Nav links: premium underline slide */
.navbar__link {
  transition:
    color    var(--dur-fast) var(--ease-out-quart) !important;
}
.navbar__link::after {
  transition: width var(--dur-base) var(--ease-out-expo) !important;
}

/* CTA button in nav */
.navbar__actions .btn--outline {
  transition:
    background  var(--dur-fast) var(--ease-out-quart),
    border-color var(--dur-fast) var(--ease-out-quart),
    box-shadow  var(--dur-fast) var(--ease-out-quart),
    transform   var(--dur-fast) var(--ease-out-quart) !important;
}
.navbar__actions .btn--outline:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-gold-md);
}
.navbar__actions .btn--outline:active {
  transform: translateY(0);
  box-shadow: var(--shadow-gold-sm);
}

/* Mobile menu: slide + fade */
.mobile-menu {
  opacity: 0;
  transform: translateY(-6px);
  transition:
    opacity   var(--dur-base) var(--ease-out-expo),
    transform var(--dur-base) var(--ease-out-expo) !important;
  pointer-events: none;
}
.mobile-menu.menu-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
/* Override hidden so we can animate */
.mobile-menu[hidden] {
  display: flex !important;
  opacity: 0;
  pointer-events: none;
}

.mobile-menu__link {
  opacity: 0;
  transform: translateX(-8px);
  transition:
    opacity   var(--dur-base) var(--ease-out-expo),
    transform var(--dur-base) var(--ease-out-expo),
    color     var(--dur-fast) var(--ease-out-quart) !important;
}
.mobile-menu.menu-open .mobile-menu__link {
  opacity: 1;
  transform: translateX(0);
}
/* Stagger each link */
.mobile-menu.menu-open .mobile-menu__link:nth-child(1) { transition-delay: 60ms; }
.mobile-menu.menu-open .mobile-menu__link:nth-child(2) { transition-delay: 90ms; }
.mobile-menu.menu-open .mobile-menu__link:nth-child(3) { transition-delay: 120ms; }
.mobile-menu.menu-open .mobile-menu__link:nth-child(4) { transition-delay: 150ms; }
.mobile-menu.menu-open .mobile-menu__link:nth-child(5) { transition-delay: 180ms; }
.mobile-menu.menu-open .mobile-menu__link:nth-child(6) { transition-delay: 210ms; }

/* ─── 6. Buttons – Premium Micro-Interactions ───────────────── */
.btn {
  transition:
    background    var(--dur-fast) var(--ease-out-quart),
    border-color  var(--dur-fast) var(--ease-out-quart),
    color         var(--dur-fast) var(--ease-out-quart),
    box-shadow    var(--dur-fast) var(--ease-out-quart),
    transform     var(--dur-fast) var(--ease-out-quart),
    filter        var(--dur-fast) var(--ease-out-quart) !important;
  will-change: transform, box-shadow;
}

.btn--outline:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold-md);
}
.btn--outline:active {
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-gold-sm);
  transition-duration: var(--dur-instant) !important;
}

.btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(159,120,41,0.35);
  filter: brightness(1.06);
}
.btn--gold:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 8px rgba(159,120,41,0.2);
  transition-duration: var(--dur-instant) !important;
}

/* ─── 7. Feature Cards – Elevation Hover ────────────────────── */
.feature-card {
  transition:
    transform  var(--dur-medium) var(--ease-out-expo),
    box-shadow var(--dur-medium) var(--ease-out-expo) !important;
  will-change: transform, box-shadow;
}
.feature-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 24px 60px rgba(0,0,0,0.55), var(--shadow-gold-sm);
}

/* ─── 8. FC Panel hover glow ────────────────────────────────── */
.fc-panel {
  transition:
    box-shadow var(--dur-base) var(--ease-out-expo),
    border-color var(--dur-base) var(--ease-out-expo) !important;
}
.feature-card:hover .fc-panel {
  border-color: rgba(196,151,62,0.8);
  box-shadow:
    0 0 0 0.5px rgba(196,151,62,0.18) inset,
    0 12px 40px rgba(0,0,0,0.55),
    0 0 20px rgba(196,151,62,0.08);
}

/* ─── 9. Membership Plan Cards ──────────────────────────────── */
.plan-card {
  transition:
    border-color var(--dur-base) var(--ease-out-expo),
    box-shadow   var(--dur-base) var(--ease-out-expo),
    transform    var(--dur-base) var(--ease-out-expo),
    background   var(--dur-base) var(--ease-out-expo) !important;
  will-change: transform, box-shadow;
}
.plan-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5), var(--shadow-gold-md);
  border-color: rgba(159,120,41,0.5);
}
.plan-card--vip:hover {
  box-shadow: 0 24px 60px rgba(0,0,0,0.55), 0 0 0 1px rgba(248,203,115,0.35),
              0 0 40px rgba(159,120,41,0.12);
}

/* Plan card inner items: stagger on reveal handled in JS */
.plan-card__feature {
  transition: color var(--dur-fast) var(--ease-out-quart);
}
.plan-card:hover .plan-card__feature--check::before {
  filter: brightness(1.3);
}

/* ─── 10. Product Tabs ───────────────────────────────────────── */
.products__tab {
  transition:
    color         var(--dur-fast) var(--ease-out-quart),
    border-color  var(--dur-fast) var(--ease-out-quart) !important;
  position: relative;
}
.products__tab::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0;
  width: 0; height: 2px;
  background: var(--gold-dark);
  transition: width var(--dur-base) var(--ease-out-expo);
}
.products__tab:hover::after { width: 100%; }
.products__tab--active::after { width: 100%; }

/* Panel fade */
.products__panel {
  animation: panelReveal var(--dur-medium) var(--ease-out-expo) both !important;
}
@keyframes panelReveal {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── 11. Nav link logo subtle pulse on hover ────────────────── */
.navbar__logo-img {
  transition: opacity var(--dur-fast) var(--ease-out-quart),
              transform var(--dur-fast) var(--ease-out-quart);
}
.navbar__logo:hover .navbar__logo-img {
  opacity: 0.85;
  transform: scale(0.97);
}

/* ─── 12. FAQ Accordion – Smooth Height ─────────────────────── */
.faq__answer {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition:
    max-height var(--dur-medium) var(--ease-out-expo),
    opacity    var(--dur-base)   var(--ease-out-quart),
    padding-bottom var(--dur-base) var(--ease-out-quart) !important;
  padding-bottom: 0;
}
/* JS removes [hidden] and sets max-height inline */
.faq__answer.is-open {
  opacity: 1;
  padding-bottom: 24px;
}
/* Override hidden attr so CSS transition works */
.faq__answer[hidden] {
  display: block !important;
}

.faq__question {
  transition: color var(--dur-fast) var(--ease-out-quart) !important;
}
.faq__icon {
  transition: transform var(--dur-base) var(--ease-out-expo) !important;
}
.faq__question[aria-expanded="true"] .faq__icon {
  transform: rotate(45deg);
}

/* ─── 13. Image Parallax Container ──────────────────────────── */
.gc-parallax {
  overflow: hidden;
  border-radius: inherit;
}
.gc-parallax img {
  will-change: transform;
  transition: transform 0.1s linear;
}

/* ─── 14. Store Buttons ──────────────────────────────────────── */
.store-btn {
  transition:
    background   var(--dur-fast) var(--ease-out-quart),
    border-color var(--dur-fast) var(--ease-out-quart),
    transform    var(--dur-fast) var(--ease-out-quart),
    box-shadow   var(--dur-fast) var(--ease-out-quart) !important;
}
.store-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.4), var(--shadow-gold-sm);
}
.store-btn:active {
  transform: translateY(0) scale(0.98);
  transition-duration: var(--dur-instant) !important;
}

/* ─── 15. Footer nav links ───────────────────────────────────── */
.footer__nav-link,
.footer__email,
.footer__legal-link {
  transition: color var(--dur-fast) var(--ease-out-quart) !important;
  position: relative;
}

/* ─── 16. Live Price Ticker animation ───────────────────────── */
@keyframes tickerFlash {
  0%   { opacity: 0.6; }
  50%  { opacity: 1;   }
  100% { opacity: 0.6; }
}
.livefeed__price {
  transition: color var(--dur-base) var(--ease-out-quart);
}
.price-flash {
  animation: tickerFlash 600ms var(--ease-in-out-soft);
}

/* ─── 17. Au Badge spin (subtle, one-time on hover) ─────────── */
.au-badge {
  transition: box-shadow var(--dur-base) var(--ease-out-expo) !important;
}
.au-badge:hover {
  box-shadow: 0 0 0 2px rgba(248,203,115,0.4), 0 4px 12px rgba(159,120,41,0.2);
}

/* ─── 18. Section separators fade ───────────────────────────── */
.why, .livefeed, .everyday, .appshowcase, .products, .membership, .faq, .footer {
  transition: background var(--dur-slow) var(--ease-out-quart);
}

/* ─── 19. App section – elegant float ───────────────────────── */
.appshowcase__right {
  overflow: visible;
}
.phone-mockup__img {
  animation: appFloat 8s ease-in-out infinite alternate;
  will-change: transform;
}
@keyframes appFloat {
  0%   { transform: translateY(0px); }
  100% { transform: translateY(-10px); }
}

/* ─── 20. Gold bar subtle shimmer ───────────────────────────── */
.livefeed__img {
  position: relative;
  transition: transform var(--dur-medium) var(--ease-out-expo),
              box-shadow var(--dur-medium) var(--ease-out-expo);
}
.livefeed__img:hover {
  transform: scale(1.018);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(159,120,41,0.2);
}

/* ─── 21. Lifestyle image subtle scale on hover ─────────────── */
.everyday__lifestyle-img,
.products__panel-img {
  transition: transform var(--dur-medium) var(--ease-out-expo) !important;
  overflow: hidden;
}
.everyday__lifestyle-img:hover,
.products__panel-img:hover {
  transform: scale(1.02);
}

/* ─── 22. Section headline accent line ──────────────────────── */
.why__label,
.livefeed__tag,
.everyday__tag {
  transition: opacity var(--dur-fast) var(--ease-out-quart),
              letter-spacing var(--dur-medium) var(--ease-out-expo);
}

/* ─── 23. Why section – premium stagger & gold line ─────────── */

/* Slower, heavier reveal for the muted lines */
.why__item.gc-reveal {
  transform: translateY(20px);
  transition:
    opacity  800ms var(--ease-out-expo),
    transform 800ms var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

/* "But Gold Endures" – stronger, longer entrance */
.why__item--gold.gc-reveal {
  transform: translateY(28px);
  transition:
    opacity  1000ms var(--ease-out-expo),
    transform 1000ms var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

/* Gold word shimmer pulse – triggers once when line is revealed */
.why__item--gold .why__gold-word {
  display: inline-block; /* needed for transform/filter */
}
.why__item--gold.is-visible .why__gold-word {
  animation: goldWordReveal 1400ms var(--ease-out-expo) 300ms both;
}

@keyframes goldWordReveal {
  0%   { filter: brightness(0.6); letter-spacing: -0.01em; }
  60%  { filter: brightness(1.35); letter-spacing: 0.01em; }
  100% { filter: brightness(1);   letter-spacing: 0; }
}

/* Right column: body text slightly slower reveal */
.why__body.gc-reveal-right {
  transform: translateX(20px);
  transition:
    opacity  900ms var(--ease-out-expo),
    transform 900ms var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

/* Button: hover glow + subtle scale */
.why__btn {
  transition:
    transform  var(--dur-base) var(--ease-out-expo),
    box-shadow var(--dur-base) var(--ease-out-expo),
    border-color var(--dur-base) var(--ease-out-expo),
    background  var(--dur-base) var(--ease-out-expo) !important;
}
.why__btn:hover {
  transform: scale(1.03);
  box-shadow:
    0 0 0 1px rgba(196, 151, 62, 0.5),
    0 8px 28px rgba(159, 120, 41, 0.22),
    0 0 18px rgba(159, 120, 41, 0.12);
  border-color: rgba(196, 151, 62, 0.8);
}
.why__btn:active {
  transform: scale(0.99);
  box-shadow: 0 0 0 1px rgba(196, 151, 62, 0.3);
}

/* ─── 23. Membership CTA row btn ────────────────────────────── */
.membership__cta-row .btn {
  transition:
    transform  var(--dur-base) var(--ease-out-expo),
    box-shadow var(--dur-base) var(--ease-out-expo),
    border-color var(--dur-base) var(--ease-out-expo) !important;
}
.membership__cta-row .btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold-md);
}

/* ─── 24. Navbar entrance: stagger links ────────────────────── */
.navbar__link {
  animation: navLinkEnter 500ms var(--ease-out-expo) both;
}
.navbar__link:nth-child(1) { animation-delay: 350ms; }
.navbar__link:nth-child(2) { animation-delay: 410ms; }
.navbar__link:nth-child(3) { animation-delay: 470ms; }
.navbar__link:nth-child(4) { animation-delay: 530ms; }
.navbar__link:nth-child(5) { animation-delay: 590ms; }
.navbar__link:nth-child(6) { animation-delay: 650ms; }

@keyframes navLinkEnter {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.navbar__actions {
  animation: navLinkEnter 500ms var(--ease-out-expo) 720ms both;
}