/* ================================================================
   PINERA — Aerospace / Lab design system
   Accent: deep lab blue. Binary dark/light chapter rhythm.
   Display: Inter Tight. Text: Inter. Technical: JetBrains Mono.
   ================================================================ */

:root {
  --accent: #1e40af;
  --accent-hot: #2b7fff;
  --accent-deep: #0a1f6b;

  --ink: #0b0d12;           /* near-black */
  --ink-2: #1a1d24;
  --ink-3: #272a33;

  --paper: #ffffff;
  --paper-2: #f4f5f7;       /* pale field */
  --paper-3: #eceef2;

  --line: #d8dbe3;
  --line-2: #b4b8c4;
  --mute: #6b6f7a;
  --mute-2: #9298a4;

  --frost: #c8d6ea;
  --frost-2: #e6ecf5;

  --r-sm: 4px;
  --r-md: 10px;
  --r-lg: 18px;
  --r-xl: 28px;
  --r-pill: 980px;

  --display: 'Inter Tight', Inter, system-ui, sans-serif;
  --text: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--text);
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }

/* ---------- Type utilities ---------- */
.display { font-family: var(--display); font-weight: 600; letter-spacing: -0.03em; line-height: 1.02; }
.display-xxl { font-size: clamp(56px, 8.5vw, 128px); }
.display-xl  { font-size: clamp(44px, 6.2vw, 88px); }
.display-l   { font-size: clamp(36px, 4.6vw, 64px); letter-spacing: -0.025em; }
.display-m   { font-size: clamp(28px, 3.2vw, 44px); letter-spacing: -0.02em; line-height: 1.08; }
.display-s   { font-size: clamp(22px, 2.2vw, 30px); letter-spacing: -0.015em; line-height: 1.15; }

.mono { font-family: var(--mono); font-feature-settings: 'ss01','ss02'; }
.mono-xs { font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 500; }
.mono-s  { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500; }
.mono-m  { font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em; font-weight: 500; }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--mute);
}
.eyebrow--hot { color: var(--accent); }
.eyebrow--light { color: var(--frost); }

/* ---------- Layout ---------- */
.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 clamp(24px, 4vw, 64px);
}
.container--narrow { max-width: 1040px; }

section { position: relative; }

.dark { background: var(--ink); color: #f0f2f7; }
.ink  { background: #05070b; color: #f0f2f7; }
.light { background: var(--paper); color: var(--ink); }
.pale  { background: var(--paper-2); color: var(--ink); }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: transparent;
  color: #f0f2f7;
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}
.nav.is-scrolled {
  background: rgba(11, 13, 18, 0.72);
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  border-bottom-color: rgba(255,255,255,0.06);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(24px, 4vw, 40px);
  max-width: 1560px; margin: 0 auto;
}
.brand {
  font-family: var(--display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.32em;
  display: flex; align-items: center; gap: 10px;
}
.brand-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-hot);
  box-shadow: 0 0 12px var(--accent-hot);
}
.nav-links { display: flex; gap: 28px; }
.nav-link {
  font-size: 13px; color: #c9ccd4; text-decoration: none;
  padding: 6px 2px;
  position: relative;
  font-weight: 400;
  cursor: pointer;
  background: none; border: none;
  font-family: var(--text);
}
.nav-link:hover { color: #fff; }
.nav-link.active { color: #fff; }
.nav-link.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -16px;
  height: 1px; background: var(--accent-hot);
}
.nav-tail { display: flex; align-items: center; gap: 16px; }
.nav-tail .mono-xs { color: #8a8f9b; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--text);
  font-weight: 500;
  font-size: 14px;
  padding: 12px 22px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-deep); }
.btn--ghost-dark { background: #fff; color: var(--accent); border-color: #fff; }
.btn--ghost-dark:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn--ghost-light { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn--ghost-light:hover { background: var(--accent-deep); border-color: var(--accent-deep); color: #fff; }
.btn--ink { background: var(--ink); color: #fff; }
.btn--ink:hover { background: #000; }
.btn--sm { padding: 8px 16px; font-size: 13px; }

.link-arrow {
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
  font-size: 15px;
  display: inline-flex; align-items: center; gap: 6px;
}
.link-arrow::after { content: '→'; transition: transform 0.2s; }
.link-arrow:hover::after { transform: translateX(4px); }
.link-arrow--light { color: var(--accent-hot); }

/* ---------- Hairline HUD ---------- */
.hud {
  display: flex; align-items: center; gap: 14px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--mute);
}
.hud--light { color: var(--mute-2); }
.hud-num { color: var(--accent); }
.hud-num--hot { color: var(--accent-hot); }
.hud-bar {
  flex: 1; height: 1px; background: currentColor; opacity: 0.22;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 30%, rgba(43,127,255,0.14), transparent 60%),
    radial-gradient(ellipse 80% 60% at 30% 80%, rgba(30,64,175,0.18), transparent 65%),
    linear-gradient(180deg, #05070b 0%, #0b0d12 100%);
}
.hero-grid {
  position: absolute; inset: 0; z-index: 1;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 30%, transparent 80%);
}
.hero-content {
  position: relative; z-index: 2;
  flex: 1; display: flex; flex-direction: column;
  justify-content: center;
  padding: 40px 0 32px;
}
.hero-stamp {
  display: flex; align-items: center; gap: 24px;
  margin-bottom: 56px;
}
.hero-stamp-dot {
  width: 8px; height: 8px; background: var(--accent-hot); border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-hot);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.hero h1 {
  margin: 0 0 28px;
  color: #fff;
  max-width: 15ch;
}
.hero h1 .accent { color: var(--accent-hot); font-weight: 500; }
.hero-lede {
  font-size: 19px;
  line-height: 1.55;
  color: #c9ccd4;
  max-width: 52ch;
  margin: 0 0 36px;
  font-weight: 300;
  white-space: pre-line;
}
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-telemetry {
  position: relative; z-index: 2;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.tele {
  display: flex; flex-direction: column; gap: 6px;
}
.tele-val {
  font-family: var(--display);
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1;
}
.tele-val .unit { font-size: 15px; color: var(--mute-2); margin-left: 3px; font-weight: 300; }
.tele-label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; color: var(--mute-2); text-transform: uppercase; }

/* ---------- Hero variants (test) ---------- */
/* shared mono bg */
.hero-a, .hero-b, .hero-c, .hero-d {
  background:
    radial-gradient(ellipse 80% 60% at 50% 10%, rgba(255,255,255,0.06), transparent 60%),
    radial-gradient(ellipse 70% 50% at 50% 90%, rgba(255,255,255,0.04), transparent 65%),
    linear-gradient(180deg, #1a1d24 0%, #0b0d12 55%, #05070b 100%);
}
.hero-a .hero-bg, .hero-b .hero-bg, .hero-c .hero-bg, .hero-d .hero-bg { display: none; }

/* A: right-side bleed */
.hero-a { position: relative; overflow: hidden; }
.hero-a-product {
  position: absolute;
  top: 0; bottom: 0;
  right: -6%;
  width: 58%;
  display: flex; align-items: center; justify-content: flex-end;
  z-index: 1;
  pointer-events: none;
}
.hero-a-product::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, transparent 0%, rgba(11,13,18,0.75) 75%);
  z-index: 2;
}
.hero-a-product img {
  height: 90%; width: auto; object-fit: contain;
  filter: grayscale(0.15) brightness(0.95) drop-shadow(0 40px 80px rgba(0,0,0,0.7));
  position: relative; z-index: 1;
}

/* B: blueprint / monochrome */
.hero-b { position: relative; overflow: hidden; }
.hero-b::before {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(8,10,14,0.80), rgba(8,10,14,0.92)),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 48px);
  z-index: 0;
}
.hero-b-grid {
  position: relative; z-index: 1;
  max-width: 1560px; margin: 0 auto;
  padding: 120px clamp(24px, 4vw, 40px) 80px;
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: 64px; align-items: center;
  min-height: 100vh;
}
.hero-b-stage {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  padding: 40px;
}
.hero-b-stage img {
  width: 100%; max-width: 380px;
  filter: grayscale(1) brightness(1.1) contrast(1.1);
  opacity: 0.92;
}
.hero-b-ticks {
  position: absolute; left: 0; top: 10%; bottom: 10%;
  display: flex; flex-direction: column; justify-content: space-around;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em; color: rgba(255,255,255,0.7);
}
.hero-b-ticks .tick {
  display: flex; align-items: center; gap: 12px;
}
.hero-b-ticks .tick span:first-child {
  width: 22px; height: 22px; border: 1px solid rgba(255,255,255,0.35);
  border-radius: 50%; display: flex; align-items:center; justify-content: center;
  color: rgba(255,255,255,0.8);
}
.hero-b-caption {
  position: absolute; bottom: 20px; left: 40px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; color: rgba(255,255,255,0.55);
}
.hero-b-copy { color: #fff; }

/* C: technical overlay (HUD) */
.hero-c { position: relative; overflow: hidden; }
.hero-c-inner {
  position: relative; z-index: 1;
  max-width: 1560px; margin: 0 auto;
  padding: 120px clamp(24px, 4vw, 40px) 80px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  min-height: 100vh;
}
.hero-c-copy { color: #fff; }
.hero-c-stage {
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.hero-c-product {
  position: relative;
  width: 100%; max-width: 440px; aspect-ratio: 3/5;
  display: flex; align-items: center; justify-content: center;
}
.hero-c-product img {
  height: 92%; width: auto; object-fit: contain; position: relative; z-index: 1;
  filter: grayscale(0.2) drop-shadow(0 40px 80px rgba(0,0,0,0.6));
}
.hero-c-cal {
  position: absolute; right: -20px; display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; color: rgba(255,255,255,0.85);
  z-index: 3; white-space: nowrap;
}
.hero-c-cal .cal-line { width: 60px; height: 1px; background: rgba(255,255,255,0.5); }
.hero-c-cal--top { top: 12%; }
.hero-c-cal--mid { top: 50%; }
.hero-c-cal--bot { bottom: 12%; }
.hero-c-corner {
  position: absolute; width: 18px; height: 18px;
  border-color: rgba(255,255,255,0.55); border-style: solid; border-width: 0;
}
.hero-c-corner.tl { top: 0; left: 0; border-top-width: 1px; border-left-width: 1px; }
.hero-c-corner.tr { top: 0; right: 0; border-top-width: 1px; border-right-width: 1px; }
.hero-c-corner.bl { bottom: 0; left: 0; border-bottom-width: 1px; border-left-width: 1px; }
.hero-c-corner.br { bottom: 0; right: 0; border-bottom-width: 1px; border-right-width: 1px; }

/* D: half-visible drama */
.hero-d { position: relative; overflow: hidden; }
.hero-d-content {
  position: relative; z-index: 2;
  padding-top: 140px; padding-bottom: 40px;
}
.hero-d-product {
  position: absolute;
  left: 50%; bottom: 0; transform: translateX(-50%);
  width: min(520px, 50vw);
  z-index: 1;
  pointer-events: none;
}
.hero-d-product img {
  width: 100%; display: block;
  mask-image: linear-gradient(180deg, transparent 0%, #000 30%, #000 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 30%, #000 100%);
  filter: grayscale(0.25) drop-shadow(0 -20px 80px rgba(255,255,255,0.08));
}
.hero-d-product::after {
  content: ''; position: absolute; left: 50%; bottom: -20px; transform: translateX(-50%);
  width: 120%; height: 120px;
  background: radial-gradient(ellipse at center bottom, rgba(255,255,255,0.08), transparent 70%);
  z-index: -1;
}

/* ---------- Section container rhythm ---------- */
.section {
  padding: clamp(120px, 13vw, 180px) 0;
}
.section--short { padding: clamp(120px, 13vw, 180px) 0; }

.section-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: end;
  margin-bottom: 72px;
}
.section-head--stack {
  grid-template-columns: 1fr;
  max-width: 900px;
}
.section-head h2 { margin: 12px 0 0; }
.section-head p { margin: 0; font-size: 17px; color: var(--mute); line-height: 1.55; max-width: 48ch; }
.dark .section-head p, .ink .section-head p { color: #b8bdc9; }

/* ---------- Problem / H2O ---------- */
.problem {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 80px;
  align-items: center;
}
.problem-art {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--paper);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}
.problem-art img { width: 100%; height: 100%; object-fit: cover; }
.problem-art-corner {
  position: absolute; top: 16px; left: 16px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  color: var(--ink); text-transform: uppercase;
  background: rgba(255,255,255,0.88);
  padding: 6px 10px;
  border-radius: var(--r-sm);
  backdrop-filter: blur(8px);
}
.problem-art-label {
  position: absolute; bottom: 16px; right: 16px;
  font-family: var(--display);
  font-weight: 500;
  font-size: 64px;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.03em;
}
.problem-content .big-stat {
  font-family: var(--display);
  font-size: clamp(80px, 10vw, 140px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.9;
  color: var(--ink);
  margin-bottom: 16px;
}
.problem-content .big-stat .pct { font-size: 0.5em; color: var(--accent); vertical-align: baseline; margin-left: 6px; }
.problem-content h2 {
  margin: 24px 0 20px;
  white-space: pre-line;
  font-size: clamp(28px, 2.9vw, 40px);
  line-height: 1.25;
  max-width: none;
}
.problem-content p { color: var(--mute); font-size: 17px; line-height: 1.55; max-width: 44ch; margin: 0; }

/* ---------- Frost / Temperature chapter (dark) ---------- */
.frost-chapter {
  position: relative;
  overflow: hidden;
}
.frost-chapter::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(43,127,255,0.15), transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(30,64,175,0.18), transparent 55%);
  z-index: 0;
}
.frost-chapter > * { position: relative; z-index: 1; }
.frost-h2-oneline {
  white-space: nowrap;
  font-size: clamp(28px, 4vw, 60px);
  letter-spacing: -0.025em;
}
.temp-display {
  display: flex; align-items: baseline; gap: 24px;
  margin: 48px 0 24px;
}
.temp-num {
  font-family: var(--display);
  font-size: clamp(120px, 18vw, 240px);
  font-weight: 300;
  letter-spacing: -0.06em;
  line-height: 0.85;
  color: #fff;
}
.temp-num .deg {
  color: var(--accent-hot);
}
.temp-labels {
  display: flex; flex-direction: column; gap: 4px;
  padding-bottom: 24px;
}
.temp-labels .mono-xs { color: var(--mute-2); }
.temp-labels .big { font-family: var(--display); font-size: 22px; color: #fff; letter-spacing: -0.01em; }

.timeline-chart {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-top: 24px;
}
.chart-cell {
  padding: 28px 24px;
  background: rgba(5, 7, 11, 0.6);
  display: flex; flex-direction: column; gap: 10px;
}
.chart-cell .mono-xs { color: var(--mute-2); }
.chart-cell-val {
  font-family: var(--display);
  font-size: 34px;
  font-weight: 500;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1;
}
.chart-cell-val .accent { color: var(--accent-hot); }
.chart-cell-sub {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mute-2);
}

/* ---------- Product lineup (light) ---------- */
.lineup-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.pcard {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.pcard:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 48px -20px rgba(11, 13, 18, 0.18);
}
.pcard-stage {
  position: relative;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(180deg, #f4f5f7 0%, #e6ecf5 100%);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.pcard-stage--dark {
  background:
    radial-gradient(ellipse at center, #1a1d24 0%, #0b0d12 80%);
}
.pcard-stage-hud {
  position: absolute; top: 18px; left: 20px; right: 20px;
  display: flex; justify-content: space-between;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
}
.pcard-stage--dark .pcard-stage-hud { color: var(--mute-2); }
.pcard-stage--dark .pcard-stage-hud .hot { color: var(--accent-hot); }
.pcard-product-img {
  max-width: 62%;
  max-height: 82%;
  object-fit: contain;
  filter: drop-shadow(0 20px 30px rgba(11, 13, 18, 0.18));
}
.pcard-product {
  width: 60%;
  height: 72%;
  border-radius: 18px;
  position: relative;
  background: repeating-linear-gradient(
    135deg,
    rgba(11,13,18,0.05) 0 1px,
    transparent 1px 14px
  ), linear-gradient(180deg, #fafbfc 0%, #dde3ed 100%);
  border: 1px solid rgba(11,13,18,0.08);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  color: var(--mute);
  text-transform: uppercase;
}
.pcard-stage--dark .pcard-product {
  background: repeating-linear-gradient(
    135deg,
    rgba(255,255,255,0.04) 0 1px,
    transparent 1px 14px
  ), linear-gradient(180deg, #2a3245 0%, #141824 100%);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--mute-2);
}
.pcard-body {
  padding: 32px;
  display: flex; flex-direction: column; gap: 20px;
}
.pcard-title-row {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 16px;
}
.pcard-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: 40px;
  letter-spacing: -0.02em;
  line-height: 1;
}
.pcard-badge {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  padding: 6px 10px; border-radius: var(--r-sm);
  background: var(--paper-2); color: var(--ink);
  white-space: nowrap;
}
.pcard-tagline {
  font-size: 16px; color: var(--mute); line-height: 1.5; margin: 0;
}
.pcard-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.pcard-spec {
  background: var(--paper);
  padding: 16px 14px;
  display: flex; flex-direction: column; gap: 4px;
}
.pcard-spec-val {
  font-family: var(--display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.015em;
  line-height: 1;
}
.pcard-spec-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em;
  color: var(--mute); text-transform: uppercase;
}
.pcard-ctas { display: flex; gap: 10px; margin-top: 4px; }

/* ---------- Applications ---------- */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}
.app-card {
  background: var(--paper);
  padding: 28px;
  display: flex; flex-direction: column; gap: 20px;
  min-height: 320px;
}
.app-illus {
  background: var(--paper-2);
  border-radius: var(--r-md);
  aspect-ratio: 16/10;
  display: flex; align-items: center; justify-content: center;
  padding: 18px;
  border: 1px solid var(--line);
}
.app-illus img { max-height: 100%; max-width: 100%; width: auto; object-fit: contain; mix-blend-mode: multiply; }
.app-title { font-family: var(--display); font-weight: 600; font-size: 20px; letter-spacing: -0.015em; margin: 0; }
.app-desc { font-size: 13px; color: var(--mute); margin: 0; line-height: 1.5; }
.app-no {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  color: var(--mute); text-transform: uppercase;
}

/* ---------- Industries band ---------- */
.industries-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(120px, 13vw, 180px) 0;
  isolation: isolate;
  display: flex;
  align-items: center;
}
.industries-hero-bg {
  position: absolute; inset: 0;
  z-index: -2;
}
.industries-hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.industries-hero-slide {
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity 0.6s ease-in-out;
}
.industries-hero-slide.is-active { opacity: 1; }
.industries-c-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: center;
}
.industries-index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(255,255,255,0.2);
}
.industries-index li {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  color: #fff;
}
.industries-index-n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.55);
  min-width: 26px;
}
.industries-index-t {
  font-family: var(--display);
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: 500;
  letter-spacing: -0.01em;
}
@media (max-width: 900px) {
  .industries-c-layout { grid-template-columns: 1fr; gap: 32px; }
}
.industries-hero::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(5,7,11,0.72) 0%, rgba(5,7,11,0.82) 100%);
  z-index: -1;
}
.industries-hero-inner { position: relative; }
.industries-hero-h { color: #fff; }
.industry-chip--light {
  color: rgba(255,255,255,0.88);
  border-color: rgba(255,255,255,0.35);
}
.industries {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 36px 0;
}
.industry-chip {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  border: 1px solid currentColor;
  color: var(--mute);
}
.industries--dark .industry-chip { color: var(--mute-2); border-color: rgba(255,255,255,0.18); }

/* ---------- Global footprint ---------- */
.footprint {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
}
.footprint-stat {
  font-family: var(--display);
  font-size: clamp(72px, 10vw, 130px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.88;
  margin: 0 0 24px;
}
.footprint-stat .plus { color: var(--accent-hot); font-size: 0.5em; vertical-align: top; font-weight: 300; }
.footprint-countries { display: flex; flex-direction: column; gap: 0; }

/* Lead rows: China + Vietnam with quantified counts */
.country-lead {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid rgba(255,255,255,0.12);
  align-items: baseline;
}
.country-lead:last-of-type { border-bottom: 1px solid rgba(255,255,255,0.12); }
.country-lead .num { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--mute-2); }
.country-lead .name { font-family: var(--display); font-size: 26px; font-weight: 500; letter-spacing: -0.01em; color: #fff; }
.country-lead .count {
  font-family: var(--display);
  font-size: 34px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1;
}
.country-lead .count .unit {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mute-2);
  margin-left: 8px;
  vertical-align: middle;
  text-transform: uppercase;
}
.country-bar {
  grid-column: 2 / -1;
  height: 2px;
  background: rgba(255,255,255,0.08);
  margin-top: 14px;
  position: relative;
  overflow: hidden;
}
.country-bar::after {
  content: "";
  position: absolute; top: 0; left: 0; bottom: 0;
  width: var(--w, 50%);
  background: var(--accent-hot);
}

/* Other countries: grouped chip row */
.country-active-group {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.country-active-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-hot);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.country-active-label::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-hot);
  box-shadow: 0 0 0 4px rgba(239,95,58,0.18);
}
.country-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.country-chip {
  font-family: var(--display);
  font-size: 15px;
  color: #fff;
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 2px;
  letter-spacing: -0.005em;
}

/* ---------- Timeline ---------- */
.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  margin-top: 48px;
}
.timeline-item {
  padding: 32px 24px;
  border-right: 1px solid var(--line);
  position: relative;
}
.timeline-item:last-child { border-right: none; }
.timeline-item::before {
  content: ''; position: absolute; top: -5px; left: 24px;
  width: 9px; height: 9px; background: var(--accent); border-radius: 50%;
}
.timeline-year { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; color: var(--accent); font-weight: 500; margin-bottom: 10px; }
.timeline-text { font-family: var(--display); font-size: 17px; font-weight: 500; letter-spacing: -0.01em; line-height: 1.3; }

/* ---------- Footer ---------- */
.footer {
  background: #05070b; color: #c9ccd4;
  padding: 80px 0 40px;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 64px;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { font-family: var(--display); font-weight: 600; font-size: 32px; letter-spacing: 0.08em; color: #fff; margin-bottom: 16px; }
.footer-tag { font-size: 14px; color: var(--mute-2); max-width: 36ch; }
.footer-col h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: #fff; margin: 0 0 18px; font-weight: 500; }
.footer-col a,
.footer-col span { display: block; color: #b8bdc9; text-decoration: none; font-size: 14px; padding: 4px 0; }
.footer-col a:hover { color: #fff; }
.footer-text { display: block; color: #b8bdc9; font-size: 14px; padding: 4px 0; }
.footer-bottom {
  padding-top: 32px;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono); font-size: 11px; color: var(--mute); letter-spacing: 0.08em;
}

/* ---------- Configurator page ---------- */
.config-top {
  padding: 24px 0 12px;
  border-bottom: 1px solid var(--line);
}
.breadcrumb {
  display: flex; gap: 8px; align-items: center;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; color: var(--mute); text-transform: uppercase;
  margin-bottom: 12px;
}
.breadcrumb a { color: var(--mute); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb .sep { opacity: 0.4; }

.config-hero {
  padding: 32px 0 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.config-gallery {
  position: sticky; top: 72px;
  background: var(--paper-2);
  border-radius: var(--r-xl);
  aspect-ratio: 4 / 4.2;
  padding: 32px;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.config-gallery-hud {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 8px;
}
.config-gallery-stage {
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  min-height: 520px;
  padding: 24px;
}
.config-product {
  width: 70%; aspect-ratio: 3/5;
  border-radius: 16px;
  background: repeating-linear-gradient(
    135deg,
    rgba(11,13,18,0.04) 0 1px,
    transparent 1px 16px
  ), linear-gradient(180deg, #ffffff 0%, #d8e0ed 100%);
  border: 1px solid var(--line);
  box-shadow: 0 32px 60px -30px rgba(11,13,18,0.3);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--mute);
  text-align: center;
  padding: 20px;
}
.config-gallery-thumbs {
  display: flex; gap: 8px;
  margin-top: 16px;
}
.config-product-img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 32px 60px rgba(11,13,18,0.3));
}
.config-thumb {
  width: 56px; height: 56px; border-radius: var(--r-md);
  background: var(--paper);
  border: 1px solid var(--line);
  cursor: pointer;
  overflow: hidden;
  padding: 4px;
  transition: border-color 0.15s;
}
.config-thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }
.config-thumb:hover { border-color: var(--ink); }
.config-thumb.active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }

.config-meta { display: flex; flex-direction: column; gap: 24px; }
.config-meta h1 {
  font-family: var(--display);
  font-size: clamp(44px, 5vw, 64px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 0;
}
.config-meta h1 small {
  display: block;
  font-size: 0.34em;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 10px;
  font-family: var(--mono);
}
.config-tagline { font-size: 17px; color: var(--mute); line-height: 1.55; margin: 0; max-width: 46ch; }

.price-block {
  padding: 20px 0 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px;
}
.price-label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--mute); }
.price-val { font-family: var(--display); font-size: 28px; font-weight: 500; letter-spacing: -0.015em; }
.price-val .unit { font-size: 13px; color: var(--mute); font-weight: 400; margin-left: 6px; }

/* Config sections */
.opt-group { padding: 20px 0 24px; border-bottom: 1px solid var(--line); }
.opt-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 12px;
}
.opt-title { font-family: var(--display); font-weight: 600; font-size: 18px; letter-spacing: -0.01em; margin: 0; }
.opt-hint { font-family: var(--mono); font-size: 11px; color: var(--mute); letter-spacing: 0.08em; }

.opt-choice-row { display: flex; flex-direction: column; gap: 8px; }
.opt-choice {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  cursor: pointer;
  background: var(--paper);
  transition: border-color 0.15s, background 0.15s;
  text-align: left;
}
.opt-choice:hover { border-color: var(--line-2); }
.opt-choice.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.opt-radio {
  width: 18px; height: 18px; border-radius: 50%;
  border: 1.5px solid var(--line-2);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.opt-choice.selected .opt-radio { border-color: var(--accent); }
.opt-choice.selected .opt-radio::after {
  content: ''; width: 9px; height: 9px; border-radius: 50%; background: var(--accent);
}
.opt-main { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.opt-name { font-weight: 500; font-size: 15px; }
.opt-sub { font-family: var(--mono); font-size: 11px; color: var(--mute); letter-spacing: 0.04em; }
.opt-price { font-family: var(--mono); font-size: 13px; font-weight: 500; color: var(--ink); white-space: nowrap; }

.opt-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.opt-chip {
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--paper);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--text);
}
.opt-chip:hover { border-color: var(--line-2); }
.opt-chip.selected {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.opt-toggles { display: flex; flex-direction: column; gap: 8px; }
.opt-toggle {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper);
  cursor: pointer;
  transition: border-color 0.15s;
  text-align: left;
}
.opt-toggle:hover { border-color: var(--line-2); }
.opt-toggle.on { border-color: var(--accent); background: rgba(30, 64, 175, 0.04); }
.opt-check {
  width: 20px; height: 20px; border-radius: 6px;
  border: 1.5px solid var(--line-2);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.opt-toggle.on .opt-check {
  background: var(--accent); border-color: var(--accent);
}
.opt-toggle.on .opt-check::after {
  content: ''; width: 10px; height: 5px; border-left: 2px solid #fff; border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translate(1px, -1px);
}

.delivery-info {
  margin-top: 28px;
  padding: 20px 22px;
  background: var(--paper-2);
  border-radius: var(--r-lg);
  display: flex; align-items: flex-start; gap: 16px;
}
.delivery-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--paper);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 11px; color: var(--accent); font-weight: 600;
  flex-shrink: 0;
}
.delivery-info h4 { margin: 0 0 4px; font-size: 14px; font-weight: 600; }
.delivery-info p { margin: 0; font-size: 13px; color: var(--mute); line-height: 1.5; }

.spec-card {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: #fff;
}
.spec-card-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.spec-card-row:last-child { border-bottom: none; }
.spec-card-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mute);
  text-transform: uppercase;
}
.spec-card-val {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  text-align: right;
}

.summary-bar {
  position: sticky; bottom: 0; z-index: 40;
  background: rgba(11, 13, 18, 0.94);
  backdrop-filter: blur(12px);
  color: #fff;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.summary-bar-inner {
  padding: 18px clamp(24px, 4vw, 64px);
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px;
  max-width: 1560px; margin: 0 auto;
}
.summary-left { display: flex; gap: 32px; align-items: baseline; }
.summary-price { font-family: var(--display); font-size: 24px; font-weight: 500; letter-spacing: -0.015em; }
.summary-meta { font-family: var(--mono); font-size: 11px; color: var(--mute-2); letter-spacing: 0.12em; text-transform: uppercase; }
.summary-right { display: flex; gap: 10px; }

/* ---------- Full spec table ---------- */
.spec-table {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}
.spec-h, .spec-c {
  background: var(--paper);
  padding: 16px 22px;
  font-size: 14px;
}
.spec-h { font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--mute); background: var(--paper-2); }
.spec-h.product { color: var(--ink); font-weight: 600; letter-spacing: 0.08em; font-size: 13px; }
.spec-c.label { font-family: var(--text); color: var(--mute); font-size: 13px; }
.spec-c.val { font-family: var(--mono); font-weight: 500; font-size: 13px; letter-spacing: 0.02em; }
.spec-c.val.highlight { color: var(--accent); }

/* ---------- Frost animation for temp number ---------- */
.frost-text {
  background: linear-gradient(180deg, #ffffff 0%, #8caacf 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .section-head { grid-template-columns: 1fr; gap: 20px; }
  .problem { grid-template-columns: 1fr; gap: 48px; }
  .lineup-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .timeline-item:nth-child(2n) { border-right: none; }
  .footprint { grid-template-columns: 1fr; gap: 48px; }
  .config-hero { grid-template-columns: 1fr; }
  .config-gallery { position: static; aspect-ratio: 4/3.4; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .hero-telemetry { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .timeline-chart { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .apps-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .timeline-item { border-right: none; border-bottom: 1px solid var(--line); }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .summary-left { flex-direction: column; gap: 2px; }
  .spec-table { grid-template-columns: 1fr; }
  .spec-h:not(:first-child), .spec-c { text-align: left; }
}