@font-face {
  font-family: "Source Sans 3";
  src: url("assets/SourceSans3-VariableFont_wght.ttf") format("truetype");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

:root {
  --ink: #081217;
  --ink-soft: #102127;
  --steel: #42545b;
  --mist: #a9bbb9;
  --paper: #f0f4f1;
  --paper-deep: #dfe8e4;
  --white: #fbfdfc;
  --lume: #5ee5d2;
  --lume-deep: #17bfa9;
  --signal: #e8ff66;
  --brand-blue: #2f5dab;
  --line-dark: rgba(255, 255, 255, 0.16);
  --line-light: rgba(8, 18, 23, 0.2);
  --shell: min(1420px, calc(100vw - 72px));
  --header-height: 78px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body.is-locked { overflow: hidden; }

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

button, input, select { font: inherit; }

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

a { color: inherit; }

[hidden] { display: none !important; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 16px;
  background: var(--lume);
  color: var(--ink);
  transform: translateY(-160%);
}

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

.prototype-bar {
  min-height: 34px;
  padding: 7px 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: var(--lume);
  color: var(--ink);
  font-size: 13px;
  line-height: 1.25;
  letter-spacing: 0.015em;
}

.prototype-bar span {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.prototype-bar p { margin: 0; }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  height: var(--header-height);
  padding: 0 36px;
  display: grid;
  grid-template-columns: 170px 1fr auto;
  align-items: center;
  gap: 28px;
  background: rgba(8, 18, 23, 0.94);
  border-bottom: 1px solid var(--line-dark);
  color: var(--white);
  backdrop-filter: blur(18px);
}

.brand { width: 112px; display: block; }

.brand img { width: 100%; height: auto; }

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(22px, 3vw, 48px);
}

.desktop-nav a,
.bag-trigger {
  position: relative;
  border: 0;
  background: transparent;
  color: rgba(251, 253, 252, 0.76);
  text-decoration: none;
  font-size: 14px;
  font-weight: 620;
  letter-spacing: 0.035em;
  cursor: pointer;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 1px;
  background: var(--lume);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 240ms var(--ease);
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible,
.desktop-nav a[aria-current="page"] { color: var(--white); }

.desktop-nav a:hover::after,
.desktop-nav a:focus-visible::after,
.desktop-nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }

.header-actions { display: flex; align-items: center; gap: 18px; }

.bag-trigger span {
  min-width: 22px;
  height: 22px;
  margin-left: 5px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  color: var(--white);
  font-size: 12px;
}

.button {
  min-height: 52px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 0;
  text-decoration: none;
  font-weight: 760;
  letter-spacing: 0.025em;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms var(--ease);
}

.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0); }

.button-compact { min-height: 42px; padding: 0 18px; font-size: 14px; }
.button-lume { background: var(--lume); color: var(--ink); }
.button-lume:hover { background: var(--signal); }
.button-ghost { border-color: rgba(255,255,255,0.34); color: var(--white); background: transparent; }
.button-ghost:hover { border-color: var(--white); background: rgba(255,255,255,0.07); }
.button-ink { background: var(--ink); color: var(--white); }
.button-ink:hover { background: var(--brand-blue); }

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-dark);
  background: transparent;
  cursor: pointer;
}

.menu-toggle span { width: 20px; height: 1px; margin: 5px auto; display: block; background: var(--white); transition: transform 200ms ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3px) rotate(-45deg); }

.mobile-menu {
  position: absolute;
  top: var(--header-height);
  right: 0;
  left: 0;
  padding: 18px 24px 28px;
  display: grid;
  background: var(--ink);
  border-bottom: 1px solid var(--line-dark);
}

.mobile-menu a,
.mobile-menu button {
  padding: 16px 0;
  border: 0;
  border-bottom: 1px solid var(--line-dark);
  background: none;
  color: var(--white);
  text-align: left;
  text-decoration: none;
  font-size: 17px;
}

.section-index,
.coordinate-label,
.instrument-caption,
.optic-meta,
.field-image figcaption,
.price-pending span,
.purchase-caveat span,
.order-review-head,
.checkout-footer,
.product-keyline span {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-index { margin: 0 0 24px; color: var(--brand-blue); }
.section-index.on-dark { color: var(--lume); }

.hero {
  min-height: calc(100svh - 112px);
  display: grid;
  grid-template-columns: minmax(390px, 42%) 1fr;
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--white);
}

.hero-copy {
  min-width: 0;
  padding: clamp(70px, 8vw, 132px) clamp(40px, 6vw, 100px) 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  z-index: 2;
  border-right: 1px solid var(--line-dark);
}

.hero-copy::before {
  content: "";
  position: absolute;
  top: 0;
  right: 44px;
  bottom: 0;
  width: 1px;
  background: rgba(255,255,255,0.06);
}

.coordinate-label { display: flex; gap: 22px; color: var(--lume); }
.coordinate-label span:last-child { color: rgba(255,255,255,0.52); }

.hero h1 {
  max-width: 760px;
  margin: 38px 0 30px;
  font-size: clamp(62px, 6.3vw, 112px);
  line-height: 0.88;
  letter-spacing: -0.065em;
  font-weight: 670;
}

.hero h1 em { color: var(--lume); font-style: normal; font-weight: 300; }

.hero-lead { max-width: 590px; margin: 0; color: rgba(251,253,252,0.72); font-size: clamp(18px, 1.55vw, 24px); line-height: 1.45; }
.hero-actions { margin-top: 42px; display: flex; flex-wrap: wrap; gap: 12px; }

.purchase-status {
  max-width: 510px;
  margin-top: 46px;
  padding-top: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  border-top: 1px solid var(--line-dark);
  color: rgba(251,253,252,0.58);
  font-size: 14px;
}

.purchase-status p { margin: 0; }
.purchase-status strong { color: var(--white); font-weight: 650; }
.status-pip { width: 8px; height: 8px; margin-top: 6px; flex: 0 0 auto; border-radius: 50%; background: var(--signal); box-shadow: 0 0 18px rgba(232,255,102,0.7); }

.hero-visual { min-width: 0; min-height: 620px; position: relative; overflow: hidden; }
.hero-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,18,23,0.35), transparent 28%), linear-gradient(0deg, rgba(8,18,23,0.4), transparent 40%); pointer-events: none; }
.hero-visual > img { width: 100%; height: 100%; object-fit: cover; object-position: 60% center; filter: saturate(0.82) contrast(1.06); }

.viewfinder { position: absolute; z-index: 2; right: clamp(30px, 5vw, 92px); bottom: clamp(40px, 6vw, 88px); width: min(370px, calc(100% - 60px)); height: 260px; padding: 34px; background: rgba(2,11,15,0.55); backdrop-filter: blur(8px); color: var(--white); }
.corner { position: absolute; width: 26px; height: 26px; border-color: var(--lume); border-style: solid; }
.corner-a { top: 0; left: 0; border-width: 2px 0 0 2px; }
.corner-b { top: 0; right: 0; border-width: 2px 2px 0 0; }
.corner-c { right: 0; bottom: 0; border-width: 0 2px 2px 0; }
.corner-d { bottom: 0; left: 0; border-width: 0 0 2px 2px; }
.sample-readout > span { color: var(--lume); font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: 0.14em; }
.sample-readout > strong { margin: 10px 0 22px; display: block; color: var(--signal); font-size: 68px; line-height: 0.88; font-weight: 420; letter-spacing: -0.04em; }
.sample-readout > strong small { margin-left: 7px; font-size: 18px; font-weight: 500; }
.sample-readout dl { margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.sample-readout dl div { padding-top: 8px; border-top: 1px solid rgba(255,255,255,0.25); }
.sample-readout dt { color: rgba(255,255,255,0.55); font-size: 10px; letter-spacing: 0.12em; }
.sample-readout dd { margin: 3px 0 0; font-family: ui-monospace, monospace; font-size: 15px; }
.viewfinder > p { position: absolute; right: 8px; bottom: -24px; margin: 0; color: rgba(255,255,255,0.48); font-family: ui-monospace, monospace; font-size: 10px; text-transform: uppercase; }

.depth-scale { position: absolute; z-index: 3; top: 80px; right: 10px; bottom: 26px; display: flex; flex-direction: column; justify-content: space-between; color: rgba(255,255,255,0.45); font-family: ui-monospace, monospace; font-size: 9px; }
.depth-scale::before { content: ""; position: absolute; top: 4px; bottom: 4px; left: -12px; border-left: 1px dashed rgba(255,255,255,0.2); }

.manifesto {
  padding: clamp(88px, 10vw, 170px) max(36px, calc((100vw - 1420px) / 2));
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) minmax(280px, 410px);
  gap: clamp(30px, 5vw, 80px);
  align-items: end;
  background: var(--white);
}
.manifesto h2 { margin: 0; font-size: clamp(48px, 6vw, 100px); font-weight: 350; line-height: 0.98; letter-spacing: -0.055em; }
.manifesto > p:last-child { margin: 0 0 5px; color: var(--steel); font-size: 20px; line-height: 1.55; }

.section-shell { width: var(--shell); margin: 0 auto; }

.instrument { padding: clamp(80px, 10vw, 160px) 0; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.72fr); gap: clamp(56px, 8vw, 130px); align-items: center; }
.instrument-stage { min-width: 0; }
.instrument-image-wrap { min-height: 600px; display: grid; place-items: center; position: relative; background-color: var(--paper-deep); background-image: linear-gradient(rgba(8,18,23,0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(8,18,23,0.06) 1px, transparent 1px); background-size: 60px 60px; overflow: hidden; }
.instrument-image-wrap::after { content: ""; width: 62%; aspect-ratio: 1; position: absolute; border: 1px solid rgba(47,93,171,0.3); border-radius: 50%; }
.instrument-image-wrap img { width: min(82%, 700px); position: relative; z-index: 2; mix-blend-mode: multiply; }
.callout { position: absolute; z-index: 3; padding: 6px 9px; background: var(--ink); color: var(--lume); font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: 0.08em; }
.callout::after { content: ""; position: absolute; height: 1px; background: var(--ink); }
.callout-optics { top: 22%; left: 5%; }.callout-optics::after { width: 88px; top: 50%; left: 100%; }
.callout-control { top: 13%; right: 4%; }.callout-control::after { width: 70px; top: 50%; right: 100%; }
.callout-power { right: 5%; bottom: 18%; }.callout-power::after { width: 100px; top: 50%; right: 100%; }
.instrument-caption { padding: 14px 0; display: flex; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line-light); color: var(--steel); }
.instrument-caption p { margin: 0; font-family: inherit; font-size: 13px; font-weight: 500; letter-spacing: 0; text-transform: none; }
.instrument-copy h2, .habit h2, .technical h2, .configuration-record h2, .product-optics h2 { margin: 0; font-size: clamp(44px, 4.6vw, 76px); line-height: 0.98; letter-spacing: -0.05em; font-weight: 430; }
.spec-stack { margin: 42px 0; }
.spec-stack article { padding: 22px 0; display: grid; grid-template-columns: 42px 1fr; gap: 14px; border-top: 1px solid var(--line-light); }
.spec-stack article:last-child { border-bottom: 1px solid var(--line-light); }
.spec-stack article > span { color: var(--brand-blue); font-family: ui-monospace, monospace; font-size: 11px; }
.spec-stack h3 { margin: 0 0 7px; font-size: 21px; font-weight: 650; }
.spec-stack p { margin: 0; color: var(--steel); }
.text-link { display: inline-flex; gap: 14px; align-items: center; color: var(--ink); text-decoration: none; font-weight: 720; border-bottom: 1px solid currentColor; }
.text-link.on-dark { color: var(--lume); }

.glance-section { min-height: 760px; display: grid; grid-template-columns: minmax(360px, 0.72fr) minmax(0, 1.28fr); background: var(--ink); color: var(--white); }
.glance-copy { padding: clamp(72px, 8vw, 130px) clamp(42px, 7vw, 110px); align-self: center; }
.glance-copy h2 { margin: 0 0 30px; font-size: clamp(50px, 5.7vw, 92px); line-height: 0.92; letter-spacing: -0.055em; font-weight: 340; }
.glance-copy > p:not(.section-index) { max-width: 560px; color: rgba(255,255,255,0.68); font-size: 19px; }
.data-list { margin-top: 48px; display: flex; flex-wrap: wrap; gap: 9px; }
.data-list span { padding: 8px 10px; border: 1px solid rgba(255,255,255,0.25); font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: 0.08em; }
.data-list .optional { border-color: var(--lume); color: var(--lume); }
.optic-window { min-width: 0; position: relative; display: grid; place-items: center; overflow: hidden; background: radial-gradient(circle at center, #183849 0, #0b1b22 50%, #03090c 100%); }
.optic-window::before, .optic-window::after { content: ""; position: absolute; z-index: 2; border: 1px solid rgba(94,229,210,0.28); pointer-events: none; }
.optic-window::before { inset: 7%; }
.optic-window::after { width: 50%; aspect-ratio: 1; border-radius: 50%; }
.optic-window video { width: min(76%, 900px); position: relative; z-index: 1; filter: saturate(1.12) contrast(1.05); }
.optic-glow { position: absolute; width: 30vw; height: 30vw; border-radius: 50%; background: rgba(94,229,210,0.08); filter: blur(30px); }
.optic-meta { position: absolute; z-index: 3; right: 7%; bottom: 7%; left: 7%; display: flex; justify-content: space-between; color: rgba(255,255,255,0.48); }

.habit { padding: clamp(90px, 10vw, 160px) 0; }
.habit-intro { max-width: 1000px; display: grid; grid-template-columns: 140px minmax(0,1fr); column-gap: 42px; }
.habit-intro .section-index { grid-row: 1 / span 2; }
.habit-intro > p:last-child { max-width: 680px; margin: 28px 0 0; color: var(--steel); font-size: 19px; }
.habit-visual { margin-top: 78px; display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(330px, 0.55fr); background: var(--white); }
.habit-visual > img { width: 100%; height: 100%; min-height: 560px; object-fit: contain; mix-blend-mode: multiply; }
.mount-path { padding: 50px; display: flex; flex-direction: column; justify-content: center; background: var(--ink); color: var(--white); }
.mount-path > div { padding: 26px 0; display: grid; grid-template-columns: 42px 1fr; border-top: 1px solid var(--line-dark); }
.mount-path > div:last-child { border-bottom: 1px solid var(--line-dark); }
.mount-path span { grid-row: 1 / span 2; color: var(--lume); font-family: ui-monospace, monospace; font-size: 11px; }
.mount-path strong { font-size: 23px; }
.mount-path p { margin: 4px 0 0; color: rgba(255,255,255,0.58); }

.field-section { display: grid; grid-template-columns: minmax(0, 1.32fr) minmax(380px, 0.68fr); background: var(--ink-soft); color: var(--white); }
.field-image { margin: 0; min-height: 700px; position: relative; overflow: hidden; }
.field-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 70%, rgba(16,33,39,0.5)); }
.field-image img { width: 100%; height: 100%; object-fit: cover; object-position: center; filter: saturate(0.75) contrast(1.1); }
.field-image figcaption { position: absolute; z-index: 2; bottom: 20px; left: 24px; padding: 8px 10px; background: rgba(8,18,23,0.72); color: rgba(255,255,255,0.65); }
.field-copy { padding: clamp(70px, 8vw, 130px) clamp(40px, 6vw, 95px); align-self: center; }
.field-copy h2 { margin: 0 0 28px; font-size: clamp(44px, 4.5vw, 72px); line-height: 0.96; letter-spacing: -0.05em; font-weight: 390; }
.field-copy > p:not(.section-index) { color: rgba(255,255,255,0.66); font-size: 18px; }
.evidence-notice { margin: 38px 0; padding: 20px 22px; border-left: 2px solid var(--signal); background: rgba(255,255,255,0.05); }
.evidence-notice strong { color: var(--signal); }
.evidence-notice p { margin: 6px 0 0; color: rgba(255,255,255,0.6); font-size: 14px; }

.team-awareness { padding: clamp(90px, 11vw, 170px) 0; display: grid; grid-template-columns: minmax(360px, 0.8fr) minmax(0, 1.2fr); gap: clamp(60px, 10vw, 160px); align-items: center; }
.team-copy h2 { margin: 0 0 28px; font-size: clamp(48px, 5.3vw, 88px); line-height: 0.96; letter-spacing: -0.055em; font-weight: 360; }
.team-copy > p:not(.section-index) { color: var(--steel); font-size: 19px; }
.system-list { margin: 44px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line-light); }
.system-list li { padding: 18px 0; display: grid; grid-template-columns: 142px 1fr; gap: 20px; border-bottom: 1px solid var(--line-light); }
.system-list span { color: var(--brand-blue); font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: 0.08em; }
.system-list strong { font-weight: 620; }
.team-image { margin: 0; position: relative; }
.team-image img { width: 100%; max-height: 820px; object-fit: cover; filter: saturate(0.8); }
.team-image figcaption { position: absolute; right: -26px; bottom: 24px; padding: 14px 18px; background: var(--lume); color: var(--ink); font-size: 16px; font-weight: 750; writing-mode: vertical-rl; transform: rotate(180deg); }

.buy-path { padding: clamp(80px, 9vw, 140px) max(36px, calc((100vw - 1420px) / 2)); background: var(--lume); }
.buy-path-head { display: grid; grid-template-columns: 180px 1fr; gap: 40px; }
.buy-path .section-index { color: var(--ink); opacity: 0.7; }
.buy-path h2 { max-width: 1000px; margin: 0; font-size: clamp(50px, 6.5vw, 102px); line-height: 0.93; letter-spacing: -0.06em; font-weight: 390; }
.buy-path ol { margin: 70px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); list-style: none; border-top: 1px solid rgba(8,18,23,0.3); border-bottom: 1px solid rgba(8,18,23,0.3); }
.buy-path li { min-height: 210px; padding: 26px; display: grid; grid-template-columns: 42px 1fr; border-right: 1px solid rgba(8,18,23,0.3); }
.buy-path li:last-child { border-right: 0; }
.buy-path li > span { font-family: ui-monospace, monospace; font-size: 11px; }
.buy-path li strong { font-size: 22px; }
.buy-path li p { margin: 12px 0 0; color: rgba(8,18,23,0.68); }
.buy-path-action { margin-top: 32px; display: flex; justify-content: space-between; align-items: center; gap: 28px; }
.buy-path-action p { margin: 0; max-width: 620px; color: rgba(8,18,23,0.68); }

.support-band { display: grid; grid-template-columns: repeat(3, 1fr); background: var(--paper-deep); }
.support-band > div { min-height: 170px; padding: 38px max(36px, 4vw); display: flex; flex-direction: column; justify-content: space-between; border-right: 1px solid var(--line-light); }
.support-band > div:last-child { border-right: 0; }
.support-band span { color: var(--brand-blue); font-family: ui-monospace, monospace; font-size: 10px; font-weight: 700; letter-spacing: 0.12em; }
.support-band strong { max-width: 340px; font-size: 18px; line-height: 1.35; }

.site-footer { padding: 70px max(36px, calc((100vw - 1420px) / 2)); display: grid; grid-template-columns: 1fr auto 1fr; gap: 70px; align-items: start; background: #02090c; color: var(--white); }
.footer-brand img { width: 130px; }
.footer-brand p { margin: 18px 0 0; color: rgba(255,255,255,0.48); }
.site-footer nav { display: grid; grid-template-columns: repeat(2, minmax(100px, 1fr)); gap: 12px 36px; }
.site-footer nav a { color: rgba(255,255,255,0.72); text-decoration: none; }
.site-footer nav a:hover { color: var(--lume); }
.footer-demo { justify-self: end; max-width: 350px; color: rgba(255,255,255,0.5); font-size: 13px; }
.footer-demo strong { color: var(--lume); font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: 0.1em; }
.footer-demo p { margin: 10px 0 0; }

/* Product page */
.product-buy { min-height: calc(100svh - 112px); display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(420px, 0.75fr); background: var(--paper); }
.product-media { min-width: 0; padding: clamp(35px, 5vw, 80px); display: grid; grid-template-columns: 78px minmax(0,1fr); gap: 22px; align-items: center; }
.media-rail { display: grid; gap: 10px; }
.media-rail button { width: 78px; aspect-ratio: 1; padding: 4px; border: 1px solid transparent; background: var(--white); cursor: pointer; overflow: hidden; }
.media-rail button.is-active { border-color: var(--ink); }
.media-rail img { width: 100%; height: 100%; object-fit: cover; mix-blend-mode: multiply; }
.media-rail .video-thumb { background: var(--ink); color: var(--lume); }
.video-thumb span { font-family: ui-monospace, monospace; font-size: 14px; }
.media-stage { margin: 0; min-height: min(68vw, 720px); position: relative; display: grid; place-items: center; background-color: var(--paper-deep); background-image: radial-gradient(circle at center, rgba(255,255,255,0.9), rgba(223,232,228,0.3)); overflow: hidden; }
.media-stage > img { width: min(84%, 850px); mix-blend-mode: multiply; }
.media-stage figcaption { position: absolute; right: 18px; bottom: 15px; left: 18px; display: flex; justify-content: space-between; color: var(--steel); font-family: ui-monospace, monospace; font-size: 9px; letter-spacing: 0.1em; }
.spin-stage { width: 100%; height: 100%; min-height: inherit; position: relative; display: grid; place-items: center; outline-offset: -4px; cursor: ew-resize; }
.spin-stage video { width: min(90%, 900px); max-height: 670px; object-fit: contain; mix-blend-mode: multiply; }
.spin-stage > p { position: absolute; bottom: 42px; left: 50%; margin: 0; padding: 8px 12px; background: var(--ink); color: var(--white); transform: translateX(-50%); font-size: 12px; }
.spin-stage > p span { color: var(--lume); }

.purchase-panel { padding: clamp(58px, 6vw, 96px) clamp(38px, 5vw, 76px); background: var(--ink); color: var(--white); }
.purchase-panel h1 { margin: 0; font-size: clamp(56px, 5.4vw, 88px); line-height: 0.95; letter-spacing: -0.06em; font-weight: 470; }
.product-deck { margin: 24px 0 28px; color: rgba(255,255,255,0.67); font-size: 18px; }
.price-pending { padding: 18px 0 22px; display: flex; justify-content: space-between; align-items: baseline; gap: 20px; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.price-pending span { color: var(--mist); }
.price-pending strong { color: var(--lume); font-size: 21px; font-weight: 650; }
.configure-form { margin-top: 34px; }
.configure-form fieldset { margin: 0 0 30px; padding: 0; border: 0; }
.configure-form legend, .field-group > label { margin-bottom: 12px; display: block; font-size: 14px; font-weight: 650; }
.configure-form legend strong { margin-left: 8px; color: var(--lume); }
.finish-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.finish-options label { min-width: 0; position: relative; cursor: pointer; }
.finish-options input { position: absolute; opacity: 0; }
.finish-options label > span { width: 100%; height: 52px; display: block; border: 1px solid rgba(255,255,255,0.22); }
.finish-options input:checked + span { outline: 2px solid var(--lume); outline-offset: 2px; }
.finish-swatch.swatch-deep { background: linear-gradient(135deg, #212431, #090d18); }
.finish-swatch.swatch-blue { background: linear-gradient(135deg, #365fab, #19366d); }
.finish-options em { margin-top: 9px; display: block; color: rgba(255,255,255,0.64); font-size: 13px; font-style: normal; }
.field-group { margin-bottom: 24px; }
.field-group input, .checkout-form input, .checkout-form select { width: 100%; min-height: 52px; padding: 0 15px; border: 1px solid rgba(255,255,255,0.28); border-radius: 0; background: rgba(255,255,255,0.05); color: var(--white); outline: none; }
.field-group input:focus, .checkout-form input:focus, .checkout-form select:focus { border-color: var(--lume); box-shadow: 0 0 0 2px rgba(94,229,210,0.13); }
.field-group input::placeholder { color: rgba(255,255,255,0.4); }
.field-group small { margin-top: 8px; display: block; color: rgba(255,255,255,0.46); font-size: 12px; }
.addon-card { padding: 18px; display: grid; grid-template-columns: 0 24px 1fr; gap: 12px; border: 1px solid rgba(255,255,255,0.24); cursor: pointer; }
.addon-card > input { opacity: 0; width: 0; }
.checkbox-ui { width: 22px; height: 22px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,0.45); }
.addon-card input:checked + .checkbox-ui { background: var(--lume); border-color: var(--lume); }
.addon-card input:checked + .checkbox-ui::after { content: "✓"; color: var(--ink); font-weight: 800; }
.addon-card input:focus-visible + .checkbox-ui { outline: 2px solid var(--lume); outline-offset: 3px; }
.addon-card strong { display: block; }
.addon-card small { margin-top: 3px; display: block; color: rgba(255,255,255,0.48); }
.purchase-action { margin-top: 18px; display: grid; grid-template-columns: 124px 1fr; gap: 10px; }
.quantity-control { height: 54px; display: grid; grid-template-columns: 36px 1fr 36px; border: 1px solid rgba(255,255,255,0.28); }
.quantity-control button { border: 0; background: transparent; color: var(--white); cursor: pointer; }
.quantity-control input { min-width: 0; border: 0; background: transparent; color: var(--white); text-align: center; -moz-appearance: textfield; }
.quantity-control input::-webkit-inner-spin-button { -webkit-appearance: none; }
.add-button { width: 100%; border: 0; }
.form-status { min-height: 22px; margin: 10px 0 0; color: var(--lume); font-size: 13px; }
.purchase-caveat { margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--line-dark); }
.purchase-caveat span { color: var(--signal); }
.purchase-caveat p { margin: 8px 0 0; color: rgba(255,255,255,0.48); font-size: 13px; }

.product-keyline { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--lume); }
.product-keyline > div { min-height: 120px; padding: 24px 30px; display: flex; flex-direction: column; justify-content: space-between; border-right: 1px solid rgba(8,18,23,0.26); }
.product-keyline > div:last-child { border-right: 0; }
.product-keyline span { color: rgba(8,18,23,0.55); }
.product-keyline strong { font-size: 17px; }

.product-optics { padding: clamp(90px, 10vw, 160px) 0; display: grid; grid-template-columns: minmax(360px, 0.82fr) minmax(0, 1.18fr); gap: clamp(60px, 9vw, 145px); align-items: center; }
.optics-copy > p:not(.section-index) { margin: 30px 0; color: var(--steel); font-size: 19px; }
.optics-facts { margin: 0; }
.optics-facts > div { padding: 17px 0; display: grid; grid-template-columns: 150px 1fr; gap: 18px; border-top: 1px solid var(--line-light); }
.optics-facts > div:last-child { border-bottom: 1px solid var(--line-light); }
.optics-facts dt { color: var(--brand-blue); font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: 0.08em; }
.optics-facts dd { margin: 0; }
.product-optic-window { min-height: 560px; }
.optics-view > p { margin: 12px 0 0; color: var(--steel); font-size: 12px; text-align: right; }

.product-use { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(420px, 0.7fr); background: var(--ink); color: var(--white); }
.product-use figure { margin: 0; min-height: 650px; overflow: hidden; }
.product-use figure img { width: 100%; height: 100%; object-fit: cover; object-position: 58% center; filter: saturate(0.75) contrast(1.06); }
.product-use > div { padding: clamp(70px, 8vw, 130px) clamp(40px, 6vw, 95px); align-self: center; }
.product-use h2 { margin: 0 0 28px; font-size: clamp(44px, 4.8vw, 78px); line-height: 0.96; letter-spacing: -0.05em; font-weight: 380; }
.product-use > div > p:not(.section-index) { color: rgba(255,255,255,0.66); font-size: 18px; }
.use-steps { margin: 38px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line-dark); }
.use-steps li { padding: 16px 0; border-bottom: 1px solid var(--line-dark); }
.use-steps span { width: 44px; display: inline-block; color: var(--lume); font-family: ui-monospace, monospace; font-size: 11px; }

.technical { padding: clamp(90px, 10vw, 160px) 0; }
.technical-head { max-width: 1030px; display: grid; grid-template-columns: 140px 1fr; gap: 30px 50px; }
.technical-head .section-index { grid-row: 1 / span 2; }
.technical-head p:last-child { max-width: 680px; margin: 0; color: var(--steel); font-size: 18px; }
.technical-table { margin: 70px 0 0; border-top: 2px solid var(--ink); }
.technical-table > div { min-height: 76px; padding: 20px 0; display: grid; grid-template-columns: minmax(240px, 0.7fr) minmax(0, 1.3fr); gap: 40px; align-items: center; border-bottom: 1px solid var(--line-light); }
.technical-table dt { color: var(--steel); }
.technical-table dd { margin: 0; font-size: 19px; font-weight: 600; }

.configuration-record { padding: 0 0 clamp(100px, 11vw, 170px); }
.configuration-record > div:first-child { display: grid; grid-template-columns: 180px 1fr; gap: 40px; }
.record-grid { margin-top: 60px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.record-grid article { min-height: 260px; padding: 28px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.record-grid article > span { color: var(--brand-blue); font-family: ui-monospace, monospace; font-size: 11px; }
.record-grid h3 { margin: 70px 0 12px; font-size: 23px; }
.record-grid p { margin: 0; color: var(--steel); }
.record-grid .record-warning { background: var(--paper-deep); }
.record-grid .record-warning > span { color: #b04628; }

.limitations { padding: clamp(90px, 10vw, 160px) max(36px, calc((100vw - 1420px) / 2)); background: var(--ink-soft); color: var(--white); }
.limitations-head { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 42px; }
.limitations h2 { max-width: 1050px; margin: 0; font-size: clamp(52px, 6vw, 96px); line-height: 0.93; letter-spacing: -0.055em; font-weight: 340; }
.limitations-grid { margin-top: 70px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); }
.limitations-grid article { min-height: 260px; padding: 26px; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.limitations-grid span { color: var(--lume); font-family: ui-monospace, monospace; }
.limitations-grid h3 { margin: 64px 0 12px; font-size: 21px; }
.limitations-grid p { margin: 0; color: rgba(255,255,255,0.58); }

.product-final { padding: clamp(90px, 10vw, 150px) max(36px, calc((100vw - 1420px) / 2)); text-align: center; background: var(--lume); }
.product-final .section-index { color: var(--ink); }
.product-final h2 { margin: 0 0 42px; font-size: clamp(56px, 7vw, 114px); line-height: 0.9; letter-spacing: -0.065em; font-weight: 360; }
.mobile-purchase-bar { display: none; }

/* Cart */
.cart-backdrop { position: fixed; z-index: 80; inset: 0; background: rgba(2,9,12,0.68); backdrop-filter: blur(3px); }
.cart-drawer { position: fixed; z-index: 90; top: 0; right: 0; bottom: 0; width: min(480px, 100vw); padding: 30px; display: flex; flex-direction: column; background: var(--white); color: var(--ink); box-shadow: -20px 0 70px rgba(0,0,0,0.28); transform: translateX(100%); transition: transform 360ms var(--ease); }
.cart-drawer.is-open { transform: translateX(0); }
.cart-drawer-head { padding-bottom: 24px; display: flex; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line-light); }
.cart-drawer-head span { color: var(--brand-blue); font-family: ui-monospace, monospace; font-size: 10px; font-weight: 700; letter-spacing: 0.1em; }
.cart-drawer-head h2 { margin: 5px 0 0; font-size: 34px; letter-spacing: -0.04em; font-weight: 520; }
.cart-drawer-head button { width: 42px; height: 42px; border: 1px solid var(--line-light); background: transparent; font-size: 27px; cursor: pointer; }
.cart-empty { margin: auto 0; text-align: center; }
.cart-empty p { color: var(--steel); font-size: 20px; }
.cart-item { padding: 26px 0; display: grid; grid-template-columns: 120px 1fr; gap: 20px; border-bottom: 1px solid var(--line-light); }
.cart-item img { width: 120px; height: 100px; object-fit: contain; background: var(--paper-deep); mix-blend-mode: multiply; }
.cart-item strong { font-size: 20px; }
.cart-item p { margin: 5px 0 12px; color: var(--steel); font-size: 14px; }
.cart-stepper { width: 106px; height: 34px; display: grid; grid-template-columns: repeat(3, 1fr); align-items: center; border: 1px solid var(--line-light); text-align: center; }
.cart-stepper button { height: 100%; border: 0; background: transparent; cursor: pointer; }
.cart-total { margin-top: auto; padding-top: 24px; display: flex; justify-content: space-between; font-size: 18px; }
.cart-disclaimer { margin: 10px 0 22px; color: var(--steel); font-size: 13px; }
.cart-checkout { width: 100%; }

/* Checkout */
.checkout-page { min-height: 100vh; background: var(--paper); }
.checkout-prototype-bar { justify-content: flex-start; padding-left: max(36px, calc((100vw - 1320px) / 2)); }
.checkout-header { height: 82px; padding: 0 max(36px, calc((100vw - 1320px) / 2)); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; background: var(--ink); color: var(--white); }
.checkout-header .brand { justify-self: start; }
.checkout-return { justify-self: center; color: rgba(255,255,255,0.72); text-decoration: none; }
.secure-label { justify-self: end; color: rgba(255,255,255,0.55); font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; }
.checkout-shell { width: min(1320px, calc(100vw - 72px)); margin: 0 auto; padding: 74px 0 110px; display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(360px, 0.62fr); gap: 90px; align-items: start; }
.checkout-intro h1 { margin: 0; font-size: clamp(52px, 5.5vw, 86px); line-height: 0.94; letter-spacing: -0.055em; font-weight: 410; }
.checkout-intro > p:last-child { max-width: 640px; color: var(--steel); font-size: 18px; }
.checkout-progress { margin: 50px 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); list-style: none; border-top: 1px solid var(--line-light); }
.checkout-progress li { padding-top: 14px; display: flex; gap: 14px; color: var(--steel); font-size: 14px; }
.checkout-progress li span { font-family: ui-monospace, monospace; font-size: 10px; }
.checkout-progress li.is-current { border-top: 2px solid var(--brand-blue); color: var(--ink); }
.checkout-form fieldset { margin: 0 0 34px; padding: 0 0 34px; border: 0; border-bottom: 1px solid var(--line-light); }
.checkout-form legend { margin-bottom: 20px; font-size: 24px; font-weight: 630; }
.checkout-form legend span { width: 42px; display: inline-block; color: var(--brand-blue); font-family: ui-monospace, monospace; font-size: 11px; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.form-grid label { color: var(--steel); font-size: 13px; font-weight: 620; }
.form-grid .wide { grid-column: 1 / -1; }
.checkout-form input, .checkout-form select { margin-top: 7px; border-color: var(--line-light); background: var(--white); color: var(--ink); }
.checkout-form select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: calc(100% - 19px) 22px, calc(100% - 14px) 22px; background-size: 5px 5px; background-repeat: no-repeat; }
.check-line { margin-top: 16px; display: grid; grid-template-columns: 20px 1fr; gap: 11px; align-items: start; color: var(--steel); font-size: 14px; cursor: pointer; }
.check-line input { width: 18px; min-height: 18px; margin: 2px 0 0; accent-color: var(--brand-blue); }
.field-note { margin: 14px 0 0; color: var(--steel); font-size: 13px; }
.payment-lock { padding: 24px; display: grid; grid-template-columns: 36px 1fr; gap: 14px; background: var(--paper-deep); }
.payment-lock > span { width: 32px; height: 32px; display: grid; place-items: center; border: 1px solid var(--line-light); }
.payment-lock strong { display: block; }
.payment-lock p { margin: 5px 0 0; color: var(--steel); font-size: 14px; }
.agreement { padding: 16px; border: 1px solid var(--line-light); }
.checkout-submit { width: 100%; margin-top: 20px; border: 0; }
.checkout-form .form-status { color: #9f321e; }
.order-review { position: sticky; top: 30px; padding: 30px; background: var(--white); border: 1px solid var(--line-light); }
.order-review-head { display: flex; justify-content: space-between; color: var(--brand-blue); }
.order-review-head a { color: var(--ink); font-family: inherit; font-size: 12px; letter-spacing: 0; text-transform: none; }
.order-review h2 { margin: 14px 0 28px; font-size: 38px; letter-spacing: -0.045em; font-weight: 500; }
.checkout-empty { padding: 30px 0; text-align: center; }
.order-product { padding: 20px 0; display: grid; grid-template-columns: 120px 1fr; gap: 18px; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.order-product img { width: 120px; height: 100px; object-fit: contain; background: var(--paper-deep); mix-blend-mode: multiply; }
.order-product strong { font-size: 19px; }
.order-product p { margin: 4px 0 10px; color: var(--steel); font-size: 14px; }
.order-product span { color: var(--steel); font-size: 13px; }
.order-lines { margin: 20px 0; }
.order-lines > div { padding: 8px 0; display: flex; justify-content: space-between; gap: 22px; }
.order-lines dt { color: var(--steel); }
.order-lines dd { margin: 0; text-align: right; }
.order-lines .order-total-line { margin-top: 10px; padding-top: 18px; border-top: 1px solid var(--line-light); font-size: 20px; font-weight: 650; }
.order-notice { padding: 15px; border-left: 2px solid #be4a2d; background: #f6e8e2; }
.order-notice p { margin: 3px 0 0; color: var(--steel); font-size: 13px; }
.demo-confirmation { grid-column: 1 / -1; max-width: 860px; margin: 50px auto; text-align: center; }
.confirmation-mark { width: 72px; height: 72px; margin: 0 auto 32px; display: grid; place-items: center; border: 1px solid var(--brand-blue); border-radius: 50%; color: var(--brand-blue); font-size: 32px; }
.demo-confirmation h1 { margin: 0; font-size: clamp(48px, 6vw, 88px); line-height: 0.96; letter-spacing: -0.055em; font-weight: 400; }
.demo-confirmation > p:not(.section-index) { max-width: 700px; margin: 28px auto; color: var(--steel); font-size: 18px; }
.confirmation-actions { display: flex; justify-content: center; gap: 12px; }
.demo-confirmation .button-ghost { border-color: var(--line-light); color: var(--ink); }
.checkout-footer { padding: 24px max(36px, calc((100vw - 1320px) / 2)); display: flex; justify-content: space-between; gap: 20px; background: var(--ink); color: rgba(255,255,255,0.48); }
.checkout-footer p { margin: 0; font-family: inherit; font-size: 12px; letter-spacing: 0; text-transform: none; }

[data-reveal] { opacity: 1; transform: none; transition: opacity 700ms var(--ease), transform 700ms var(--ease); }

:focus-visible { outline: 2px solid var(--lume-deep); outline-offset: 4px; }

@media (max-width: 1160px) {
  :root { --shell: min(100% - 48px, 1100px); }
  .site-header { grid-template-columns: 135px 1fr auto; padding: 0 24px; }
  .desktop-nav { gap: 22px; }
  .hero { grid-template-columns: minmax(360px, 48%) 1fr; }
  .hero-copy { padding-right: 44px; padding-left: 44px; }
  .viewfinder { width: 310px; height: 235px; right: 30px; }
  .sample-readout > strong { font-size: 58px; }
  .manifesto { grid-template-columns: 120px 1fr; }
  .manifesto > p:last-child { grid-column: 2; max-width: 650px; }
  .instrument { grid-template-columns: 1fr 0.8fr; gap: 60px; }
  .instrument-image-wrap { min-height: 500px; }
  .glance-section { grid-template-columns: 0.85fr 1.15fr; }
  .habit-visual { grid-template-columns: 1.1fr 0.9fr; }
  .field-section { grid-template-columns: 1.1fr 0.9fr; }
  .team-awareness { gap: 65px; }
  .site-footer { gap: 40px; }
  .product-buy { grid-template-columns: minmax(0, 1.15fr) minmax(400px, 0.85fr); }
  .product-media { padding: 35px 28px; grid-template-columns: 65px 1fr; gap: 14px; }
  .media-rail button { width: 65px; }
  .purchase-panel { padding: 64px 38px; }
  .product-optics { gap: 70px; }
  .product-use { grid-template-columns: 1.05fr 0.95fr; }
  .record-grid, .limitations-grid { grid-template-columns: repeat(2, 1fr); }
  .checkout-shell { gap: 50px; }
}

@media (max-width: 900px) {
  :root { --header-height: 68px; --shell: calc(100% - 40px); }
  .prototype-bar { padding-right: 20px; padding-left: 20px; }
  .site-header { height: var(--header-height); grid-template-columns: 1fr auto; }
  .desktop-nav, .site-header .header-actions { display: none; }
  .menu-toggle { display: block; justify-self: end; }
  .hero { min-height: auto; grid-template-columns: 1fr; }
  .hero-copy { min-height: 610px; padding: 90px 50px 70px; }
  .hero-visual { min-height: 620px; }
  .hero-visual > img { object-position: 58% center; }
  .depth-scale { top: auto; height: 70%; bottom: 30px; }
  .manifesto { padding: 100px 30px; grid-template-columns: 1fr; gap: 22px; }
  .manifesto > p:last-child { grid-column: auto; }
  .instrument { grid-template-columns: 1fr; }
  .instrument-stage { order: 2; }
  .instrument-copy { order: 1; }
  .instrument-image-wrap { min-height: 570px; }
  .glance-section { grid-template-columns: 1fr; }
  .glance-copy { min-height: 600px; }
  .optic-window { min-height: 620px; }
  .habit-intro { grid-template-columns: 1fr; }
  .habit-intro .section-index { grid-row: auto; }
  .habit-visual { grid-template-columns: 1fr; }
  .habit-visual > img { min-height: 480px; }
  .field-section { grid-template-columns: 1fr; }
  .field-image { min-height: 580px; }
  .team-awareness { grid-template-columns: 1fr; }
  .team-image { width: min(78%, 640px); margin-left: auto; }
  .team-image figcaption { right: 0; }
  .buy-path-head { grid-template-columns: 1fr; gap: 14px; }
  .buy-path ol { grid-template-columns: 1fr; }
  .buy-path li { min-height: auto; border-right: 0; border-bottom: 1px solid rgba(8,18,23,0.3); }
  .buy-path li:last-child { border-bottom: 0; }
  .support-band { grid-template-columns: 1fr; }
  .support-band > div { border-right: 0; border-bottom: 1px solid var(--line-light); }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .footer-demo { grid-column: 1 / -1; justify-self: start; }
  .product-buy { grid-template-columns: 1fr; }
  .product-media { min-height: 680px; }
  .media-stage { min-height: 610px; }
  .purchase-panel { padding-right: max(30px, calc((100vw - 720px) / 2)); padding-left: max(30px, calc((100vw - 720px) / 2)); }
  .product-optics { grid-template-columns: 1fr; }
  .product-use { grid-template-columns: 1fr; }
  .product-use figure { min-height: 550px; }
  .technical-head { grid-template-columns: 1fr; }
  .technical-head .section-index { grid-row: auto; }
  .configuration-record > div:first-child, .limitations-head { grid-template-columns: 1fr; gap: 12px; }
  .product-keyline { grid-template-columns: repeat(2, 1fr); }
  .product-keyline > div:nth-child(2) { border-right: 0; }
  .product-keyline > div:nth-child(-n+2) { border-bottom: 1px solid rgba(8,18,23,0.26); }
  .checkout-header { grid-template-columns: 1fr auto; padding: 0 24px; }
  .checkout-return { justify-self: end; }
  .secure-label { display: none; }
  .checkout-shell { width: min(720px, calc(100vw - 40px)); grid-template-columns: 1fr; padding-top: 50px; }
  .order-review { position: static; grid-row: 1; }
  .checkout-main { grid-row: 2; }
  .demo-confirmation { grid-row: 1; }
}

@media (max-width: 640px) {
  .prototype-bar { min-height: 48px; align-items: flex-start; gap: 6px; flex-direction: column; }
  .prototype-bar p { font-size: 12px; }
  .site-header { padding: 0 18px; }
  .brand { width: 100px; }
  .hero-copy { min-height: 580px; padding: 72px 24px 60px; }
  .hero-copy::before { right: 20px; }
  .coordinate-label { flex-direction: column; gap: 4px; }
  .hero h1 { margin-top: 28px; font-size: clamp(54px, 17vw, 76px); }
  .hero-lead { font-size: 18px; }
  .hero-actions { display: grid; }
  .hero-actions .button { width: 100%; }
  .purchase-status { margin-top: 34px; }
  .hero-visual { min-height: 520px; }
  .viewfinder { right: 22px; bottom: 42px; left: 22px; width: auto; height: 222px; padding: 27px; }
  .sample-readout > strong { font-size: 52px; }
  .depth-scale { display: none; }
  .manifesto { padding: 78px 22px; }
  .manifesto h2 { font-size: 48px; }
  .manifesto > p:last-child { font-size: 17px; }
  .instrument { padding: 75px 0; gap: 50px; }
  .instrument-copy h2, .habit h2, .technical h2, .configuration-record h2, .product-optics h2 { font-size: 44px; }
  .instrument-image-wrap { min-height: 400px; background-size: 38px 38px; }
  .instrument-caption { display: block; }
  .instrument-caption p { margin-top: 5px; }
  .callout { font-size: 8px; }
  .callout-optics::after, .callout-control::after, .callout-power::after { width: 34px; }
  .glance-copy { min-height: auto; padding: 76px 24px; }
  .glance-copy h2 { font-size: 48px; }
  .optic-window { min-height: 440px; }
  .optic-window video { width: 92%; }
  .optic-meta { align-items: flex-end; flex-direction: column; gap: 5px; }
  .habit { padding: 78px 0; }
  .habit-intro > p:last-child { font-size: 17px; }
  .habit-visual { margin-top: 46px; }
  .habit-visual > img { min-height: 330px; }
  .mount-path { padding: 28px 24px; }
  .field-image { min-height: 440px; }
  .field-copy { padding: 72px 24px; }
  .field-copy h2 { font-size: 46px; }
  .team-awareness { padding: 78px 0; gap: 46px; }
  .team-copy h2 { font-size: 48px; }
  .system-list li { grid-template-columns: 110px 1fr; }
  .team-image { width: calc(100% - 20px); margin-left: 0; }
  .team-image figcaption { right: -20px; }
  .buy-path { padding: 76px 22px; }
  .buy-path h2 { font-size: 50px; }
  .buy-path ol { margin-top: 46px; }
  .buy-path-action { align-items: stretch; flex-direction: column; }
  .buy-path-action .button { width: 100%; }
  .support-band > div { min-height: 145px; padding: 30px 24px; }
  .site-footer { padding: 56px 24px; grid-template-columns: 1fr; }
  .footer-demo { grid-column: auto; }
  .site-footer nav { grid-template-columns: 1fr 1fr; }
  .cart-drawer { padding: 24px 20px; }
  .product-media { min-height: auto; padding: 20px; display: flex; flex-direction: column-reverse; }
  .media-rail { width: 100%; grid-template-columns: repeat(4, 1fr); }
  .media-rail button { width: 100%; }
  .media-stage { width: 100%; min-height: 420px; }
  .spin-stage { min-height: 420px; }
  .purchase-panel { padding: 65px 24px 80px; }
  .purchase-panel h1 { font-size: 58px; }
  .price-pending { align-items: flex-start; flex-direction: column; gap: 4px; }
  .finish-options { grid-template-columns: 1fr 1fr; }
  .purchase-action { grid-template-columns: 112px 1fr; }
  .product-keyline { grid-template-columns: 1fr; }
  .product-keyline > div { min-height: 100px; border-right: 0; border-bottom: 1px solid rgba(8,18,23,0.26); }
  .product-optics { padding: 78px 0; }
  .product-optic-window { min-height: 420px; }
  .optics-facts > div { grid-template-columns: 120px 1fr; }
  .product-use figure { min-height: 420px; }
  .product-use > div { padding: 72px 24px; }
  .technical { padding: 78px 0; }
  .technical-table { margin-top: 45px; }
  .technical-table > div { grid-template-columns: 1fr; gap: 5px; }
  .technical-table dd { font-size: 17px; }
  .record-grid, .limitations-grid { grid-template-columns: 1fr; }
  .configuration-record { padding-bottom: 80px; }
  .configuration-record > div:first-child { gap: 0; }
  .record-grid article, .limitations-grid article { min-height: 210px; }
  .record-grid h3, .limitations-grid h3 { margin-top: 44px; }
  .limitations { padding: 76px 22px; }
  .limitations h2 { font-size: 49px; }
  .product-final { padding: 80px 22px; }
  .product-final h2 { font-size: 54px; }
  .mobile-purchase-bar { position: sticky; z-index: 45; bottom: 0; padding: 10px 14px; display: flex; justify-content: space-between; align-items: center; gap: 14px; background: rgba(8,18,23,0.96); color: var(--white); border-top: 1px solid var(--line-dark); backdrop-filter: blur(14px); }
  .mobile-purchase-bar span { display: block; color: var(--mist); font-family: ui-monospace, monospace; font-size: 8px; letter-spacing: 0.1em; }
  .mobile-purchase-bar strong { font-size: 15px; }
  .mobile-purchase-bar .button { min-height: 44px; padding: 0 20px; }
  .checkout-header { height: 72px; padding: 0 18px; }
  .checkout-return { font-size: 13px; }
  .checkout-shell { width: calc(100vw - 32px); padding: 38px 0 70px; gap: 46px; }
  .checkout-intro h1 { font-size: 49px; }
  .checkout-progress { margin: 38px 0; }
  .checkout-progress li { align-items: flex-start; flex-direction: column; gap: 4px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .wide { grid-column: auto; }
  .order-review { padding: 22px 18px; }
  .order-product { grid-template-columns: 96px 1fr; }
  .order-product img { width: 96px; height: 84px; }
  .confirmation-actions { flex-direction: column; }
  .checkout-footer { padding: 24px 18px; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}