*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.modal-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
img, canvas { display: block; max-width: 100%; }

:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.shell {
  width: min(100% - 2rem, 76rem);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  transform: translateY(-150%);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--text);
  color: var(--bg);
  transition: transform var(--duration-fast) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
  transition: border-color var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}
.site-header.is-scrolled { border-color: var(--line); box-shadow: var(--shadow-sm); }
.site-header__inner { display: flex; min-height: 4.75rem; align-items: center; justify-content: space-between; gap: var(--space-2); }

.brand { display: inline-flex; align-items: center; gap: 0.7rem; }
.brand__mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand__copy { display: grid; line-height: 1.1; }
.brand__copy strong { font-size: 0.98rem; letter-spacing: -0.02em; }
.brand__copy small { margin-top: 0.2rem; color: var(--text-muted); font-size: 0.64rem; letter-spacing: 0.08em; text-transform: uppercase; }

.site-nav {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 1rem;
  left: 1rem;
  display: none;
  padding: var(--space-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-md);
}
.site-nav.is-open { display: grid; }
.site-nav a { padding: 0.75rem 0.9rem; border-radius: var(--radius-sm); color: var(--text-soft); font-size: 0.9rem; font-weight: 500; }
.site-nav a:hover { background: var(--bg-subtle); color: var(--text); }

.site-header__actions { display: flex; align-items: center; gap: 0.5rem; }
.icon-button {
  display: inline-grid;
  width: 2.5rem;
  height: 2.5rem;
  cursor: pointer;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  transition: border-color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out), background var(--duration-fast) var(--ease-out);
}
.icon-button:hover { border-color: var(--line-strong); background: var(--bg-subtle); }
.icon-button:active { transform: scale(0.96); }
.icon-button i { font-size: 1.15rem; }

.segmented { display: inline-flex; padding: 0.25rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg-subtle); }
.segmented__button { min-width: 3.5rem; cursor: pointer; border: 0; border-radius: 6px; background: transparent; color: var(--text-muted); font-size: 0.8rem; font-weight: 600; line-height: 2rem; }
.segmented__button[aria-pressed="true"] { background: var(--bg-elevated); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.segmented--compact .segmented__button { min-width: 2rem; padding-inline: 0.4rem; line-height: 1.8rem; }

.hero { position: relative; overflow: hidden; padding: var(--space-10) 0 var(--space-8); }
.hero::before {
  position: absolute;
  top: -16rem;
  left: 50%;
  width: 56rem;
  height: 36rem;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--accent) 11%, transparent), transparent 66%);
  content: "";
  transform: translateX(-50%);
  pointer-events: none;
}
.hero__grid { position: relative; display: grid; gap: var(--space-6); }
.hero__content { align-self: center; }
.eyebrow, .overline, .section-kicker { color: var(--text-muted); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.eyebrow { display: inline-flex; align-items: center; gap: 0.55rem; }
.status-dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--positive); box-shadow: 0 0 0 4px color-mix(in srgb, var(--positive) 14%, transparent); }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.12; text-wrap: balance; }
h1 { margin: var(--space-3) 0; font-size: clamp(2.55rem, 9vw, 5.5rem); letter-spacing: -0.065em; }
h2 { margin: 0.7rem 0 1rem; font-size: clamp(2rem, 6vw, 3.7rem); letter-spacing: -0.055em; }
h3 { letter-spacing: -0.028em; }
.hero__lede { max-width: 42rem; margin-bottom: 0; color: var(--text-soft); font-size: clamp(1.05rem, 2.6vw, 1.3rem); line-height: 1.7; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: var(--space-4); }
.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.7rem 1rem;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform var(--duration-fast) var(--ease-out), background var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
}
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }
.button--primary { background: var(--accent); color: var(--accent-contrast); }
.button--primary:hover { background: var(--accent-hover); }
.button--secondary { border-color: var(--line); background: var(--bg-elevated); color: var(--text); }
.button--secondary:hover { border-color: var(--line-strong); background: var(--bg-subtle); }
.button--large { min-height: 3.5rem; padding-inline: 1.3rem; }
.button--full { width: 100%; }
.hero__disclosure { max-width: 38rem; margin: 0.85rem 0 0; color: var(--text-muted); font-size: 0.74rem; line-height: 1.55; }
.hero__facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: var(--space-5) 0 0; padding: var(--space-2) 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero__facts div { padding: 0.3rem 0.75rem; border-right: 1px solid var(--line); }
.hero__facts div:first-child { padding-left: 0; }
.hero__facts div:last-child { border-right: 0; }
.hero__facts dt { color: var(--text-muted); font-size: 0.68rem; }
.hero__facts dd { margin: 0.3rem 0 0; font-size: 0.82rem; font-weight: 600; }

.watermark { position: relative; isolation: isolate; }
.watermark::after { position: absolute; z-index: -1; right: 1rem; bottom: 0; color: color-mix(in srgb, var(--text) 3%, transparent); content: "KZG"; font-size: clamp(6rem, 18vw, 14rem); font-weight: 700; letter-spacing: -0.1em; line-height: 0.75; pointer-events: none; }

.hero-visual { overflow: hidden; padding: var(--space-3); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--bg-elevated); box-shadow: var(--shadow-md); }
.hero-visual__topline { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-2); }
.hero-visual__topline h2 { max-width: 18rem; margin: 0.4rem 0 0; font-size: 1.35rem; letter-spacing: -0.035em; }
.chart-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem; margin-top: var(--space-3); }
.chart-metrics div { padding: 0.75rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); }
.chart-metrics span { display: block; color: var(--text-muted); font-size: 0.65rem; }
.chart-metrics strong { display: block; margin-top: 0.15rem; font-size: 0.9rem; }
.payoff-chart { position: relative; margin-top: var(--space-2); }
.payoff-chart canvas { width: 100%; height: 15rem; }
.payoff-chart__legend { display: flex; justify-content: flex-end; gap: 1rem; color: var(--text-muted); font-size: 0.65rem; }
.payoff-chart__legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.legend-line { display: inline-block; width: 1rem; height: 2px; background: var(--accent); }
.legend-line--zero { background: var(--line-strong); }
.price-control { display: grid; gap: 0.65rem; margin-top: var(--space-2); }
.price-control > span { display: flex; justify-content: space-between; color: var(--text-muted); font-size: 0.74rem; }
.price-control strong { color: var(--text); }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.payoff-result { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 0.15rem 1rem; margin-top: var(--space-2); padding-top: var(--space-2); border-top: 1px solid var(--line); }
.payoff-result span { color: var(--text-muted); font-size: 0.75rem; }
.payoff-result strong { grid-row: span 2; color: var(--positive); font-size: 1.65rem; }
.payoff-result strong.is-negative { color: var(--negative); }
.payoff-result small { color: var(--text-muted); font-size: 0.64rem; }

.market-strip { padding: var(--space-4) 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-elevated); }
.market-strip__header { display: flex; align-items: center; justify-content: space-between; }
.live-badge { display: inline-flex; align-items: center; gap: 0.45rem; color: var(--text-muted); font-size: 0.65rem; letter-spacing: normal; text-transform: none; }
.live-badge i { width: 0.4rem; height: 0.4rem; border-radius: 50%; background: var(--positive); }
.market-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.5rem; margin-top: var(--space-2); }
.market-card { display: grid; min-height: 5.3rem; align-content: center; padding: 0.85rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); }
.market-card__top { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.market-card__asset { display: flex; min-width: 0; align-items: center; gap: 0.55rem; }
.market-card__icon { display: grid; width: 1.75rem; height: 1.75rem; flex: 0 0 auto; place-items: center; border-radius: 50%; background: var(--bg-subtle); color: var(--text-soft); font-size: 0.72rem; font-weight: 700; }
.market-card__name { display: grid; line-height: 1.2; }
.market-card__name strong { font-size: 0.76rem; }
.market-card__name span { overflow: hidden; color: var(--text-muted); font-size: 0.62rem; text-overflow: ellipsis; white-space: nowrap; }
.market-card__change { font-size: 0.7rem; font-weight: 600; }
.market-card__change.is-up { color: var(--positive); }
.market-card__change.is-down { color: var(--negative); }
.market-card__price { margin-top: 0.5rem; font-family: var(--font-mono); font-size: 0.92rem; font-weight: 600; }
.market-card--skeleton { min-height: 5.3rem; border-color: transparent; background: linear-gradient(90deg, var(--bg-subtle) 25%, var(--bg) 50%, var(--bg-subtle) 75%); background-size: 200% 100%; animation: skeleton 1.4s infinite linear; }
@keyframes skeleton { to { background-position-x: -200%; } }

.section { padding: var(--space-12) 0; }
.section--tinted { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-tint); }
.section-heading { max-width: 48rem; margin-bottom: var(--space-6); }
.section-heading > p { margin-bottom: 0; color: var(--text-soft); font-size: 1.03rem; }
.section-heading--split { display: grid; max-width: none; gap: var(--space-3); }
.section-heading--split > p { align-self: end; max-width: 34rem; }

.timeline { display: grid; gap: 0.75rem; }
.timeline__item { position: relative; display: grid; grid-template-columns: auto 1fr; gap: 0.35rem 0.75rem; padding: var(--space-2); border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg-elevated); }
.timeline__item > span { grid-column: 1 / -1; color: var(--text-muted); font-family: var(--font-mono); font-size: 0.68rem; }
.timeline__item > i { display: grid; width: 2.15rem; height: 2.15rem; place-items: center; border-radius: var(--radius-sm); background: var(--bg-subtle); color: var(--text-soft); font-size: 1.1rem; }
.timeline__item h3 { margin: 0.2rem 0 0; font-size: 1rem; }
.timeline__item p { grid-column: 1 / -1; margin: 0.45rem 0 0; color: var(--text-soft); font-size: 0.78rem; }
.timeline__item--new > i { background: var(--blue-soft); color: var(--blue); }
.timeline__item--active { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); background: var(--accent-soft); }
.timeline__item--active > i { background: var(--bg-elevated); color: var(--accent); }

.callout { display: flex; align-items: flex-start; gap: var(--space-2); margin-top: var(--space-4); padding: var(--space-3); border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg-elevated); }
.callout > i { margin-top: 0.15rem; color: var(--accent); font-size: 1.45rem; }
.callout strong { display: block; margin-bottom: 0.4rem; }
.callout p { margin: 0; color: var(--text-soft); }
.callout--compact { margin-top: var(--space-2); padding: var(--space-2); }
.callout--compact p { font-size: 0.78rem; }
.callout--truth { max-width: 58rem; }

.system-flow { display: grid; gap: 0.65rem; }
.system-node { padding: var(--space-3); border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg-elevated); }
.system-node__index { display: block; color: var(--text-muted); font-family: var(--font-mono); font-size: 0.65rem; }
.system-node > i { display: grid; width: 2.5rem; height: 2.5rem; margin: var(--space-3) 0; place-items: center; border-radius: var(--radius-sm); background: var(--accent-soft); color: var(--accent); font-size: 1.25rem; }
.system-node h3 { margin-bottom: 0.65rem; font-size: 1rem; }
.system-node p { margin: 0; color: var(--text-soft); font-size: 0.78rem; }
.system-flow__arrow { display: grid; height: 1.3rem; place-items: center; color: var(--text-muted); transform: rotate(90deg); }

.comparison { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg-elevated); box-shadow: var(--shadow-sm); }
table { width: 100%; border-collapse: collapse; }
.comparison table { min-width: 48rem; }
th, td { padding: 1rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
thead th { background: var(--bg-subtle); color: var(--text-muted); font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; }
tbody th { width: 10rem; color: var(--text-muted); font-size: 0.74rem; font-weight: 500; }
tbody td { color: var(--text-soft); font-size: 0.82rem; }
tr:last-child th, tr:last-child td { border-bottom: 0; }
.comparison__highlight { background: color-mix(in srgb, var(--accent-soft) 58%, transparent); }
.chip { display: inline-flex; padding: 0.25rem 0.55rem; border-radius: var(--radius-pill); font-size: 0.68rem; font-weight: 600; }
.chip--good { background: var(--accent-soft); color: var(--accent); }
.chip--warn { background: var(--orange-soft); color: var(--orange); }

.section--dark { background: #0a0a0a; color: #f5f5f1; }
.section--dark .section-heading > p { color: #afafa6; }
.section--dark .overline { color: #85857d; }
.fee-layout { overflow: hidden; border: 1px solid #292a25; border-radius: var(--radius-lg); background: #111210; }
.fee-layout::after { color: rgba(255,255,255,0.025); }
.fee-tabs { display: flex; overflow-x: auto; gap: 0.25rem; padding: 0.5rem; border-bottom: 1px solid #292a25; }
.fee-tabs button { min-width: max-content; cursor: pointer; border: 0; border-radius: var(--radius-sm); background: transparent; color: #929289; font-size: 0.78rem; font-weight: 600; line-height: 2.5rem; padding-inline: 0.9rem; }
.fee-tabs button[aria-selected="true"] { background: #20221e; color: #f5f5f1; }
.fee-panel { padding: var(--space-2); }
.calculator { display: grid; gap: var(--space-3); }
.calculator__fields { display: grid; gap: 0.75rem; }
.calculator label { display: grid; gap: 0.4rem; color: #aaa9a0; font-size: 0.7rem; }
.calculator input, .calculator select { width: 100%; min-height: 2.8rem; padding: 0.6rem 0.75rem; border: 1px solid #34352f; border-radius: var(--radius-sm); outline: none; background: #181916; color: #f5f5f1; }
.calculator input:focus, .calculator select:focus { border-color: #7bc9a8; box-shadow: 0 0 0 3px rgba(123, 201, 168, 0.16); }
.switch-field { align-content: center; grid-template-columns: 1fr auto; }
.switch-field input { width: 2.8rem; accent-color: #7bc9a8; }
.calculator__result { display: grid; align-content: center; padding: var(--space-3); border: 1px solid #34352f; border-radius: var(--radius-md); background: #171916; }
.calculator__result span { color: #aaa9a0; font-size: 0.74rem; }
.calculator__result strong { margin: 0.45rem 0; color: #7bc9a8; font-size: clamp(2.3rem, 10vw, 4.4rem); letter-spacing: -0.06em; line-height: 1; }
.calculator__result small { color: #7f7f77; font-size: 0.65rem; line-height: 1.5; }
.fee-breakdown { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: var(--space-2); }
.fee-breakdown span { padding: 0.4rem 0.65rem; border: 1px solid #292a25; border-radius: var(--radius-pill); color: #aaa9a0; font-size: 0.66rem; }
.fee-table { overflow-x: auto; margin-top: var(--space-3); border: 1px solid #292a25; border-radius: var(--radius-sm); }
.fee-table table { min-width: 42rem; }
.fee-table th, .fee-table td { border-color: #292a25; }
.fee-table thead th { background: #181916; color: #929289; }
.fee-table tbody td { color: #b8b8ae; }
.fee-table strong { color: #7bc9a8; }
.section--dark .callout { border-color: #292a25; background: #141512; }
.section--dark .callout p { color: #aaa9a0; }
.crypto-fee-grid { display: grid; gap: 0.75rem; }
.crypto-fee-grid article { padding: var(--space-3); border: 1px solid #292a25; border-radius: var(--radius-md); background: #151613; }
.crypto-fee-grid span { color: #929289; font-size: 0.72rem; }
.crypto-fee-grid strong { display: block; margin: 0.4rem 0; color: #7bc9a8; font-size: 2.2rem; letter-spacing: -0.05em; }
.crypto-fee-grid p { margin: 0; color: #aaa9a0; font-size: 0.78rem; }

.how-layout { display: grid; gap: var(--space-5); }
.how-layout__intro { margin-bottom: 0; }
.text-link { display: inline-flex; align-items: center; gap: 0.45rem; color: var(--accent); font-size: 0.82rem; font-weight: 600; }
.text-link:hover { text-decoration: underline; text-underline-offset: 0.25rem; }
.steps { display: grid; gap: 0.75rem; margin: 0; padding: 0; list-style: none; }
.step-card { display: grid; grid-template-columns: auto 1fr; gap: 1rem; padding: var(--space-3); border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg-elevated); }
.step-card__number { color: var(--text-muted); font-family: var(--font-mono); font-size: 0.7rem; }
.step-card h3 { margin: 0 0 0.55rem; font-size: 1.05rem; }
.step-card p { margin-bottom: 0.85rem; color: var(--text-soft); font-size: 0.82rem; }
.step-card__warning { display: flex; align-items: flex-start; gap: 0.45rem; color: var(--orange); font-size: 0.7rem; }
.step-card__warning i { margin-top: 0.15rem; }

.greeks-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
.greek-card { min-height: 13rem; padding: var(--space-2); border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg-elevated); }
.greek-card > div { display: flex; align-items: flex-end; justify-content: space-between; }
.greek-card > div span { font-family: Georgia, serif; font-size: 2.2rem; line-height: 1; }
.greek-card > div small { color: var(--text-muted); font-size: 0.62rem; letter-spacing: 0.08em; text-transform: uppercase; }
.greek-card h3 { margin: var(--space-4) 0 0.6rem; font-size: 0.9rem; }
.greek-card p { margin: 0; color: var(--text-soft); font-size: 0.7rem; }
.greek-card--delta > div span { color: var(--blue); }
.greek-card--gamma > div span { color: var(--violet); }
.greek-card--theta > div span { color: var(--orange); }
.greek-card--vega > div span { color: var(--accent); }

.accordion { margin-top: var(--space-4); border-top: 1px solid var(--line); }
.accordion__item { border-bottom: 1px solid var(--line); }
.accordion__item h3 { margin: 0; }
.accordion__item button { display: flex; width: 100%; align-items: center; justify-content: space-between; gap: var(--space-2); padding: var(--space-2) 0; cursor: pointer; border: 0; background: transparent; text-align: left; }
.accordion__item button span { font-size: 0.9rem; font-weight: 600; }
.accordion__item button i { flex: 0 0 auto; color: var(--text-muted); transition: transform var(--duration-base) var(--ease-out); }
.accordion__item button[aria-expanded="true"] i { transform: rotate(45deg); }
.accordion__panel { padding: 0 0 var(--space-3); color: var(--text-soft); font-size: 0.83rem; }
.accordion__panel > :last-child { margin-bottom: 0; }
.concept-grid { display: grid; gap: 0.75rem; }
.concept-grid div { padding: var(--space-2); border-radius: var(--radius-sm); background: var(--bg-elevated); }
.concept-grid strong { display: block; margin-bottom: 0.45rem; color: var(--accent); }
.concept-grid p { margin: 0; }

.pros-cons { display: grid; gap: 0.75rem; }
.pros-cons__card { padding: var(--space-3); border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg-elevated); }
.pros-cons__heading { display: flex; align-items: center; gap: 0.65rem; padding-bottom: var(--space-2); border-bottom: 1px solid var(--line); }
.pros-cons__heading h3 { margin: 0; font-size: 1rem; }
.pros-cons__heading i { font-size: 1.2rem; }
.pros-cons__card--pros .pros-cons__heading i { color: var(--positive); }
.pros-cons__card--cons .pros-cons__heading i { color: var(--orange); }
.pros-cons ul { display: grid; gap: 0.75rem; margin: var(--space-2) 0 0; padding-left: 1.25rem; }
.pros-cons li { padding-left: 0.25rem; color: var(--text-soft); font-size: 0.8rem; }
.kzg-note { display: grid; gap: var(--space-2); margin-top: var(--space-5); padding: var(--space-3); overflow: hidden; border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line)); border-radius: var(--radius-md); background: var(--accent-soft); }
.kzg-note__avatar { display: grid; width: 3rem; height: 3rem; place-items: center; border-radius: 50%; background: var(--accent); color: var(--accent-contrast); font-size: 0.7rem; font-weight: 700; }
.kzg-note blockquote { margin: 0.5rem 0 0; font-size: clamp(1.05rem, 3vw, 1.45rem); font-weight: 500; line-height: 1.6; letter-spacing: -0.025em; }

.section--faq { border-top: 1px solid var(--line); background: var(--bg-elevated); }
.faq-layout { display: grid; gap: var(--space-4); }
.faq-layout__intro { margin-bottom: 0; }
.accordion--faq { margin-top: 0; }

.final-cta { padding: var(--space-8) 0; background: var(--text); color: var(--bg); }
.final-cta__inner { display: grid; gap: var(--space-4); overflow: hidden; align-items: end; }
.final-cta h2 { max-width: 52rem; font-size: clamp(2rem, 6vw, 3.6rem); }
.final-cta p { max-width: 40rem; margin: 0; color: color-mix(in srgb, var(--bg) 66%, transparent); }
.final-cta .overline { color: color-mix(in srgb, var(--bg) 50%, transparent); }
.final-cta .watermark::after, .final-cta__inner::after { color: color-mix(in srgb, var(--bg) 3%, transparent); }
.final-cta .button--primary { background: var(--bg); color: var(--text); }
.final-cta .button--primary:hover { background: color-mix(in srgb, var(--bg) 90%, var(--text)); }

.site-footer { padding: var(--space-6) 0; border-top: 1px solid var(--line); background: var(--bg-elevated); }
.site-footer__grid { display: grid; gap: var(--space-4); }
.brand--footer { margin-bottom: var(--space-2); }
.site-footer p { max-width: 32rem; margin: 0; color: var(--text-muted); font-size: 0.68rem; }
.site-footer__grid > div:not(:first-child) { display: grid; align-content: start; gap: 0.4rem; }
.site-footer strong { margin-bottom: 0.35rem; font-size: 0.72rem; }
.site-footer a, .site-footer span { color: var(--text-muted); font-size: 0.68rem; }
.site-footer a:hover { color: var(--text); }

.smart-modal { position: fixed; z-index: 500; inset: 0; display: grid; place-items: end center; }
.smart-modal[hidden] { display: none; }
.smart-modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.64); backdrop-filter: blur(6px); }
.smart-modal__dialog { position: relative; width: min(100%, 32rem); padding: var(--space-4) var(--space-3) var(--space-3); border: 1px solid var(--line); border-radius: var(--radius-lg) var(--radius-lg) 0 0; background: var(--bg-elevated); box-shadow: var(--shadow-md); animation: modal-in var(--duration-slow) var(--ease-out); }
@keyframes modal-in { from { opacity: 0; transform: translateY(2rem); } }
.smart-modal__close { position: absolute; top: 0.75rem; right: 0.75rem; }
.smart-modal__icon { display: grid; width: 3rem; height: 3rem; margin-bottom: var(--space-3); place-items: center; border-radius: var(--radius-sm); background: #dff4e6; color: #169b54; font-size: 1.5rem; }
.smart-modal h2 { margin: 0.6rem 0 0.85rem; font-size: 1.75rem; }
.smart-modal p { color: var(--text-soft); font-size: 0.85rem; }
.smart-modal__fineprint { margin: var(--space-2) 0 0 !important; color: var(--text-muted) !important; font-size: 0.66rem !important; text-align: center; }
.wechat-steps { display: grid; gap: 0.75rem; margin: var(--space-3) 0; padding: 0; list-style: none; }
.wechat-steps li { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); }
.wechat-steps li > span { display: grid; width: 1.75rem; height: 1.75rem; flex: 0 0 auto; place-items: center; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-size: 0.7rem; font-weight: 700; }
.wechat-steps p { margin: 0; }

.toast { position: fixed; z-index: 600; right: 1rem; bottom: 1rem; max-width: min(24rem, calc(100% - 2rem)); padding: 0.75rem 1rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--text); color: var(--bg); box-shadow: var(--shadow-md); font-size: 0.75rem; }
.toast[hidden] { display: none; }

@media (min-width: 40rem) {
  .shell { width: min(100% - 3rem, 76rem); }
  .market-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .system-flow { grid-template-columns: 1fr auto 1fr; align-items: stretch; }
  .system-flow__arrow { height: auto; transform: none; }
  .system-flow__arrow:nth-of-type(2) { display: none; }
  .system-node:nth-of-type(3) { grid-column: 1; }
  .system-node:nth-of-type(4) { grid-column: 3; }
  .calculator__fields { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .calculator { grid-template-columns: minmax(0, 1.45fr) minmax(15rem, 0.75fr); align-items: stretch; }
  .fee-panel { padding: var(--space-3); }
  .crypto-fee-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .concept-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pros-cons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kzg-note { grid-template-columns: auto 1fr; padding: var(--space-4); }
  .final-cta__inner { grid-template-columns: 1fr auto; }
  .site-footer__grid { grid-template-columns: 1.6fr 1fr 1fr; }
  .smart-modal { place-items: center; }
  .smart-modal__dialog { border-radius: var(--radius-lg); }
}

@media (min-width: 64rem) {
  .site-header__menu { display: none; }
  .site-nav { position: static; display: flex; padding: 0; border: 0; background: transparent; box-shadow: none; }
  .site-nav a { padding: 0.45rem 0.7rem; }
  .hero { min-height: calc(100svh - 4.75rem); display: grid; align-items: center; padding: var(--space-8) 0; }
  .hero__grid { grid-template-columns: minmax(0, 1fr) minmax(28rem, 0.82fr); gap: var(--space-8); }
  .hero-visual { padding: var(--space-4); }
  .payoff-chart canvas { height: 18rem; }
  .section { padding: var(--space-16) 0; }
  .section-heading--split { grid-template-columns: 1.25fr 0.75fr; }
  .timeline { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .system-flow { grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; }
  .system-flow__arrow:nth-of-type(2) { display: grid; }
  .system-node:nth-of-type(3), .system-node:nth-of-type(4) { grid-column: auto; }
  .how-layout { grid-template-columns: 0.78fr 1.22fr; gap: var(--space-8); align-items: start; }
  .how-layout__intro { position: sticky; top: 7rem; }
  .greeks-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .greek-card { min-height: 17rem; padding: var(--space-3); }
  .greek-card h3 { margin-top: var(--space-8); }
  .faq-layout { grid-template-columns: 0.72fr 1.28fr; gap: var(--space-8); }
  .faq-layout__intro { position: sticky; top: 7rem; align-self: start; }
}

@media (max-width: 24rem) {
  .hero__facts { grid-template-columns: 1fr; }
  .hero__facts div { padding: 0.6rem 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .hero__facts div:last-child { border-bottom: 0; }
  .chart-metrics { grid-template-columns: 1fr; }
  .market-grid { grid-template-columns: 1fr; }
}