:root {
  --paper: #f5f5f7;
  --paper-2: #ffffff;
  --ink: #1d1d1f;
  --ink-2: #424245;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, .12);
  --clear: #0071e3;
  --clear-2: #0a84ff;
  --blue: #0071e3;
  --gold: #a06a00;
  --glass: #eaf7ff;
  --white: #ffffff;
  --night: #000000;
  --max: 1180px;
  --radius: 8px;
  --shadow: 0 34px 110px rgba(0, 0, 0, .14);
  --soft-shadow: 0 18px 54px rgba(0, 0, 0, .08);
  --hair-shadow: 0 1px 0 rgba(255, 255, 255, .72) inset;
  --font: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  letter-spacing: 0;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 1000;
  padding: 10px 12px;
  background: var(--white);
  color: var(--ink);
  transform: translateY(-150%);
}

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

/* ---------- header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 60;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 68px;
  padding: 0 clamp(18px, 4vw, 52px);
  color: rgba(255, 253, 247, .9);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  background: rgba(7, 9, 10, .22);
  backdrop-filter: blur(24px) saturate(160%);
  transition: background .24s ease, color .24s ease, border-color .24s ease;
}

.site-header.scrolled {
  color: var(--ink);
  background: rgba(245, 245, 247, .86);
  border-bottom-color: rgba(0, 0, 0, .08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  width: max-content;
}

.brand-mark {
  width: 30px;
  height: auto;
  filter: brightness(0) invert(1);
  transition: filter .24s ease;
}

.brand-word {
  height: 14px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: filter .24s ease;
}

.site-header.scrolled .brand-mark,
.site-header.scrolled .brand-word {
  filter: none;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 13px;
  font-weight: 500;
}

.desktop-nav a,
.footer-links a {
  color: currentColor;
  opacity: .72;
  transition: opacity .18s ease;
}

.desktop-nav a:hover,
.footer-links a:hover {
  opacity: 1;
}

.nav-cta {
  justify-self: end;
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: currentColor;
  transition: background .2s ease, color .2s ease;
}

.site-header.scrolled .nav-cta:hover {
  background: var(--ink);
  color: var(--paper);
}

.menu-button {
  display: none;
  justify-self: end;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: currentColor;
  background: transparent;
}

.menu-button span {
  display: block;
  width: 16px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: currentColor;
}

.mobile-nav {
  position: fixed;
  inset: 76px 12px auto;
  z-index: 55;
  display: none;
  flex-direction: column;
  padding: 8px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 247, .96);
  box-shadow: var(--shadow);
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  min-height: 54px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  font-weight: 600;
}

.mobile-nav a:last-child {
  border-bottom: 0;
}

/* ---------- reveal ---------- */
[data-reveal] {
  opacity: 1;
  transform: none;
}

.js [data-reveal] {
  opacity: 1;
  transform: none;
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}

html.js [data-reveal].in {
  opacity: 1;
  transform: none;
}

/* ---------- layout ---------- */
.section {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
  scroll-margin-top: 84px;
}

#demo,
#intelligence,
#opticians,
#contact {
  scroll-margin-top: 84px;
}

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, .94fr) minmax(420px, 1.06fr);
  gap: clamp(30px, 6vw, 92px);
  align-items: center;
  padding: 112px clamp(22px, 5vw, 70px) 74px;
  color: var(--white);
  background: var(--night);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 78% 48%, rgba(70, 150, 255, .17), transparent 31%),
    radial-gradient(circle at 68% 18%, rgba(255, 255, 255, .08), transparent 25%),
    linear-gradient(115deg, #000 0%, #08090b 46%, #1d1d1f 100%);
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 92px 92px;
  mask-image: radial-gradient(circle at 68% 45%, black, transparent 70%);
  opacity: .32;
}

.hero-copy,
.hero-stage,
.hero-bottom {
  position: relative;
  z-index: 2;
}

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

.eyebrow {
  margin: 0 0 18px;
  color: #9ee4d7;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0;
  font-weight: 600;
}

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

h1 {
  max-width: 850px;
  margin-bottom: 24px;
  font-size: clamp(64px, 8.1vw, 122px);
  line-height: .98;
  font-weight: 700;
}

.hero-title-line {
  display: block;
  white-space: nowrap;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(40px, 5.6vw, 76px);
  line-height: 1.03;
  font-weight: 680;
  text-wrap: balance;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(21px, 2.2vw, 30px);
  line-height: 1.12;
  font-weight: 660;
}

.hero-lede,
.section-heading > p,
.contact-copy p,
.optician-copy p {
  max-width: 660px;
  color: rgba(255, 253, 247, .72);
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.42;
}

.hero-status {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.hero-status span {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 999px;
  color: rgba(255, 253, 247, .72);
  background: rgba(255, 255, 255, .055);
  font-size: 12px;
  font-weight: 600;
}

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

.button {
  position: relative;
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, .24);
  border-radius: 999px;
  font-weight: 650;
  overflow: hidden;
  transition: transform .2s var(--ease), background .2s ease, border-color .2s ease, box-shadow .2s ease;
}

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

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

.button.primary:hover {
  box-shadow: 0 14px 38px rgba(158, 228, 215, .28);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, .06);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, .14);
  border-color: rgba(255, 255, 255, .4);
}

.hero-stage {
  min-height: min(58vw, 650px);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.hero-stage::before {
  content: "";
  position: absolute;
  left: 10%;
  right: -8%;
  bottom: 1%;
  height: 22%;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(0, 0, 0, .46), transparent 66%);
  filter: blur(10px);
}

.hero-photo-frame {
  position: absolute;
  inset: -5% -18% 14% -8%;
  z-index: 1;
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  background: #06080d;
  box-shadow: 0 48px 130px rgba(0, 0, 0, .42);
  transform: translateY(-8px);
}

.hero-photo-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 8, 14, .38), rgba(5, 8, 14, .04) 36%, rgba(5, 8, 14, .3) 100%),
    linear-gradient(0deg, rgba(5, 8, 14, .26), transparent 34%, rgba(5, 8, 14, .24));
  pointer-events: none;
}

.hero-product-photo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% 50%;
  transform: scale(1.03);
  filter: saturate(.74) contrast(1.05) brightness(.97);
}

.hero-film-edge {
  position: absolute;
  left: 24%;
  top: 24%;
  width: 30%;
  height: 42%;
  border-radius: 46% 40% 44% 38%;
  background: linear-gradient(122deg, rgba(255, 255, 255, .1), transparent 54%);
  transform: rotate(-5deg);
  opacity: .42;
  mix-blend-mode: screen;
  pointer-events: none;
}

.product-plinth {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: -2%;
  z-index: 3;
  min-height: 27%;
  padding: clamp(22px, 3.2vw, 38px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 18px;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 8px;
  background:
    linear-gradient(100deg, rgba(255, 255, 255, .97), rgba(242, 244, 248, .94)),
    radial-gradient(circle at 74% 24%, rgba(0, 113, 227, .14), transparent 36%);
  color: var(--ink);
  box-shadow: 0 46px 112px rgba(0, 0, 0, .31), var(--hair-shadow);
  transform: perspective(1200px) rotateX(8deg) rotateY(-8deg) translateY(20px);
}

.plinth-line {
  position: absolute;
  left: 28px;
  right: 28px;
  top: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(23, 21, 19, .26), transparent);
}

.plinth-title {
  color: var(--muted);
  font-size: clamp(11px, 1.2vw, 15px);
  letter-spacing: 0;
  text-transform: uppercase;
}

.product-plinth img {
  width: min(420px, 72%);
  height: auto;
  mix-blend-mode: multiply;
}

.plinth-claims {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.plinth-claims span,
.hero-bottom span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid rgba(23, 21, 19, .14);
  border-radius: 999px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0;
}

.hero-bottom {
  position: absolute;
  left: clamp(22px, 5vw, 70px);
  right: clamp(22px, 5vw, 70px);
  bottom: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-bottom span {
  color: rgba(255, 253, 247, .74);
  border-color: rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .05);
}

.signal-strip {
  padding: 34px 22px;
  text-align: center;
  border-block: 1px solid var(--line);
  background: var(--paper);
}

.signal-strip p {
  width: min(var(--max), 100%);
  margin: 0 auto;
  color: var(--ink);
  font-size: clamp(20px, 2.6vw, 34px);
  font-weight: 680;
}

.positioning {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: clamp(28px, 5vw, 74px);
  align-items: start;
  padding: clamp(86px, 9vw, 138px) 0 0;
}

.positioning-copy {
  position: sticky;
  top: 116px;
}

.positioning-copy .eyebrow {
  color: var(--clear);
}

.positioning-copy p {
  max-width: 650px;
  color: var(--muted);
  font-size: clamp(17px, 1.8vw, 21px);
}

.positioning-points {
  display: grid;
  gap: 14px;
}

.positioning-points article,
.intelligence-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 86% 12%, rgba(0, 113, 227, .055), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, .92), rgba(255, 255, 255, .66));
  padding: clamp(24px, 3vw, 34px);
  box-shadow: var(--soft-shadow), var(--hair-shadow);
}

.positioning-points span,
.intelligence-grid span {
  display: inline-flex;
  margin-bottom: 24px;
  color: var(--clear);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: uppercase;
}

.positioning-points p,
.intelligence-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.system {
  padding: clamp(92px, 11vw, 152px) 0;
}

.section-heading {
  max-width: 920px;
  margin: 0 auto 50px;
  text-align: center;
}

.section-heading .eyebrow,
.proof .eyebrow,
.optician-copy .eyebrow,
.contact-copy .eyebrow {
  color: var(--clear);
}

.section-heading > p,
.optician-copy p,
.contact-copy p {
  color: var(--muted);
}

.system-grid {
  display: grid;
  grid-template-columns: minmax(0, .94fr) minmax(340px, 1.12fr) minmax(0, .94fr);
  gap: 16px;
  align-items: stretch;
}

.layer-card,
.proof-grid article,
.optician-panel article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 86% 12%, rgba(0, 113, 227, .06), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, .92), rgba(255, 253, 247, .62));
  padding: clamp(24px, 3vw, 36px);
  box-shadow: 0 20px 58px rgba(0, 0, 0, .06), var(--hair-shadow);
}

.layer-index,
.proof-grid span {
  display: inline-flex;
  margin-bottom: 34px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
}

.layer-card p,
.layer-card li,
.proof-grid p,
.optician-panel p,
.fine-print,
.footer-brand p {
  color: var(--muted);
}

.layer-card ul {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.layer-card li {
  position: relative;
  padding-left: 25px;
}

.layer-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--clear);
}

.lens-stack {
  position: relative;
  min-height: 620px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 12%, rgba(255, 255, 255, .98), transparent 26%),
    radial-gradient(circle at 72% 24%, rgba(0, 113, 227, .115), transparent 34%),
    radial-gradient(circle at 26% 74%, rgba(10, 123, 104, .085), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f7f8fb 54%, #eef2f7 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .82),
    0 38px 104px rgba(0, 0, 0, .105);
}

.lens-stack::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 0 22%, rgba(255, 255, 255, .7) 36%, transparent 48%),
    linear-gradient(180deg, rgba(255, 255, 255, .34), transparent 42%, rgba(0, 0, 0, .025));
  opacity: .62;
  pointer-events: none;
}

.lens-stack::before {
  content: "";
  position: absolute;
  left: 20%;
  right: 20%;
  bottom: 15%;
  height: 20%;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(54, 78, 112, .22), transparent 68%);
  filter: blur(14px);
}

.stack-kicker {
  position: absolute;
  z-index: 4;
  left: 24px;
  top: 24px;
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding: 0 12px;
  border: 1px solid rgba(0, 0, 0, .08);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, .68);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: uppercase;
  backdrop-filter: blur(16px) saturate(140%);
}

.stack-visual {
  position: absolute;
  inset: 82px 32px 178px;
  z-index: 2;
  perspective: 1100px;
  transform-style: preserve-3d;
}

.stack-rim {
  position: absolute;
  left: 50%;
  top: 28%;
  width: min(88%, 448px);
  height: 36%;
  transform: translateX(-50%) rotateX(62deg) rotateZ(-11deg);
  border: 1px solid rgba(29, 29, 31, .12);
  border-radius: 48% 48% 50% 50% / 42% 42% 58% 58%;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(255, 255, 255, .48), transparent 66%),
    repeating-linear-gradient(90deg, rgba(0, 113, 227, .10) 0 1px, transparent 1px 18px);
  box-shadow:
    inset 0 0 0 10px rgba(255, 255, 255, .24),
    0 22px 42px rgba(41, 70, 104, .08);
}

.stack-rim::before {
  content: "";
  position: absolute;
  inset: 8%;
  border: 1px solid rgba(0, 113, 227, .26);
  border-radius: inherit;
}

.stack-axis {
  position: absolute;
  left: 50%;
  top: 11%;
  width: 1px;
  height: 70%;
  transform: translateX(-50%) rotate(-12deg);
  background: linear-gradient(180deg, transparent, rgba(0, 113, 227, .28), rgba(10, 123, 104, .24), transparent);
}

.stack-axis::before,
.stack-axis::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  transform: translateX(-50%);
  background: rgba(0, 113, 227, .64);
  box-shadow: 0 0 0 6px rgba(0, 113, 227, .08);
}

.stack-axis::before {
  top: 9%;
}

.stack-axis::after {
  bottom: 9%;
  background: rgba(10, 123, 104, .64);
  box-shadow: 0 0 0 6px rgba(10, 123, 104, .08);
}

.stack-sheet {
  position: absolute;
  left: 50%;
  width: min(78%, 390px);
  height: 28%;
  border-radius: 48% 48% 50% 50% / 42% 42% 58% 58%;
  transform: translateX(-50%) rotateX(64deg) rotateZ(-11deg);
  transform-origin: center;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .82),
    inset 0 -18px 36px rgba(33, 64, 96, .08),
    0 34px 62px rgba(31, 42, 64, .15);
  isolation: isolate;
}

.stack-sheet::before {
  content: "";
  position: absolute;
  inset: 7%;
  z-index: -1;
  border-radius: inherit;
  background:
    linear-gradient(116deg, rgba(255, 255, 255, .86), transparent 35%, rgba(255, 255, 255, .46) 62%, transparent 78%);
  opacity: .72;
}

.sheet-clear {
  top: 4%;
  color: #055b51;
  border: 1px solid rgba(10, 123, 104, .44);
  background:
    radial-gradient(ellipse at 34% 22%, rgba(255, 255, 255, .74), transparent 44%),
    linear-gradient(135deg, rgba(20, 189, 159, .20), rgba(255, 255, 255, .58));
}

.sheet-lens {
  top: 31%;
  width: min(84%, 420px);
  height: 31%;
  color: #273745;
  border: 1px solid rgba(70, 112, 150, .30);
  background:
    radial-gradient(ellipse at 38% 18%, rgba(255, 255, 255, .92), transparent 42%),
    linear-gradient(145deg, rgba(255, 255, 255, .72), rgba(219, 233, 244, .62));
  box-shadow:
    inset 0 0 34px rgba(0, 113, 227, .10),
    inset 0 -18px 40px rgba(41, 70, 104, .08),
    0 34px 66px rgba(31, 42, 64, .14);
}

.sheet-fog {
  top: 60%;
  color: #165675;
  border: 1px solid rgba(43, 121, 173, .38);
  background:
    radial-gradient(ellipse at 36% 24%, rgba(255, 255, 255, .74), transparent 42%),
    linear-gradient(135deg, rgba(43, 160, 214, .17), rgba(255, 255, 255, .54));
}

.sheet-clear::after,
.sheet-fog::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  top: 48%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .92), transparent);
  opacity: .72;
}

.stack-callouts {
  position: absolute;
  z-index: 5;
  inset: 82px 26px 96px;
  pointer-events: none;
}

.stack-callout {
  position: absolute;
  display: grid;
  gap: 4px;
  width: min(42%, 210px);
  padding: 12px 14px;
  border: 1px solid rgba(0, 0, 0, .08);
  border-radius: 8px;
  color: var(--ink);
  background: rgba(255, 255, 255, .78);
  box-shadow: 0 16px 40px rgba(31, 42, 64, .11), var(--hair-shadow);
  backdrop-filter: blur(18px) saturate(160%);
}

.stack-callout::before {
  content: "";
  position: absolute;
  top: 50%;
  width: 46px;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 113, 227, .34), transparent);
}

.stack-callout span {
  font-size: 13px;
  line-height: 1.12;
  font-weight: 700;
}

.stack-callout small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
  font-weight: 500;
}

.callout-clear {
  left: 0;
  top: 1%;
}

.callout-clear::before,
.callout-fog::before {
  left: 100%;
}

.callout-lens {
  right: 0;
  top: 38%;
}

.callout-lens::before {
  right: 100%;
  transform: rotate(180deg);
}

.callout-fog {
  left: 4%;
  bottom: 4%;
}

.stack-legend {
  position: absolute;
  z-index: 4;
  left: 24px;
  right: 24px;
  bottom: 78px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.stack-metrics {
  position: absolute;
  z-index: 4;
  left: 24px;
  right: 24px;
  bottom: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.stack-metrics span {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border-radius: 8px;
  color: rgba(29, 29, 31, .76);
  background: rgba(255, 255, 255, .82);
  box-shadow: 0 12px 28px rgba(31, 42, 64, .08), var(--hair-shadow);
  font-size: 11px;
  font-weight: 700;
  text-align: center;
  backdrop-filter: blur(16px) saturate(140%);
}

.stack-legend span {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  border: 1px solid rgba(0, 0, 0, .08);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, .62);
  font-size: 11px;
  font-weight: 500;
  text-align: center;
  backdrop-filter: blur(16px) saturate(140%);
}

/* ---------- before / after feature proof ---------- */
.feature-showcase {
  color: var(--ink);
  background:
    radial-gradient(circle at 74% 6%, rgba(0, 113, 227, .06), transparent 30%),
    radial-gradient(circle at 18% 32%, rgba(0, 0, 0, .035), transparent 28%),
    linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 72%, #ffffff 100%);
  border-block: 1px solid var(--line);
}

.feature-showcase-inner {
  padding: clamp(90px, 10vw, 150px) 0;
}

.feature-heading {
  margin-bottom: clamp(38px, 6vw, 74px);
}

.comparison-list {
  display: grid;
  gap: 18px;
}

.comparison-card {
  display: grid;
  grid-template-columns: minmax(270px, .68fr) minmax(0, 1.32fr);
  gap: clamp(24px, 4vw, 58px);
  align-items: center;
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid rgba(0, 0, 0, .07);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 92% 12%, rgba(0, 113, 227, .055), transparent 32%),
    linear-gradient(180deg, rgba(255, 255, 255, .97), rgba(255, 255, 255, .78));
  box-shadow: 0 30px 86px rgba(0, 0, 0, .075), var(--hair-shadow);
}

.comparison-copy {
  max-width: 430px;
}

.feature-index {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--clear);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.comparison-copy h3 {
  font-size: clamp(32px, 4.15vw, 58px);
  letter-spacing: 0;
  max-width: 9.2em;
}

.comparison-copy p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(16px, 1.55vw, 19px);
}

.photo-proof-list {
  gap: clamp(18px, 3vw, 26px);
}

.photo-proof-card {
  grid-template-columns: minmax(260px, .54fr) minmax(0, 1.46fr);
}

.photo-proof {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, .08);
  border-radius: 10px;
  background: #11151b;
  box-shadow:
    0 32px 82px rgba(0, 0, 0, .17),
    inset 0 1px 0 rgba(255, 255, 255, .22);
  isolation: isolate;
}

.photo-proof::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, .06), rgba(0, 0, 0, .24)),
    radial-gradient(circle at 74% 28%, rgba(65, 170, 220, .12), transparent 36%);
  pointer-events: none;
}

.photo-proof img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.92) contrast(1.04);
}

.photo-label {
  position: absolute;
  z-index: 2;
  top: 18px;
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, .34);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0;
  box-shadow: 0 12px 28px rgba(0, 0, 0, .18);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.photo-label.before {
  left: 18px;
  color: #f5f5f7;
  background: rgba(20, 22, 26, .58);
}

.photo-label.after {
  right: 18px;
  color: #ffffff;
  background: rgba(0, 113, 227, .88);
}

.photo-divider {
  position: absolute;
  z-index: 2;
  top: 13%;
  bottom: 16%;
  left: 50%;
  width: 2px;
  background:
    linear-gradient(180deg, transparent, rgba(255, 255, 255, .70), transparent),
    linear-gradient(180deg, transparent, rgba(0, 113, 227, .45), transparent);
  opacity: .78;
}

.photo-proof figcaption {
  position: absolute;
  z-index: 2;
  left: 18px;
  right: 18px;
  bottom: 16px;
  margin: 0;
  color: rgba(245, 245, 247, .82);
  font-size: 12px;
  line-height: 1.45;
  letter-spacing: 0;
  text-shadow: 0 2px 12px rgba(0, 0, 0, .38);
}

.comparison-visual {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  min-width: 0;
}

.comparison-frame {
  position: relative;
  min-height: 356px;
  margin: 0;
  padding: 18px 18px 54px;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, .095);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 255, 255, .96), transparent 44%),
    linear-gradient(180deg, #ffffff 0%, #f2f5f9 58%, #e8eef6 100%);
}

.comparison-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, rgba(255, 255, 255, .75), transparent 34%),
    radial-gradient(circle at 80% 90%, rgba(0, 113, 227, .08), transparent 32%);
  pointer-events: none;
}

.comparison-label {
  position: relative;
  z-index: 4;
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding: 0 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .74);
  color: var(--ink);
  font-size: 12px;
  font-weight: 780;
  letter-spacing: 0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .08);
}

.is-after .comparison-label {
  color: #ffffff;
  background: var(--clear);
}

.glasses-scene {
  position: absolute;
  inset: 10px 8px 50px;
  display: grid;
  place-items: center;
  perspective: 900px;
  overflow: hidden;
}

.glasses-scene::after {
  content: "";
  position: absolute;
  left: 16%;
  right: 16%;
  bottom: 13%;
  height: 22px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(0, 0, 0, .20), transparent 73%);
  filter: blur(9px);
}

.eyeglasses {
  position: relative;
  z-index: 2;
  width: min(96%, 430px);
  aspect-ratio: 3.15 / 1;
  transform: rotate(-.5deg) rotateX(1deg);
  filter: drop-shadow(0 18px 22px rgba(0, 0, 0, .18));
}

.eyeglasses .lens {
  position: absolute;
  top: 13%;
  width: 41%;
  height: 76%;
  overflow: hidden;
  border: 12px solid #080808;
  background:
    radial-gradient(circle at 24% 16%, rgba(255, 255, 255, .92), transparent 22%),
    linear-gradient(132deg, rgba(255, 255, 255, .78), rgba(218, 231, 239, .42) 46%, rgba(255, 255, 255, .28));
  background:
    linear-gradient(180deg, #1f2020 0%, #050505 55%, #171818 100%) border-box,
    radial-gradient(circle at 24% 16%, rgba(255, 255, 255, .92), transparent 22%) padding-box,
    linear-gradient(132deg, rgba(255, 255, 255, .78), rgba(218, 231, 239, .42) 46%, rgba(255, 255, 255, .28)) padding-box;
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, .10),
    inset 0 0 0 8px rgba(0, 0, 0, .06),
    inset 0 -18px 28px rgba(0, 0, 0, .05),
    inset 0 4px 4px rgba(255, 255, 255, .28),
    0 2px 0 rgba(255, 255, 255, .22),
    0 16px 32px rgba(0, 0, 0, .20);
  isolation: isolate;
}

.eyeglasses .lens.left {
  left: 1.5%;
  border-radius: 20% 33% 34% 25% / 18% 22% 38% 42%;
  clip-path: polygon(6% 16%, 15% 10%, 54% 8%, 88% 14%, 96% 24%, 93% 70%, 83% 88%, 57% 96%, 22% 90%, 9% 76%, 2% 30%);
}

.eyeglasses .lens.right {
  right: 1.5%;
  border-radius: 33% 20% 25% 34% / 22% 18% 42% 38%;
  clip-path: polygon(4% 24%, 12% 14%, 46% 8%, 85% 10%, 94% 16%, 98% 30%, 91% 76%, 78% 90%, 43% 96%, 17% 88%, 7% 70%);
}

.eyeglasses .lens::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    linear-gradient(130deg, rgba(255, 255, 255, .46), transparent 30%, rgba(255, 255, 255, .12) 58%, transparent 72%),
    radial-gradient(circle at 62% 76%, rgba(0, 113, 227, .06), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, .24), rgba(255, 255, 255, 0) 34%);
  opacity: .86;
  pointer-events: none;
}

.eyeglasses .lens.has-film::before {
  inset: 0;
  z-index: 2;
  border: 1px solid rgba(0, 113, 227, .45);
  background:
    linear-gradient(128deg, rgba(255, 255, 255, .55), transparent 35%, rgba(0, 113, 227, .10) 70%),
    radial-gradient(circle at 72% 22%, rgba(0, 113, 227, .18), transparent 30%),
    linear-gradient(180deg, rgba(0, 113, 227, .06), rgba(255, 255, 255, .02));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, .52),
    inset 0 0 0 7px rgba(0, 113, 227, .055),
    inset 0 -10px 22px rgba(0, 113, 227, .06),
    0 0 18px rgba(0, 113, 227, .12);
  opacity: 1;
}

.eyeglasses .lens.has-film::after {
  content: "";
  position: absolute;
  left: 7%;
  right: 7%;
  top: 12%;
  height: 2px;
  z-index: 4;
  border-radius: 999px;
  background:
    linear-gradient(90deg, transparent, rgba(255, 255, 255, .95), transparent),
    linear-gradient(90deg, transparent, rgba(0, 113, 227, .40), transparent);
  transform: rotate(-13deg);
  opacity: .82;
}

.eyeglasses .bridge {
  position: absolute;
  top: 35%;
  left: 39%;
  width: 22%;
  height: 25%;
  z-index: 5;
  background:
    radial-gradient(ellipse at 50% 10%, rgba(255, 255, 255, .22), transparent 38%),
    linear-gradient(90deg, #0a0a0a, #242525 46%, #050505 100%);
  clip-path: polygon(0 10%, 19% 2%, 37% 16%, 44% 48%, 56% 48%, 63% 16%, 81% 2%, 100% 10%, 92% 42%, 70% 54%, 61% 88%, 39% 88%, 30% 54%, 8% 42%);
  filter: drop-shadow(0 3px 5px rgba(0, 0, 0, .34));
}

.eyeglasses .bridge::after {
  content: "";
  position: absolute;
  left: 28%;
  right: 28%;
  top: 6%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .42), transparent);
  border-radius: 999px;
}

.eyeglasses .lens.left::marker,
.eyeglasses .lens.right::marker {
  display: none;
}

.eyeglasses .lens.left + .bridge::before {
  content: "";
  position: absolute;
  left: -250%;
  top: -36%;
  width: 18px;
  height: 44px;
  z-index: 3;
}

.eyeglasses::before,
.eyeglasses::after {
  content: "";
  position: absolute;
  top: 25%;
  width: 20px;
  height: 56px;
  border-radius: 7px;
  background:
    radial-gradient(circle at 50% 24%, #dfe3e7 0 2px, #5e6266 3px, transparent 5px),
    radial-gradient(circle at 50% 72%, #dfe3e7 0 2px, #5e6266 3px, transparent 5px),
    linear-gradient(180deg, #1e1f20, #050505 58%, #1a1b1b);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .24),
    inset 0 -1px 0 rgba(0, 0, 0, .65),
    0 4px 10px rgba(0, 0, 0, .24);
  z-index: 4;
}

.eyeglasses::before {
  left: 0;
  transform: rotate(-6deg);
}

.eyeglasses::after {
  right: 0;
  transform: rotate(6deg);
}

.eyeglasses .lens:not(.has-film)::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: inherit;
  pointer-events: none;
}

.has-water-sheet::after {
  background:
    radial-gradient(circle at 22% 24%, rgba(255, 255, 255, .96) 0 5px, rgba(115, 140, 158, .25) 6px, transparent 10px),
    radial-gradient(circle at 42% 30%, rgba(255, 255, 255, .94) 0 3px, rgba(115, 140, 158, .24) 4px, transparent 7px),
    radial-gradient(circle at 70% 52%, rgba(255, 255, 255, .88) 0 6px, rgba(115, 140, 158, .22) 7px, transparent 11px),
    radial-gradient(circle at 30% 70%, rgba(255, 255, 255, .90) 0 4px, rgba(115, 140, 158, .20) 5px, transparent 9px),
    linear-gradient(96deg, rgba(255, 255, 255, .20), rgba(165, 198, 218, .54) 26%, rgba(238, 247, 252, .76) 54%, rgba(170, 205, 226, .42) 72%, rgba(255, 255, 255, .18)),
    repeating-linear-gradient(102deg, rgba(255, 255, 255, .20) 0 1px, transparent 2px 15px);
  box-shadow: inset 0 0 22px rgba(118, 151, 176, .34);
  opacity: .96;
}

.has-rain::after,
.has-water-beads::after {
  background-image:
    radial-gradient(circle at 20% 28%, rgba(255, 255, 255, .96) 0 5px, rgba(78, 112, 134, .24) 6px, transparent 10px),
    radial-gradient(circle at 38% 56%, rgba(255, 255, 255, .92) 0 4px, rgba(78, 112, 134, .22) 5px, transparent 8px),
    radial-gradient(circle at 64% 34%, rgba(255, 255, 255, .94) 0 6px, rgba(78, 112, 134, .20) 7px, transparent 12px),
    radial-gradient(circle at 76% 67%, rgba(255, 255, 255, .88) 0 3px, rgba(78, 112, 134, .20) 4px, transparent 7px),
    linear-gradient(135deg, rgba(255, 255, 255, .12), rgba(214, 234, 248, .10));
  opacity: .82;
}

.has-water-beads::after {
  inset: 8px;
  z-index: 5;
  opacity: .80;
  filter: drop-shadow(0 2px 2px rgba(30, 70, 100, .22));
}

.has-fog::after {
  background:
    radial-gradient(ellipse at 34% 42%, rgba(255, 255, 255, .98), rgba(236, 241, 246, .90) 45%, transparent 72%),
    radial-gradient(ellipse at 70% 48%, rgba(255, 255, 255, .92), rgba(226, 234, 241, .72) 44%, transparent 72%),
    radial-gradient(rgba(255, 255, 255, .70) 1px, transparent 2px) 0 0 / 8px 8px,
    linear-gradient(180deg, rgba(225, 233, 240, .82), rgba(244, 248, 252, .72));
  filter: blur(.2px) saturate(.74);
  opacity: .95;
}

.has-soft-glow {
  background:
    radial-gradient(circle at 50% 40%, rgba(255, 255, 255, .82), transparent 36%),
    linear-gradient(135deg, rgba(255, 255, 255, .70), rgba(222, 238, 248, .36));
}

.has-scratches::after,
.has-scratches.light::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  border-radius: inherit;
  background:
    linear-gradient(28deg, transparent 18%, rgba(58, 62, 66, .42) 18.5%, rgba(255, 255, 255, .38) 19%, transparent 20.2%),
    linear-gradient(136deg, transparent 35%, rgba(62, 66, 70, .32) 35.4%, rgba(255, 255, 255, .34) 35.9%, transparent 37%),
    linear-gradient(164deg, transparent 60%, rgba(60, 64, 68, .26) 60.4%, transparent 61.3%),
    linear-gradient(112deg, transparent 24%, rgba(80, 84, 88, .16) 24.3%, transparent 25.2%),
    radial-gradient(ellipse at 45% 55%, rgba(255, 255, 255, .18), transparent 54%);
  mix-blend-mode: multiply;
  opacity: .78;
}

.has-shield {
  background:
    radial-gradient(circle at 50% 44%, rgba(0, 113, 227, .13), transparent 42%),
    linear-gradient(135deg, rgba(255, 255, 255, .70), rgba(220, 238, 248, .38));
}

.has-fingerprint::after,
.has-smudge::after {
  content: "";
  position: absolute;
  inset: 14px;
  z-index: 4;
  border-radius: inherit;
  background:
    repeating-radial-gradient(ellipse at 42% 52%, rgba(65, 68, 72, .30) 0 1px, transparent 2px 6px),
    radial-gradient(ellipse at 42% 52%, rgba(110, 110, 115, .26), transparent 58%),
    radial-gradient(ellipse at 70% 46%, rgba(110, 110, 115, .18), transparent 36%);
  transform: rotate(-14deg);
  filter: blur(.25px);
  opacity: .86;
}

.has-smudge::after {
  border-radius: inherit;
  background: radial-gradient(ellipse at 52% 50%, rgba(110, 110, 115, .30), transparent 58%);
  filter: blur(2px);
}

.has-wipe {
  background:
    linear-gradient(112deg, transparent 0 34%, rgba(255, 255, 255, .82) 45%, transparent 56%),
    linear-gradient(135deg, rgba(255, 255, 255, .70), rgba(220, 238, 248, .38));
}

.comparison-frame figcaption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 16px;
  z-index: 4;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.32;
}

/* Photographic front-frame system.
   The frame itself is a project asset; the spans below are lens-surface masks. */
.eyeglasses {
  width: min(111%, 520px);
  aspect-ratio: 1520 / 600;
  transform: none;
  background: url("assets/front-frame-reference-transparent.png") center / contain no-repeat;
  filter:
    drop-shadow(0 20px 22px rgba(28, 38, 50, .12))
    drop-shadow(0 5px 8px rgba(0, 0, 0, .08));
}

.eyeglasses::before,
.eyeglasses::after,
.eyeglasses .bridge,
.eyeglasses .bridge::after,
.eyeglasses .lens.left + .bridge::before {
  display: none;
}

.eyeglasses .lens {
  top: 17.2%;
  width: 31.2%;
  height: 60.5%;
  overflow: hidden;
  border: 0;
  background: transparent;
  box-shadow: none;
  isolation: isolate;
}

.eyeglasses .lens.left {
  left: 12.4%;
  border-radius: 22% 25% 33% 28% / 18% 20% 35% 38%;
  clip-path: polygon(8% 8%, 42% 1%, 82% 6%, 97% 18%, 94% 70%, 78% 92%, 28% 96%, 8% 80%, 1% 24%);
}

.eyeglasses .lens.right {
  right: 12.7%;
  border-radius: 25% 22% 28% 33% / 20% 18% 38% 35%;
  clip-path: polygon(3% 18%, 18% 6%, 58% 1%, 92% 8%, 99% 24%, 92% 80%, 72% 96%, 22% 92%, 6% 70%);
}

.eyeglasses .lens::before {
  inset: 0;
  z-index: 1;
  border-radius: inherit;
  background:
    linear-gradient(125deg, rgba(255, 255, 255, .38), transparent 28%, rgba(255, 255, 255, .08) 58%, transparent 74%),
    radial-gradient(ellipse at 58% 70%, rgba(0, 113, 227, .035), transparent 44%),
    linear-gradient(180deg, rgba(250, 252, 255, .26), rgba(226, 236, 246, .08));
  opacity: .76;
}

.eyeglasses .lens::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: inherit;
  pointer-events: none;
}

.eyeglasses .lens.has-film::before {
  inset: 0;
  z-index: 2;
  border: 1.7px solid rgba(52, 188, 228, .68);
  background:
    linear-gradient(124deg, rgba(255, 255, 255, .34), transparent 34%, rgba(40, 160, 220, .15) 74%),
    radial-gradient(ellipse at 72% 22%, rgba(40, 160, 220, .20), transparent 36%),
    linear-gradient(180deg, rgba(40, 160, 220, .075), rgba(255, 255, 255, .025));
  box-shadow:
    inset 0 0 0 5px rgba(40, 160, 220, .055),
    inset 0 0 28px rgba(0, 113, 227, .12),
    0 0 12px rgba(0, 113, 227, .14);
  opacity: 1;
}

.eyeglasses .lens.has-film::after {
  left: 7%;
  right: 7%;
  top: 11%;
  bottom: auto;
  height: 2px;
  z-index: 5;
  background:
    linear-gradient(90deg, transparent, rgba(255, 255, 255, .96), transparent),
    linear-gradient(90deg, transparent, rgba(40, 160, 220, .54), transparent);
  transform: rotate(-12deg);
  opacity: .86;
}

.eyeglasses .lens.has-water-sheet::after {
  background:
    radial-gradient(circle at 18% 24%, rgba(255, 255, 255, .98) 0 5px, rgba(80, 115, 140, .30) 6px, transparent 10px),
    radial-gradient(circle at 34% 34%, rgba(255, 255, 255, .94) 0 3px, rgba(80, 115, 140, .26) 4px, transparent 8px),
    radial-gradient(circle at 62% 48%, rgba(255, 255, 255, .96) 0 7px, rgba(80, 115, 140, .24) 8px, transparent 13px),
    radial-gradient(circle at 76% 68%, rgba(255, 255, 255, .90) 0 4px, rgba(80, 115, 140, .22) 5px, transparent 10px),
    linear-gradient(96deg, rgba(255, 255, 255, .12), rgba(122, 176, 210, .58) 24%, rgba(240, 247, 252, .84) 55%, rgba(142, 189, 220, .50) 76%, rgba(255, 255, 255, .14)),
    repeating-linear-gradient(103deg, rgba(255, 255, 255, .28) 0 1px, transparent 2px 13px);
  box-shadow: inset 0 0 32px rgba(80, 124, 155, .36);
  opacity: .97;
}

.eyeglasses .lens.has-rain::after {
  background:
    radial-gradient(circle at 24% 30%, rgba(255, 255, 255, .97) 0 5px, rgba(80, 115, 140, .25) 6px, transparent 10px),
    radial-gradient(circle at 50% 24%, rgba(255, 255, 255, .92) 0 3px, rgba(80, 115, 140, .22) 4px, transparent 8px),
    radial-gradient(circle at 72% 52%, rgba(255, 255, 255, .94) 0 6px, rgba(80, 115, 140, .22) 7px, transparent 11px),
    linear-gradient(112deg, rgba(235, 247, 255, .28), rgba(150, 196, 224, .22));
  opacity: .90;
}

.eyeglasses .lens.has-film.has-water-beads::after {
  inset: 7%;
  height: auto;
  left: 7%;
  right: 7%;
  top: 7%;
  bottom: 7%;
  transform: none;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, .97) 0 4px, rgba(60, 120, 160, .24) 5px, transparent 9px),
    radial-gradient(circle at 45% 58%, rgba(255, 255, 255, .94) 0 3px, rgba(60, 120, 160, .20) 4px, transparent 7px),
    radial-gradient(circle at 70% 34%, rgba(255, 255, 255, .95) 0 5px, rgba(60, 120, 160, .20) 6px, transparent 11px);
  filter: drop-shadow(0 2px 2px rgba(30, 70, 100, .20));
  opacity: .82;
}

.eyeglasses .lens.has-fog::after {
  background:
    radial-gradient(ellipse at 28% 38%, rgba(255, 255, 255, 1), rgba(226, 235, 244, .99) 42%, transparent 72%),
    radial-gradient(ellipse at 72% 50%, rgba(255, 255, 255, .99), rgba(214, 226, 238, .96) 46%, transparent 76%),
    radial-gradient(ellipse at 48% 76%, rgba(190, 208, 224, .82), transparent 58%),
    radial-gradient(rgba(255, 255, 255, .78) 1px, transparent 2px) 0 0 / 6px 6px,
    linear-gradient(180deg, rgba(200, 214, 228, .98), rgba(250, 252, 254, .92));
  box-shadow: inset 0 0 30px rgba(140, 162, 184, .42);
  filter: blur(.7px) saturate(.46);
  opacity: 1;
}

.fog-state .is-before .eyeglasses .lens::before {
  opacity: .22;
}

.eyeglasses .lens.has-scratches::after,
.eyeglasses .lens.has-scratches.light::after {
  background:
    linear-gradient(26deg, transparent 19.8%, rgba(45, 48, 52, .32) 20%, rgba(255, 255, 255, .42) 20.12%, transparent 20.48%),
    linear-gradient(134deg, transparent 35.1%, rgba(55, 58, 62, .29) 35.26%, rgba(255, 255, 255, .34) 35.41%, transparent 35.78%),
    linear-gradient(160deg, transparent 58.8%, rgba(62, 66, 70, .22) 59%, transparent 59.34%),
    linear-gradient(104deg, transparent 25.4%, rgba(80, 84, 88, .18) 25.56%, transparent 25.90%),
    linear-gradient(47deg, transparent 68%, rgba(70, 74, 78, .19) 68.16%, transparent 68.44%),
    repeating-linear-gradient(118deg, transparent 0 20px, rgba(70, 74, 78, .055) 21px, transparent 22px 44px),
    radial-gradient(ellipse at 45% 55%, rgba(255, 255, 255, .14), transparent 54%);
  mix-blend-mode: multiply;
  opacity: .76;
}

.eyeglasses .lens.has-fingerprint::after {
  inset: 10%;
  background:
    repeating-radial-gradient(ellipse at 42% 52%, rgba(58, 62, 66, .38) 0 1px, transparent 2px 5px),
    radial-gradient(ellipse at 42% 52%, rgba(96, 100, 106, .32), transparent 58%),
    radial-gradient(ellipse at 70% 46%, rgba(96, 100, 106, .20), transparent 36%);
  transform: rotate(-14deg);
  filter: blur(.25px);
  opacity: .86;
}

.eyeglasses .lens.has-smudge::after {
  inset: 4%;
  background:
    radial-gradient(ellipse at 52% 50%, rgba(78, 82, 88, .34), transparent 58%),
    radial-gradient(ellipse at 32% 64%, rgba(78, 82, 88, .18), transparent 38%),
    linear-gradient(120deg, transparent 20%, rgba(255, 255, 255, .20), transparent 62%);
  filter: blur(2px);
  opacity: .82;
}

.eyeglasses .lens.has-film.is-clear::after,
.eyeglasses .lens.has-film.has-soft-glow::after,
.eyeglasses .lens.has-film.has-shield::after,
.eyeglasses .lens.has-film.has-wipe::after {
  left: 7%;
  right: 7%;
  top: 11%;
  bottom: auto;
  height: 2px;
  transform: rotate(-12deg);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .92), transparent);
  opacity: .78;
}

/* ---------- proof ---------- */
.proof {
  padding: clamp(92px, 10vw, 142px) 0;
}

.proof-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 14px;
}

.proof-lead {
  color: var(--white);
  background:
    radial-gradient(circle at 90% 16%, rgba(0, 113, 227, .22), transparent 35%),
    linear-gradient(135deg, #000, #1d1d1f) !important;
}

.proof-lead p {
  color: rgba(255, 253, 247, .7);
}

.intelligence {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  padding: clamp(88px, 10vw, 148px) 0;
  border-top: 1px solid var(--line);
}

.intelligence-copy .eyebrow {
  color: var(--clear);
}

.intelligence-copy p {
  max-width: 650px;
  color: var(--muted);
  font-size: clamp(17px, 1.8vw, 21px);
}

.intelligence-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.intelligence-grid article {
  min-height: 230px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    radial-gradient(circle at 82% 18%, rgba(0, 113, 227, .10), transparent 34%),
    rgba(255, 255, 255, .76);
}

.opticians {
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  padding: clamp(78px, 9vw, 128px) 0;
}

.optician-panel {
  display: grid;
  gap: 14px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  padding: clamp(86px, 10vw, 138px) 0;
}

.contact-copy p {
  color: var(--muted);
}

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

.contact .button.secondary {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(255, 255, 255, .46);
}

/* ---------- support ---------- */
.support-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 18%, rgba(0, 113, 227, .10), transparent 34%),
    radial-gradient(circle at 78% 8%, rgba(255, 255, 255, .82), transparent 28%),
    linear-gradient(180deg, #f8f8fa 0%, #efeff3 100%);
}

.support-header {
  position: sticky;
}

.support-main {
  padding-top: clamp(34px, 5vw, 72px);
}

.support-hero {
  min-height: calc(100vh - 190px);
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(380px, .74fr);
  gap: clamp(32px, 6vw, 92px);
  align-items: center;
  padding-top: clamp(70px, 9vw, 132px);
  padding-bottom: clamp(74px, 9vw, 128px);
}

.support-intro h1 {
  margin: 0;
  max-width: 700px;
  color: var(--ink);
  font-size: clamp(58px, 8vw, 112px);
  font-weight: 720;
  letter-spacing: -.048em;
  line-height: .98;
}

.support-intro p:not(.eyebrow) {
  max-width: 590px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.42;
}

.support-direct {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.support-direct a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0 15px;
  color: var(--ink);
  border: 1px solid rgba(0, 0, 0, .10);
  border-radius: 999px;
  background: rgba(255, 255, 255, .62);
  box-shadow: var(--hair-shadow);
  font-size: 14px;
  font-weight: 600;
}

.support-form {
  display: grid;
  gap: 18px;
  padding: clamp(24px, 3.6vw, 40px);
  border: 1px solid rgba(0, 0, 0, .10);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .94), rgba(255, 255, 255, .74)),
    rgba(255, 255, 255, .8);
  box-shadow:
    0 38px 120px rgba(0, 0, 0, .14),
    0 1px 0 rgba(255, 255, 255, .82) inset;
  backdrop-filter: blur(22px) saturate(160%);
}

.field {
  display: grid;
  gap: 8px;
}

.field label {
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 650;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid rgba(0, 0, 0, .14);
  border-radius: 12px;
  background: rgba(255, 255, 255, .82);
  color: var(--ink);
  outline: none;
  box-shadow: 0 1px 0 rgba(255, 255, 255, .7) inset;
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}

.field input {
  min-height: 52px;
  padding: 0 15px;
}

.field textarea {
  min-height: 174px;
  resize: vertical;
  padding: 14px 15px;
  line-height: 1.45;
}

.field input:focus,
.field textarea:focus {
  border-color: rgba(0, 113, 227, .62);
  background: var(--white);
  box-shadow:
    0 0 0 4px rgba(0, 113, 227, .12),
    0 1px 0 rgba(255, 255, 255, .7) inset;
}

.support-submit {
  width: 100%;
  min-height: 52px;
  border: 0;
}

.support-submit:disabled {
  cursor: wait;
  opacity: .66;
}

.support-status {
  min-height: 24px;
  margin: 0;
  white-space: pre-wrap;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.support-status[data-tone="success"] {
  color: #0b6b3a;
}

.support-status[data-tone="error"] {
  color: #b42318;
}

.support-status[data-tone="loading"] {
  color: var(--blue);
}

.site-footer {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
  padding: 48px 0 58px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  border-top: 1px solid var(--line);
}

.footer-brand img {
  width: 240px;
  height: 38px;
  object-fit: contain;
  object-position: left center;
  margin-bottom: 16px;
  mix-blend-mode: multiply;
}

.footer-brand p,
.fine-print {
  max-width: 650px;
  margin-bottom: 0;
}

.footer-links {
  display: grid;
  gap: 10px;
  align-content: start;
  color: var(--muted);
}

.fine-print {
  grid-column: 1 / -1;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .desktop-nav,
  .nav-cta {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 112px;
  }

  .hero-stage {
    min-height: 560px;
  }

  .hero-photo-frame {
    inset: 0 -8% 18% -8%;
  }

  .system-grid,
  .proof-grid,
  .positioning,
  .intelligence,
  .intelligence-grid,
  .opticians,
  .contact,
  .support-hero,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .positioning-copy {
    position: static;
  }

  .comparison-card {
    grid-template-columns: 1fr;
  }

  .comparison-copy {
    max-width: 720px;
  }
}

@media (max-width: 680px) {
  .section,
  .site-footer {
    width: min(100% - 28px, var(--max));
  }

  .site-header {
    min-height: 64px;
    padding-inline: 16px;
  }

  .brand-mark {
    width: 26px;
  }

  .brand-word {
    height: 12px;
  }

  .hero {
    padding: 96px 16px 76px;
  }

  h1 {
    font-size: clamp(44px, 13.4vw, 64px);
  }

  .hero-title-line {
    white-space: nowrap;
  }

  h2 {
    font-size: clamp(36px, 11vw, 54px);
  }

  .hero-lede,
  .section-heading > p,
  .contact-copy p,
  .optician-copy p {
    font-size: 17px;
  }

  .hero-actions,
  .contact-actions,
  .support-direct,
  .hero-status {
    flex-direction: column;
    align-items: stretch;
  }

  .support-hero {
    padding-top: 42px;
  }

  .support-form {
    border-radius: 14px;
  }

  .button {
    width: 100%;
  }

  .hero-status span {
    justify-content: center;
  }

  .hero-stage {
    min-height: 430px;
    margin-top: -34px;
  }

  .hero-photo-frame {
    inset: 0 -38% 31% -24%;
    border-radius: 8px;
  }

  .hero-product-photo {
    object-position: 52% 54%;
    transform: scale(1.04);
  }

  .hero-film-edge {
    left: 28%;
    top: 28%;
    width: 32%;
    height: 36%;
  }

  .product-plinth {
    left: 2%;
    right: 2%;
    bottom: 12px;
    min-height: 32%;
    padding: 20px;
    transform: perspective(900px) rotateX(6deg) rotateY(-5deg) translateY(12px);
  }

  .plinth-title {
    letter-spacing: 0;
  }

  .product-plinth img {
    width: 78%;
  }

  .hero-bottom {
    left: 16px;
    right: 16px;
    bottom: 16px;
  }

  .lens-stack {
    min-height: 748px;
  }

  .stack-visual {
    inset: 58px 10px 450px;
  }

  .stack-sheet {
    width: 90%;
  }

  .stack-callouts {
    top: 336px;
    left: 16px;
    right: 16px;
    bottom: 102px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .stack-callout {
    position: relative;
    inset: auto;
    width: 100%;
    max-width: none;
    padding: 10px 12px;
  }

  .stack-callout::before {
    display: none;
  }

  .stack-legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    left: 16px;
    right: 16px;
    bottom: 56px;
  }

  .stack-legend span {
    min-height: 28px;
    padding: 0 4px;
    font-size: 9px;
  }

  .stack-metrics {
    left: 16px;
    right: 16px;
    bottom: 16px;
  }

  .stack-metrics span {
    min-height: 30px;
    padding: 0 4px;
    font-size: 9px;
  }

  .photo-proof-card {
    padding: 18px;
    border-radius: 8px;
  }

  .photo-proof {
    border-radius: 8px;
  }

  .photo-proof img {
    aspect-ratio: 4 / 3;
  }

  .photo-label {
    top: 12px;
    min-height: 30px;
    padding-inline: 11px;
    font-size: 11px;
  }

  .photo-label.before {
    left: 12px;
  }

  .photo-label.after {
    right: 12px;
  }

  .photo-proof figcaption {
    left: 12px;
    right: 12px;
    bottom: 12px;
    font-size: 11px;
  }

  .comparison-visual {
    grid-template-columns: 1fr;
  }

  .comparison-frame {
    min-height: 308px;
    padding: 14px 14px 58px;
  }

  .eyeglasses {
    width: min(111%, 390px);
  }

  .comparison-frame figcaption {
    left: 14px;
    right: 14px;
    bottom: 14px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}