/* ==========================================================================
   Wafertop — wafertop.space
   Design language: near-black canvas, oversized type, electric blue accent,
   numbered facts, hairline rules, generous negative space.
   Brand blue #0056B8 sampled from the official logo; lifted to #3D78FF for
   legibility on black.
   ========================================================================== */

:root {
  --black: #05060a;
  --black-2: #080a10;
  --panel: #0c0f16;
  --panel-2: #11141d;
  --line: rgba(255, 255, 255, 0.10);
  --line-soft: rgba(255, 255, 255, 0.055);
  --white: #ffffff;
  --ink: #e8ecf2;
  --grey: #8b94a4;
  --grey-dim: #5b6473;

  --blue: #3d78ff;
  --blue-deep: #1f4fd8;
  --blue-glow: rgba(61, 120, 255, 0.55);
  --gold: #f0a93b;

  --wrap: 1240px;
  --gutter: 28px;
  --section: 132px;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
  background: var(--black);
}

body {
  margin: 0;
  background: var(--black);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.66;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.028em;
  color: var(--white);
}
p { margin: 0 0 1em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.wrap-tight { max-width: 980px; }

/* ---------- type utilities ---------- */
.kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 26px;
}
.display {
  font-size: clamp(2.3rem, 5.6vw, 4.6rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.02;
}
.display-xl {
  font-size: clamp(2.6rem, 7.2vw, 6.2rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.98;
}
.section-title {
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.032em;
}
.body-lg {
  font-size: clamp(1rem, 1.25vw, 1.12rem);
  color: var(--grey);
  max-width: 60ch;
  line-height: 1.72;
}
.center { text-align: center; }
.center .body-lg, .center .lede { margin-left: auto; margin-right: auto; }

/* breathing room between a heading and the paragraph under it */
.display + .body-lg,
.display + p,
.section-title + .body-lg,
.product-head h2 + .body-lg { margin-top: 26px; }

/* ---------- header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.35s, border-color 0.35s, backdrop-filter 0.35s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(5, 6, 10, 0.82);
  backdrop-filter: saturate(160%) blur(18px);
  border-bottom-color: var(--line-soft);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  height: 82px;
  gap: 40px;
}
.brand img { height: 33px; width: auto; filter: brightness(0) invert(1); }
.brand { flex-shrink: 0; display: block; }

.nav {
  display: flex;
  gap: 34px;
  margin-left: auto;
  align-items: center;
}
.nav a {
  position: relative;
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--grey);
  padding: 6px 0;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--white);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s ease;
}
.nav a:hover { color: var(--white); }
.nav a:hover::after, .nav a.is-active::after { transform: scaleX(1); }
.nav a.is-active { color: var(--white); }

.header-right { display: flex; align-items: center; gap: 22px; margin-left: 34px; }
.lang {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--grey-dim);
  text-transform: uppercase;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 32px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.34);
  color: var(--white);
  background: transparent;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s, color 0.25s;
  white-space: nowrap;
}
.btn:hover { background: var(--white); color: var(--black); border-color: var(--white); }
.btn-solid {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.btn-solid:hover { background: var(--blue-bright, #5a8dff); border-color: #5a8dff; color: #fff; }
.btn-sm { padding: 11px 22px; font-size: 0.66rem; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 160px 0 150px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 620px at 62% 18%, rgba(31, 79, 216, 0.20), transparent 66%),
    radial-gradient(560px 420px at 12% 88%, rgba(61, 120, 255, 0.08), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(circle at 55% 30%, #000 0%, transparent 72%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 2; }
.hero h1 { margin-bottom: 30px; }
.hero h1 .accent {
  background: linear-gradient(96deg, #7ab0ff, var(--blue) 55%, #2a5fe0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .body-lg { margin-bottom: 44px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* hero visual — solar array bleeding in from the right */
.hero-visual {
  position: absolute;
  top: 0;
  right: 0;
  width: 58%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}
.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 74% 44%;
  opacity: 0.62;
  filter: saturate(1.06) contrast(1.04);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, rgba(0, 0, 0, 0.5) 26%, #000 58%);
  mask-image: linear-gradient(to right, transparent 0%, rgba(0, 0, 0, 0.5) 26%, #000 58%);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--black) 2%, rgba(5, 6, 10, 0.55) 26%, transparent 62%);
  pointer-events: none;
}

/* marquee */
.marquee {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 2;
  overflow: hidden;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding: 16px 0;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 42s linear infinite;
}
.marquee-track span {
  display: inline-flex;
  align-items: center;
  gap: 22px;
  padding-right: 22px;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--grey-dim);
  white-space: nowrap;
}
.marquee-track span b { color: var(--white); font-weight: 600; }
.marquee-track i {
  font-style: normal;
  color: var(--blue);
  opacity: 0.7;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}

/* ---------- section shell ---------- */
.section { padding: var(--section) 0; position: relative; }
.section.tight { padding: 88px 0; }
.section.hairline { border-top: 1px solid var(--line-soft); }
.section-head { max-width: 800px; margin-bottom: 72px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- stat strip ---------- */
.strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.strip .cell {
  padding: 40px 30px;
  border-left: 1px solid var(--line-soft);
}
.strip .cell:first-child { border-left: 0; padding-left: 0; }
.strip .num {
  display: block;
  font-size: clamp(1.7rem, 2.8vw, 2.6rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--white);
  line-height: 1;
  margin-bottom: 12px;
}
.strip .num em { font-style: normal; color: var(--blue); }
.strip .lbl {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey-dim);
  line-height: 1.5;
}

/* ---------- challenges / problems ---------- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-soft);
}
.problem {
  padding: 40px 28px 40px 0;
  border-right: 1px solid var(--line-soft);
}
.problem:last-child { border-right: 0; }
.problem h3 { font-size: 1.06rem; font-weight: 500; margin: 18px 0 10px; letter-spacing: -0.02em; }
.problem p { font-size: 0.88rem; color: var(--grey); margin: 0; line-height: 1.66; }
.problem .no {
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--grey-dim);
  font-variant-numeric: tabular-nums;
}
.problem .ico { color: var(--blue); opacity: 0.9; height: 22px; }

/* ---------- numbered facts ---------- */
.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0 0;
  border-top: 1px solid var(--line-soft);
}
.fact {
  padding: 46px 34px 46px 0;
  border-bottom: 1px solid var(--line-soft);
  border-right: 1px solid var(--line-soft);
}
.fact:nth-child(3n) { border-right: 0; }
.fact .no {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--grey-dim);
  margin-bottom: 26px;
  font-variant-numeric: tabular-nums;
}
.fact h3 { font-size: 1.12rem; margin-bottom: 12px; font-weight: 500; }
.fact p { font-size: 0.88rem; color: var(--grey); margin: 0 0 18px; line-height: 1.66; }
.fact .value {
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  color: var(--blue);
  line-height: 1.1;
  display: block;
}

/* ---------- product cards ---------- */
.pcards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-soft); }
.pcard {
  background: var(--black);
  padding: 44px 34px 38px;
  display: flex;
  flex-direction: column;
  transition: background 0.3s;
  position: relative;
}
.pcard:hover { background: var(--panel); }
.pcard .tag {
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 22px;
}
.pcard h3 { font-size: 1.28rem; margin-bottom: 14px; font-weight: 500; letter-spacing: -0.025em; }
.pcard p { font-size: 0.88rem; color: var(--grey); margin-bottom: 28px; }
.pcard dl { margin: 0 0 32px; display: grid; gap: 0; }
.pcard dl div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 0.82rem;
}
.pcard dt { color: var(--grey-dim); }
.pcard dd { margin: 0; color: var(--ink); font-weight: 500; font-variant-numeric: tabular-nums; }
.pcard .more {
  margin-top: auto;
  font-size: 0.68rem;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  color: var(--white);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.pcard .more::after { content: "→"; transition: transform 0.25s; color: var(--blue); }
.pcard:hover .more::after { transform: translateX(6px); }

.pcard-media {
  margin: -44px -34px 30px;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--black-2);
  position: relative;
}
.pcard-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5, 6, 10, 0.75) 0%, transparent 42%);
  pointer-events: none;
}
.pcard-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.7s cubic-bezier(0.2, 0.7, 0.3, 1);
}
.pcard:hover .pcard-media img { transform: scale(1.045); }

/* ---------- split / figure ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.split.wide-left { grid-template-columns: 1.15fr 0.85fr; }
.fig {
  border: 1px solid var(--line);
  background: #ffffff;
  padding: 0;
  position: relative;
  overflow: hidden;
}
.fig img { width: 100%; height: auto; display: block; }
.fig figcaption {
  font-size: 0.72rem;
  color: #55606f;
  margin-top: 0;
  padding: 16px 24px 18px;
  background: #eef2f7;
  border-top: 1px solid rgba(0, 0, 0, 0.07);
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.tech-list { list-style: none; margin: 44px 0 0; padding: 0; }
.tech-list li {
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 18px;
}
.tech-list li:last-child { border-bottom: 1px solid var(--line-soft); }
.tech-list .n {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--blue);
  padding-top: 4px;
  font-variant-numeric: tabular-nums;
}
.tech-list strong { display: block; font-weight: 500; color: var(--white); font-size: 1rem; margin-bottom: 4px; }
.tech-list p { margin: 0; font-size: 0.88rem; color: var(--grey); }

/* ---------- applications ---------- */
.apps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line-soft); }
.app {
  background: var(--black);
  padding: 54px 44px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background 0.3s;
}
.app:hover { background: var(--panel); }
.app .k {
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey-dim);
  margin-bottom: 44px;
}
.app h3 { font-size: 1.4rem; font-weight: 500; margin-bottom: 12px; }
.app p { font-size: 0.88rem; color: var(--grey); margin: 0; max-width: 46ch; }

/* ---------- cta band ---------- */
.cta-band {
  position: relative;
  padding: 130px 0;
  text-align: center;
  border-top: 1px solid var(--line-soft);
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(720px 380px at 50% 120%, rgba(31, 79, 216, 0.28), transparent 70%);
  pointer-events: none;
}
.cta-band .wrap { position: relative; z-index: 2; }
.cta-band h2 { font-size: clamp(1.9rem, 3.8vw, 3.2rem); margin-bottom: 22px; font-weight: 500; }
.cta-band p { color: var(--grey); margin-bottom: 44px; }

/* ---------- glow brand word ---------- */
.brand-glow {
  position: relative;
  padding: 90px 0 40px;
  overflow: hidden;
  text-align: center;
}
.brand-glow span {
  display: block;
  font-size: clamp(2rem, 9.9vw, 13rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 0.98;
  color: var(--blue);
  filter: blur(0.5px);
  text-shadow:
    0 0 40px rgba(61, 120, 255, 0.55),
    0 0 120px rgba(61, 120, 255, 0.42),
    0 0 260px rgba(31, 79, 216, 0.3);
  user-select: none;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line-soft);
  padding: 74px 0 34px;
  font-size: 0.86rem;
  color: var(--grey);
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 46px; }
.site-footer h4 {
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey-dim);
  margin-bottom: 20px;
  font-weight: 500;
}
.site-footer a { display: block; padding: 6px 0; color: var(--grey); transition: color 0.2s; }
.site-footer a:hover { color: var(--white); }
.footer-brand p { max-width: 34ch; color: var(--grey-dim); font-size: 0.84rem; line-height: 1.7; }
.footer-bottom {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.76rem;
  color: var(--grey-dim);
  letter-spacing: 0.02em;
}

/* ---------- page head (sub pages) ---------- */
.page-head {
  padding: 190px 0 90px;
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}
.page-head::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(760px 420px at 70% -10%, rgba(31, 79, 216, 0.22), transparent 68%);
  pointer-events: none;
}
.page-head .wrap { position: relative; z-index: 2; }

/* ---------- jump bar ---------- */
.jump {
  position: sticky;
  top: 82px;
  z-index: 60;
  background: rgba(5, 6, 10, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line-soft);
}
.jump .wrap { display: flex; gap: 30px; overflow-x: auto; padding-top: 17px; padding-bottom: 17px; }
.jump a {
  flex: 0 0 auto;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--grey);
  white-space: nowrap;
  transition: color 0.2s;
}
.jump a:hover { color: var(--white); }

/* ---------- product sections ---------- */
.product {
  padding: 96px 0;
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: 150px;
}
.product-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}
.product-head h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); margin-bottom: 14px; font-weight: 500; }
.product-head > div:first-child { flex: 1 1 320px; min-width: 0; }
.product-head .body-lg { margin: 0; max-width: 56ch; }
.model {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--blue);
  border: 1px solid rgba(61, 120, 255, 0.34);
  padding: 9px 16px;
  white-space: nowrap;
  background: rgba(61, 120, 255, 0.06);
}
.product-body { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.col-stack { display: grid; gap: 40px; }

/* product head side visual */
.head-side { display: flex; flex-direction: column; align-items: flex-end; gap: 18px; flex: 0 0 380px; }
.head-visual {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  position: relative;
  margin: 0;
}
.head-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5, 6, 10, 0.55) 0%, transparent 46%);
  pointer-events: none;
}
.head-visual img { width: 100%; height: 100%; object-fit: cover; display: block; }

.feats { list-style: none; margin: 0 0 8px; padding: 0; }
.feats li {
  position: relative;
  padding: 11px 0 11px 22px;
  font-size: 0.9rem;
  color: var(--ink);
  border-bottom: 1px solid var(--line-soft);
}
.feats li::before {
  content: "";
  position: absolute;
  left: 0; top: 20px;
  width: 7px; height: 1px;
  background: var(--blue);
}

/* dark data tables */
.dt { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.dt caption {
  caption-side: top;
  text-align: left;
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey-dim);
  padding-bottom: 14px;
}
.dt th, .dt td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
.dt th {
  font-weight: 400;
  color: var(--grey);
  width: 55%;
  background: transparent;
}
.dt td { color: var(--white); font-weight: 500; font-variant-numeric: tabular-nums; }
.dt tbody tr:hover th, .dt tbody tr:hover td { background: rgba(255, 255, 255, 0.022); }
.dt thead th {
  width: auto;
  color: var(--white);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.035);
  border-bottom: 1px solid var(--line);
  font-weight: 500;
}
.dt thead th:first-child { color: var(--grey); }
.dt.matrix td { color: var(--white); }

/* multi-model comparison table */
.dt.compare { margin-top: 4px; }
.dt.compare tbody th { width: 30%; }
.dt.compare thead th:not(:first-child) { text-align: right; }
.dt.compare tbody td { text-align: right; white-space: nowrap; }
.dt.compare tbody tr:hover td { background: rgba(61, 120, 255, 0.05); }
.dt.compare tbody td:first-of-type { color: var(--white); }
.dt.compare.two { max-width: 760px; }

/* grade sub-heading inside a product section */
.subhead {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey);
  margin: 64px 0 40px;
}
.subhead::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}
.subhead b { color: var(--blue); font-weight: 600; letter-spacing: 0.12em; }

.note { font-size: 0.78rem; color: var(--grey-dim); line-height: 1.7; max-width: 82ch; }

/* ---------- forms ---------- */
.form-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 80px; align-items: start; }
form.inquiry { display: grid; gap: 30px; }
.field { display: grid; gap: 9px; }
.field label {
  font-size: 0.66rem;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  color: var(--grey-dim);
}
.field label .req { color: var(--blue); }
.field input, .field select, .field textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--white);
  width: 100%;
  transition: border-color 0.25s;
  border-radius: 0;
}
.field textarea { min-height: 110px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--grey-dim); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 0;
  border-bottom-color: var(--blue);
}
.field select { appearance: none; background-image: none; cursor: pointer; }
.field select option { background: var(--panel-2); color: var(--white); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.form-status { font-size: 0.88rem; padding: 16px 18px; display: none; border-left: 2px solid var(--blue); }
.form-status.ok { display: block; color: var(--ink); background: rgba(61, 120, 255, 0.07); }
.form-status.err { display: block; color: #ffb3b3; border-left-color: #d64545; background: rgba(214, 69, 69, 0.08); }
.form-note { font-size: 0.76rem; color: var(--grey-dim); }

.info-list { display: grid; gap: 0; border-top: 1px solid var(--line-soft); }
.info-row { padding: 26px 0; border-bottom: 1px solid var(--line-soft); }
.info-row h4 {
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey-dim);
  margin-bottom: 10px;
  font-weight: 500;
}
.info-row p, .info-row a { font-size: 0.98rem; color: var(--ink); margin: 0; line-height: 1.6; }
.info-row a:hover { color: var(--blue); }

/* ---------- reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1), transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- mobile nav ---------- */
.menu-btn {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  margin-left: auto;
}
.menu-btn span, .menu-btn span::before, .menu-btn span::after {
  content: "";
  display: block;
  width: 17px; height: 1px;
  background: var(--white);
  position: relative;
  transition: transform 0.25s, opacity 0.25s;
}
.menu-btn span::before { position: absolute; top: -5px; }
.menu-btn span::after { position: absolute; top: 5px; }
.menu-btn.open span { background: transparent; }
.menu-btn.open span::before { transform: rotate(45deg) translateY(5px); }
.menu-btn.open span::after { transform: rotate(-45deg) translateY(-5px); }

.drawer {
  display: none;
  position: fixed;
  inset: 82px 0 0 0;
  background: rgba(5, 6, 10, 0.98);
  backdrop-filter: blur(20px);
  z-index: 99;
  padding: 40px var(--gutter);
  overflow-y: auto;
}
.drawer.open { display: block; }
.drawer a {
  display: block;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--white);
}
.drawer .btn { margin-top: 34px; width: 100%; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  :root { --section: 100px; }
  .nav, .header-right { display: none; }
  .menu-btn { display: flex; }
  .hero { padding: 130px 0 120px; }
  .split, .split.wide-left { grid-template-columns: 1fr; gap: 48px; }
  .facts { grid-template-columns: repeat(2, 1fr); }
  .fact:nth-child(3n) { border-right: 1px solid var(--line-soft); }
  .fact:nth-child(2n) { border-right: 0; }
  .problem-grid { grid-template-columns: repeat(2, 1fr); }
  .problem:nth-child(2n) { border-right: 0; }
  .product-body { grid-template-columns: 1fr; gap: 48px; }
  .form-grid { grid-template-columns: 1fr; gap: 56px; }
  .pcards { grid-template-columns: 1fr; }
  .strip { grid-template-columns: 1fr 1fr; }
  .strip .cell { padding: 32px 24px; }
  .strip .cell:nth-child(odd) { border-left: 0; padding-left: 0; }
  .strip .cell:nth-child(-n+2) { border-bottom: 1px solid var(--line-soft); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 720px) {
  :root { --section: 78px; --gutter: 22px; }
  .site-header .wrap { height: 68px; }
  .drawer { inset: 68px 0 0 0; }
  .jump { top: 68px; }
  .hero { padding: 104px 0 108px; }
  .section-head { margin-bottom: 48px; }
  .facts { grid-template-columns: 1fr; }
  .fact { border-right: 0 !important; padding: 34px 0; }
  .problem-grid { grid-template-columns: 1fr; }
  .problem { border-right: 0; padding: 30px 0; }
  .apps { grid-template-columns: 1fr; }
  .app { padding: 36px 26px; min-height: auto; }
  .app .k { margin-bottom: 26px; }
  .strip { grid-template-columns: 1fr; }
  .strip .cell { border-left: 0 !important; padding: 26px 0; border-bottom: 1px solid var(--line-soft); }
  .field-row { grid-template-columns: 1fr; gap: 22px; }
  .product { padding: 64px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 84px 0; }
  .page-head { padding: 140px 0 60px; }
  .brand-glow { padding: 60px 0 24px; }
  .brand-glow span { font-size: 8.9vw; letter-spacing: -0.028em; }
  .dt th, .dt td { padding: 10px 11px; font-size: 0.82rem; }
  .dt.compare { font-size: 0.74rem; }
  .dt.compare tbody th { width: 37%; }
  .dt.compare tbody th, .dt.compare tbody td { padding: 9px 7px; }
  .dt.compare tbody td { white-space: normal; }
  .dt.compare thead th { font-size: 0.58rem; letter-spacing: 0.05em; line-height: 1.5; }
  .subhead { margin: 48px 0 28px; font-size: 0.68rem; letter-spacing: 0.16em; gap: 14px; }
  .hero-actions .btn { flex: 1 1 auto; }
  .hero-visual { width: 100%; }
  .hero-visual img { opacity: 0.3; object-position: 52% 38%; }
  .pcard-media { aspect-ratio: 4 / 3; }
  .head-side { flex: 1 1 100%; align-items: flex-start; }
  .head-visual { aspect-ratio: 16 / 11; }
}

@media print {
  .site-header, .drawer, .jump, .marquee, .brand-glow { display: none; }
  body { background: #fff; color: #000; }
}