:root {
  --paper: #f3ecdf;
  --paper-light: #fbf7ef;
  --paper-deep: #e7d8c4;
  --ink: #1d1916;
  --ink-soft: #554a42;
  --line: rgba(29, 25, 22, 0.13);
  --line-strong: rgba(29, 25, 22, 0.24);
  --clay: #b75c32;
  --clay-dark: #87401f;
  --clay-soft: rgba(183, 92, 50, 0.13);
  --moss: #275c4d;
  --moss-dark: #163d34;
  --moss-soft: rgba(39, 92, 77, 0.13);
  --straw: #e5c477;
  --white: #fffaf1;
  --shadow-sm: 0 16px 38px rgba(57, 40, 27, 0.09);
  --shadow-lg: 0 32px 90px rgba(57, 40, 27, 0.16);
  --radius-sm: 12px;
  --radius-md: 22px;
  --radius-lg: 34px;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: "Avenir Next", Avenir, "Gill Sans", "Trebuchet MS", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 7% 3%, rgba(183, 92, 50, 0.19), transparent 25rem),
    radial-gradient(circle at 93% 7%, rgba(39, 92, 77, 0.17), transparent 24rem),
    linear-gradient(180deg, #f8f3ea 0%, var(--paper) 48%, #eadfce 100%);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(29, 25, 22, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 25, 22, 0.035) 1px, transparent 1px);
  background-size: 68px 68px;
  content: "";
  pointer-events: none;
}

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

p {
  text-wrap: pretty;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 18px;
  z-index: 100;
  padding: 12px 18px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--ink);
  color: var(--white);
  font-size: 0.82rem;
  font-weight: 700;
}

.skip-link:focus {
  top: 0;
}

.page-shell {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
  padding-bottom: 32px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  border-bottom: 1px solid rgba(29, 25, 22, 0.08);
  background: linear-gradient(180deg, rgba(248, 243, 234, 0.96), rgba(248, 243, 234, 0.82));
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(255, 250, 241, 0.8);
  box-shadow: var(--shadow-sm);
  color: var(--clay-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-name,
.site-nav a,
.button,
.eyebrow,
.card-kicker,
.system-label,
.plane-index,
.boundary-label {
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.brand-name {
  font-size: 0.78rem;
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 25px;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 700;
}

.site-nav a:not(.nav-cta)::after {
  position: absolute;
  right: 0;
  bottom: 7px;
  left: 0;
  height: 1px;
  background: var(--clay);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.site-nav .nav-cta {
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 250, 241, 0.72);
  color: var(--ink);
}

.section {
  position: relative;
  padding: 78px 0;
  scroll-margin-top: 84px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--clay-dark);
  font-size: 0.74rem;
  font-weight: 800;
}

h1,
h2,
h3,
.thesis-lead,
.credibility-lead {
  font-family: var(--serif);
  font-weight: 600;
}

.credibility-lead a {
  color: var(--clay-dark);
  text-decoration: underline;
  text-decoration-thickness: 0.06em;
  text-underline-offset: 0.12em;
}

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

h1 {
  max-width: 10ch;
  margin-bottom: 0;
  font-size: clamp(3.75rem, 6.5vw, 6rem);
  line-height: 0.9;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

h2 {
  max-width: 12ch;
  margin-bottom: 0;
  font-size: clamp(2.8rem, 5.1vw, 4.8rem);
  line-height: 0.94;
  letter-spacing: -0.05em;
  text-wrap: balance;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.65rem;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(440px, 0.95fr);
  gap: clamp(42px, 6vw, 88px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding-top: 36px;
}

.hero-copy {
  max-width: 680px;
  animation: reveal-up 700ms ease both;
}

.hero-text {
  max-width: 37rem;
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.7vw, 1.23rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
  text-align: center;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-solid {
  background: linear-gradient(135deg, var(--clay) 0%, var(--clay-dark) 100%);
  box-shadow: 0 18px 42px rgba(135, 64, 31, 0.25);
  color: var(--white);
}

.button-ghost {
  border-color: var(--line-strong);
  background: rgba(255, 250, 241, 0.67);
}

.button-light {
  border-color: rgba(255, 250, 241, 0.32);
  background: rgba(255, 250, 241, 0.1);
  color: var(--white);
}

.signal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 20px;
  margin: 22px 0 0;
  padding: 0;
  color: var(--moss);
  font-size: 0.74rem;
  font-weight: 700;
  list-style: none;
}

.signal-list li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.signal-list li::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--moss);
  content: "";
}

.hero-system {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  padding: 28px;
  border: 1px solid rgba(255, 250, 241, 0.12);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 100% 0%, rgba(229, 196, 119, 0.2), transparent 38%),
    linear-gradient(155deg, #214f43 0%, var(--moss-dark) 62%, #102f29 100%);
  box-shadow: var(--shadow-lg);
  color: var(--white);
  animation: system-in 850ms 100ms ease both;
}

.hero-system::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 250, 241, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 250, 241, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  content: "";
  pointer-events: none;
}

.system-topline,
.stack-header,
.graph-topline {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.system-topline {
  color: rgba(255, 250, 241, 0.65);
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #dce9c3;
}

.live-indicator::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #b9d68b;
  box-shadow: 0 0 0 5px rgba(185, 214, 139, 0.13);
  content: "";
  animation: pulse 2.8s ease-in-out infinite;
}

.decision-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-top: 28px;
  padding: 24px;
  border: 1px solid rgba(255, 250, 241, 0.18);
  border-radius: var(--radius-md);
  background: rgba(255, 250, 241, 0.09);
  backdrop-filter: blur(6px);
}

.system-label {
  color: var(--straw);
  font-size: 0.66rem;
  font-weight: 800;
}

.decision-card strong {
  max-width: 14ch;
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.04;
}

.decision-note {
  color: rgba(255, 250, 241, 0.66);
  font-size: 0.76rem;
}

.reasoning-link {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 19px 7px;
  color: rgba(255, 250, 241, 0.64);
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.reasoning-line {
  overflow: hidden;
  height: 1px;
  background: linear-gradient(90deg, rgba(229, 196, 119, 0.25), var(--straw), rgba(229, 196, 119, 0.25));
  font-size: 0;
  line-height: 0;
}

.input-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.input-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1px 10px;
  align-items: center;
  min-height: 86px;
  padding: 15px;
  border: 1px solid rgba(255, 250, 241, 0.15);
  border-radius: 16px;
  background: rgba(255, 250, 241, 0.07);
}

.input-number {
  grid-row: 1 / 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(255, 250, 241, 0.22);
  border-radius: 50%;
  color: var(--straw);
  font-size: 0.63rem;
  font-weight: 800;
}

.input-card strong {
  font-family: var(--serif);
  font-size: 1.14rem;
  font-weight: 600;
}

.input-card small {
  color: rgba(255, 250, 241, 0.61);
  font-size: 0.7rem;
}

.system-receipt {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 19px;
  padding-top: 17px;
  border-top: 1px solid rgba(255, 250, 241, 0.14);
  color: rgba(255, 250, 241, 0.52);
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.thesis-band {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 40px;
  align-items: center;
  margin-top: 18px;
  padding: 38px 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255, 250, 241, 0.84), rgba(240, 229, 214, 0.7));
  box-shadow: var(--shadow-sm);
}

.thesis-lead {
  margin: 0;
  font-size: clamp(2rem, 3.7vw, 3.4rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.thesis-body {
  max-width: 45rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.06rem;
}

.section-heading {
  margin-bottom: 38px;
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: clamp(32px, 7vw, 100px);
  align-items: end;
}

.section-intro {
  max-width: 39rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.equation-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
  padding: 30px 34px;
  border-radius: var(--radius-md);
  background: var(--ink);
  box-shadow: var(--shadow-lg);
  color: var(--white);
  font-family: var(--serif);
  font-size: clamp(1.28rem, 2.5vw, 2.15rem);
}

.equation-result {
  color: var(--straw);
}

.equation-function {
  color: #b9d6ca;
}

.equation-input {
  padding: 6px 11px;
  border: 1px solid rgba(255, 250, 241, 0.18);
  border-radius: 9px;
  background: rgba(255, 250, 241, 0.07);
  font-family: var(--sans);
  font-size: 0.56em;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.equation-symbol {
  color: rgba(255, 250, 241, 0.45);
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.model-card,
.plane-card,
.audience-card,
.faq-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 250, 241, 0.64);
  box-shadow: var(--shadow-sm);
}

.model-card {
  min-height: 240px;
  padding: 24px;
}

.card-kicker {
  display: block;
  margin-bottom: 32px;
  color: var(--clay-dark);
  font-size: 0.66rem;
  font-weight: 800;
}

.model-card p,
.plane-card p,
.audience-card p,
.faq-card p {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 0.93rem;
}

.loop-showcase {
  display: grid;
  grid-template-columns: minmax(300px, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(30px, 6vw, 86px);
  align-items: center;
  padding: clamp(30px, 5vw, 68px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 8% 100%, rgba(180, 86, 48, 0.14), transparent 28%),
    rgba(255, 250, 241, 0.66);
  box-shadow: var(--shadow-sm);
}

.loop-showcase-copy h2 {
  max-width: 11ch;
}

.loop-showcase-copy .section-intro {
  margin-top: 24px;
}

.loop-principles {
  display: grid;
  gap: 10px;
  margin: 28px 0 22px;
}

.loop-principles span {
  padding: 12px 14px;
  border-left: 2px solid var(--clay);
  background: rgba(180, 86, 48, 0.06);
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.loop-principles b {
  color: var(--ink);
}

.loop-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.loop-track > div {
  display: grid;
  align-content: space-between;
  min-height: 150px;
  padding: 17px;
  border: 1px solid rgba(255, 250, 241, 0.12);
  border-radius: 16px;
  background: var(--ink);
  color: var(--white);
}

.loop-track > div:nth-child(5),
.loop-track > div:nth-child(6) {
  grid-column: span 1;
}

.loop-track > div.loop-promote {
  grid-column: span 2;
  background:
    radial-gradient(circle at 100% 0, rgba(229, 196, 119, 0.24), transparent 42%),
    var(--moss);
}

.loop-track span {
  color: var(--straw);
  font-size: 0.64rem;
  font-weight: 800;
}

.loop-track strong {
  margin-top: auto;
  font-size: 1rem;
}

.loop-track small {
  margin-top: 5px;
  color: rgba(255, 250, 241, 0.56);
  font-size: 0.67rem;
  line-height: 1.3;
}

.platform::before,
.audiences::before {
  position: absolute;
  top: 28px;
  right: calc(50% - 50vw);
  bottom: 28px;
  left: calc(50% - 50vw);
  z-index: -1;
  border-top: 1px solid rgba(29, 25, 22, 0.06);
  border-bottom: 1px solid rgba(29, 25, 22, 0.06);
  background: rgba(255, 250, 241, 0.28);
  content: "";
}

.plane-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
}

.plane-card {
  grid-column: span 3;
  min-height: 242px;
  padding: 23px;
}

.plane-featured {
  grid-column: span 6;
  grid-row: span 2;
  min-height: 500px;
  padding: 34px;
  border-color: rgba(39, 92, 77, 0.3);
  background:
    radial-gradient(circle at 92% 8%, rgba(229, 196, 119, 0.28), transparent 28%),
    linear-gradient(145deg, var(--moss) 0%, var(--moss-dark) 100%);
  box-shadow: var(--shadow-lg);
  color: var(--white);
}

.plane-index {
  margin-bottom: 54px;
  color: var(--clay-dark);
  font-size: 0.65rem;
  font-weight: 800;
}

.plane-featured .plane-index {
  color: var(--straw);
}

.plane-featured h3 {
  max-width: 12ch;
  font-size: clamp(2.5rem, 4.6vw, 4.4rem);
  line-height: 0.94;
}

.plane-featured p {
  max-width: 33rem;
  color: rgba(255, 250, 241, 0.72);
  font-size: 1rem;
}

.mini-list {
  display: grid;
  gap: 9px;
  margin: 32px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid rgba(255, 250, 241, 0.17);
  color: rgba(255, 250, 241, 0.78);
  font-size: 0.78rem;
  list-style: none;
}

.mini-list li::before {
  margin-right: 8px;
  color: var(--straw);
  content: "+";
}

.core-library {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(440px, 1.12fr);
  gap: clamp(40px, 6vw, 84px);
  align-items: center;
  overflow: hidden;
  margin: 46px 0;
  padding: clamp(38px, 6vw, 72px);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 94% 8%, rgba(229, 196, 119, 0.18), transparent 32%),
    linear-gradient(145deg, #1b4138 0%, #102f29 100%);
  box-shadow: var(--shadow-lg);
  color: var(--white);
}

.core-library h2 {
  max-width: 10ch;
}

.core-library .eyebrow {
  color: var(--straw);
}

.core-library .section-intro {
  margin-top: 24px;
  color: rgba(255, 250, 241, 0.7);
}

.core-library-copy code,
.core-library-terminal {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.core-library-copy code {
  color: var(--straw);
  font-size: 0.92em;
}

.core-library .button-ghost {
  border-color: rgba(255, 250, 241, 0.28);
  background: rgba(255, 250, 241, 0.08);
  color: var(--white);
}

.core-library-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 28px;
}

.core-library-facts span {
  display: flex;
  flex-direction: column;
  min-height: 74px;
  padding: 13px;
  border: 1px solid rgba(255, 250, 241, 0.12);
  border-radius: 12px;
  color: rgba(255, 250, 241, 0.56);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.core-library-facts b {
  color: var(--white);
  font-family: var(--serif);
  font-size: 1rem;
  letter-spacing: -0.02em;
  text-transform: none;
}

.core-library-terminal {
  overflow: hidden;
  border: 1px solid rgba(255, 250, 241, 0.14);
  border-radius: 22px;
  background: #121b18;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.28);
}

.terminal-bar,
.terminal-output {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 18px;
  color: rgba(255, 250, 241, 0.5);
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.terminal-bar {
  border-bottom: 1px solid rgba(255, 250, 241, 0.1);
}

.core-library-terminal pre {
  overflow-x: auto;
  margin: 0;
  padding: 25px 22px;
  color: #e8e3d8;
  font-size: clamp(0.68rem, 1.1vw, 0.79rem);
  line-height: 1.75;
  tab-size: 2;
}

.core-library-terminal code {
  font-family: inherit;
}

.code-muted {
  color: #86b6a2;
}

.code-accent {
  color: #e7bd70;
}

.terminal-output {
  display: grid;
  grid-template-columns: auto 1fr;
  border-top: 1px solid rgba(255, 250, 241, 0.1);
}

.terminal-output strong {
  color: #b8d9ca;
  font-size: 0.66rem;
  text-align: right;
  text-transform: none;
}

.workflow {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(420px, 1.12fr);
  gap: clamp(44px, 7vw, 96px);
  align-items: center;
}

.workflow-copy h2 {
  max-width: 10ch;
}

.workflow-copy .section-intro {
  margin-top: 24px;
}

.workflow-steps {
  display: grid;
  gap: 0;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.workflow-steps li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 15px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
}

.workflow-steps li > span {
  color: var(--clay-dark);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.workflow-steps strong {
  font-family: var(--serif);
  font-size: 1.12rem;
}

.workflow-steps p {
  margin: 3px 0 0;
  color: var(--ink-soft);
  font-size: 0.83rem;
}

.stack-visual {
  overflow: hidden;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 90% 4%, var(--clay-soft), transparent 31%),
    linear-gradient(145deg, rgba(255, 250, 241, 0.88), rgba(236, 222, 202, 0.72));
  box-shadow: var(--shadow-lg);
}

.stack-header {
  color: var(--ink-soft);
}

.stack-status {
  color: var(--moss);
}

.pack-stack {
  display: grid;
  gap: 8px;
  margin-top: 24px;
}

.pack-layer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 58px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 250, 241, 0.72);
}

.pack-layer span {
  color: var(--ink-soft);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pack-layer strong {
  font-family: var(--serif);
  font-size: 1.04rem;
  font-weight: 600;
}

.pack-project {
  margin-left: 42px;
  border-color: rgba(183, 92, 50, 0.3);
}

.pack-vertical {
  margin-right: 14px;
  margin-left: 28px;
}

.pack-smb {
  margin-right: 28px;
  margin-left: 14px;
}

.pack-core {
  margin-right: 42px;
  border-color: rgba(39, 92, 77, 0.32);
}

.bind-line {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 54px;
  color: var(--ink-soft);
  font-size: 0.61rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.bind-line::before,
.bind-line::after {
  width: 1px;
  height: 14px;
  margin: 0 10px;
  background: var(--line-strong);
  content: "";
}

.graph-card {
  padding: 20px;
  border-radius: 18px;
  background: var(--ink);
  box-shadow: var(--shadow-sm);
  color: var(--white);
}

.graph-topline {
  color: rgba(255, 250, 241, 0.58);
  font-size: 0.59rem;
}

.graph-claims {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  margin-top: 16px;
}

.graph-claims span {
  padding: 9px;
  border: 1px solid rgba(255, 250, 241, 0.14);
  border-radius: 8px;
  background: rgba(255, 250, 241, 0.06);
  color: rgba(255, 250, 241, 0.67);
  font-size: 0.62rem;
  text-align: center;
}

.context-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
  padding: 15px;
  border-radius: 11px;
  background: var(--moss);
}

.context-card span {
  color: var(--straw);
  font-size: 0.59rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.context-card strong {
  font-family: var(--serif);
  font-size: 1.2rem;
}

.context-card small {
  color: rgba(255, 250, 241, 0.62);
  font-size: 0.66rem;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.audience-card {
  display: flex;
  flex-direction: column;
  min-height: 390px;
  padding: 28px;
}

.audience-card h3 {
  max-width: 13ch;
  font-size: 2.05rem;
}

.audience-card p {
  font-size: 0.96rem;
}

.audience-card .text-link {
  margin-top: auto;
  padding-top: 28px;
}

.audience-operator {
  background: linear-gradient(150deg, rgba(255, 250, 241, 0.9), rgba(226, 213, 193, 0.76));
}

.audience-developer {
  border-color: rgba(39, 92, 77, 0.28);
  background: linear-gradient(150deg, rgba(245, 245, 230, 0.9), rgba(203, 221, 208, 0.64));
}

.audience-system {
  border-color: rgba(183, 92, 50, 0.25);
  background: linear-gradient(150deg, rgba(255, 247, 235, 0.9), rgba(234, 201, 177, 0.58));
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--clay-dark);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.text-link span {
  transition: transform 180ms ease;
}

.text-link:hover span,
.text-link:focus-visible span {
  transform: translateX(4px);
}

.transfer {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(40px, 7vw, 92px);
  align-items: center;
}

.transfer-heading h2 {
  max-width: 11ch;
}

.transfer-heading .section-intro {
  margin-top: 24px;
}

.boundary-diagram {
  display: grid;
  grid-template-columns: 1fr 126px 1fr;
  align-items: stretch;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 250, 241, 0.66);
  box-shadow: var(--shadow-lg);
}

.boundary-column {
  padding: 28px;
}

.boundary-product {
  background: var(--moss-dark);
  color: var(--white);
}

.boundary-label {
  display: block;
  margin-bottom: 30px;
  color: var(--clay-dark);
  font-size: 0.66rem;
  font-weight: 800;
}

.boundary-product .boundary-label {
  color: var(--straw);
}

.boundary-column ul {
  display: grid;
  gap: 15px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.boundary-column li {
  padding-bottom: 15px;
  border-bottom: 1px solid var(--line);
  font-size: 0.83rem;
}

.boundary-product li {
  border-color: rgba(255, 250, 241, 0.12);
  color: rgba(255, 250, 241, 0.76);
}

.boundary-bridge {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 11px;
  padding: 18px 10px;
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: var(--paper-deep);
}

.boundary-bridge span {
  padding: 8px 5px;
  border-radius: 7px;
  background: rgba(255, 250, 241, 0.72);
  color: var(--ink-soft);
  font-size: 0.55rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
}

.boundary-note {
  grid-column: 2;
  margin: -54px 20px 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
  text-align: center;
}

.studio-entry {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(420px, 1.12fr);
  gap: 54px;
  align-items: center;
  overflow: hidden;
  margin: 52px 0;
  padding: clamp(36px, 6vw, 70px);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 8% 0%, rgba(183, 92, 50, 0.3), transparent 34%),
    linear-gradient(145deg, #28201c 0%, #181512 100%);
  box-shadow: var(--shadow-lg);
  color: var(--white);
}

.studio-entry .eyebrow {
  color: var(--straw);
}

.studio-entry h2 {
  max-width: 10ch;
}

.studio-entry-copy > p:not(.eyebrow) {
  max-width: 34rem;
  margin-top: 24px;
  color: rgba(255, 250, 241, 0.68);
}

.entry-paths {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.entry-paths a {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 13px;
  align-items: center;
  min-height: 78px;
  padding: 13px 16px;
  border: 1px solid rgba(255, 250, 241, 0.12);
  border-radius: 14px;
  background: rgba(255, 250, 241, 0.055);
  transition: background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.entry-paths a:hover,
.entry-paths a:focus-visible {
  border-color: rgba(229, 196, 119, 0.46);
  background: rgba(255, 250, 241, 0.1);
  transform: translateX(4px);
}

.entry-paths a > span {
  color: var(--straw);
  font-size: 0.64rem;
  font-weight: 800;
}

.entry-paths div {
  display: flex;
  flex-direction: column;
}

.entry-paths strong {
  font-family: var(--serif);
  font-size: 1.08rem;
}

.entry-paths small {
  color: rgba(255, 250, 241, 0.54);
  font-size: 0.69rem;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.faq-card {
  min-height: 190px;
  padding: 25px;
}

.faq-card h3 {
  font-size: 1.4rem;
}

.credibility {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1.05fr);
  gap: 48px;
  align-items: end;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.credibility .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -20px;
}

.credibility-lead {
  margin: 0;
  font-size: clamp(2rem, 3.8vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.credibility-body {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.03rem;
}

.closing {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: 50px;
  align-items: end;
}

.closing-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.closing-action p {
  max-width: 29rem;
  margin-bottom: 22px;
  color: var(--ink-soft);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px 50px;
  align-items: start;
  padding: 34px 0 12px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.footer-brand {
  color: var(--ink);
}

.site-footer > div:first-child p {
  margin: 12px 0 0;
  font-size: 0.78rem;
}

.site-footer > div:first-child .footer-parent {
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 0.7rem;
}

.footer-parent a {
  color: var(--clay-dark);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  justify-content: flex-end;
  font-size: 0.73rem;
  font-weight: 700;
}

.footer-links a,
.copyright {
  min-height: 28px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--clay-dark);
}

.copyright {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.68rem;
}

a:focus-visible,
.button:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 4px;
}

@keyframes reveal-up {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes system-in {
  from {
    opacity: 0;
    transform: translateY(24px) rotate(1.3deg);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotate(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.72;
  }
  50% {
    opacity: 1;
  }
}

@media (max-width: 1080px) {
  .site-nav {
    gap: 16px;
  }

  .hero,
  .core-library,
  .workflow,
  .transfer,
  .loop-showcase {
    grid-template-columns: 1fr;
  }

  .loop-showcase-copy h2 {
    max-width: 14ch;
  }

  .hero {
    min-height: auto;
    padding-top: 70px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-system {
    width: min(100%, 720px);
    justify-self: end;
  }

  .model-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .plane-card {
    grid-column: span 6;
  }

  .plane-featured {
    grid-column: 1 / -1;
    grid-row: auto;
    min-height: 420px;
  }

  .workflow-copy {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 40px;
  }

  .workflow-copy .eyebrow,
  .workflow-copy h2 {
    grid-column: 1;
  }

  .workflow-copy .section-intro,
  .workflow-steps {
    grid-column: 2;
  }

  .workflow-copy .section-intro {
    grid-row: 1 / 3;
    align-self: end;
  }

  .stack-visual {
    width: min(100%, 720px);
    justify-self: end;
  }

  .transfer-heading {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 40px;
    align-items: end;
  }

  .transfer-heading .eyebrow,
  .transfer-heading h2 {
    grid-column: 1;
  }

  .transfer-heading .section-intro {
    grid-column: 2;
    grid-row: 1 / 3;
  }

  .boundary-note {
    grid-column: 1;
    margin: 16px 0 0;
    max-width: 50rem;
    text-align: left;
  }
}

@media (max-width: 820px) {
  .page-shell {
    width: min(100% - 28px, 1240px);
  }

  .site-header {
    position: relative;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 0;
  }

  .site-nav {
    width: 100%;
    gap: 8px 18px;
    overflow-x: auto;
    padding-bottom: 3px;
    scrollbar-width: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .site-nav a {
    flex: 0 0 auto;
  }

  .section {
    padding: 58px 0;
    scroll-margin-top: 24px;
  }

  .loop-showcase {
    padding: 30px;
  }

  .core-library {
    margin: 24px 0;
    padding: 34px;
  }

  .hero {
    gap: 40px;
    padding-top: 52px;
  }

  .split-heading,
  .thesis-band,
  .credibility,
  .closing,
  .studio-entry {
    grid-template-columns: 1fr;
  }

  .split-heading {
    gap: 24px;
    align-items: start;
  }

  .thesis-band {
    gap: 24px;
    padding: 30px;
  }

  .audience-grid {
    grid-template-columns: 1fr;
  }

  .audience-card {
    min-height: 310px;
  }

  .workflow-copy,
  .transfer-heading {
    display: block;
  }

  .workflow-copy .section-intro,
  .transfer-heading .section-intro {
    margin-top: 22px;
  }

  .boundary-diagram {
    grid-template-columns: 1fr;
  }

  .boundary-bridge {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border: 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .studio-entry {
    gap: 40px;
    margin: 28px 0;
  }

  .credibility {
    gap: 26px;
  }

  .credibility .eyebrow {
    margin-bottom: -8px;
  }

  .closing {
    gap: 28px;
  }

  .faq-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .page-shell {
    width: min(100% - 20px, 1240px);
  }

  .site-nav a:not(.nav-cta) {
    display: none;
  }

  .site-nav {
    overflow: visible;
  }

  .site-nav .nav-cta {
    min-height: 36px;
  }

  h1 {
    max-width: 100%;
    font-size: clamp(3rem, 15.2vw, 4.35rem);
  }

  h2 {
    max-width: 100%;
    font-size: clamp(2.45rem, 12vw, 3.45rem);
  }

  .hero {
    padding-top: 42px;
  }

  .hero-text {
    margin-top: 22px;
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .signal-list {
    display: grid;
    gap: 7px;
  }

  .hero-system {
    min-height: auto;
    padding: 20px;
    border-radius: 26px;
  }

  .system-topline {
    font-size: 0.58rem;
  }

  .decision-card {
    padding: 19px;
  }

  .input-card {
    min-height: 78px;
    padding: 11px;
  }

  .input-number {
    width: 25px;
    height: 25px;
  }

  .input-card strong {
    font-size: 0.96rem;
  }

  .input-card small {
    font-size: 0.61rem;
  }

  .system-receipt {
    font-size: 0.48rem;
  }

  .thesis-band {
    margin-top: 0;
    padding: 25px;
  }

  .equation-panel {
    gap: 8px;
    padding: 23px;
  }

  .equation-input {
    padding: 5px 8px;
  }

  .model-grid,
  .plane-grid {
    grid-template-columns: 1fr;
  }

  .loop-showcase {
    padding: 24px;
  }

  .core-library {
    margin-right: -2px;
    margin-left: -2px;
    padding: 28px 20px;
    border-radius: 26px;
  }

  .core-library-facts {
    grid-template-columns: 1fr;
  }

  .core-library-facts span {
    min-height: 62px;
  }

  .core-library-terminal pre {
    padding: 20px 17px;
    font-size: 0.64rem;
  }

  .loop-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .loop-track > div.loop-promote {
    grid-column: 1 / -1;
  }

  .model-card,
  .plane-card,
  .plane-featured {
    grid-column: 1;
    min-height: auto;
  }

  .model-card,
  .plane-card {
    padding: 22px;
  }

  .plane-featured {
    padding: 27px;
  }

  .plane-index {
    margin-bottom: 34px;
  }

  .plane-featured h3 {
    font-size: 2.7rem;
  }

  .stack-visual {
    padding: 18px;
    border-radius: 26px;
  }

  .pack-layer {
    align-items: flex-start;
    flex-direction: column;
    gap: 1px;
  }

  .pack-project {
    margin-left: 22px;
  }

  .pack-vertical {
    margin-right: 7px;
    margin-left: 15px;
  }

  .pack-smb {
    margin-right: 15px;
    margin-left: 7px;
  }

  .pack-core {
    margin-right: 22px;
  }

  .graph-topline {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .graph-claims {
    grid-template-columns: 1fr;
  }

  .audience-card {
    min-height: 340px;
    padding: 24px;
  }

  .boundary-column {
    padding: 24px;
  }

  .boundary-bridge {
    grid-template-columns: 1fr;
  }

  .studio-entry {
    margin-right: -2px;
    margin-left: -2px;
    padding: 28px 22px;
    border-radius: 26px;
  }

  .entry-paths a {
    min-height: 86px;
  }

  .faq-card {
    min-height: auto;
    padding: 22px;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-links {
    display: grid;
    justify-content: start;
  }

  .copyright {
    grid-column: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}