:root {
  --brand: #0f1a2e;
  --brand-dark: #0a1220;
  --accent: #115e59;
  --accent-dark: #134e4a;
  --accent-soft: #ccfbf1;
  --logo-rose: #ba4a62;
  --module-ingest: #1d4ed8;
  --module-process: #0d9488;
  --module-act: #d97706;
  --ink-950: #0b1a2c;
  --ink-900: #122b45;
  --ink-800: #1f3d5a;
  --ink-700: #36536b;
  --ink-600: #435a6b;
  --ink-500: #4b6273;
  --ink-300: #d8d6d0;
  --surface: #f0eee9;
  --surface-bright: #ffffff;
  --surface-soft: #f5f4f0;
  --surface-muted: #e6e3db;
  --surface-inset: #ebe8e1;
  --border: rgba(18, 43, 69, 0.16);
  --border-strong: rgba(18, 43, 69, 0.28);
  --shadow-card: 0 1px 2px rgba(15, 26, 46, 0.04), 0 18px 42px rgba(15, 26, 46, 0.09);
  color: var(--ink-900);
  background: var(--surface);
  font-family: "Satoshi", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
}

@font-face {
  font-family: "Satoshi";
  src: url("../fonts/Satoshi-Variable.ttf") format("truetype-variations"),
    url("../fonts/Satoshi-Variable.ttf") format("truetype");
  font-display: swap;
  font-style: normal;
  font-weight: 300 900;
}

@font-face {
  font-family: "Satoshi";
  src: url("../fonts/Satoshi-VariableItalic.ttf") format("truetype-variations"),
    url("../fonts/Satoshi-VariableItalic.ttf") format("truetype");
  font-display: swap;
  font-style: italic;
  font-weight: 300 900;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at 84% 12%, rgba(17, 94, 89, 0.1), transparent 26rem),
    linear-gradient(180deg, #f5f4f0 0%, var(--surface) 42rem);
  margin: 0;
}

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
}

.shell {
  min-height: 100vh;
  overflow: hidden;
}

.nav {
  align-items: center;
  display: flex;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 72px);
  position: relative;
  z-index: 2;
}

.brand,
.nav__links,
.actions {
  align-items: center;
  display: flex;
  gap: 16px;
}

.brand,
.nav__links a,
.button {
  text-decoration: none;
}

.brand {
  font-weight: 800;
}

.brand__mark {
  display: block;
  height: 26px;
  object-fit: contain;
  width: 44px;
}

.brand__wordmark {
  display: block;
  height: 25px;
  object-fit: contain;
  width: 92px;
}

.nav__links {
  color: var(--ink-700);
  font-size: 0.9rem;
  font-weight: 650;
}

.nav__links a {
  border-radius: 6px;
  padding: 8px 2px;
}

.nav__links a:hover {
  color: var(--accent);
}

.hero,
.section {
  padding: clamp(64px, 8vw, 110px) clamp(20px, 5vw, 72px);
}

.hero {
  align-items: center;
  display: grid;
  gap: clamp(36px, 6vw, 84px);
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  min-height: calc(100vh - 76px);
  padding-top: clamp(44px, 6vw, 88px);
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 14px;
  text-transform: uppercase;
}

h1,
h2,
h3,
p,
ol {
  margin-top: 0;
}

h1 {
  font-size: clamp(3.1rem, 7vw, 6.6rem);
  font-weight: 850;
  line-height: 0.97;
  margin-bottom: 24px;
  max-width: 960px;
}

h2 {
  font-size: clamp(2.1rem, 4.6vw, 4.3rem);
  font-weight: 820;
  line-height: 1;
  margin-bottom: 22px;
}

h3 {
  font-size: 1.08rem;
  font-weight: 780;
  line-height: 1.2;
  margin-bottom: 10px;
}

p {
  color: var(--ink-600);
  line-height: 1.55;
}

.lede {
  color: var(--ink-800);
  font-size: clamp(1.16rem, 2vw, 1.42rem);
  line-height: 1.5;
  max-width: 720px;
}

.body-copy {
  font-size: 1.08rem;
  max-width: 680px;
}

.button {
  align-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  color: var(--ink-900);
  cursor: pointer;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 46px;
  padding: 12px 17px;
}

.button--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.button--primary:hover {
  background: var(--accent-dark);
}

.hero-board {
  min-height: 560px;
  position: relative;
}

.system-card,
.trace-card,
.use-case,
.primitive-list article,
.contact-panel {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.system-card {
  box-shadow: var(--shadow-card);
  max-width: 320px;
  padding: 18px;
  position: absolute;
}

.system-card span,
.use-case span,
.trace-card__label,
.metric {
  color: var(--ink-500);
  display: block;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.system-card strong,
.trace-card strong {
  display: block;
  font-size: 1.08rem;
  margin: 6px 0;
}

.system-card small {
  color: var(--ink-600);
  line-height: 1.45;
}

.system-card--stripe {
  background: #eff3ff;
  left: 0;
  top: 22px;
  transform: rotate(-2.5deg);
}

.system-card--contract {
  background: #f0fdfa;
  right: 8px;
  top: 112px;
  transform: rotate(2deg);
}

.system-card--gl {
  background: #fffbeb;
  left: 46px;
  top: 246px;
  transform: rotate(-1deg);
}

.trace-card {
  bottom: 18px;
  box-shadow: 0 24px 70px rgba(15, 26, 46, 0.14);
  padding: 22px;
  position: absolute;
  right: 0;
  width: min(420px, 88%);
}

.trace-card ol {
  color: var(--ink-600);
  line-height: 1.55;
  margin-bottom: 0;
  padding-left: 22px;
}

.section {
  position: relative;
}

.section--warm {
  background: var(--surface-muted);
}

.section--ink {
  background:
    radial-gradient(circle at 82% 12%, rgba(17, 94, 89, 0.24), transparent 26rem),
    var(--brand);
  color: #fff;
}

.section--ink p,
.section--ink .eyebrow,
.section--ink .metric {
  color: rgba(255, 255, 255, 0.78);
}

.section--ink .eyebrow,
.section--ink .metric span,
.proof-stack span {
  color: var(--accent-soft);
}

.section--contact {
  background: linear-gradient(180deg, var(--surface), var(--surface-inset));
}

.section__intro {
  max-width: 780px;
}

.use-case-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 38px;
}

.use-case {
  padding: 22px;
}

.use-case--wide {
  grid-column: span 2;
  grid-row: span 2;
}

.use-case--wide h3 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1;
}

.split {
  align-items: start;
  display: grid;
  gap: clamp(32px, 6vw, 80px);
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  margin: 0 auto;
  max-width: 1180px;
}

.primitive-list {
  display: grid;
  gap: 16px;
}

.proof-stack {
  display: grid;
  gap: 14px;
}

.primitive-list article {
  padding: 22px;
}

.proof-stack article {
  background: rgba(255, 255, 255, 0.075);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 20px;
}

.proof-stack span {
  display: block;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  margin-bottom: 10px;
}

.proof-stack h3 {
  color: #fff;
}

.proof-stack p {
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 0;
}

.primitive-list p,
.use-case p {
  margin-bottom: 0;
}

pre {
  background: var(--brand-dark);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  color: var(--surface-soft);
  margin: 0;
  overflow: auto;
  padding: 24px;
  white-space: pre-wrap;
}

code {
  font-family: "Satoshi", ui-sans-serif, system-ui, sans-serif;
  font-size: 0.9rem;
  line-height: 1.55;
}

.metric {
  margin-top: 28px;
}

.metric span {
  font-size: 2.4rem;
  margin-right: 8px;
  vertical-align: middle;
}

.contact-panel {
  display: grid;
  gap: 34px;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  margin: 0 auto;
  max-width: 1120px;
  padding: clamp(26px, 5vw, 48px);
}

.form {
  display: grid;
  gap: 16px;
}

label {
  color: var(--ink-800);
  display: grid;
  font-weight: 750;
  gap: 8px;
}

input,
textarea {
  background: var(--surface-bright);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  color: var(--ink-900);
  min-height: 44px;
  padding: 12px;
  width: 100%;
}

textarea {
  resize: vertical;
}

.form__status {
  font-size: 0.92rem;
  margin: 0;
  min-height: 1.5em;
}

.form__status[data-state="success"] {
  color: var(--accent);
}

.form__status[data-state="error"] {
  color: #9a3412;
}

@media (max-width: 980px) {
  .hero,
  .split,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .hero-board {
    min-height: 520px;
  }

  .use-case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .nav,
  .nav__links,
  .actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav__links {
    gap: 10px;
  }

  .hero {
    min-height: auto;
  }

  .hero-board {
    min-height: auto;
  }

  .system-card,
  .trace-card {
    margin-bottom: 14px;
    max-width: none;
    position: static;
    transform: none;
    width: 100%;
  }

  .use-case-grid {
    grid-template-columns: 1fr;
  }

  .use-case--wide {
    grid-column: auto;
    grid-row: auto;
  }
}