:root,
[data-theme='light'] {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 6.6vw, 7rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --font-display: 'Cabinet Grotesk', 'Satoshi', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', monospace;

  --color-bg: #f4f5ef;
  --color-surface: #fbfbf7;
  --color-surface-2: #f0f2ea;
  --color-surface-offset: #e7ebe1;
  --color-surface-dynamic: #dce4da;
  --color-border: #d3dacd;
  --color-divider: #e0e5dc;
  --color-text: #172521;
  --color-text-muted: #5f6c66;
  --color-text-faint: #8a958e;
  --color-text-inverse: #f7f5ec;
  --color-primary: #0c716d;
  --color-primary-hover: #07544f;
  --color-primary-active: #063d3b;
  --color-primary-highlight: #cfe3df;
  --color-forest: #12231f;
  --color-forest-2: #18312b;
  --color-gold: #b98a26;
  --color-rust: #a85735;
  --color-blue: #557aa0;
  --color-success: #437a22;
  --color-warning: #964219;
  --color-error: #a13544;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px color-mix(in oklab, var(--color-text) 8%, transparent);
  --shadow-md: 0 6px 18px color-mix(in oklab, var(--color-text) 10%, transparent);
  --shadow-lg: 0 18px 48px color-mix(in oklab, var(--color-text) 14%, transparent);
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

[data-theme='dark'] {
  --color-bg: #0c1412;
  --color-surface: #121d1a;
  --color-surface-2: #172521;
  --color-surface-offset: #1c2d28;
  --color-surface-dynamic: #263a34;
  --color-border: #2b403a;
  --color-divider: #223630;
  --color-text: #e6e2d7;
  --color-text-muted: #a7ada4;
  --color-text-faint: #727f77;
  --color-text-inverse: #0c1412;
  --color-primary: #5cc8c3;
  --color-primary-hover: #8bdad6;
  --color-primary-active: #b7e9e6;
  --color-primary-highlight: #1e4642;
  --color-forest: #08100e;
  --color-forest-2: #0e1a17;
  --color-gold: #d4a64a;
  --color-rust: #d18462;
  --color-blue: #7ea0c0;
  --color-success: #6daa45;
  --color-warning: #bb653b;
  --color-error: #dd6974;
  --shadow-sm: 0 1px 2px color-mix(in oklab, #000 30%, transparent);
  --shadow-md: 0 8px 20px color-mix(in oklab, #000 34%, transparent);
  --shadow-lg: 0 24px 60px color-mix(in oklab, #000 44%, transparent);
}

body {
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, color-mix(in oklab, var(--color-primary-highlight) 50%, transparent), transparent 32rem),
    linear-gradient(180deg, var(--color-bg), var(--color-bg));
}

a {
  color: inherit;
  text-decoration: none;
}

.skip-link {
  position: fixed;
  inset: var(--space-4) auto auto var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.section {
  padding: clamp(var(--space-16), 9vw, var(--space-32)) clamp(var(--space-4), 5vw, var(--space-12));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-wide);
  min-height: 72px;
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-8));
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 34px;
  height: 34px;
  color: var(--color-primary);
  flex: 0 0 auto;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1);
  border: 1px solid color-mix(in oklab, var(--color-text) 8%, transparent);
  border-radius: var(--radius-full);
  background: color-mix(in oklab, var(--color-surface) 70%, transparent);
}

.desktop-nav a,
.footer-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 600;
}

.desktop-nav a:hover,
.footer-links a:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.button,
.icon-button,
.menu-toggle {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
}

.button {
  padding: var(--space-2) var(--space-5);
  border: 1px solid transparent;
  white-space: nowrap;
}

.button-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.button-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

[data-theme='dark'] .button-primary {
  color: #08100e;
}

.button-secondary {
  border-color: color-mix(in oklab, var(--color-text) 12%, transparent);
  background: color-mix(in oklab, var(--color-surface) 74%, transparent);
  color: var(--color-text);
}

.button-secondary:hover,
.icon-button:hover {
  background: var(--color-surface-offset);
  transform: translateY(-1px);
}

.icon-button {
  width: 44px;
  border: 1px solid color-mix(in oklab, var(--color-text) 12%, transparent);
  background: color-mix(in oklab, var(--color-surface) 74%, transparent);
}

.icon-button svg {
  width: 20px;
  height: 20px;
}

.menu-toggle {
  display: none;
  width: 44px;
  flex-direction: column;
  gap: 5px;
  border: 1px solid color-mix(in oklab, var(--color-text) 12%, transparent);
  background: color-mix(in oklab, var(--color-surface) 74%, transparent);
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  border-radius: var(--radius-full);
  background: currentColor;
}

.mobile-nav {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4) var(--space-4);
  border-top: 1px solid color-mix(in oklab, var(--color-text) 8%, transparent);
  background: var(--color-surface);
}

.mobile-nav a {
  min-height: 48px;
  display: flex;
  align-items: center;
  padding-inline: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-weight: 700;
}

.mobile-nav a:hover,
.mobile-nav a:active {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.78fr);
  align-items: center;
  gap: clamp(var(--space-10), 7vw, var(--space-24));
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-top: clamp(var(--space-16), 9vw, var(--space-24));
}

.hero-copy {
  display: grid;
  gap: var(--space-6);
}

.eyebrow {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 10.8ch;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 800;
  letter-spacing: -0.052em;
}

.hero-lede,
.section-heading p,
.calculator-copy p,
.final-cta p,
.section-kicker p:not(.eyebrow) {
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.hero-proof span,
.card-index {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: var(--space-1) var(--space-3);
  border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: color-mix(in oklab, var(--color-surface) 74%, transparent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.hero-visual {
  position: relative;
  display: grid;
  gap: var(--space-4);
}

.terminal-card {
  overflow: hidden;
  border: 1px solid color-mix(in oklab, var(--color-primary) 28%, var(--color-border));
  border-radius: var(--radius-2xl);
  background: var(--color-forest);
  color: #f5f2e8;
  box-shadow: var(--shadow-lg);
}

.terminal-top {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  color: rgba(245, 242, 232, 0.66);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.terminal-top span {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: rgba(245, 242, 232, 0.32);
}

.terminal-top strong {
  margin-left: var(--space-2);
  font-weight: 500;
}

.terminal-body {
  display: grid;
  gap: var(--space-5);
  padding: clamp(var(--space-5), 4vw, var(--space-8));
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.muted {
  color: rgba(245, 242, 232, 0.62);
}

.route-line {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto 1fr auto;
  align-items: center;
  gap: var(--space-2);
}

.node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-full);
  color: rgba(245, 242, 232, 0.78);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.node.active {
  border-color: var(--color-primary);
  background: color-mix(in oklab, var(--color-primary) 22%, transparent);
  color: #ffffff;
}

.rail {
  height: 1px;
  background: linear-gradient(90deg, var(--color-primary), rgba(255, 255, 255, 0.18));
}

.code-block {
  padding: var(--space-4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.045);
  color: rgba(245, 242, 232, 0.8);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.code-block strong {
  color: var(--color-primary);
  font-weight: 700;
}

.model-stack {
  display: grid;
  gap: var(--space-2);
}

.model-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  color: rgba(245, 242, 232, 0.72);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.model-row.selected {
  border-color: color-mix(in oklab, var(--color-primary) 80%, white);
  background: color-mix(in oklab, var(--color-primary) 18%, transparent);
  color: #ffffff;
}

.model-row.blocked {
  color: rgba(245, 242, 232, 0.46);
}

.savings-ticket {
  position: static;
  justify-self: end;
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  column-gap: var(--space-6);
  padding: var(--space-5);
  border: 1px solid color-mix(in oklab, var(--color-text) 12%, transparent);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.savings-ticket strong {
  display: block;
  margin-block: var(--space-1);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  letter-spacing: -0.03em;
}

.savings-ticket span {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.signal-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  max-width: var(--content-wide);
  margin: 0 auto clamp(var(--space-8), 5vw, var(--space-16));
  padding: var(--space-5) clamp(var(--space-4), 4vw, var(--space-8));
  border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
}

.signal-strip p:not(.eyebrow) {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.signal-strip a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 800;
  white-space: nowrap;
}

.signal-strip a:hover {
  color: var(--color-primary-hover);
}

.split-section,
.platform-section,
.architecture-section,
.calculator-section,
.buyers-section,
.pricing-section,
.plan-section,
.faq-section {
  max-width: var(--content-wide);
  margin-inline: auto;
}

.split-section,
.calculator-section,
.plan-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.38fr) minmax(0, 1fr);
  gap: clamp(var(--space-8), 6vw, var(--space-20));
}

.section-kicker,
.calculator-copy {
  display: grid;
  align-content: start;
  gap: var(--space-4);
}

.section-kicker h2,
.section-heading h2,
.calculator-copy h2,
.final-cta h2 {
  max-width: 13ch;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.042em;
}

.section-heading {
  display: grid;
  justify-items: center;
  gap: var(--space-4);
  margin-bottom: clamp(var(--space-8), 6vw, var(--space-16));
  text-align: center;
}

.section-heading.compact {
  justify-items: start;
  text-align: left;
}

.section-heading.compact h2,
.section-heading.compact p {
  max-width: 760px;
}

.problem-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-4);
}

.problem-card,
.control-card,
.price-card,
.timeline article,
.faq-grid details {
  border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
  border-radius: var(--radius-xl);
  background: color-mix(in oklab, var(--color-surface) 86%, transparent);
  box-shadow: var(--shadow-sm);
}

.problem-card {
  display: grid;
  align-content: start;
  gap: var(--space-4);
  padding: clamp(var(--space-5), 3vw, var(--space-8));
}

.problem-card.tall {
  grid-row: span 2;
  min-height: 380px;
  background:
    linear-gradient(160deg, color-mix(in oklab, var(--color-primary-highlight) 35%, transparent), transparent 60%),
    var(--color-surface);
}

.problem-card.wide {
  grid-column: 1 / -1;
}

.problem-card h3,
.control-card h3,
.tab-panel h3,
.timeline h3,
.faq-grid summary {
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.16;
}

.problem-card p,
.control-card p,
.price-card p,
.timeline p,
.faq-grid p,
.tab-panel p,
.tab-panel li {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.control-map {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 0.85fr;
  gap: var(--space-4);
}

.control-card {
  display: grid;
  gap: var(--space-5);
  padding: clamp(var(--space-5), 3vw, var(--space-8));
}

.control-card.featured {
  grid-row: span 2;
  min-height: 420px;
  background:
    linear-gradient(180deg, color-mix(in oklab, var(--color-forest) 96%, transparent), color-mix(in oklab, var(--color-forest-2) 96%, transparent)),
    var(--color-forest);
  color: #f5f2e8;
}

.control-card.featured p {
  color: rgba(245, 242, 232, 0.72);
}

.control-card.featured .eyebrow {
  color: var(--color-primary);
}

.architecture-flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--space-2);
}

.flow-step {
  position: relative;
  min-height: 150px;
  display: grid;
  align-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.flow-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  right: calc(var(--space-2) * -1);
  width: var(--space-2);
  height: 1px;
  background: var(--color-primary);
}

.flow-step span {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
}

.flow-step strong {
  font-size: var(--text-sm);
  line-height: 1.25;
}

.calculator-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.72fr);
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
  border-radius: var(--radius-2xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
}

.calc-controls,
.calc-results {
  display: grid;
  gap: var(--space-5);
  padding: clamp(var(--space-5), 3vw, var(--space-8));
  border-radius: var(--radius-xl);
  background: var(--color-surface-2);
}

.calc-controls label {
  color: var(--color-text);
  font-weight: 800;
}

.range-row {
  display: grid;
  grid-template-columns: 1fr minmax(96px, auto);
  align-items: center;
  gap: var(--space-4);
}

input[type='range'] {
  width: 100%;
  min-height: 44px;
  accent-color: var(--color-primary);
}

output {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-align: right;
}

.metric {
  display: grid;
  gap: var(--space-2);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
}

.metric span {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.metric strong {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1;
  letter-spacing: -0.03em;
}

.metric.highlighted strong {
  color: var(--color-primary);
}

.mini-chart {
  display: grid;
  gap: var(--space-3);
}

.mini-chart span {
  position: relative;
  min-height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  overflow: hidden;
  padding-inline: var(--space-3);
  border-radius: var(--radius-full);
  background: color-mix(in oklab, var(--color-text) 7%, transparent);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
}

.mini-chart span::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--bar);
  background: color-mix(in oklab, var(--color-primary) 45%, transparent);
  transition: width 420ms var(--ease-out);
}

.mini-chart span {
  isolation: isolate;
}

.mini-chart span::after {
  content: attr(data-label);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tab-list button {
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 800;
}

.tab-list button[aria-selected='true'] {
  background: var(--color-forest);
  color: #f5f2e8;
  border-color: var(--color-forest);
}

.tab-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.48fr);
  gap: var(--space-8);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
  border-radius: var(--radius-2xl);
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--color-primary-highlight) 38%, transparent), transparent 62%),
    var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.tab-panel ul {
  display: grid;
  gap: var(--space-3);
}

.tab-panel li {
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, var(--color-text) 5%, transparent);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.price-card {
  display: grid;
  align-content: start;
  gap: var(--space-4);
  padding: clamp(var(--space-5), 3vw, var(--space-8));
}

.price-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  letter-spacing: -0.04em;
}

.featured-price {
  background: var(--color-forest);
  color: #f5f2e8;
}

.featured-price p {
  color: rgba(245, 242, 232, 0.72);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.timeline article {
  min-height: 240px;
  display: grid;
  align-content: space-between;
  gap: var(--space-5);
  padding: var(--space-5);
}

.timeline span {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.faq-grid details {
  padding: var(--space-5);
}

.faq-grid summary {
  cursor: pointer;
  list-style: none;
}

.faq-grid summary::-webkit-details-marker {
  display: none;
}

.faq-grid summary::after {
  content: '+';
  float: right;
  color: var(--color-primary);
  font-family: var(--font-mono);
}

.faq-grid details[open] summary::after {
  content: '–';
}

.faq-grid p {
  margin-top: var(--space-4);
}

.final-cta {
  max-width: var(--content-wide);
  margin: clamp(var(--space-8), 6vw, var(--space-16)) auto;
  padding: clamp(var(--space-8), 8vw, var(--space-20));
  border-radius: var(--radius-2xl);
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--color-primary) 24%, transparent), transparent 60%),
    var(--color-forest);
  color: #f5f2e8;
}

.final-cta h2 {
  max-width: 15ch;
}

.final-cta p {
  margin-block: var(--space-5) var(--space-8);
  color: rgba(245, 242, 232, 0.72);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-8) clamp(var(--space-4), 5vw, var(--space-12)) var(--space-12);
  border-top: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
}

.site-footer p {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  justify-content: flex-end;
}

@supports (animation-timeline: view()) {
  .problem-card,
  .control-card,
  .price-card,
  .timeline article,
  .faq-grid details,
  .flow-step {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 70%;
  }
}

@keyframes reveal-fade {
  to {
    opacity: 1;
  }
}

@media (max-width: 1120px) {
  .desktop-nav,
  .header-prototype {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .hero,
  .split-section,
  .calculator-section,
  .plan-section {
    grid-template-columns: 1fr;
  }

  .hero h1,
  .section-kicker h2,
  .calculator-copy h2 {
    max-width: 14ch;
  }

  .control-map,
  .pricing-grid,
  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .architecture-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .flow-step:nth-child(3)::after {
    display: none;
  }
}

@media (max-width: 760px) {
  .section {
    padding-inline: var(--space-4);
  }

  .header-inner {
    min-height: 64px;
  }

  .header-cta {
    display: none;
  }

  .hero {
    padding-top: var(--space-10);
  }

  .hero h1 {
    max-width: 9.8ch;
    font-size: clamp(3rem, 17vw, 4.7rem);
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .button {
    justify-content: center;
  }

  .route-line {
    grid-template-columns: 1fr;
  }

  .rail {
    width: 1px;
    height: var(--space-4);
    margin-inline: auto;
  }

  .savings-ticket {
    position: static;
    width: 100%;
    margin-top: var(--space-4);
  }

  .signal-strip {
    flex-direction: column;
    align-items: flex-start;
    margin-inline: var(--space-4);
  }

  .problem-grid,
  .control-map,
  .architecture-flow,
  .calculator-panel,
  .tab-panel,
  .pricing-grid,
  .timeline,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .problem-card.tall {
    min-height: auto;
  }

  .control-card.featured {
    min-height: auto;
  }

  .flow-step {
    min-height: 120px;
  }

  .flow-step:not(:last-child)::after {
    top: auto;
    right: 50%;
    bottom: calc(var(--space-2) * -1);
    width: 1px;
    height: var(--space-2);
  }

  .range-row {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  output {
    text-align: left;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    justify-content: flex-start;
  }
}