:root {
  --paper: #f4f2eb;
  --paper-deep: #e9e6dc;
  --ink: #17201b;
  --ink-soft: #4f5a54;
  --ink-faint: #737c77;
  --line: rgba(23, 32, 27, 0.16);
  --line-strong: rgba(23, 32, 27, 0.3);
  --green: #177a51;
  --green-dark: #0d5135;
  --green-pale: #dcebe2;
  --white: #fffefa;
  --charcoal: #162019;
  --charcoal-2: #1e2922;
  --amber: #b77c2d;
  --radius: 1.1rem;
  --shadow: 0 24px 70px rgba(23, 32, 27, 0.1);
  --page: min(1240px, calc(100vw - 40px));
}

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

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(23, 32, 27, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 32, 27, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 40px 40px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.17;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.08'/%3E%3C/svg%3E");
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

:focus-visible {
  outline: 3px solid rgba(23, 122, 81, 0.55);
  outline-offset: 4px;
}

::selection {
  color: var(--white);
  background: var(--green);
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-180%);
  transition: transform 160ms ease;
}

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

.shell {
  width: var(--page);
  margin-inline: auto;
}

.product-rail {
  position: relative;
  z-index: 70;
  min-height: 42px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.74);
  background: var(--ink);
  font-size: 0.72rem;
  letter-spacing: 0.095em;
  text-transform: uppercase;
}

.product-rail__inner {
  display: flex;
  align-items: stretch;
  min-height: 42px;
}

.product-rail__label {
  display: flex;
  align-items: center;
  padding-right: 1.15rem;
  color: rgba(255, 255, 255, 0.42);
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.product-rail a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0 1.15rem;
  text-decoration: none;
  transition: color 160ms ease, background 160ms ease;
}

.product-rail a:hover,
.product-rail a[aria-current="page"] {
  color: var(--white);
  background: rgba(255, 255, 255, 0.055);
}

.product-rail a[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 1.15rem;
  bottom: -1px;
  left: 1.15rem;
  height: 2px;
  background: #6bc79b;
}

.product-number {
  color: #6bc79b;
  font-variant-numeric: tabular-nums;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 242, 235, 0.93);
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(16px);
}

.site-header__inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  min-width: max-content;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.brand__mark {
  position: relative;
  display: block;
  width: 54px;
  height: 42px;
  overflow: hidden;
  flex: 0 0 54px;
}

.brand__mark img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: contain;
}

.site-header .brand__mark img {
  mix-blend-mode: multiply;
}

.brand__name {
  display: block;
  font-size: 0.93rem;
  font-weight: 760;
  letter-spacing: -0.02em;
}

.brand__descriptor {
  display: block;
  color: var(--ink-faint);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.095em;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--ink-soft);
  font-size: 0.83rem;
  font-weight: 650;
}

.desktop-nav a {
  text-decoration: none;
}

.desktop-nav a:hover {
  color: var(--green-dark);
}

.product-menu {
  position: relative;
}

.product-menu summary {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  list-style: none;
}

.product-menu summary::-webkit-details-marker {
  display: none;
}

.product-menu summary::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}

.product-menu[open] summary {
  color: var(--green-dark);
}

.product-menu__panel {
  position: absolute;
  top: calc(100% + 1.2rem);
  left: -1.2rem;
  display: grid;
  width: 340px;
  padding: 0.55rem;
  gap: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: var(--white);
  box-shadow: 0 24px 55px rgba(23, 32, 27, 0.16);
}

.product-menu__panel::before {
  content: "";
  position: absolute;
  top: -1.25rem;
  right: 0;
  left: 0;
  height: 1.25rem;
}

.product-menu__panel a {
  display: grid;
  padding: 0.85rem 0.9rem;
  border-radius: 0.55rem;
  grid-template-columns: 28px 1fr;
  text-decoration: none;
}

.product-menu__panel a:hover {
  background: var(--green-pale);
}

.product-menu__panel span {
  grid-row: 1 / 3;
  color: var(--green);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.62rem;
}

.product-menu__panel strong {
  color: var(--ink);
  font-size: 0.82rem;
}

.product-menu__panel small {
  margin-top: 0.1rem;
  color: var(--ink-faint);
  font-size: 0.67rem;
  font-weight: 500;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
}

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

.mobile-nav {
  padding: 0 20px 1rem;
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.mobile-nav a {
  display: block;
  padding: 0.8rem 0;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.8rem 1.15rem;
  border: 1px solid var(--ink);
  border-radius: 0.65rem;
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.035em;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, color 160ms ease, background 160ms ease;
}

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

.button--primary {
  color: var(--white);
  background: var(--ink);
  box-shadow: 0 10px 24px rgba(23, 32, 27, 0.14);
}

.button--primary:hover {
  background: var(--green-dark);
  box-shadow: 0 14px 34px rgba(13, 81, 53, 0.2);
}

.button--secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.42);
}

.button--secondary:hover {
  color: var(--green-dark);
  border-color: var(--green);
  background: var(--white);
}

.button--light {
  color: var(--ink);
  border-color: var(--white);
  background: var(--white);
}

.button svg {
  width: 16px;
  height: 16px;
}

.hero {
  position: relative;
  overflow: clip;
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(50% - 1px);
  width: 1px;
  background: var(--line);
}

.hero__grid {
  display: grid;
  min-height: 720px;
  grid-template-columns: 0.9fr 1.1fr;
}

.hero__copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6.8rem 5.5rem 6.2rem 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1.4rem;
  color: var(--green-dark);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 30px;
  height: 1px;
  background: currentColor;
}

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

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  max-width: 720px;
  margin-bottom: 1.55rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3.4rem, 6.2vw, 6.7rem);
  font-weight: 400;
  letter-spacing: -0.062em;
  line-height: 0.93;
}

h1 em {
  color: var(--green);
  font-style: normal;
}

.hero__lead {
  max-width: 640px;
  margin-bottom: 2rem;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.3vw, 1.18rem);
  line-height: 1.72;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.2rem;
  margin: 2.6rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.69rem;
  letter-spacing: 0.04em;
  list-style: none;
}

.hero__facts li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero__facts li::before {
  content: "";
  width: 6px;
  height: 6px;
  border: 1px solid var(--green);
  border-radius: 50%;
}

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 0;
}

.hero__visual::after {
  content: "";
  position: absolute;
  inset: 14% 0 14% 10%;
  z-index: -1;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.hero__visual img {
  width: min(1000px, 67vw);
  height: auto;
  max-width: none;
  margin-left: -5.5rem;
  mix-blend-mode: multiply;
}

.visual-caption {
  position: absolute;
  right: 0;
  bottom: 3rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.8rem;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  background: rgba(244, 242, 235, 0.82);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.visual-caption::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(23, 122, 81, 0.12);
}

.fact-band {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 254, 250, 0.38);
}

.fact-band__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.fact {
  min-height: 122px;
  padding: 1.7rem 1.5rem;
  border-right: 1px solid var(--line);
}

.fact:first-child {
  padding-left: 0;
}

.fact:last-child {
  border-right: 0;
}

.fact strong {
  display: block;
  margin-bottom: 0.2rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2.1rem;
  font-weight: 400;
  letter-spacing: -0.045em;
}

.fact span {
  color: var(--ink-faint);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.section {
  padding: 8rem 0;
  border-bottom: 1px solid var(--line);
}

.section--compact {
  padding: 5.5rem 0;
}

.section--dark {
  color: #edf4ef;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    var(--charcoal);
  background-size: 40px 40px;
}

.section--dark .eyebrow {
  color: #6bc79b;
}

.section--dark .section-heading p,
.section--dark .body-copy {
  color: #aebbb3;
}

.section-heading {
  display: grid;
  align-items: end;
  margin-bottom: 3.5rem;
  gap: 2rem;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.55fr);
}

.section-heading h2 {
  max-width: 820px;
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.7rem, 5vw, 5rem);
  font-weight: 400;
  letter-spacing: -0.052em;
  line-height: 0.98;
}

.section-heading p {
  max-width: 560px;
  margin-bottom: 0.2rem;
  color: var(--ink-soft);
}

.product-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1.65fr) minmax(320px, 0.75fr);
}

.product-card {
  position: relative;
  display: flex;
  min-height: 470px;
  overflow: hidden;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(1.6rem, 3vw, 2.8rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 254, 250, 0.68);
  box-shadow: var(--shadow);
}

.product-card--primary {
  color: #f2f7f3;
  border-color: rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(circle at 78% 14%, rgba(84, 184, 135, 0.2), transparent 29%),
    var(--ink);
}

.product-card__number {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.product-card__number::after {
  content: "";
  width: 42px;
  height: 1px;
  background: currentColor;
  opacity: 0.35;
}

.product-card h3 {
  max-width: 660px;
  margin: auto 0 1rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.2rem, 3.8vw, 4.2rem);
  font-weight: 400;
  letter-spacing: -0.05em;
  line-height: 0.98;
}

.product-card p {
  max-width: 650px;
  margin-bottom: 1.8rem;
  color: var(--ink-soft);
}

.product-card--primary p {
  color: #b7c5bd;
}

.product-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1.9rem;
}

.tag {
  padding: 0.45rem 0.62rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.product-card--primary .tag {
  color: #c9d8cf;
  border-color: rgba(255, 255, 255, 0.17);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--green-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.055em;
  text-decoration: none;
  text-transform: uppercase;
}

.text-link::after {
  content: "↗";
  font-size: 1rem;
  transition: transform 160ms ease;
}

.text-link:hover::after {
  transform: translate(2px, -2px);
}

.product-card--primary .text-link {
  color: #79d1a5;
}

.engine-layout {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.engine-card {
  min-height: 460px;
  padding: clamp(1.5rem, 3vw, 2.7rem);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
}

.engine-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
}

.engine-card__code {
  color: #6bc79b;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
}

.engine-card__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #aebbb3;
  font-size: 0.7rem;
}

.engine-card__status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #6bc79b;
}

.engine-card--amber .engine-card__code {
  color: #d6a65c;
}

.engine-card--amber .engine-card__status::before {
  background: #d6a65c;
}

.engine-card h3 {
  margin-bottom: 1.1rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.3rem, 4vw, 4rem);
  font-weight: 400;
  letter-spacing: -0.05em;
}

.engine-card p {
  max-width: 570px;
  color: #aebbb3;
}

.engine-list {
  display: grid;
  margin: 2.2rem 0 0;
  padding: 0;
  gap: 0.75rem;
  list-style: none;
}

.engine-list li {
  display: grid;
  grid-template-columns: 22px 1fr;
  color: #d4ded8;
  font-size: 0.86rem;
}

.engine-list li::before {
  content: "—";
  color: #6bc79b;
}

.engine-card--amber .engine-list li::before {
  color: #d6a65c;
}

.routing {
  margin-top: 1rem;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.025);
}

.routing__label {
  margin-bottom: 1.2rem;
  color: #aebbb3;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.routing__flow {
  display: grid;
  align-items: center;
  grid-template-columns: repeat(7, auto);
}

.routing__node {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem;
  color: #edf4ef;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-align: center;
  text-transform: uppercase;
}

.routing__line {
  width: clamp(24px, 4vw, 70px);
  height: 1px;
  background: linear-gradient(90deg, rgba(107, 199, 155, 0.2), #6bc79b, rgba(107, 199, 155, 0.2));
}

.process-grid {
  display: grid;
  counter-reset: process;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
}

.process-step {
  min-height: 330px;
  padding: 2rem 2rem 2rem 0;
  border-right: 1px solid var(--line);
  counter-increment: process;
}

.process-step + .process-step {
  padding-left: 2rem;
}

.process-step:last-child {
  padding-right: 0;
  border-right: 0;
}

.process-step::before {
  content: "0" counter(process);
  display: block;
  margin-bottom: 5rem;
  color: var(--green);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

.process-step h3 {
  margin-bottom: 0.8rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: -0.035em;
}

.process-step p {
  color: var(--ink-soft);
}

.evidence-grid {
  display: grid;
  align-items: center;
  gap: clamp(2rem, 6vw, 7rem);
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
}

.evidence-visual {
  position: relative;
  overflow: hidden;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 254, 250, 0.65);
  box-shadow: var(--shadow);
}

.evidence-visual img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
}

.evidence-visual__label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0.2rem 0;
  color: var(--ink-faint);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.61rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.evidence-copy h2 {
  margin-bottom: 1.5rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.7rem, 4.7vw, 4.8rem);
  font-weight: 400;
  letter-spacing: -0.052em;
  line-height: 1;
}

.evidence-copy p {
  color: var(--ink-soft);
}

.check-list {
  display: grid;
  margin: 2rem 0;
  padding: 0;
  gap: 0;
  list-style: none;
}

.check-list li {
  display: grid;
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
  grid-template-columns: 24px 1fr;
  font-size: 0.86rem;
  font-weight: 650;
}

.check-list li::before {
  content: "✓";
  color: var(--green);
}

.sonic-section {
  overflow: hidden;
}

.sonic-layout {
  display: grid;
  min-height: 560px;
  grid-template-columns: 0.95fr 1.05fr;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.sonic-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 5vw, 5rem);
}

.sonic-copy h2 {
  margin-bottom: 1.2rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.8rem, 5vw, 5.1rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.96;
}

.sonic-copy p {
  color: var(--ink-soft);
}

.sonic-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.sonic-visual {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 560px;
  place-items: center;
  overflow: hidden;
  border-left: 1px solid var(--line);
  background: #06111f;
}

.sonic-visual img {
  display: block;
  width: 100%;
  height: auto;
  min-width: 0;
  max-width: 100%;
  object-fit: contain;
}

.principles {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, 1fr);
  background: var(--line);
  border: 1px solid var(--line);
}

.principle {
  min-height: 290px;
  padding: 2rem;
  background: var(--paper);
}

.principle__index {
  display: block;
  margin-bottom: 5rem;
  color: var(--green);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
}

.principle h3 {
  margin-bottom: 0.8rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.8rem;
  font-weight: 400;
  letter-spacing: -0.035em;
}

.principle p {
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.faq {
  display: grid;
  gap: 1rem;
  grid-template-columns: 0.64fr 1fr;
}

.faq__intro {
  padding-right: 3rem;
}

.faq__intro h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.8rem, 4.8vw, 4.8rem);
  font-weight: 400;
  letter-spacing: -0.05em;
  line-height: 1;
}

.faq__items {
  border-top: 1px solid var(--line-strong);
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  font-weight: 720;
  list-style: none;
}

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

.faq summary::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--green);
  font-family: ui-monospace, monospace;
  font-size: 1.25rem;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  max-width: 740px;
  padding: 0 2rem 1.6rem 0;
  color: var(--ink-soft);
}

.cta {
  padding: 6.5rem 0;
  color: #f1f6f2;
  background: var(--ink);
}

.cta__inner {
  display: grid;
  align-items: end;
  gap: 2rem;
  grid-template-columns: minmax(0, 1fr) auto;
}

.cta h2 {
  max-width: 860px;
  margin-bottom: 0.8rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 5.2vw, 5.4rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.95;
}

.cta p {
  max-width: 650px;
  margin-bottom: 0;
  color: #aebbb3;
}

.footer {
  padding: 4rem 0 2rem;
  color: #cbd6cf;
  background: #101713;
}

.footer__top {
  display: grid;
  gap: 3rem;
  grid-template-columns: minmax(280px, 1.2fr) repeat(3, minmax(150px, 0.5fr));
}

.footer .brand__name {
  color: var(--white);
}

.footer .brand__descriptor {
  color: #87958c;
}

.footer__statement {
  max-width: 410px;
  margin: 1.6rem 0 0;
  color: #8f9d94;
  font-size: 0.86rem;
}

.footer h3 {
  margin-bottom: 1rem;
  color: #738079;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.64rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer li + li {
  margin-top: 0.65rem;
}

.footer a {
  color: #cbd6cf;
  font-size: 0.82rem;
  text-decoration: none;
}

.footer a:hover {
  color: #79d1a5;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 1.4rem;
  color: #65736a;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.7rem;
}

.page-hero {
  padding: 7rem 0 5.5rem;
  border-bottom: 1px solid var(--line);
}

.page-hero__grid {
  display: grid;
  align-items: end;
  gap: 4rem;
  grid-template-columns: 1fr minmax(320px, 0.5fr);
}

.page-hero h1 {
  max-width: 950px;
  margin-bottom: 1.6rem;
}

.page-hero__aside {
  padding-left: 2rem;
  border-left: 1px solid var(--line-strong);
}

.page-hero__aside p {
  color: var(--ink-soft);
}

.breadcrumb {
  margin-bottom: 2rem;
  color: var(--ink-faint);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.breadcrumb a {
  color: var(--green-dark);
  text-decoration: none;
}

.spec-table {
  display: grid;
  grid-template-columns: 0.55fr 1fr;
  border-top: 1px solid var(--line-strong);
}

.spec-table dt,
.spec-table dd {
  margin: 0;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}

.spec-table dt {
  color: var(--ink-faint);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.67rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.spec-table dd {
  color: var(--ink-soft);
}

[data-reveal] {
  opacity: 1;
  transform: translateY(0);
}

.js [data-reveal] {
  opacity: 1;
  transform: translateY(18px);
  transition: transform 420ms ease;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1000px) {
  :root {
    --page: min(100% - 32px, 860px);
  }

  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: inline-grid;
    place-items: center;
  }

  .hero::before {
    display: none;
  }

  .hero__grid,
  .section-heading,
  .evidence-grid,
  .sonic-layout,
  .page-hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__grid {
    min-height: auto;
  }

  .hero__copy {
    padding: 5.5rem 0 1.2rem;
  }

  .hero__visual {
    min-height: 430px;
  }

  .hero__visual img {
    width: 112%;
    margin-left: -6%;
  }

  .visual-caption {
    bottom: 1.2rem;
  }

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

  .product-card {
    min-height: 390px;
  }

  .sonic-visual {
    min-height: 420px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .footer__top {
    grid-template-columns: 1.2fr 1fr 1fr;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  :root {
    --page: min(100% - 24px, 620px);
  }

  .product-rail {
    overflow-x: auto;
  }

  .product-rail__inner {
    width: max-content;
  }

  .product-rail__label {
    display: none;
  }

  .product-rail a {
    min-height: 42px;
    padding-inline: 0.85rem;
  }

  .site-header__inner {
    min-height: 66px;
  }

  .brand__mark {
    width: 49px;
    height: 38px;
    flex-basis: 49px;
  }

  .brand__mark img {
    width: 100%;
    height: 100%;
  }

  h1 {
    font-size: clamp(3.15rem, 16vw, 4.7rem);
  }

  .hero__copy {
    padding-top: 4.5rem;
  }

  .hero__lead {
    font-size: 1rem;
  }

  .hero__actions .button {
    width: 100%;
  }

  .hero__facts {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .hero__visual {
    min-height: 330px;
  }

  .hero__visual img {
    width: 135%;
    margin-left: -31%;
  }

  .visual-caption {
    right: auto;
    left: 0;
  }

  .fact-band__grid,
  .engine-layout,
  .process-grid,
  .principles {
    grid-template-columns: 1fr;
  }

  .fact {
    min-height: auto;
    padding: 1.25rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .fact:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 5.5rem 0;
  }

  .section--compact {
    padding: 4rem 0;
  }

  .section-heading {
    margin-bottom: 2.2rem;
    gap: 1.2rem;
  }

  .section-heading h2,
  .evidence-copy h2,
  .faq__intro h2 {
    font-size: clamp(2.55rem, 13vw, 3.7rem);
  }

  .product-card,
  .engine-card {
    min-height: 0;
  }

  .product-card h3,
  .engine-card h3 {
    margin-top: 4rem;
  }

  .engine-card__top {
    margin-bottom: 2rem;
  }

  .routing {
    overflow-x: auto;
  }

  .routing__flow {
    min-width: 720px;
  }

  .process-step,
  .process-step + .process-step {
    min-height: 0;
    padding: 2rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .process-step:last-child {
    border-bottom: 0;
  }

  .process-step::before,
  .principle__index {
    margin-bottom: 2.2rem;
  }

  .sonic-copy {
    padding: 2rem 1.4rem 2.5rem;
  }

  .sonic-visual {
    min-height: 330px;
  }

  .principle {
    min-height: 0;
  }

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

  .faq__intro {
    padding-right: 0;
  }

  .cta__inner {
    align-items: start;
    grid-template-columns: 1fr;
  }

  .cta .button {
    width: 100%;
  }

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

  .footer__brand {
    grid-column: 1 / -1;
  }

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

  .page-hero {
    padding: 4.5rem 0 4rem;
  }

  .page-hero__aside {
    padding: 1.5rem 0 0;
    border-top: 1px solid var(--line-strong);
    border-left: 0;
  }

  .spec-table {
    grid-template-columns: 1fr;
  }

  .spec-table dt {
    padding-bottom: 0.25rem;
    border-bottom: 0;
  }

  .spec-table dd {
    padding-top: 0.25rem;
  }
}

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

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

@media print {
  .product-rail,
  .site-header,
  .cta,
  .menu-button {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  .section--dark,
  .footer {
    color: #000;
    background: #fff;
  }
}