/* =========================================================
   QUANTUM EARTH EXCHANGE — SHARED SITE LAYER
   Nav + footer + inner-page components.
   Loaded on every page (including the homepage).
   Depends on tokens from style.css.
   ========================================================= */

:root {
  --accent: var(--lime);
  --accent-rgb: 190, 255, 0;
  --wrap: 1200px;
  --nav-h: 68px;
}

/* Per-page accent */
[data-accent='amber'] { --accent: var(--amber); --accent-rgb: 255, 184, 0; }
[data-accent='lime'] { --accent: var(--lime); --accent-rgb: 190, 255, 0; }
[data-accent='coral'] { --accent: var(--coral); --accent-rgb: 255, 79, 111; }
[data-accent='cyan'] { --accent: var(--cyan); --accent-rgb: 0, 229, 255; }
[data-accent='violet'] { --accent: var(--violet); --accent-rgb: 107, 47, 250; }

/* =========================================================
   NAV — extends .q-nav from style.css
   ========================================================= */
.q-nav {
  right: 0;
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-3) clamp(var(--space-4), 3vw, var(--space-8));
  min-height: var(--nav-h);
  background: transparent;
  transition: background 0.35s ease, backdrop-filter 0.35s ease, border-color 0.35s ease;
  border-bottom: 1px solid transparent;
}

.q-nav.is-stuck {
  background: rgba(10, 10, 10, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

/* While the mobile menu is open the nav must NOT carry a backdrop-filter:
   a backdrop-filter establishes a containing block for fixed-position
   descendants, so the full-screen .q-nav__links panel gets clipped into
   the ~60px nav bar whenever the page is scrolled (is-stuck). The panel
   background is 98% opaque, so the blur isn't missed while open. */
.q-nav.is-open {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom-color: transparent;
}

.q-nav__logo {
  width: 34px;
  height: 34px;
  flex: none;
  opacity: 0.85;
}

.q-nav__links {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-4), 2.2vw, var(--space-8));
  margin-left: auto;
}

.q-nav__link {
  position: relative;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.62);
  padding: var(--space-2) 0;
  white-space: nowrap;
}

.q-nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1);
}

.q-nav__link:hover,
.q-nav__link:focus-visible { color: var(--white); }
.q-nav__link:hover::after { transform: scaleX(1); }

.q-nav__link[aria-current='page'] {
  color: var(--accent);
}
.q-nav__link[aria-current='page']::after { transform: scaleX(1); }

.q-nav__cta {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  background: var(--accent);
  color: var(--black);
}
.q-nav__cta:hover {
  box-shadow: 0 8px 28px rgba(var(--accent-rgb), 0.35);
}

/* Mobile toggle */
.q-nav__toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-full);
  color: var(--white);
}
.q-nav__toggle span,
.q-nav__toggle span::before,
.q-nav__toggle span::after {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.3s ease, opacity 0.2s ease;
}
.q-nav__toggle span::before,
.q-nav__toggle span::after {
  content: '';
  position: absolute;
}
.q-nav__toggle span::before { transform: translateY(-5px); }
.q-nav__toggle span::after { transform: translateY(5px); }
.q-nav.is-open .q-nav__toggle span { transform: rotate(45deg); }
.q-nav.is-open .q-nav__toggle span::before { opacity: 0; }
.q-nav.is-open .q-nav__toggle span::after { transform: rotate(-90deg); }

@media (max-width: 860px) {
  .q-nav__toggle { display: flex; position: relative; z-index: 3; }
  .q-nav__logo { position: relative; z-index: 3; }
  .q-nav__links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-2);
    margin: 0;
    padding: calc(var(--nav-h) + var(--space-8)) clamp(var(--space-6), 8vw, var(--space-12)) var(--space-12);
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    z-index: 2;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .q-nav.is-open .q-nav__links {
    opacity: 1;
    pointer-events: auto;
  }
  .q-nav__link {
    font-family: var(--font-display);
    font-size: clamp(2rem, 9vw, 3rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--white);
    padding: var(--space-3) 0;
    opacity: 0.55;
    transition: opacity 0.3s ease, color 0.3s ease;
  }
  .q-nav__link::after { display: none; }
  .q-nav.is-open .q-nav__link { opacity: 1; }
  .q-nav__link[aria-current="page"] { color: var(--accent, var(--lime)); }
  .q-nav__cta { margin-top: var(--space-8); }
}

/* =========================================================
   LAYOUT PRIMITIVES
   ========================================================= */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
}
.wrap--narrow { max-width: 860px; }

.section {
  position: relative;
  padding: clamp(var(--space-16), 9vw, var(--space-32)) clamp(var(--space-4), 5vw, var(--space-12));
}
.section--tight {
  padding-top: clamp(var(--space-10), 5vw, var(--space-16));
  padding-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}
.section--edge { border-top: 1px solid rgba(255, 255, 255, 0.08); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-5);
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.h-mega {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  text-wrap: balance;
}
.h-sec {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
  text-wrap: balance;
}
.h-sub {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}
.outline {
  color: transparent;
  -webkit-text-stroke: 1.6px var(--white);
}
.accent { color: var(--accent); }
.outline.accent {
  color: transparent;
  -webkit-text-stroke-color: var(--accent);
}
@supports not (-webkit-text-stroke: 1px black) {
  .outline { color: rgba(255, 255, 255, 0.35); }
  .outline.accent { color: var(--accent); opacity: 0.55; }
}

.lede {
  font-size: var(--text-lg);
  font-weight: 300;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.72);
  max-width: 46ch;
}
.body {
  font-size: var(--text-base);
  font-weight: 300;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.68);
  max-width: 58ch;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}
.btn--accent { background: var(--accent); color: var(--black); }
.btn--accent:hover { box-shadow: 0 10px 36px rgba(var(--accent-rgb), 0.35); }
.btn--ghost {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: none;
}

.sources {
  margin-top: var(--space-8);
  font-size: 0.72rem;
  line-height: 1.6;
  font-weight: 300;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.34);
  max-width: 90ch;
}
.sources a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.22);
  text-underline-offset: 2px;
}
.sources a:hover { color: var(--accent); text-decoration-color: currentColor; }

/* =========================================================
   PAGE HERO
   ========================================================= */
.phero {
  position: relative;
  min-height: min(94svh, 900px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  padding: calc(var(--nav-h) + var(--space-16)) clamp(var(--space-4), 5vw, var(--space-12)) clamp(var(--space-12), 6vw, var(--space-24));
  isolation: isolate;
}

.mesh {
  position: absolute;
  inset: -25%;
  z-index: -1;
  opacity: 0.34;
  filter: blur(16px);
  background:
    radial-gradient(ellipse 55% 48% at var(--g1-x) var(--g1-y), var(--accent), transparent 70%),
    radial-gradient(ellipse 48% 58% at var(--g2-x) var(--g2-y), var(--violet), transparent 70%),
    radial-gradient(ellipse 52% 44% at var(--g3-x) var(--g3-y), var(--cyan), transparent 70%);
  animation: meshMove 16s ease-in-out infinite alternate;
  will-change: --g1-x, --g1-y, --g2-x, --g2-y, --g3-x, --g3-y;
}
.mesh--soft { opacity: 0.22; }

.phero::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 55%;
  z-index: -1;
  background: linear-gradient(to top, var(--black) 12%, transparent);
  pointer-events: none;
}

.phero__inner { position: relative; width: 100%; max-width: var(--wrap); margin: 0 auto; }

.phero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.75rem, 0.6rem + 8vw, 8.5rem);
  line-height: 0.9;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}
.phero__title span { display: block; }

.phero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-8);
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.phero__meta div {
  font-size: var(--text-xs);
  font-weight: 300;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}
.phero__meta strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--accent);
  margin-bottom: 2px;
}

/* =========================================================
   STRIP / MARQUEE (accent band)
   ========================================================= */
.strip {
  overflow: hidden;
  background: var(--accent);
  padding: var(--space-3) 0;
}
.strip--dark { background: var(--black); border-block: 1px solid rgba(255, 255, 255, 0.1); }
.strip__track {
  display: flex;
  width: max-content;
  animation: marqueeScroll 28s linear infinite;
}
.strip__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--black);
  white-space: nowrap;
}
.strip--dark .strip__text { color: rgba(255, 255, 255, 0.55); }

/* =========================================================
   STATS
   ========================================================= */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: var(--space-8) var(--space-6);
}
.stat { border-top: 2px solid rgba(var(--accent-rgb), 0.5); padding-top: var(--space-4); }
.stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 1rem + 3.2vw, 4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--accent);
  margin-bottom: var(--space-3);
}
.stat__label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 300;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.62);
  max-width: 26ch;
}

/* =========================================================
   CARDS
   ========================================================= */
.cards {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}
.card {
  position: relative;
  padding: clamp(var(--space-6), 2.4vw, var(--space-8));
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: border-color 0.35s ease, background 0.35s ease, transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  opacity: 0.1;
  background: radial-gradient(circle at 20% 90%, var(--accent), transparent 68%);
  transition: opacity 0.4s ease;
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--accent-rgb), 0.55);
  background: rgba(255, 255, 255, 0.055);
}
.card:hover::before { opacity: 0.2; }
.card > * { position: relative; z-index: 1; }
.card__num {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: rgba(var(--accent-rgb), 0.85);
  margin-bottom: var(--space-5);
}
.card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}
.card__desc {
  font-size: var(--text-sm);
  font-weight: 300;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.66);
}
.card__list {
  list-style: none;
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.card__list li {
  font-size: var(--text-xs);
  font-weight: 300;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.55);
  padding-left: var(--space-4);
  position: relative;
}
.card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

/* Split feature block */
.split {
  display: grid;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  align-items: start;
}
.split__sticky { position: sticky; top: calc(var(--nav-h) + var(--space-8)); }
@media (max-width: 860px) {
  .split__sticky { position: static; }
}

/* =========================================================
   TIMELINE
   ========================================================= */
.timeline { position: relative; padding-left: var(--space-8); }
.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: rgba(255, 255, 255, 0.14);
}
.timeline__fill {
  position: absolute;
  left: 5px;
  top: 6px;
  width: 1px;
  height: 0;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.7);
}
.tl-item { position: relative; padding-bottom: var(--space-10); }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) + 1px);
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--black);
  border: 2px solid rgba(255, 255, 255, 0.35);
}
.tl-item.is-active::before { border-color: var(--accent); background: var(--accent); }
.tl-item__date {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-2);
}
.tl-item__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.tl-item__desc {
  font-size: var(--text-sm);
  font-weight: 300;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.6);
  max-width: 52ch;
}

/* =========================================================
   CTA BAND
   ========================================================= */
.cta-band {
  background: var(--accent);
  color: var(--black);
  padding: clamp(var(--space-16), 9vw, var(--space-32)) clamp(var(--space-4), 5vw, var(--space-12));
  text-align: center;
  overflow: hidden;
}
.cta-band__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 0.5rem + 7vw, 7rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  color: var(--black);
  margin-bottom: var(--space-5);
}
.cta-band__sub {
  font-size: var(--text-lg);
  font-weight: 300;
  color: rgba(10, 10, 10, 0.72);
  margin: 0 auto var(--space-10);
  max-width: 44ch;
}
.cta-band .btn--black { background: var(--black); color: var(--accent); }
.cta-band__note {
  margin: var(--space-8) auto 0;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(10, 10, 10, 0.55);
}

/* =========================================================
   FOOTER EXTENSIONS
   ========================================================= */
.footer { border-top: 1px solid rgba(255, 255, 255, 0.08); padding-block: var(--space-8); }
.footer__inner { align-items: flex-start; gap: var(--space-8); }
.footer__nav { flex-wrap: wrap; gap: var(--space-3) var(--space-6); max-width: 520px; }
.footer__nav a[aria-current='page'] { color: var(--accent); }

/* =========================================================
   MOTION HOOKS  (only hidden when motion is allowed)
   ========================================================= */
.js-motion .reveal { opacity: 0; transform: translateY(28px); }
.js-motion .reveal-fade { opacity: 0; }
.js-motion .reveal-line { opacity: 0; transform: translateY(40px); }

.scroll-cue {
  position: absolute;
  right: clamp(var(--space-4), 5vw, var(--space-12));
  bottom: clamp(var(--space-8), 5vw, var(--space-16));
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
}
.scroll-cue__line {
  display: block;
  width: 46px;
  height: 1px;
  background: linear-gradient(to right, var(--accent), transparent);
  animation: cueSlide 2.4s ease-in-out infinite;
}
@keyframes cueSlide {
  0%, 100% { transform: translateX(0); opacity: 1; }
  50% { transform: translateX(10px); opacity: 0.4; }
}
@media (max-width: 700px) { .scroll-cue { display: none; } }

@media (prefers-reduced-motion: reduce) {
  .mesh, .strip__track, .scroll-cue__line { animation: none; }
}

/* =========================================================
   HOMEPAGE EXCHANGE CARDS AS LINKS
   (additive — the base card styling stays in style.css)
   ========================================================= */
a.exchange__card {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
a.exchange__card:hover,
a.exchange__card:focus-visible {
  border-color: rgba(255, 255, 255, 0.22);
}
.js-motion a.exchange__card:hover { transform: translateY(-6px); }
a.exchange__card:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 3px;
}
.exchange__card-go {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin-top: var(--space-8);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  transition: color 0.3s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
a.exchange__card:hover .exchange__card-go { transform: translateX(6px); }
.exchange__card--amber:hover .exchange__card-go { color: var(--amber); }
.exchange__card--lime:hover .exchange__card-go { color: var(--lime); }
.exchange__card--coral:hover .exchange__card-go { color: var(--coral); }