@font-face {
  font-family: "Inter";
  src: url("assets/Inter-VariableFont_opsz,wght.ttf") format("truetype");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --deep: #030f38;
  --blue: #2b58a8;
  --signal: #14d8e6;
  --green: #8bf266;
  --ink: #0b1533;
  --muted: #586174;
  --paper: #ffffff;
  --mist: #f0f2f5;
  --line: #cbd1da;
  --header-height: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Inter", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0;
}
body.menu-open { 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; }
h1, h2, h3, p, figure { margin-top: 0; }
h1, h2, h3 { line-height: 1.04; letter-spacing: 0; }
h2 { margin-bottom: 24px; font-size: clamp(2.25rem, 4.2vw, 4.6rem); font-weight: 570; }
h3 { font-size: 1.25rem; }
p { color: var(--muted); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  left: 16px;
  top: 8px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--deep);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(20px, 4vw, 64px);
  color: var(--deep);
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid rgba(3,15,56,.12);
  backdrop-filter: blur(12px);
}
.wordmark { width: 112px; display: inline-flex; align-items: center; justify-self: start; text-decoration: none; }
.wordmark img { width: 100%; height: auto; }
.desktop-nav { display: flex; gap: 28px; }
.desktop-nav a, .footer-links a { font-size: .82rem; font-weight: 620; text-decoration: none; }
.desktop-nav a { position: relative; }
.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -8px;
  height: 2px;
  background: var(--blue);
  transition: right .2s ease;
}
.desktop-nav a:hover::after { right: 0; }
.header-cta {
  justify-self: end;
  padding: 10px 16px;
  color: white;
  background: var(--deep);
  font-size: .82rem;
  font-weight: 650;
  text-decoration: none;
}
.header-actions { justify-self: end; display: flex; align-items: center; gap: 10px; }
.cart-button {
  min-height: 38px;
  padding: 8px 13px;
  color: var(--deep);
  background: transparent;
  border: 1px solid rgba(3,15,56,.3);
  cursor: pointer;
  font-size: .78rem;
  font-weight: 700;
}
.cart-button span { display: inline-grid; min-width: 18px; height: 18px; margin-left: 4px; place-items: center; color: white; background: var(--blue); font-size: .65rem; }
.menu-button, .mobile-menu { display: none; }

.hero {
  position: relative;
  min-height: 86svh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 50px) clamp(20px, 6vw, 96px) 56px;
  background: #dce5ea url("assets/hero-diver.webp") 58% center / cover no-repeat;
  overflow: hidden;
}
.hero::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 38%; background: rgba(238,243,246,.76); }
.hero-content { position: relative; z-index: 2; width: min(450px, 36vw); }
.eyebrow {
  margin-bottom: 20px;
  color: var(--blue);
  font-size: .72rem;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}
.hero h1 { margin-bottom: 8px; color: var(--deep); font-size: clamp(3.5rem, 5vw, 5.2rem); font-weight: 760; }
.hero-tagline { margin-bottom: 18px; color: var(--blue); font-size: clamp(1.3rem, 2.2vw, 2rem); font-weight: 560; }
.hero-copy { max-width: 535px; margin-bottom: 28px; color: #25304e; font-size: 1.02rem; }
.signup-form { display: flex; width: min(100%, 590px); }
.signup-form input {
  min-width: 0;
  flex: 1;
  height: 54px;
  padding: 0 18px;
  color: var(--deep);
  background: rgba(255,255,255,.96);
  border: 1px solid var(--deep);
  border-radius: 0;
}
.signup-form button {
  min-height: 54px;
  padding: 0 22px;
  color: white;
  background: var(--deep);
  border: 1px solid var(--deep);
  border-radius: 0;
  cursor: pointer;
  font-size: .86rem;
  font-weight: 700;
}
.signup-form button:hover { background: var(--blue); border-color: var(--blue); }
.form-note { margin: 8px 0 0; color: #465069; font-size: .72rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-price { display: flex; align-items: baseline; gap: 12px; margin: 25px 0 18px; }
.hero-price strong { color: var(--deep); font-size: 1.72rem; font-weight: 650; }
.hero-price span { color: var(--muted); font-size: .7rem; }
.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  font-size: .84rem;
  font-weight: 720;
  text-decoration: none;
}
.button-primary { color: white; background: var(--deep); border-color: var(--deep); }
.button-primary:hover { background: var(--blue); border-color: var(--blue); }
.button-secondary { color: var(--deep); background: rgba(255,255,255,.45); border-color: var(--deep); }
.button-secondary:hover { background: white; }
.button-signal { color: var(--deep); background: var(--green); border-color: var(--green); }
.button-signal:hover { background: white; border-color: white; }
.commerce-note { margin: 13px 0 0; color: #465069; font-size: .68rem; }
.hero-label {
  position: absolute;
  right: 6vw;
  top: 28%;
  display: flex;
  align-items: center;
  color: var(--deep);
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
}
.hero-label i { order: -1; display: block; width: 170px; height: 1px; margin-right: 12px; background: var(--deep); transform: rotate(-20deg); transform-origin: right; }
.scroll-cue {
  position: absolute;
  right: clamp(20px, 6vw, 96px);
  bottom: 25px;
  z-index: 2;
  color: var(--deep);
  font-size: .75rem;
  font-weight: 650;
  text-decoration: none;
}
.scroll-cue span { display: inline-block; margin-left: 8px; }

.section { padding: clamp(82px, 10vw, 148px) clamp(20px, 6vw, 96px); }
.section-intro { width: min(900px, 100%); margin-bottom: 62px; }
.section-intro > p:last-child { max-width: 680px; font-size: 1.05rem; }
.section-intro.on-dark h2, .section-intro.on-dark p { color: white; }
.section-intro.on-dark .eyebrow { color: var(--signal); }

.data-strip { padding: 90px clamp(20px, 6vw, 96px); color: white; background: var(--deep); }
.data-strip .section-intro { margin-bottom: 58px; }
.data-strip .section-intro h2 { max-width: 980px; }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.28); border-bottom: 1px solid rgba(255,255,255,.28); }
.metric { min-width: 0; padding: 25px 26px 30px; border-right: 1px solid rgba(255,255,255,.28); }
.metric:first-child { padding-left: 0; }
.metric:last-child { border-right: 0; }
.metric span { display: block; margin-bottom: 18px; color: #aeb9d6; font-size: .73rem; text-transform: uppercase; }
.metric strong { display: block; color: white; font-size: clamp(2.3rem, 4vw, 5.2rem); font-weight: 420; line-height: 1; white-space: nowrap; }
.metric small { margin-left: 5px; color: var(--signal); font-size: .32em; font-weight: 620; }

.closer-look { background: var(--paper); }
.product-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(340px, .9fr); gap: clamp(44px, 7vw, 110px); align-items: center; }
.product-visual { margin: 0; min-height: 560px; display: grid; place-items: center; background: var(--mist); }
.product-visual img { width: min(88%, 760px); height: auto; aspect-ratio: auto; object-fit: contain; mix-blend-mode: multiply; }
.product-visual figcaption { align-self: end; width: 100%; padding: 16px 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: .72rem; }
.product-spin { grid-template-rows: minmax(0, 1fr) auto; }
.product-spin-stage { width: 100%; min-height: 0; display: grid; place-items: center; overflow: hidden; cursor: ew-resize; touch-action: pan-y; }
.product-spin-stage:focus-visible { outline-offset: -4px; }
.product-spin video { width: min(94%, 860px); height: auto; aspect-ratio: 92 / 65; object-fit: contain; mix-blend-mode: multiply; user-select: none; }
.feature-list { border-top: 1px solid var(--line); }
.feature-list article { display: grid; grid-template-columns: 50px 1fr; gap: 18px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.feature-list article > span { color: var(--blue); font-size: .75rem; font-weight: 700; }
.feature-list h3 { margin-bottom: 10px; }
.feature-list p { margin-bottom: 0; }

.installation { background: var(--mist); }
.install-visuals { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.install-visuals figure { margin: 0; aspect-ratio: 1.42; display: grid; place-items: center; overflow: hidden; background: white; }
.install-visuals img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.install-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 50px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.install-steps li { padding: 28px 34px 0 0; border-right: 1px solid var(--line); }
.install-steps li + li { padding-left: 34px; }
.install-steps li:last-child { border-right: 0; }
.install-steps span { display: block; margin-bottom: 22px; color: var(--blue); font-size: .72rem; font-weight: 700; }
.install-steps strong { display: block; margin-bottom: 9px; font-size: 1.15rem; }
.install-steps p { margin-bottom: 0; }

.interface-section { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(60px, 8vw, 130px); align-items: center; color: white; background: #05070d; }
.interface-copy h2, .interface-copy p { color: white; }
.interface-copy .eyebrow { color: var(--signal); }
.interface-copy > p:not(.eyebrow):not(.interface-caption) { color: #b4bdca; }
.view-switcher { display: inline-flex; margin: 28px 0 20px; border: 1px solid #4b5260; }
.view-switcher button { min-width: 96px; padding: 11px 14px; color: #cbd4e2; background: transparent; border: 0; border-right: 1px solid #4b5260; cursor: pointer; font-size: .8rem; }
.view-switcher button:last-child { border-right: 0; }
.view-switcher button.is-active { color: #02070d; background: var(--signal); }
.interface-caption { min-height: 50px; color: #8d97a6 !important; font-size: .82rem; }
.interface-stage { min-width: 0; }
.lens-frame { position: relative; aspect-ratio: 1.45; display: grid; place-items: center; overflow: hidden; border: 1px solid #303847; background: #000; }
.lens-frame::before, .lens-frame::after { content: ""; position: absolute; width: 42px; height: 42px; z-index: 2; border-color: var(--signal); border-style: solid; }
.lens-frame::before { left: 18px; top: 18px; border-width: 1px 0 0 1px; }
.lens-frame::after { right: 18px; bottom: 18px; border-width: 0 1px 1px 0; }
.lens-label { position: absolute; top: 20px; right: 22px; z-index: 2; color: var(--signal); font-size: .62rem; font-weight: 700; }
.lens-frame video { width: min(72%, 540px); aspect-ratio: 1; object-fit: contain; }
.interface-stage > p { margin: 12px 0 0; color: #747e8f; font-size: .7rem; }

.modes { color: white; background: var(--blue); }
.modes .section-intro h2, .modes .section-intro p { color: white; }
.modes .section-intro .eyebrow { color: white; }
.mode-switcher { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.42); border-bottom: 1px solid rgba(255,255,255,.42); }
.mode-switcher button { padding: 19px 20px; color: #d9e2f2; background: transparent; border: 0; border-right: 1px solid rgba(255,255,255,.42); cursor: pointer; }
.mode-switcher button:last-child { border-right: 0; }
.mode-switcher button[aria-selected="true"] { color: var(--deep); background: white; font-weight: 700; }
.mode-panel { min-height: 360px; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; padding: 58px 0; }
.mode-index { margin-bottom: 42px; color: #d9e2f2; font-size: .7rem; }
.mode-panel h3 { margin-bottom: 18px; color: white; font-size: clamp(2rem, 4vw, 4.2rem); font-weight: 520; }
.mode-panel p { max-width: 620px; color: white; }
.mode-panel dl { margin: 0; border-top: 1px solid rgba(255,255,255,.42); }
.mode-panel dl div { display: grid; grid-template-columns: 1fr 1.6fr; gap: 20px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.42); }
.mode-panel dt { color: #d9e2f2; font-size: .74rem; }
.mode-panel dd { margin: 0; font-weight: 620; }
.mode-disclaimer { margin: 0; color: #d9e2f2; font-size: .72rem; }

.team { display: grid; grid-template-columns: .95fr 1.05fr; gap: clamp(60px, 8vw, 130px); align-items: center; }
.team-copy > p:not(.eyebrow) { max-width: 680px; }
.team-points { margin-top: 42px; border-top: 1px solid var(--line); }
.team-points > div { display: grid; grid-template-columns: 170px 1fr; gap: 30px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.team-points p { margin: 0; }
.team-demo { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 26px; background: var(--deep); }
.team-demo img, .team-demo video { width: 100%; height: auto; aspect-ratio: 4 / 5; align-self: start; background: #000; }
.team-demo img { object-fit: cover; }
.team-demo video { object-fit: contain; }
.team-demo p { grid-column: 1 / -1; margin: 6px 0 0; color: #aab5cc; font-size: .7rem; }

.evidence { min-height: 780px; display: grid; grid-template-columns: 1.05fr .95fr; color: white; background: var(--deep); }
.evidence-image { min-height: 660px; background: #1c2a36 url("assets/real-water-photographer.webp") center / cover no-repeat; }
.evidence-content { display: flex; flex-direction: column; justify-content: center; padding: clamp(70px, 8vw, 120px); }
.evidence-content .eyebrow { color: var(--signal); }
.evidence-content h2, .evidence-content > p { color: white; }
.evidence-stats { display: grid; grid-template-columns: repeat(3, 1fr); margin: 42px 0 28px; border-top: 1px solid rgba(255,255,255,.3); border-bottom: 1px solid rgba(255,255,255,.3); }
.evidence-stats div { padding: 24px 20px 24px 0; }
.evidence-stats strong { display: block; color: var(--signal); font-size: clamp(2rem, 3vw, 3.4rem); font-weight: 430; white-space: nowrap; }
.evidence-stats span { display: block; color: #bac4da; font-size: .69rem; }
.evidence-content .fine-print { margin-bottom: 0; color: #97a3bb; font-size: .7rem; }

.engineering { background: var(--mist); }
.exploded-view { position: relative; height: clamp(820px, 132vh, 1260px); margin: 0; }
.exploded-sticky { position: sticky; top: calc(var(--header-height) + 24px); overflow: hidden; background: white; }
.exploded-view video { width: 100%; aspect-ratio: 16 / 9; object-fit: contain; background: white; }
.exploded-view figcaption { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.exploded-view figcaption span { position: relative; padding: 16px 20px; border-right: 1px solid var(--line); color: var(--muted); font-size: .7rem; transition: color .2s ease, background-color .2s ease; }
.exploded-view figcaption span::before { content: ""; position: absolute; inset: 0 auto auto 0; width: 0; height: 2px; background: var(--blue); transition: width .2s ease; }
.exploded-view figcaption span.is-active { color: var(--deep); background: #f7f9fb; }
.exploded-view figcaption span.is-active::before { width: 100%; }
.exploded-view figcaption span:last-child { border-right: 0; }

.app-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(60px, 9vw, 150px); align-items: center; overflow: hidden; background: #f6f7f8; }
.app-copy p:not(.eyebrow) { max-width: 610px; }
.app-copy ul { margin: 36px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.app-copy li { padding: 17px 0; border-bottom: 1px solid var(--line); font-weight: 590; }
.phones { position: relative; min-height: 740px; }
.phone { position: absolute; width: min(46%, 320px); margin: 0; filter: drop-shadow(0 24px 30px rgba(10,18,42,.14)); }
.phone img { width: 100%; border: 9px solid #111726; border-radius: 30px; }
.phone-back { left: 8%; top: 0; transform: rotate(-4deg); }
.phone-front { right: 8%; bottom: 0; z-index: 2; transform: rotate(3deg); }

.faq .section-intro { margin-bottom: 40px; }
.accordion { border-top: 1px solid var(--line); }
.accordion article { border-bottom: 1px solid var(--line); }
.accordion h3 { margin: 0; }
.accordion button { width: 100%; display: grid; grid-template-columns: 1fr 28px; gap: 20px; align-items: center; padding: 25px 0; text-align: left; color: var(--ink); background: transparent; border: 0; cursor: pointer; font-size: clamp(1rem, 1.6vw, 1.28rem); font-weight: 620; }
.accordion i { position: relative; width: 18px; height: 18px; }
.accordion i::before, .accordion i::after { content: ""; position: absolute; left: 0; top: 8px; width: 18px; height: 2px; background: var(--blue); }
.accordion i::after { transform: rotate(90deg); transition: transform .2s ease; }
.accordion button[aria-expanded="true"] i::after { transform: rotate(0); }
.answer { max-width: 850px; padding: 0 50px 24px 0; }
.answer p { margin: 0; }

.final-cta { min-height: 610px; display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 90px 20px; text-align: center; color: white; background: var(--blue); }
.final-cta .eyebrow, .final-cta h2, .final-cta > p { color: white; }
.final-cta h2 { font-size: clamp(3rem, 6vw, 6rem); }
.final-cta > p:not(.eyebrow):not(.form-note) { margin-bottom: 30px; }
.final-cta .button-signal { color: white; background: var(--deep); border-color: var(--deep); }
.final-cta .button-signal:hover { color: var(--deep); background: white; border-color: white; }
.final-form { width: min(590px, 100%); }
.final-form input { border-color: white; }
.final-form button { color: var(--deep); background: var(--green); border-color: var(--green); }
.final-cta .form-note { color: #d8e0ee; }

.site-footer { display: grid; grid-template-columns: 1fr auto 1fr; gap: 40px; align-items: end; padding: 60px clamp(20px, 6vw, 96px); color: white; background: var(--deep); }
.site-footer img { width: 156px; height: auto; margin-bottom: 20px; }
.site-footer p { margin: 0; color: #aeb8cd; font-size: .72rem; }
.footer-links { display: flex; gap: 22px; }
.footer-meta { justify-self: end; text-align: right; }
.footer-meta p + p { margin-top: 8px; }

.cart-overlay { position: fixed; inset: 0; z-index: 80; background: rgba(3,15,56,.52); }
.cart-overlay[hidden] { display: none; }
.cart-drawer {
  position: fixed;
  inset: 0 0 0 auto;
  z-index: 90;
  width: min(460px, 100%);
  display: flex;
  flex-direction: column;
  padding: 24px;
  color: var(--ink);
  background: white;
  transform: translateX(100%);
  transition: transform .26s ease;
  box-shadow: -20px 0 40px rgba(3,15,56,.15);
}
.cart-drawer.is-open { transform: translateX(0); }
.cart-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.cart-head h2 { margin: 0; font-size: 1.55rem; }
.cart-head button { width: 42px; height: 42px; color: var(--deep); background: transparent; border: 1px solid var(--line); cursor: pointer; font-size: 1.5rem; }
.cart-empty { display: grid; gap: 15px; place-items: start; padding: 50px 0; }
.cart-line { grid-template-columns: 90px 1fr auto; gap: 16px; align-items: start; padding: 24px 0; border-bottom: 1px solid var(--line); }
.cart-line:not([hidden]) { display: grid; }
.cart-line img { width: 90px; height: 90px; object-fit: contain; background: var(--mist); mix-blend-mode: multiply; }
.cart-line > div > strong, .cart-line > strong { font-size: .88rem; }
.cart-line p { margin: 5px 0 12px; font-size: .7rem; }
.cart-quantity { display: inline-grid; grid-template-columns: 30px 34px 30px; border: 1px solid var(--line); }
.cart-quantity button { height: 30px; color: var(--deep); background: transparent; border: 0; cursor: pointer; }
.cart-quantity span { display: grid; place-items: center; font-size: .75rem; }
.cart-summary { margin-top: auto; padding-top: 24px; border-top: 1px solid var(--line); }
.cart-summary > div { display: flex; justify-content: space-between; margin-bottom: 8px; }
.cart-summary > p { font-size: .72rem; }
.cart-summary .button { width: 100%; }
.checkout-note { color: var(--muted); text-align: center; }

/* Product detail page */
.product-purchase {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(400px, .92fr);
  gap: clamp(46px, 7vw, 110px);
  align-items: start;
  padding: calc(var(--header-height) + 64px) clamp(20px, 6vw, 96px) clamp(80px, 9vw, 132px);
  background: white;
}
.product-gallery { min-width: 0; }
.gallery-stage { aspect-ratio: 1.12; display: grid; place-items: center; overflow: hidden; background: var(--mist); }
.gallery-stage img { width: 92%; height: 92%; object-fit: contain; mix-blend-mode: multiply; }
.gallery-thumbs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-top: 10px; }
.gallery-thumbs button { aspect-ratio: 1; padding: 5px; overflow: hidden; background: var(--mist); border: 1px solid transparent; cursor: pointer; }
.gallery-thumbs button.is-active { border-color: var(--blue); }
.gallery-thumbs img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.gallery-note { margin: 10px 0 0; font-size: .68rem; }
.product-info { position: sticky; top: calc(var(--header-height) + 28px); }
.product-info .eyebrow { margin-bottom: 14px; }
.product-info h1 { max-width: 700px; margin-bottom: 22px; color: var(--deep); font-size: clamp(3rem, 5vw, 5.7rem); font-weight: 580; }
.product-lead { max-width: 660px; font-size: 1.03rem; }
.product-price { display: flex; align-items: baseline; gap: 12px; margin: 30px 0; padding: 21px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.product-price strong { color: var(--deep); font-size: 1.8rem; font-weight: 620; }
.product-price span { color: var(--muted); font-size: .7rem; }
.product-form fieldset { margin: 0 0 24px; padding: 0; border: 0; }
.product-form legend, .select-label { display: block; margin-bottom: 12px; font-size: .78rem; font-weight: 580; }
.product-form legend strong { margin-left: 7px; }
.color-options { display: flex; gap: 10px; }
.color-options label { position: relative; min-width: 150px; display: flex; align-items: center; gap: 9px; padding: 11px; border: 1px solid var(--line); cursor: pointer; }
.color-options input { position: absolute; opacity: 0; }
.color-options label:has(input:checked) { border-color: var(--deep); box-shadow: inset 0 0 0 1px var(--deep); }
.color-options em { font-size: .74rem; font-style: normal; }
.swatch { width: 24px; height: 24px; border: 1px solid rgba(3,15,56,.25); }
.swatch-deep { background: #090c17; }
.swatch-blue { background: var(--blue); }
.product-form select, .product-form > input { width: 100%; height: 52px; padding: 0 14px; color: var(--deep); background: white; border: 1px solid var(--line); border-radius: 0; }
.product-form > input::placeholder { color: #7b8392; }
.product-form > input:focus { outline: 2px solid var(--signal); outline-offset: 2px; border-color: var(--deep); }
.option-note { margin: 7px 0 22px; font-size: .68rem; }
.option-note a { color: var(--blue); font-weight: 650; }
.addon-option { display: grid; grid-template-columns: 24px 1fr; gap: 10px; align-items: start; margin: 0 0 24px; padding: 18px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); cursor: pointer; }
.addon-option input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--blue); }
.addon-option strong, .addon-option small { display: block; }
.addon-option strong { font-size: .84rem; }
.addon-option small { margin-top: 3px; color: var(--muted); font-size: .7rem; }
.buy-row { display: grid; grid-template-columns: 126px 1fr; gap: 10px; }
.quantity-stepper { height: 54px; display: grid; grid-template-columns: 38px 1fr 38px; border: 1px solid var(--deep); }
.quantity-stepper button { color: var(--deep); background: white; border: 0; cursor: pointer; font-size: 1.1rem; }
.quantity-stepper input { min-width: 0; width: 100%; text-align: center; border: 0; -moz-appearance: textfield; }
.quantity-stepper input::-webkit-inner-spin-button { -webkit-appearance: none; }
.add-to-cart { width: 100%; }
.express-buy { width: 100%; margin-top: 9px; color: var(--deep); background: var(--green); border-color: var(--green); }
.express-buy:hover { background: #b0fa95; }
.product-form-status { min-height: 22px; margin: 8px 0 0; color: var(--blue); font-size: .72rem; }
.purchase-notes { margin-top: 25px; border-top: 1px solid var(--line); }
.purchase-notes p { display: grid; grid-template-columns: 145px 1fr; gap: 18px; margin: 0; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: .7rem; }
.purchase-notes strong { color: var(--ink); }
.purchase-notes span { color: var(--muted); }
.purchase-band { display: grid; grid-template-columns: repeat(4, 1fr); padding: 0 clamp(20px, 6vw, 96px); color: white; background: var(--deep); }
.purchase-band div { padding: 36px 25px; border-right: 1px solid rgba(255,255,255,.25); }
.purchase-band div:first-child { padding-left: 0; }
.purchase-band div:last-child { border-right: 0; }
.purchase-band strong, .purchase-band span { display: block; }
.purchase-band strong { margin-bottom: 7px; color: var(--signal); font-size: 1.2rem; }
.purchase-band span { color: #aeb9d6; font-size: .68rem; }
.product-story { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(60px, 9vw, 150px); align-items: center; color: white; background: #05070d; }
.story-copy h2, .story-copy p { color: white; }
.story-copy .eyebrow { color: var(--signal); }
.story-copy > p:not(.eyebrow) { color: #afb9c8; }
.text-link { display: inline-block; margin-top: 20px; color: var(--signal); font-size: .78rem; font-weight: 700; text-decoration: none; }
.text-link span { margin-left: 8px; }
.story-interface { padding: 34px; border: 1px solid #303847; background: #000; }
.story-interface video { width: min(100%, 620px); margin: auto; aspect-ratio: 1.1; object-fit: contain; }
.story-interface p { margin: 10px 0 0; color: #7f8999; font-size: .68rem; }
.real-use { min-height: 760px; display: grid; grid-template-columns: 1fr 1fr; background: var(--mist); }
.real-use figure { min-height: 700px; margin: 0; overflow: hidden; }
.real-use img { width: 100%; height: 100%; object-fit: cover; }
.real-use > div { display: flex; flex-direction: column; justify-content: center; padding: clamp(60px, 8vw, 120px); }
.real-use dl { margin: 35px 0 0; border-top: 1px solid var(--line); }
.real-use dl div { display: grid; grid-template-columns: 1fr 1fr; padding: 16px 0; border-bottom: 1px solid var(--line); }
.real-use dt { color: var(--muted); font-size: .72rem; }
.real-use dd { margin: 0; font-weight: 620; }
.product-details { background: white; }
.details-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(50px, 8vw, 120px); align-items: center; }
.included-list { border-top: 1px solid var(--line); }
.included-list article { display: grid; grid-template-columns: 45px 1fr; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.included-list article > span { color: var(--blue); font-size: .72rem; font-weight: 700; }
.included-list h3 { margin-bottom: 7px; }
.included-list p { margin: 0; }
.battery-figure { margin: 0; }
.battery-figure img { width: 100%; max-height: 720px; object-fit: cover; }
.battery-figure figcaption { padding: 12px 0; color: var(--muted); font-size: .68rem; }
.specifications { color: white; background: var(--blue); }
.specifications .section-intro h2, .specifications .section-intro p { color: white; }
.specifications .eyebrow { color: white; }
.spec-table { margin: 0; border-top: 1px solid rgba(255,255,255,.4); }
.spec-table div { display: grid; grid-template-columns: minmax(180px, .65fr) 1.35fr; gap: 40px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.4); }
.spec-table dt { color: #d8e1f0; font-size: .74rem; }
.spec-table dd { margin: 0; font-weight: 580; }
.spec-note { margin: 22px 0 0; color: #d8e1f0; font-size: .7rem; }
.product-final { min-height: 540px; }
.mobile-buy-bar { display: none; }

/* Checkout */
.checkout-page { min-height: 100vh; background: #f5f7f8; }
.checkout-header { min-height: var(--header-height); display: flex; align-items: center; justify-content: space-between; padding: 0 clamp(20px, 6vw, 96px); background: white; border-bottom: 1px solid var(--line); }
.checkout-back { color: var(--deep); font-size: .76rem; font-weight: 650; text-decoration: none; }
.checkout-back:hover { text-decoration: underline; }
.checkout-shell { width: min(1440px, 100%); min-height: calc(100vh - var(--header-height)); display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(380px, .72fr); margin: auto; }
.checkout-form-panel { padding: clamp(58px, 7vw, 100px) clamp(24px, 7vw, 110px); background: white; }
.checkout-form-panel > h1 { max-width: 720px; margin-bottom: 52px; color: var(--deep); font-size: clamp(3rem, 5vw, 5.6rem); font-weight: 580; }
.checkout-form-panel form { max-width: 780px; }
.checkout-form-panel fieldset { margin: 0 0 36px; padding: 0 0 34px; border: 0; border-bottom: 1px solid var(--line); }
.checkout-form-panel legend { width: 100%; display: flex; gap: 18px; margin-bottom: 22px; color: var(--deep); font-size: 1.15rem; font-weight: 650; }
.checkout-form-panel legend span { color: var(--blue); font-size: .7rem; line-height: 1.8; }
.checkout-fields { display: grid; gap: 14px; margin-top: 14px; }
.checkout-fields.two-up { grid-template-columns: 1fr 1fr; }
.checkout-fields label, .checkout-form-panel fieldset > label { display: block; margin-bottom: 7px; color: var(--ink); font-size: .7rem; font-weight: 620; }
.checkout-fields input, .checkout-form-panel fieldset > input, .checkout-fields select { width: 100%; min-height: 52px; padding: 0 13px; color: var(--deep); background: white; border: 1px solid var(--line); border-radius: 0; }
.checkout-fields input:focus, .checkout-form-panel fieldset > input:focus, .checkout-fields select:focus { outline: 2px solid var(--signal); outline-offset: 2px; border-color: var(--deep); }
.checkout-method { display: grid; gap: 4px; padding: 18px; background: var(--mist); border-left: 3px solid var(--signal); }
.checkout-method strong { color: var(--deep); font-size: .82rem; }
.checkout-method span { color: var(--muted); font-size: .72rem; }
.checkout-submit { width: 100%; min-height: 58px; }
.checkout-submit:disabled { cursor: not-allowed; opacity: .45; }
.checkout-prototype-note { margin: 12px 0 0; min-height: 22px; color: var(--muted); text-align: center; font-size: .69rem; }
.checkout-summary { padding: clamp(58px, 7vw, 100px) clamp(24px, 5vw, 72px); background: #e9edf0; }
.checkout-summary h2 { margin-bottom: 36px; color: var(--deep); font-size: 1.4rem; font-weight: 650; }
.checkout-product { display: grid; grid-template-columns: 94px 1fr auto; gap: 15px; align-items: start; padding-bottom: 26px; border-bottom: 1px solid var(--line); }
.checkout-product img { width: 94px; height: 94px; object-fit: contain; background: white; mix-blend-mode: multiply; }
.checkout-product > div > strong, .checkout-product > strong { color: var(--deep); font-size: .82rem; }
.checkout-product p { margin: 5px 0 8px; font-size: .68rem; overflow-wrap: anywhere; }
.checkout-product span { color: var(--muted); font-size: .68rem; }
.checkout-totals { margin: 24px 0 0; }
.checkout-totals div { display: flex; justify-content: space-between; gap: 20px; padding: 8px 0; }
.checkout-totals dt, .checkout-totals dd { font-size: .76rem; }
.checkout-totals dt { color: var(--muted); }
.checkout-totals dd { margin: 0; color: var(--deep); }
.checkout-totals .checkout-grand-total { margin-top: 18px; padding-top: 19px; border-top: 1px solid var(--line); }
.checkout-grand-total dt, .checkout-grand-total dd { color: var(--deep); font-size: 1rem; font-weight: 680; }
.checkout-fit-note { margin: 30px 0 0; padding: 18px; color: var(--muted); background: white; font-size: .7rem; }
.checkout-fit-note strong { display: block; margin-bottom: 5px; color: var(--deep); }
.checkout-empty { padding: 28px 0; }
.checkout-empty .button { margin-top: 8px; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto auto; }
  .desktop-nav { display: none; }
  .header-cta { margin-right: 16px; }
  .menu-button { width: 42px; height: 42px; display: grid; place-content: center; gap: 6px; background: transparent; border: 1px solid rgba(3,15,56,.25); cursor: pointer; }
  .menu-button span { display: block; width: 18px; height: 2px; background: var(--deep); transition: transform .2s ease; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .mobile-menu { position: fixed; inset: var(--header-height) 0 0; display: flex; flex-direction: column; padding: 40px 24px; background: white; }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu a { padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 1.25rem; font-weight: 620; text-decoration: none; }
  .mobile-menu > button { padding: 18px 0; color: var(--deep); text-align: left; background: transparent; border: 0; border-bottom: 1px solid var(--line); font-size: 1.25rem; font-weight: 620; }
  .hero {
    min-height: 88svh;
    align-items: flex-end;
    padding-bottom: 52px;
  }
  .hero::before { inset: 48% 0 0; width: auto; background: rgba(238,243,246,.86); }
  .hero-content { width: min(570px, 72vw); }
  .hero h1 { font-size: clamp(3.5rem, 6.5vw, 5rem); }
  .hero-label { display: none; }
  .product-layout, .interface-section, .team, .app-section { grid-template-columns: 1fr; }
  .product-layout, .interface-section, .team { gap: 65px; }
  .product-visual { min-height: 440px; }
  .exploded-view { height: clamp(720px, 120vh, 1040px); }
  .evidence { grid-template-columns: 1fr; }
  .evidence-image { min-height: 68vw; }
  .app-section { padding-bottom: 70px; }
  .phones { min-height: 690px; }
  .product-purchase { grid-template-columns: 1fr; }
  .product-info { position: static; }
  .product-story, .details-grid { grid-template-columns: 1fr; }
  .real-use { grid-template-columns: 1fr; }
  .real-use figure { min-height: 78vw; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .footer-meta { grid-column: 1 / -1; justify-self: start; text-align: left; }
  .checkout-shell { grid-template-columns: 1fr; }
  .checkout-summary { grid-row: 1; }
}

@media (max-width: 700px) {
  :root { --header-height: 62px; }
  h2 { font-size: 2.35rem; }
  .site-header { padding-inline: 16px; }
  .wordmark { width: 100px; }
  .header-cta { display: none; }
  .header-actions { margin-right: 8px; }
  .hero {
    min-height: 88svh;
    align-items: flex-end;
    padding: calc(var(--header-height) + 30px) 18px 44px;
    background-position: 59% center;
  }
  .hero::before { inset: 45% 0 0; }
  .hero-content { width: 100%; }
  .hero-content { margin-left: 0; }
  .hero .eyebrow { margin-bottom: 10px; }
  .hero > .hero-content > .eyebrow { display: none; }
  .hero h1 { font-size: 3.75rem; }
  .hero-tagline { font-size: 1.22rem; }
  .hero-copy { margin-bottom: 20px; font-size: .9rem; }
  .hero-price { margin: 18px 0 14px; }
  .hero-price strong { font-size: 1.45rem; }
  .hero-form { width: 100%; }
  .scroll-cue { display: none; }
  .signup-form { flex-direction: column; gap: 8px; }
  .signup-form input { flex: none; min-height: 54px; }
  .signup-form button { width: 100%; }
  .section { padding: 82px 18px; }
  .section-intro { margin-bottom: 42px; }
  .data-strip { padding: 74px 18px; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metric { padding: 20px 12px 22px 0; border-bottom: 1px solid rgba(255,255,255,.28); }
  .metric:nth-child(even) { padding-left: 18px; border-right: 0; }
  .metric:nth-child(n+3) { border-bottom: 0; }
  .metric strong { font-size: 2.55rem; }
  .product-visual { min-height: 330px; }
  .product-visual img { width: 95%; }
  .product-spin video { width: 100%; }
  .install-visuals { grid-template-columns: 1fr; }
  .install-steps { grid-template-columns: 1fr; }
  .install-steps li, .install-steps li + li { padding: 23px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .install-steps span { margin-bottom: 10px; }
  .view-switcher { width: 100%; }
  .view-switcher button { min-width: 0; flex: 1; }
  .lens-frame { aspect-ratio: 1.12; }
  .lens-frame video { width: 88%; }
  .mode-switcher { grid-template-columns: 1fr; }
  .mode-switcher button { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.42); }
  .mode-switcher button:last-child { border-bottom: 0; }
  .mode-panel { min-height: 0; grid-template-columns: 1fr; gap: 38px; padding: 45px 0; }
  .mode-index { margin-bottom: 18px; }
  .team-points > div { grid-template-columns: 1fr; gap: 7px; }
  .team-demo { padding: 22px; }
  .team-demo { grid-template-columns: 1fr; }
  .team-demo video { aspect-ratio: 1; }
  .team-demo p { grid-column: auto; }
  .evidence-image { min-height: 92vw; background-position: 55% center; }
  .evidence-content { padding: 74px 18px; }
  .evidence-stats { grid-template-columns: 1fr; }
  .evidence-stats div { display: grid; grid-template-columns: 120px 1fr; align-items: baseline; border-bottom: 1px solid rgba(255,255,255,.25); }
  .evidence-stats div:last-child { border-bottom: 0; }
  .evidence-stats strong { font-size: 2.5rem; }
  .exploded-view { height: max(660px, 112vh); }
  .exploded-sticky { top: calc(var(--header-height) + 12px); }
  .exploded-view figcaption { grid-template-columns: 1fr 1fr; }
  .exploded-view figcaption span { border-bottom: 1px solid var(--line); }
  .phones { min-height: 560px; }
  .phone { width: 60%; }
  .phone-back { left: 0; }
  .phone-front { right: 0; }
  .phone img { border-width: 6px; border-radius: 24px; }
  .product-purchase { gap: 48px; padding: calc(var(--header-height) + 36px) 18px 80px; }
  .product-page { padding-bottom: 70px; }
  .mobile-buy-bar { position: fixed; inset: auto 0 0; z-index: 45; min-height: 70px; display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center; padding: 9px 14px; background: white; border-top: 1px solid var(--line); box-shadow: 0 -8px 24px rgba(3,15,56,.1); }
  .mobile-buy-bar strong, .mobile-buy-bar span { display: block; }
  .mobile-buy-bar strong { color: var(--deep); }
  .mobile-buy-bar span { color: var(--muted); font-size: .62rem; }
  .mobile-buy-bar .button { min-height: 48px; padding-inline: 18px; }
  .gallery-stage { aspect-ratio: 1; }
  .gallery-thumbs { gap: 5px; }
  .gallery-thumbs button { padding: 3px; }
  .product-info h1 { font-size: 3.25rem; }
  .color-options { display: grid; grid-template-columns: 1fr 1fr; }
  .color-options label { min-width: 0; }
  .buy-row { grid-template-columns: 1fr; }
  .quantity-stepper { grid-template-columns: 50px 1fr 50px; }
  .purchase-notes p { grid-template-columns: 1fr; gap: 4px; }
  .purchase-band { grid-template-columns: 1fr 1fr; padding: 0 18px; }
  .purchase-band div { padding: 25px 14px 25px 0; border-bottom: 1px solid rgba(255,255,255,.25); }
  .purchase-band div:nth-child(even) { padding-left: 14px; border-right: 0; }
  .purchase-band div:nth-child(n+3) { border-bottom: 0; }
  .story-interface { padding: 16px; }
  .real-use figure { min-height: 110vw; }
  .real-use > div { padding: 74px 18px; }
  .details-grid { gap: 45px; }
  .spec-table div { grid-template-columns: 1fr; gap: 5px; }
  .cart-drawer { padding: 18px; }
  .cart-line { grid-template-columns: 72px 1fr auto; gap: 10px; }
  .cart-line img { width: 72px; height: 72px; }
  .final-cta { min-height: 560px; }
  .site-footer { grid-template-columns: 1fr; align-items: start; padding: 50px 18px; }
  .footer-links { flex-wrap: wrap; }
  .footer-meta { grid-column: auto; }
  .checkout-header { padding-inline: 18px; }
  .checkout-form-panel, .checkout-summary { padding: 50px 18px; }
  .checkout-form-panel > h1 { margin-bottom: 38px; font-size: 3rem; }
  .checkout-fields.two-up { grid-template-columns: 1fr; }
  .checkout-product { grid-template-columns: 78px 1fr auto; gap: 10px; }
  .checkout-product img { width: 78px; height: 78px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .product-spin-stage { cursor: default; }
}