:root {
  --ink: #0a0a0a;
  --paper: #ecebe5;
  --white: #f7f7f2;
  --accent: #d8ff47;
  --muted: #a7a79f;
  --text-light: #c8c8c1;
  --text-dim-dark: #85857e;
  --text-dim-light: #62625c;
  --line-light: rgba(247, 247, 242, .22);
  --line-dark: rgba(10, 10, 10, .28);
  --font-head: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "DM Mono", monospace;
  --gutter: 2.2vw;
  --header-h: 76px;
  --t-body: clamp(16px, 1.08vw, 19px);
  --t-sm: clamp(12px, .78vw, 14px);
  --t-xs: clamp(10px, .64vw, 12px);
  --t-display: clamp(52px, 9vw, 160px);
  --t-section: clamp(40px, 5.4vw, 88px);
  --fast: .18s ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 500; margin: 0; letter-spacing: -.02em; line-height: 1; }
p { margin: 0; }

.mono {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.accent { color: var(--accent); }

/* Header */
.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-h);
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line-light);
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: var(--t-sm); letter-spacing: .1em; text-transform: uppercase; }
.brand-mark { width: 24px; height: 24px; display: block; }
.nav { display: flex; gap: clamp(18px, 2vw, 36px); }
.nav a { font-family: var(--font-mono); font-size: var(--t-xs); letter-spacing: .08em; text-transform: uppercase; color: var(--text-light); transition: color var(--fast); }
.nav a:hover { color: var(--accent); }
.header-actions { justify-self: end; display: flex; align-items: center; gap: clamp(13px, 1.3vw, 25px); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border: 1px solid var(--line-light);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .08em;
  text-transform: uppercase;
  transition: background var(--fast), color var(--fast), border-color var(--fast);
}
.btn:hover { border-color: var(--white); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.btn-primary:hover { background: var(--white); border-color: var(--white); }
.btn-arrow::after { content: "→"; }
.on-paper .btn { border-color: var(--line-dark); }
.on-paper .btn:hover { border-color: var(--ink); }

/* Sections */
.section { padding: clamp(70px, 9vw, 160px) var(--gutter); position: relative; }
.on-paper { background: var(--paper); color: var(--ink); }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: clamp(35px, 4vw, 70px); }
.section-title { font-size: var(--t-section); text-transform: uppercase; max-width: 14ch; }
.section-lead { max-width: 46ch; color: var(--text-light); }
.on-paper .section-lead { color: var(--text-dim-light); }
.eyebrow { display: block; margin-bottom: 18px; color: var(--text-dim-dark); }
.on-paper .eyebrow { color: var(--text-dim-light); }

/* Hero */
.hero {
  min-height: 100vh;
  padding: calc(var(--header-h) + 24px) var(--gutter) 45px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-image:
    linear-gradient(var(--line-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-light) 1px, transparent 1px);
  background-size: 120px 120px;
  background-position: -1px -1px;
  border-bottom: 1px solid var(--line-light);
}
.hero-meta { display: flex; justify-content: space-between; color: var(--text-dim-dark); }
.hero-title { font-size: var(--t-display); text-transform: uppercase; line-height: .9; max-width: 12ch; }
.hero-bottom { display: grid; grid-template-columns: 1fr 1fr; gap: 45px; align-items: end; }
.hero-paragraph { max-width: 48ch; color: var(--text-light); }
.hero-cta { display: flex; gap: 12px; justify-content: flex-end; flex-wrap: wrap; }
.status { display: inline-flex; align-items: center; gap: 8px; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }

/* Scenarios (tabs) */
.tabs { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line-dark); border-bottom: 0; }
.tab {
  padding: 16px 18px;
  background: none;
  border: 0;
  border-right: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .08em;
  text-transform: uppercase;
  text-align: left;
  color: var(--text-dim-light);
  cursor: pointer;
}
.tab:last-child { border-right: 0; }
.tab[aria-selected="true"] { background: var(--ink); color: var(--accent); }
.panel { display: none; grid-template-columns: 1fr 1.4fr; border: 1px solid var(--line-dark); }
.panel.is-active { display: grid; }
.panel-copy { padding: clamp(24px, 3vw, 45px); display: flex; flex-direction: column; gap: 18px; }
.panel-copy h3 { font-size: clamp(26px, 2.4vw, 40px); }
.panel-copy strong { text-decoration: underline; text-underline-offset: 3px; }
.panel-flow { background: var(--ink); color: var(--white); padding: clamp(24px, 3vw, 45px); display: grid; grid-template-rows: auto 1fr; gap: 24px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.step { border: 1px solid var(--line-light); padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.step .mono { color: var(--text-dim-dark); }
.step:last-child { border-color: var(--accent); }
.step:last-child .mono { color: var(--accent); }
.step b { font-family: var(--font-head); font-weight: 500; font-size: clamp(16px, 1.2vw, 20px); }
.log { border: 1px solid var(--line-light); padding: 18px; font-family: var(--font-mono); font-size: var(--t-sm); color: var(--text-light); display: flex; flex-direction: column; gap: 8px; align-self: end; }
.log span { color: var(--accent); }

/* Capabilities grid */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.cell { padding: clamp(24px, 2.6vw, 45px); border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); display: flex; flex-direction: column; gap: 18px; min-height: 280px; transition: background var(--fast); }
.cell:hover { background: rgba(216, 255, 71, .05); }
.cell .mono { color: var(--accent); }
.cell h4 { font-size: clamp(22px, 1.8vw, 30px); margin-top: auto; }
.cell p { color: var(--text-light); font-size: var(--t-sm); line-height: 1.6; }

/* Hub */
.hub { display: grid; grid-template-columns: 1fr auto 1fr; gap: clamp(24px, 3vw, 70px); align-items: center; }
.hub-col { border: 1px solid var(--line-dark); padding: 24px; }
.hub-col h3 { font-size: clamp(22px, 1.8vw, 30px); margin-bottom: 6px; }
.hub-col .mono { color: var(--text-dim-light); }
.hub-list { margin-top: 18px; display: grid; gap: 1px; background: var(--line-dark); border: 1px solid var(--line-dark); }
.hub-list li { background: var(--paper); padding: 10px 12px; display: flex; justify-content: space-between; gap: 12px; font-size: var(--t-sm); }
.hub-list li small { font-family: var(--font-mono); font-size: var(--t-xs); color: var(--text-dim-light); text-transform: uppercase; }
.hub-core {
  width: clamp(220px, 20vw, 320px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--ink);
  color: var(--white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 10px;
  padding: 24px;
  box-shadow: 0 0 0 12px rgba(10, 10, 10, .08), 0 0 0 24px rgba(10, 10, 10, .04);
}
.hub-core h3 { font-size: clamp(22px, 1.8vw, 30px); }
.hub-core .mono { color: var(--accent); }

/* Marquee */
.marquee { overflow: hidden; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); padding: 18px 0; }
.marquee-track { display: flex; gap: 45px; width: max-content; animation: scroll 40s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span { font-family: var(--font-head); font-size: clamp(22px, 2vw, 34px); color: var(--text-light); white-space: nowrap; }
.marquee-track span::after { content: "/"; margin-left: 45px; color: var(--accent); }
@keyframes scroll { to { transform: translateX(-50%); } }

/* Pricing */
.pricing { display: grid; grid-template-columns: 1fr 1fr; gap: 45px; align-items: start; }
.price-card { border: 1px solid var(--line-dark); }
.price-card > * { padding: clamp(24px, 2.6vw, 35px); }
.price-top { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px solid var(--line-dark); }
.price { font-family: var(--font-head); font-size: clamp(64px, 7vw, 120px); line-height: 1; letter-spacing: -.04em; }
.price sup { font-size: .35em; vertical-align: top; }
.price small { font-family: var(--font-mono); font-size: var(--t-xs); letter-spacing: .08em; text-transform: uppercase; color: var(--text-dim-light); }
.price-features li { padding: 12px 0; border-bottom: 1px solid var(--line-dark); display: flex; gap: 12px; font-size: var(--t-sm); }
.price-features li::before { content: "+"; font-family: var(--font-mono); }
.price-features li:last-child { border-bottom: 0; }
.price-card .btn { width: 100%; justify-content: center; padding: 18px; }
.price-card .btn-primary { background: var(--ink); border-color: var(--ink); color: var(--accent); }
.price-card .btn-primary:hover { background: var(--accent); color: var(--ink); }

/* CTA */
.cta { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 35px; }
.cta .section-title { max-width: 16ch; }

/* Footer */
.site-footer { padding: 70px var(--gutter) 24px; border-top: 1px solid var(--line-light); }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 45px; padding-bottom: 70px; }
.footer-top p { color: var(--text-light); max-width: 36ch; margin-top: 18px; }
.footer-col h5 { margin: 0 0 18px; font-family: var(--font-mono); font-size: var(--t-xs); letter-spacing: .08em; text-transform: uppercase; color: var(--text-dim-dark); font-weight: 400; }
.footer-col li + li { margin-top: 8px; }
.footer-col a { font-size: var(--t-sm); color: var(--text-light); transition: color var(--fast); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 24px; border-top: 1px solid var(--line-light); color: var(--text-dim-dark); }
.footer-word { font-family: var(--font-head); font-size: clamp(64px, 17vw, 300px); line-height: .8; letter-spacing: -.05em; text-transform: uppercase; color: transparent; -webkit-text-stroke: 1px var(--line-light); margin: 24px 0 45px; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 960px) {
  :root { --gutter: 18px; --header-h: 65px; }
  .site-header { grid-template-columns: 1fr auto; }
  .nav, .header-actions .btn:not(.btn-primary) { display: none; }
  .hero-bottom, .panel.is-active, .pricing, .hub, .footer-top { grid-template-columns: 1fr; }
  .hero-cta { justify-content: flex-start; }
  .tabs { grid-template-columns: repeat(2, 1fr); }
  .tab:nth-child(2) { border-right: 0; }
  .tab:nth-child(-n+2) { border-bottom: 1px solid var(--line-dark); }
  .grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .hub-core { margin: 0 auto; }
}