/* ============================================================
   ARK TRADE — core stylesheet
   Design system: design.md (Monad — warm parchment / editorial
   serif @400 + mono UI / single Lake Blue accent / hairline Ash)
   Layout + interaction: layout.md, layout2.md, layout3.md
   ============================================================ */

/* ---------- 1. TOKENS ---------- */
:root {
  /* Colors */
  --color-parchment: #f6f3f1;
  --color-lake-blue: #2b59d1;
  --color-periwinkle-mist: #cfdaf5;
  --color-sky-blue: #a0b5eb;
  --color-mint: #a7fccd;
  --color-coral: #ff9473;
  --color-gold: #ecda98;
  --color-crimson: #f37a0a;
  --color-off-black: #242424;
  --color-ink: #000000;
  --color-graphite: #4e4d4d;
  --color-smoke: #797776;
  --color-ash: #cecac8;

  /* Families — Newsreader / IBM Plex Mono are the design.md substitutes */
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-serif: "Newsreader", ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;

  /* Type scale — fluid via clamp (layout3.md), anchored to design.md sizes */
  --text-caption: 12px;
  --text-body-sm: 14px;
  --text-body: 16px;
  --text-label: 18px;
  --text-body-lg: clamp(17px, 1.3vw, 20px);
  --text-subheading: clamp(21px, 1.7vw, 24px);
  --text-heading-sm: clamp(26px, 2.4vw, 32px);
  --text-heading: clamp(30px, 3vw, 40px);
  --text-heading-lg: clamp(33px, 4vw, 48px);
  --text-display: clamp(42px, 6.4vw, 80px);

  /* Spacing */
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-40: 40px;
  --spacing-64: 64px;
  --spacing-72: 72px;
  --spacing-80: 80px;

  /* Layout */
  --page-max-width: 1432px;
  --gutter: clamp(20px, 3.4vw, 48px);
  --section-gap: clamp(64px, 8vw, 128px);
  --card-padding: clamp(24px, 2.8vw, 40px);

  /* Radius */
  --radius-cards: 40px;
  --radius-buttons: 100px;
  --radius-pills: 9999px;
  --radius-media: 26px;

  /* Motion */
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-in: cubic-bezier(.7, 0, .84, 0);
  --stagger: 72ms;

  --nav-h: 80px;
}

/* ---------- 2. RESET / BASE ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--color-parchment);
  color: var(--color-off-black);
  font-family: var(--font-mono);
  font-size: var(--text-body);
  line-height: 1.35;
  letter-spacing: -0.025em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
body.nav-open { overflow: hidden; }

img, svg, video { display: block; max-width: 100%; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }

/* Headings: serif, weight locked at 400 — never bold (design.md) */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

::selection { background: var(--color-lake-blue); color: #fff; }

:focus-visible {
  outline: 2px solid var(--color-lake-blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--color-off-black); color: #fff;
  padding: 12px 20px; border-radius: 0 0 12px 0;
  font-size: var(--text-caption); text-transform: uppercase; letter-spacing: 0.08em;
}
.skip-link:focus { left: 0; }

/* ---------- 3. LAYOUT HELPERS ---------- */
.wrap {
  width: 100%;
  max-width: var(--page-max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: 1040px; }

.section { padding-block: var(--section-gap); }
.section--tight { padding-block: clamp(48px, 5.5vw, 80px); }
.section + .section { padding-top: 0; }
.section--bordered { border-top: 1px solid var(--color-ash); padding-top: var(--section-gap); }
.section + .section--bordered { padding-top: var(--section-gap); }

/* Eyebrow / micro-label — mono, uppercase, tight tracking */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-smoke);
  margin-bottom: var(--spacing-24);
}
.eyebrow::before {
  content: ""; width: 24px; height: 1px;
  background: var(--color-ash); flex: 0 0 auto;
}
.eyebrow--plain::before { display: none; }

.section-head { max-width: 780px; margin-bottom: clamp(40px, 5vw, 72px); }
.section-head h2 { font-size: var(--text-heading-lg); }
.section-head h2 + .lede { margin-top: var(--spacing-24); }

.lede {
  font-size: var(--text-body-lg);
  line-height: 1.55;
  color: var(--color-graphite);
  max-width: 62ch;
}
.lede + .lede { margin-top: 1.1em; }

.muted { color: var(--color-graphite); }
.rule { height: 1px; background: var(--color-ash); border: 0; }

/* ---------- 4. BUTTONS ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px;
  padding: 14px 30px;
  border-radius: var(--radius-buttons);
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: var(--text-body-sm);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color .25s ease, color .25s ease, border-color .25s ease, transform .25s var(--ease-out);
}
.btn:active { transform: scale(.975); }
.btn svg { width: 14px; height: 14px; flex: 0 0 auto; }

/* The ONE saturated fill — a single primary action per screen (design.md) */
.btn--primary { background: var(--color-lake-blue); color: #fff; }
.btn--primary:hover { background: #2249ad; }

.btn--dark { background: var(--color-off-black); color: #fff; }
.btn--dark:hover { background: #000; }

.btn--ghost { background: transparent; border-color: var(--color-off-black); color: var(--color-off-black); }
.btn--ghost:hover { background: var(--color-off-black); color: #fff; }

.btn--on-dark { background: transparent; border-color: rgba(255,255,255,.42); color: #fff; }
.btn--on-dark:hover { background: #fff; color: var(--color-off-black); border-color: #fff; }

.btn--light { background: var(--color-parchment); color: var(--color-off-black); }
.btn--light:hover { background: #fff; }

.btn-row { display: flex; flex-wrap: wrap; gap: var(--spacing-16); }

/* Text link with trailing arrow */
.arrow-link {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: var(--text-body-sm);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  color: var(--color-off-black);
  padding-block: 4px;
  transition: gap .25s var(--ease-out), color .2s ease;
}
.arrow-link svg { width: 14px; height: 14px; }
.arrow-link:hover { gap: 16px; color: var(--color-lake-blue); }
.arrow-link--on-dark { color: #fff; }
.arrow-link--on-dark:hover { color: var(--color-sky-blue); }

/* ---------- 5. NAVBAR (scroll-aware — layout.md) ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background-color .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
  background: transparent;
}
.nav.is-scrolled {
  background: rgba(246, 243, 241, .9);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--color-ash);
}
.nav__bar {
  position: relative;
  display: flex; align-items: center; gap: var(--spacing-32);
  height: 64px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand__mark { width: 31px; height: 26px; flex: 0 0 auto; }
.brand__name {
  font-family: var(--font-mono);
  font-size: 17px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.14em;
  white-space: nowrap;
}
.brand__name em { font-style: normal; color: var(--color-smoke); }

.nav__links {
  display: flex; align-items: center; gap: clamp(18px, 2.1vw, 34px);
  margin-left: clamp(16px, 3vw, 56px);
}
.nav__links a {
  position: relative;
  font-size: var(--text-body-sm);
  text-transform: uppercase; letter-spacing: -0.02em;
  color: var(--color-off-black);
  opacity: .78;
  padding-block: 6px;
  transition: opacity .2s ease;
}
.nav__links a:hover { opacity: 1; }
.nav__links a[aria-current="page"] { opacity: 1; }
.nav__links a[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: var(--color-lake-blue);
}

.nav__actions { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.nav__actions .btn { min-height: 42px; padding: 11px 22px; font-size: var(--text-caption); }

/* Burger — fixed sibling of .nav so its z-index is measured against the sheet,
   not trapped inside the nav's own stacking context (layout2.md). Doubles as close. */
.burger {
  appearance: none; border: 0; background: transparent; color: inherit;
  padding: 0; cursor: pointer;
  display: none; flex-direction: column; justify-content: center; gap: 6px;
  position: fixed; top: 0; right: var(--gutter); z-index: 70;
  height: 64px;
  transition: color .35s ease;
}
.burger span {
  display: block; width: 28px; height: 2px; border-radius: 2px;
  background: currentColor; transform-origin: center;
  transition: transform .55s var(--ease-out), opacity .25s ease, width .45s var(--ease-out);
}
.burger:hover span:nth-child(2) { width: 20px; }
.burger.is-active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.burger.is-active span:nth-child(2) { opacity: 0; transform: scaleX(.2); }
.burger.is-active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.burger.is-active:hover span:nth-child(2) { width: 28px; }
.burger.is-active { color: var(--color-off-black); }
.burger.is-active.burger--on-panel { color: #fff; }

/* ---------- 6. NAV SHEET (layout2.md) ---------- */
.navsheet {
  position: fixed; inset: 0; z-index: 60;
  visibility: hidden;
  transition: visibility 0s linear .46s;
}
.navsheet.is-open { visibility: visible; transition: visibility 0s linear 0s; }

.navsheet__scrim {
  position: absolute; inset: 0;
  background: rgba(20, 18, 17, .45);
  opacity: 0;
  -webkit-backdrop-filter: blur(0px); backdrop-filter: blur(0px);
  transition: opacity .32s ease, backdrop-filter .32s ease, -webkit-backdrop-filter .32s ease;
}
.navsheet.is-open .navsheet__scrim {
  opacity: 1;
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  transition: opacity .5s ease, backdrop-filter .6s ease, -webkit-backdrop-filter .6s ease;
}

.navsheet__panel {
  position: absolute; top: 0; right: 0; bottom: 0;
  width: min(100%, 460px);
  display: flex; flex-direction: column;
  padding: calc(var(--gutter) + 78px) clamp(24px, 6vw, 52px) calc(var(--gutter) + 12px);
  padding-bottom: max(calc(var(--gutter) + 12px), env(safe-area-inset-bottom));
  background: rgba(24, 23, 22, .92);
  -webkit-backdrop-filter: blur(26px) saturate(150%); backdrop-filter: blur(26px) saturate(150%);
  border-left: 1px solid rgba(255,255,255,.08);
  box-shadow: -30px 0 80px rgba(0,0,0,.35);
  color: #fff;
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  transform: translateX(100%);
  transition: transform .44s var(--ease-in);
}
/* Asymmetric on purpose: 680ms expo-out in, 440ms expo-in out */
.navsheet.is-open .navsheet__panel { transform: translateX(0); transition: transform .68s var(--ease-out); }

.navsheet__list li { border-top: 1px solid rgba(255,255,255,.13); }
.navsheet__list li:last-child { border-bottom: 1px solid rgba(255,255,255,.13); }

.navsheet__link {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: clamp(13px, 2.1vh, 19px) 2px;
  color: #fff;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 6vw, 2rem);
  letter-spacing: -.02em; line-height: 1.1;
  opacity: 0; transform: translateY(22px);
  transition: opacity .16s ease, transform .16s ease, color .25s ease;
}
.navsheet.is-open .navsheet__link {
  opacity: 1; transform: translateY(0);
  transition: opacity .6s var(--ease-out), transform .6s var(--ease-out), color .25s ease;
  transition-delay: calc(.16s + var(--i) * .062s), calc(.16s + var(--i) * .062s), 0s;
}
.navsheet__link svg {
  width: 22px; height: 22px; flex: 0 0 auto;
  opacity: 0; transform: translateX(-10px);
  transition: opacity .35s var(--ease-out), transform .35s var(--ease-out);
}
.navsheet__link:hover, .navsheet__link:focus-visible { color: var(--color-sky-blue); }
.navsheet__link:hover svg, .navsheet__link:focus-visible svg { opacity: 1; transform: translateX(0); }
.navsheet__link:focus-visible { outline: none; text-decoration: underline; text-underline-offset: 8px; }

.navsheet__foot {
  margin-top: auto; padding-top: clamp(24px, 5vh, 44px);
  opacity: 0; transform: translateY(22px);
  transition: opacity .16s ease, transform .16s ease;
}
.navsheet.is-open .navsheet__foot {
  opacity: 1; transform: translateY(0);
  transition: opacity .6s var(--ease-out), transform .6s var(--ease-out);
  transition-delay: .42s;
}
.navsheet__meta {
  margin-top: clamp(20px, 4vh, 32px);
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .1em;
  color: rgba(255,255,255,.5);
  line-height: 1.9;
}

/* ---------- 7. HERO (two-column grid — layout2.md) ---------- */
.hero {
  position: relative;
  min-height: 100vh; min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
  gap: clamp(24px, 3vw, 56px);
  align-items: center;
  padding: calc(var(--nav-h) + 24px) var(--gutter) clamp(40px, 5vh, 72px);
  overflow: hidden;
}
.hero__inner { max-width: calc(var(--page-max-width) / 2); }

/* Gradient atmospheric washes — decorative only, heavily blurred (design.md) */
.wash {
  position: absolute; z-index: 0; pointer-events: none;
  border-radius: 50%; filter: blur(75px);
  opacity: .55;
}
.wash--a {
  width: 46vw; height: 46vw; max-width: 620px; max-height: 620px;
  top: -14%; left: -12%;
  background: radial-gradient(circle at 40% 40%, rgba(160,181,235,.8), rgba(207,218,245,0) 68%);
}
.wash--b {
  width: 38vw; height: 38vw; max-width: 520px; max-height: 520px;
  bottom: -18%; left: 22%;
  background: radial-gradient(circle at 50% 50%, rgba(255,148,115,.5), rgba(236,218,152,0) 70%);
}

.hero__left { position: relative; }
.hero__title { font-size: var(--text-display); }
.hero__title .line { display: block; }
.hero__text {
  margin-top: clamp(20px, 3vh, 32px);
  max-width: 46ch;
  color: var(--color-graphite);
  font-size: var(--text-body-lg);
  line-height: 1.6;
}
.hero .btn-row { margin-top: clamp(28px, 4vh, 44px); }

.hero__meta {
  display: flex; flex-wrap: wrap; gap: clamp(20px, 3vw, 48px);
  margin-top: clamp(36px, 5vh, 64px);
  padding-top: var(--spacing-24);
  border-top: 1px solid var(--color-ash);
}
.hero__meta div { min-width: 0; }
.hero__meta dt {
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--color-smoke); margin-bottom: 8px;
}
.hero__meta dd { font-family: var(--font-serif); font-size: var(--text-subheading); }

/* ---------- 8. MEDIA CARD + MARKERS (layout2.md) ---------- */
.hero__media {
  position: relative;
  isolation: isolate;
  border-radius: var(--radius-media);
  overflow: hidden;
  border: 1px solid var(--color-ash);
  background: #fbfaf9;
  min-width: 0;
  aspect-ratio: 4 / 5;
  max-height: 78vh;
  align-self: center;
}
.hero__map { position: absolute; inset: 0; width: 100%; height: 100%; }

.marker { position: absolute; z-index: 3; --dot-r: 15px; }
.marker__dot {
  position: absolute;
  left: calc(var(--dot-r) * -1); top: calc(var(--dot-r) * -1);
  width: calc(var(--dot-r) * 2); height: calc(var(--dot-r) * 2);
  border: 3px solid var(--color-off-black);
  background: rgba(246,243,241,.55);
  border-radius: 50%;
}
.marker__dot::after {
  content: ""; position: absolute; inset: 4px;
  border-radius: 50%; background: var(--color-lake-blue);
}
.marker__line {
  position: absolute; left: 0; top: -1px;
  width: 56px; height: 2px;
  background: var(--color-off-black); border-radius: 2px;
  transform-origin: 0 50%; transform: rotate(212deg);
  clip-path: inset(0 0 0 var(--dot-r));
}
.marker__label {
  position: absolute; right: 46px; bottom: 26px;
  white-space: nowrap;
  background: var(--color-parchment);
  border: 1px solid var(--color-ash);
  color: var(--color-off-black);
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .06em;
  padding: .7em 1.1em;
  border-radius: var(--radius-pills);
}
.marker--right .marker__line { transform: rotate(-32deg); }
.marker--right .marker__label { right: auto; left: 46px; }

.marker--source { left: 52%; top: 20%; }
.marker--hub    { left: 44%; top: 50%; }
.marker--market { left: 28%; top: 78%; }

/* Corner pill notched into the card (layout2.md social pill pattern) */
.media__stat {
  position: absolute; right: 0; bottom: 0; z-index: 3;
  display: flex; align-items: baseline; gap: 10px;
  background: var(--color-parchment);
  border-top: 1px solid var(--color-ash);
  border-left: 1px solid var(--color-ash);
  padding: clamp(14px, 1.5vw, 20px) clamp(18px, 2.2vw, 28px);
  border-top-left-radius: 30px;
  border-bottom-right-radius: var(--radius-media);
}
.media__stat b { font-family: var(--font-serif); font-weight: 400; font-size: var(--text-subheading); }
.media__stat span {
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--color-smoke);
}

/* ---------- 9. PAGE HEADER (inner pages) ---------- */
.pagehead {
  position: relative;
  padding: calc(var(--nav-h) + clamp(56px, 9vw, 128px)) 0 clamp(48px, 6vw, 88px);
  border-bottom: 1px solid var(--color-ash);
  overflow: hidden;
}
.pagehead__inner { position: relative; z-index: 1; max-width: 900px; }
.pagehead h1 { font-size: var(--text-display); }
.pagehead .lede { margin-top: clamp(20px, 3vw, 32px); font-size: var(--text-body-lg); }
.pagehead .btn-row { margin-top: clamp(28px, 4vw, 40px); }

/* ---------- 10. MARQUEE (movement) ---------- */
.marquee {
  border-block: 1px solid var(--color-ash);
  overflow: hidden;
  padding-block: 18px;
  background: var(--color-parchment);
}
.marquee__track {
  display: flex; width: max-content;
  animation: marquee 38s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__group {
  display: flex; align-items: center; gap: clamp(24px, 3vw, 48px);
  padding-right: clamp(24px, 3vw, 48px);
  flex: 0 0 auto;
}
.marquee__group span {
  font-size: var(--text-body-sm);
  text-transform: uppercase; letter-spacing: .06em;
  color: var(--color-graphite);
  white-space: nowrap;
}
.marquee__group i {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--color-lake-blue); flex: 0 0 auto;
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- 11. CARDS & GRIDS ---------- */
.grid { display: grid; gap: var(--spacing-24); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* Feature card — hairline border, 40px radius, no shadow (design.md) */
.card {
  position: relative;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  background: transparent;
  display: flex; flex-direction: column;
  transition: background-color .3s ease, border-color .3s ease, transform .3s var(--ease-out);
}
.card__num {
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--color-smoke);
  margin-bottom: var(--spacing-24);
}
.card h3 { font-size: var(--text-subheading); }
.card p {
  margin-top: 14px;
  color: var(--color-graphite);
  font-size: var(--text-body);
  line-height: 1.55;
}
.card__foot { margin-top: auto; padding-top: var(--spacing-24); }
a.card:hover, .card--hover:hover { background: rgba(207,218,245,.28); border-color: var(--color-sky-blue); }

/* The one colored surface that draws the eye (design.md) */
.card--feature {
  background: var(--color-periwinkle-mist);
  border-color: transparent;
  overflow: hidden;
}
.card--feature p { color: #33406b; }
.card--dark { background: var(--color-off-black); border-color: transparent; color: #fff; }
.card--dark p { color: rgba(255,255,255,.72); }
.card--dark .card__num { color: rgba(255,255,255,.5); }

.card__icon {
  width: 34px; height: 34px;
  margin-bottom: var(--spacing-24);
  color: var(--color-off-black);
}
.card--dark .card__icon { color: #fff; }

/* Numbered process rows */
.steps { border-top: 1px solid var(--color-ash); }
.step {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) minmax(0, 1.25fr);
  gap: clamp(16px, 3vw, 48px);
  align-items: start;
  padding-block: clamp(28px, 3.4vw, 44px);
  border-bottom: 1px solid var(--color-ash);
}
.step__num {
  font-size: var(--text-body-sm);
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--color-smoke);
  padding-top: 6px;
}
.step h3 { font-size: var(--text-heading-sm); }
.step p { color: var(--color-graphite); font-size: var(--text-body); line-height: 1.6; }

/* Checklist */
.ticklist { display: grid; gap: 12px; }
.ticklist li {
  display: flex; align-items: flex-start; gap: 12px;
  font-size: var(--text-body);
  color: var(--color-graphite);
  line-height: 1.5;
}
.ticklist li::before {
  content: ""; flex: 0 0 auto;
  width: 7px; height: 7px; margin-top: 7px;
  border-radius: 50%;
  border: 1px solid var(--color-lake-blue);
  background: var(--color-lake-blue);
}
.ticklist--open li::before { background: transparent; }

/* Split panel: two columns of requirements */
.split {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px; background: var(--color-ash);
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-cards);
  overflow: hidden;
}
.split > div { background: var(--color-parchment); padding: var(--card-padding); }
.split h3 { font-size: var(--text-subheading); margin-bottom: var(--spacing-24); }

/* Region rows */
.regions { border-top: 1px solid var(--color-ash); }
.region {
  display: grid;
  grid-template-columns: 44px minmax(0, .8fr) minmax(0, 1.4fr) auto;
  gap: clamp(16px, 2.6vw, 40px);
  align-items: center;
  padding-block: clamp(24px, 2.6vw, 34px);
  border-bottom: 1px solid var(--color-ash);
}
.region__idx { font-size: var(--text-caption); color: var(--color-smoke); letter-spacing: .1em; }
.region h3 { font-size: var(--text-heading-sm); }
.region p { color: var(--color-graphite); line-height: 1.55; }
.tag {
  display: inline-flex; align-items: center;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-pills);
  padding: 8px 16px;
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--color-graphite);
  white-space: nowrap;
}
.tag--accent { border-color: var(--color-lake-blue); color: var(--color-lake-blue); }

/* ---------- 12. TRADE MODEL FLOW (design.md pipeline diagram) ---------- */
.flow {
  display: grid;
  grid-template-columns: minmax(0,1fr) 56px minmax(0,1.15fr) 56px minmax(0,1fr);
  align-items: stretch;
  gap: 0;
}
.flow__col {
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  display: flex; flex-direction: column;
}
.flow__col--mid {
  background: var(--color-off-black);
  border-color: transparent;
  color: #fff;
}
.flow__label {
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .12em;
  color: var(--color-smoke);
  margin-bottom: 10px;
}
.flow__col--mid .flow__label { color: rgba(255,255,255,.55); }
.flow__col h3 { font-size: var(--text-heading-sm); margin-bottom: var(--spacing-24); }

.nodes { display: flex; flex-wrap: wrap; gap: 10px; }
/* Pill node: parchment fill, 1px ash border, full pill, icon + mono uppercase */
.node {
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--color-parchment);
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-pills);
  padding: 11px 18px;
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .05em;
  color: var(--color-off-black);
  white-space: nowrap;
}
.node svg { width: 13px; height: 13px; flex: 0 0 auto; color: var(--color-lake-blue); }
.flow__col--mid .node {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.22);
  color: #fff;
}
.flow__col--mid .node svg { color: var(--color-sky-blue); }

/* Connector between columns */
.flow__link {
  position: relative;
  display: grid; place-items: center;
}
.flow__link::before {
  content: ""; position: absolute;
  left: 0; right: 0; top: 50%;
  height: 1px; background: var(--color-ash);
}
.flow__link svg {
  position: relative;
  width: 20px; height: 20px;
  background: var(--color-parchment);
  color: var(--color-off-black);
  padding: 2px;
}

/* Soft green normalisation glow behind the hub (design.md) */
.flow__col--mid { position: relative; overflow: hidden; }
.flow__col--mid::before {
  content: ""; position: absolute;
  width: 300px; height: 300px; border-radius: 50%;
  right: -110px; top: -110px;
  background: radial-gradient(circle, rgba(167,252,205,.18), rgba(167,252,205,0) 70%);
  filter: blur(30px); pointer-events: none;
}
.flow__col--mid > * { position: relative; }

/* ---------- 13. DARK BAND ---------- */
.band {
  background: var(--color-off-black);
  color: #fff;
  border-radius: var(--radius-cards);
  padding: clamp(32px, 5vw, 80px);
  position: relative; overflow: hidden;
}
.band h2 { font-size: var(--text-heading-lg); }
.band .lede { color: rgba(255,255,255,.72); }
.band .eyebrow { color: rgba(255,255,255,.55); }
.band .eyebrow::before { background: rgba(255,255,255,.3); }
.band__grid {
  display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr);
  gap: clamp(28px, 4vw, 72px); align-items: start;
}
.band > .band__wash {
  position: absolute; pointer-events: none;
  width: 480px; height: 480px; border-radius: 50%;
  right: -140px; bottom: -220px;
  background: radial-gradient(circle, rgba(43,89,209,.55), rgba(43,89,209,0) 68%);
  filter: blur(60px);
}
.band > * { position: relative; }

/* ---------- 14. CTA STRIP ---------- */
.cta-strip {
  border-top: 1px solid var(--color-ash);
  padding-block: clamp(56px, 7vw, 104px);
}
.cta-strip__inner {
  display: flex; flex-wrap: wrap; align-items: flex-end;
  justify-content: space-between; gap: var(--spacing-32);
}
.cta-strip h2 { font-size: var(--text-heading-lg); max-width: 18ch; }

/* ---------- 15. FORMS ---------- */
.form { display: grid; gap: var(--spacing-24); }
.form__row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--spacing-24); }
.field { display: grid; gap: 10px; min-width: 0; }
.field > label, .fieldset > legend {
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--color-smoke);
}
.field input, .field select, .field textarea {
  width: 100%;
  background: transparent;
  border: 1px solid var(--color-ash);
  border-radius: 16px;
  padding: 15px 18px;
  font-family: var(--font-mono);
  font-size: var(--text-body);
  color: var(--color-off-black);
  transition: border-color .2s ease, background-color .2s ease;
}
.field textarea { min-height: 148px; resize: vertical; border-radius: 22px; }
.field input::placeholder, .field textarea::placeholder { color: var(--color-smoke); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--color-lake-blue); background: rgba(207,218,245,.18);
}
.field select { appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234e4d4d' stroke-width='1.6'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 16px center; background-size: 16px;
  padding-right: 44px;
}
.field__file {
  border: 1px dashed var(--color-ash);
  border-radius: 22px; padding: 22px 18px;
  font-size: var(--text-body-sm); color: var(--color-smoke);
  text-align: center; cursor: pointer;
  transition: border-color .2s ease, color .2s ease;
}
.field__file:hover { border-color: var(--color-lake-blue); color: var(--color-graphite); }
.field__file input { position: absolute; width: 1px; height: 1px; opacity: 0; }

.fieldset { border: 0; display: grid; gap: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { position: relative; }
.chip input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.chip span {
  display: inline-flex; align-items: center;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-pills);
  padding: 11px 20px;
  font-size: var(--text-body-sm);
  color: var(--color-graphite);
  cursor: pointer;
  transition: border-color .2s ease, background-color .2s ease, color .2s ease;
}
.chip input:hover + span { border-color: var(--color-smoke); }
.chip input:checked + span {
  background: var(--color-off-black); border-color: var(--color-off-black); color: #fff;
}
.chip input:focus-visible + span { outline: 2px solid var(--color-lake-blue); outline-offset: 3px; }

.form__note { font-size: var(--text-body-sm); color: var(--color-smoke); line-height: 1.6; }
.form__status {
  border: 1px solid var(--color-lake-blue);
  background: rgba(207,218,245,.3);
  border-radius: 20px; padding: 18px 22px;
  font-size: var(--text-body-sm); color: var(--color-off-black);
}
.form__status[hidden] { display: none; }

/* ---------- 16. FOOTER ---------- */
.footer {
  background: var(--color-ink);
  color: #fff;
  padding-block: clamp(56px, 6vw, 88px) var(--spacing-32);
  margin-top: var(--section-gap);
}
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 64px);
  padding-bottom: clamp(40px, 5vw, 64px);
  border-bottom: 1px solid rgba(255,255,255,.14);
}
.footer h2 { font-size: var(--text-heading-sm); max-width: 16ch; }
.footer__blurb { margin-top: var(--spacing-16); color: rgba(255,255,255,.6); font-size: var(--text-body-sm); line-height: 1.7; max-width: 40ch; }
.footer__col h3 {
  font-family: var(--font-mono); font-weight: 500;
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .12em;
  color: rgba(255,255,255,.5);
  margin-bottom: var(--spacing-24);
}
.footer__col li + li { margin-top: 12px; }
.footer__col a {
  font-size: var(--text-body-sm); color: rgba(255,255,255,.82);
  transition: color .2s ease;
}
.footer__col a:hover { color: #fff; }
.footer__bottom {
  display: flex; flex-wrap: wrap; gap: var(--spacing-16);
  justify-content: space-between; align-items: center;
  padding-top: var(--spacing-32);
  font-size: var(--text-caption);
  text-transform: uppercase; letter-spacing: .08em;
  color: rgba(255,255,255,.45);
}
.footer__bottom a:hover { color: #fff; }
.group-link { display: inline-flex; align-items: center; gap: 8px; color: rgba(255,255,255,.82); }
.group-link:hover { color: #fff; }

/* ---------- 17. ANIMATION SYSTEM (layout2.md --d stagger) ---------- */
@keyframes fade-up   { from { opacity: 0; transform: translate3d(0, 18px, 0); } to { opacity: 1; transform: none; } }
@keyframes fade-down { from { opacity: 0; transform: translate3d(0, -12px, 0); } to { opacity: 1; transform: none; } }
@keyframes media-in  { from { opacity: 0; transform: translate3d(28px, 0, 0); } to { opacity: 1; transform: none; } }
@keyframes pop-in    { from { opacity: 0; transform: scale(.72); } to { opacity: 1; transform: scale(1); } }
@keyframes draw-line       { from { opacity: 0; transform: rotate(212deg) scaleX(0); } to { opacity: 1; transform: rotate(212deg) scaleX(1); } }
@keyframes draw-line-right { from { opacity: 0; transform: rotate(-32deg) scaleX(0); } to { opacity: 1; transform: rotate(-32deg) scaleX(1); } }
@keyframes dash { to { stroke-dashoffset: -240; } }

.anim {
  animation: fade-up .82s var(--ease-out) backwards;
  animation-delay: calc(var(--d, 0) * var(--stagger));
}
.anim--down { animation-name: fade-down; animation-duration: .7s; }
.hero__media.anim { animation-name: media-in; animation-duration: 1.05s; }
.marker__dot.anim { animation-name: pop-in; animation-duration: .62s; }
.marker__label.anim { animation-duration: .7s; }
.marker__line.anim { animation-name: draw-line; animation-duration: .55s; }
.marker--right .marker__line.anim { animation-name: draw-line-right; }

/* Animated flow lines on the hero map */
.hero__map .flowline {
  stroke-dasharray: 5 9;
  animation: dash 5.5s linear infinite;
}

/* Scroll reveal */
.reveal { opacity: 0; transform: translate3d(0, 22px, 0); }
.reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  transition-delay: calc(var(--d, 0) * 68ms);
}
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- 18. RESPONSIVE ---------- */
@media (max-width: 1180px) {
  .nav__links { gap: 18px; margin-left: 20px; }
  .flow { grid-template-columns: minmax(0,1fr) 40px minmax(0,1.1fr) 40px minmax(0,1fr); }
}

/* Nav links collapse to the burger */
@media (max-width: 1080px) {
  .nav__links, .nav__actions { display: none; }
  .burger { display: flex; }
  .hero { grid-template-columns: minmax(0, 1fr) minmax(0, .8fr); }
  .marker--source { left: 50%; top: 20%; }
  .marker--hub    { left: 42%; top: 50%; }
  .marker--market { left: 26%; top: 78%; }
  .marker__line { width: 44px; }
  .marker { --dot-r: 12px; }
  .marker__label { right: 34px; bottom: 22px; }
  .marker--right .marker__label { right: auto; left: 34px; }
}

@media (max-width: 1000px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .region { grid-template-columns: 32px minmax(0, .9fr) minmax(0, 1.6fr); }
  .region .tag { grid-column: 2 / -1; justify-self: start; }
  .band__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Flow diagram stacks vertically — matches the brief's Source ↓ ARK ↓ Market */
@media (max-width: 900px) {
  .flow { grid-template-columns: minmax(0, 1fr); }
  .flow__link { height: 56px; }
  .flow__link::before { left: 50%; right: auto; top: 0; bottom: 0; width: 1px; height: auto; }
  .flow__link svg { transform: rotate(90deg); }
  .step { grid-template-columns: 64px minmax(0, 1fr); }
  .step p { grid-column: 2; }
  .split { grid-template-columns: minmax(0, 1fr); }
}

/* Hero stacks; media card sits under the copy */
@media (max-width: 860px) {
  .hero {
    display: block;
    min-height: 0;
    padding-top: calc(var(--nav-h) + clamp(28px, 8vw, 56px));
    padding-bottom: clamp(48px, 8vw, 72px);
  }
  .hero__inner { max-width: none; }
  .hero__media {
    margin-top: clamp(40px, 7vw, 64px);
    aspect-ratio: 5 / 4;
    max-height: none;
  }
  .hero__text { max-width: 54ch; }
  .marker--source { left: 54%; top: 21%; }
  .marker--hub    { left: 44%; top: 50%; }
  .marker--market { left: 28%; top: 78%; }
}

@media (max-width: 720px) {
  :root { --gutter: 20px; --radius-cards: 28px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .form__row { grid-template-columns: minmax(0, 1fr); }
  .cta-strip__inner { align-items: flex-start; }
  .cta-strip h2 { max-width: none; }
  .hero__meta { gap: 20px 32px; }
  .hero__meta div { flex: 1 1 40%; }
  .btn { width: 100%; }
  .btn-row { flex-direction: column; align-items: stretch; }
  .nav__bar { height: 60px; }
  .burger { height: 60px; }
  .media__stat { border-bottom-right-radius: var(--radius-media); }
}

@media (max-width: 560px) {
  .hero__media { aspect-ratio: 1 / 1; }
  .marker__label { font-size: 10px; padding: .55em .9em; }
  .marker__line { width: 34px; }
  .region { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .region__idx { display: none; }
  .step { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .step p { grid-column: 1; }
  .footer__top { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 380px) {
  :root { --gutter: 16px; }
  .brand__name { font-size: 15px; letter-spacing: .1em; }
  .burger span { width: 26px; }
  .marker__label { display: none; }
}

/* Short viewports must never be forced into a scroll by the hero */
@media (max-height: 620px) {
  .hero { min-height: 0; }
}

@media (max-width: 1024px) and (orientation: landscape) and (max-height: 540px) {
  .hero { min-height: 0; padding-top: calc(var(--nav-h) + 20px); }
  .hero__title { font-size: clamp(1.6rem, 6.4vh, 2.3rem); }
  .hero__text { font-size: 14px; margin-top: 12px; }
  .hero .btn-row { margin-top: 18px; }
  .hero__meta { margin-top: 24px; }
  .navsheet__panel { padding-top: calc(var(--gutter) + 64px); }
  .navsheet__link { font-size: clamp(1.1rem, 4.6vh, 1.5rem); padding: 10px 2px; }
  .navsheet__foot { padding-top: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
    scroll-behavior: auto !important;
  }
  .anim { animation: none !important; opacity: 1 !important; transform: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .navsheet__link, .navsheet__foot { transform: none; }
  .marquee__track { animation: none; }
}

@media print {
  .nav, .navsheet, .marquee, .burger { display: none !important; }
  body { background: #fff; }
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ---------- 19. HERO MEDIA WASHES ---------- */
/* Soft normalisation glow behind the ARK hub node + a periwinkle corner wash */
.hero__media::before,
.hero__media::after {
  content: ""; position: absolute; z-index: 1;
  border-radius: 50%; pointer-events: none; filter: blur(46px);
}
.hero__media::before {
  width: 58%; aspect-ratio: 1; left: 16%; top: 30%;
  background: radial-gradient(circle, rgba(167,252,205,.5), rgba(167,252,205,0) 68%);
}
.hero__media::after {
  width: 62%; aspect-ratio: 1; right: -16%; top: -14%;
  background: radial-gradient(circle, rgba(207,218,245,.75), rgba(160,181,235,0) 70%);
}
.hero__map { z-index: 2; }
.marker, .media__stat { z-index: 3; }

/* Wide map band: the portrait-tuned washes are too broad at 16:7 */
.hero__media--wide::before { width: 32%; left: 28%; top: 26%; filter: blur(54px); }
.hero__media--wide::after  { width: 34%; right: -8%; top: -26%; filter: blur(54px); }

/* Keep the two qualifying question groups visually distinct */
.form .fieldset + .fieldset { margin-top: 10px; }