/* ────────────────────────────────────────────────────────────────
   SKTS · СОПТ-Комплект · промо-лендинг
   ──────────────────────────────────────────────────────────────── */

/* Unbounded loaded via Google Fonts in HTML head; Helvetica Neue via system fallback */

:root {
  --bg: #000000;
  --surface: #0a0a0a;
  --surface-2: #121212;
  --text: #d9d9d9;
  --text-dim: #8a8a8a;
  --text-faint: #555555;
  --accent: #ea4e24;
  --hairline: rgba(217, 217, 217, 0.12);
  --hairline-strong: rgba(217, 217, 217, 0.24);
  --display: 'Unbounded', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --body: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--bg); color: var(--text); font-family: var(--body); }
body {
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

::selection { background: var(--accent); color: #000; }

/* utility */
.eyebrow {
  font-family: var(--body);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.eyebrow-accent { color: var(--accent); }
.num {
  font-family: var(--body);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.kicker::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.container {
  width: 100%;
  max-width: 1680px;
  margin: 0 auto;
  padding: 0 48px;
}

/* ─── NAV ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 22px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(180deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0) 100%);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #fff;
}
.nav-brand svg { width: 36px; height: auto; color: var(--accent); }
.nav-brand .name {
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav-brand .name .dim { color: var(--text-dim); font-weight: 400; }
.nav-links {
  display: flex;
  gap: 36px;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.nav-links a { transition: color 0.2s; }
.nav-links a:hover { color: #fff; }
.nav-cta {
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 12px 22px;
  border: 1px solid var(--hairline-strong);
  color: #fff;
  transition: background 0.2s, border-color 0.2s;
}
.nav-cta:hover { background: var(--accent); border-color: var(--accent); }

/* ─── HERO ─── */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 120px 48px 60px;
  display: grid;
  grid-template-columns: 0.85fr 1.2fr;
  gap: 48px;
  overflow: hidden;
}
.hero::before {
  /* faint grid */
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(217,217,217,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(217,217,217,0.03) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}
.hero-meta {
  position: absolute;
  top: 110px;
  right: 48px;
  text-align: right;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  text-transform: uppercase;
}
.hero-meta .acc { color: var(--accent); }

.hero-text {
  position: relative;
  z-index: 2;
  align-self: end;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 28px;
}
.hero-eyebrow .pill {
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 4px 10px;
  font-family: var(--body);
}

.hero h1 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(96px, 16vw, 280px);
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: #fff;
  margin-bottom: 16px;
}
.hero h1 .glyph-accent {
  color: var(--accent);
  font-style: normal;
  display: inline-block;
  transform: translateY(-0.04em);
}
.hero-sub {
  font-family: var(--display);
  font-size: clamp(22px, 2.4vw, 36px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 640px;
  margin-bottom: 36px;
}
.hero-lede {
  max-width: 460px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-dim);
  margin-bottom: 48px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  max-width: 720px;
}
.hero-stat {
  padding: 20px 24px 20px 0;
  border-right: 1px solid var(--hairline);
}
.hero-stat:last-child { border-right: 0; padding-right: 0; }
.hero-stat:not(:first-child) { padding-left: 24px; }
.hero-stat .label {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 8px;
}
.hero-stat .val {
  font-family: var(--display);
  font-size: 28px;
  letter-spacing: -0.01em;
  color: #fff;
}
.hero-stat .val .unit {
  font-size: 14px;
  color: var(--text-dim);
  margin-left: 4px;
}

/* hero image */
.hero-figure {
  position: relative;
  z-index: 1;
  align-self: stretch;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.hero-figure img {
  max-height: 120vh;
  min-height: 100vh;
  width: 100%;
  object-fit: contain;
  object-position: 100% bottom;
  filter: drop-shadow(0 40px 80px rgba(0,0,0,0.6));
}
.hero-figure-label {
  position: absolute;
  bottom: 0;
  right: 0;
  text-align: right;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  line-height: 1.8;
}
.hero-figure-label .art {
  font-family: var(--body);
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.hero-marker {
  position: absolute;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-marker.m1 { top: 12%; left: -100px; }
.hero-marker.m2 { top: 44%; left: -130px; }
.hero-marker.m3 { bottom: 18%; left: -90px; }
.hero-marker::after {
  content: '';
  width: 60px;
  height: 1px;
  background: var(--accent);
}
.hero-marker .dot {
  width: 5px; height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

/* ─── TICKER ─── */
.ticker {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--bg);
}
.ticker-track {
  display: flex;
  gap: 80px;
  white-space: nowrap;
  padding: 22px 0;
  animation: tickerScroll 60s linear infinite;
  font-family: var(--display);
  font-size: 22px;
  letter-spacing: -0.01em;
  color: #fff;
}
.ticker-track .sep { color: var(--accent); }
@keyframes tickerScroll {
  to { transform: translateX(-50%); }
}

/* ─── SECTION SCAFFOLD ─── */
section {
  position: relative;
  padding: 140px 0;
  border-top: 1px solid var(--hairline);
}
.section-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  margin-bottom: 80px;
  align-items: end;
}
.section-head h2 {
  font-family: var(--display);
  font-size: clamp(48px, 6vw, 92px);
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: #fff;
}
.section-head .lede {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  max-width: 540px;
}
.section-head .lede strong { color: #fff; font-weight: 400; }
.section-index {
  position: absolute;
  top: 40px;
  right: 48px;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.section-index .acc { color: var(--accent); }

/* ─── ANATOMY (three core features) ─── */
.anatomy {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.anatomy-row {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 64px;
  align-items: stretch;
  padding: 80px 0;
  border-top: 1px solid var(--hairline);
}
.anatomy-row:nth-child(even) {
  grid-template-columns: 1.1fr 1fr;
}
.anatomy-row:nth-child(even) .anatomy-figure { order: -1; }

.anatomy-figure {
  position: relative;
  background: var(--surface);
  min-height: 540px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--hairline);
}
.anatomy-figure::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(217,217,217,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(217,217,217,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}
.anatomy-figure img {
  position: relative;
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  z-index: 1;
}
.anatomy-figure .corner {
  position: absolute;
  width: 28px;
  height: 28px;
  border: 1px solid var(--accent);
}
.anatomy-figure .corner.tl { top: 16px; left: 16px; border-right: 0; border-bottom: 0; }
.anatomy-figure .corner.tr { top: 16px; right: 16px; border-left: 0; border-bottom: 0; }
.anatomy-figure .corner.bl { bottom: 16px; left: 16px; border-right: 0; border-top: 0; }
.anatomy-figure .corner.br { bottom: 16px; right: 16px; border-left: 0; border-top: 0; }
.anatomy-figure .tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-family: var(--body);
  z-index: 2;
}
.anatomy-figure .tag .num { color: var(--accent); margin-right: 8px; }

.anatomy-text {
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.anatomy-text .idx {
  font-family: var(--display);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 24px;
}
.anatomy-text h3 {
  font-family: var(--display);
  font-size: clamp(36px, 4.2vw, 64px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 28px;
}
.anatomy-text .lead {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: 32px;
  max-width: 540px;
}
.anatomy-text .lead strong { color: #fff; font-weight: 400; }
.anatomy-text .details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline);
  max-width: 540px;
}
.anatomy-text .details > div {
  padding: 20px 0;
  border-bottom: 1px solid var(--hairline);
  border-right: 1px solid var(--hairline);
  padding-right: 16px;
}
.anatomy-text .details > div:nth-child(even) {
  border-right: 0;
  padding-left: 20px;
  padding-right: 0;
}
.anatomy-text .details .k {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.anatomy-text .details .v {
  font-family: var(--display);
  font-size: 22px;
  color: #fff;
  letter-spacing: -0.01em;
}
.anatomy-text .details .v .unit {
  font-size: 12px;
  color: var(--text-dim);
  margin-left: 4px;
  letter-spacing: 0;
}

/* ─── CONFIGURATOR ─── */
.config {
  background: var(--surface);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.config-controls .group {
  margin-bottom: 36px;
}
.config-controls .group-label {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.config-controls .group-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--hairline);
}
.dim-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.dim-btn {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--hairline-strong);
  padding: 14px 22px;
  font-family: var(--display);
  font-size: 18px;
  letter-spacing: -0.01em;
  transition: all 0.15s;
  min-width: 88px;
  text-align: center;
}
.dim-btn:hover {
  border-color: var(--text);
  color: #fff;
}
.dim-btn.active {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.dim-btn.disabled {
  opacity: 0.25;
  cursor: not-allowed;
  pointer-events: none;
}
.dim-btn .unit {
  font-size: 11px;
  color: inherit;
  opacity: 0.6;
  margin-left: 4px;
  letter-spacing: 0;
  font-family: var(--body);
}

.config-readout {
  background: var(--bg);
  border: 1px solid var(--hairline);
  padding: 40px;
  position: sticky;
  top: 100px;
}
.config-readout .article {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.config-readout .article-num {
  font-family: var(--display);
  font-size: 32px;
  letter-spacing: 0.02em;
  color: var(--accent);
  margin-bottom: 32px;
  font-variant-numeric: tabular-nums;
}
.config-readout .article-num.unavailable { color: var(--text-faint); font-size: 18px; }
.config-readout .silhouette {
  position: relative;
  margin: 0 auto 32px;
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1 / 1.4;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  border-bottom: 1px solid var(--hairline);
}
.config-readout .silhouette-shape {
  background: linear-gradient(180deg, #1a1a1a 0%, #0a0a0a 100%);
  border: 1px solid var(--hairline-strong);
  transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  position: relative;
}
.config-readout .silhouette-shape::before {
  /* door */
  content: '';
  position: absolute;
  top: 4%;
  left: 8%;
  width: 84%;
  height: 92%;
  background: linear-gradient(135deg, rgba(217,217,217,0.06) 0%, rgba(217,217,217,0.02) 100%);
  border: 1px solid var(--hairline);
}
.config-readout .silhouette-shape::after {
  /* handle */
  content: '';
  position: absolute;
  right: 12%;
  top: 50%;
  width: 8px;
  height: 24px;
  background: var(--accent);
  transform: translateY(-50%);
}
.config-readout .silhouette .dim-label {
  position: absolute;
  font-size: 10px;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}
.config-readout .silhouette .dim-label.h { right: -4px; top: 50%; transform: translate(100%, -50%) rotate(-90deg); transform-origin: left center; }
.config-readout .silhouette .dim-label.w { bottom: -22px; left: 50%; transform: translateX(-50%); }

.config-readout .specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--hairline);
}
.config-readout .specs > div {
  padding: 18px 0;
  border-bottom: 1px solid var(--hairline);
}
.config-readout .specs > div:nth-child(odd) {
  border-right: 1px solid var(--hairline);
  padding-right: 16px;
}
.config-readout .specs > div:nth-child(even) { padding-left: 16px; }
.config-readout .specs .k {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.config-readout .specs .v {
  font-family: var(--display);
  font-size: 22px;
  color: #fff;
  letter-spacing: -0.01em;
}
.config-readout .specs .v .unit {
  font-size: 11px;
  color: var(--text-dim);
  margin-left: 4px;
}
.config-readout .cta {
  margin-top: 24px;
  width: 100%;
  background: var(--accent);
  color: #000;
  border: 0;
  padding: 18px;
  font-family: var(--display);
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: background 0.2s;
}
.config-readout .cta:hover { background: #fff; }

/* ─── COMPLETION / BOX CONTENTS ─── */
.contents {
  background: var(--bg);
}
.contents-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: start;
}
.contents-list {
  border-top: 1px solid var(--hairline);
}
.contents-row {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--hairline);
  align-items: center;
}
.contents-row .idx {
  font-family: var(--display);
  font-size: 14px;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.contents-row .title {
  font-family: var(--display);
  font-size: 20px;
  color: #fff;
  letter-spacing: -0.01em;
}
.contents-row .desc {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}
.contents-row .qty {
  font-family: var(--display);
  font-size: 16px;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}
.contents-aside {
  position: sticky;
  top: 120px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  padding: 36px;
}
.contents-aside h4 {
  font-family: var(--display);
  font-size: 22px;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.contents-aside p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.65;
  margin-bottom: 24px;
}
.contents-aside .badge-row {
  display: grid;
  gap: 12px;
}
.contents-aside .badge {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 13px;
}
.contents-aside .badge:last-child { border-bottom: 0; }
.contents-aside .badge .k {
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 10px;
}
.contents-aside .badge .v {
  font-family: var(--display);
  color: #fff;
  font-size: 18px;
  letter-spacing: -0.01em;
}

/* ─── DETAIL SHOT ─── */
.detail-shot {
  position: relative;
  padding: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: var(--surface);
  overflow: hidden;
}
.detail-shot-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 720px;
}
.detail-shot-img {
  position: relative;
  background: #050505;
  overflow: hidden;
}
.detail-shot-img img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.1) contrast(1.05);
}
.detail-shot-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 60%, var(--surface) 100%);
}
.detail-shot-text {
  padding: 100px 64px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.detail-shot-text .big-num {
  font-family: var(--display);
  font-size: 96px;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}
.detail-shot-text h3 {
  font-family: var(--display);
  font-size: 48px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 32px;
}
.detail-shot-text p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  max-width: 460px;
  margin-bottom: 16px;
}

/* ─── APPLICATIONS ─── */
.applications {
  background: var(--bg);
}
.applications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  margin-top: 8px;
}
.app-cell {
  background: var(--bg);
  padding: 44px 40px 48px;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 280px;
  transition: background 0.4s ease;
}
.app-cell:hover { background: var(--surface); }
.app-cell .idx {
  font-family: var(--body);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.app-cell .idx::before {
  content: '';
  width: 18px;
  height: 1px;
  background: var(--accent);
}
.app-cell h3 {
  font-family: var(--display);
  font-size: 26px;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 18px;
}
.app-cell p {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.app-cell .tags {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
}
.app-cell .tag-chip {
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
  padding: 6px 10px;
  border: 1px solid var(--hairline-strong);
  font-variant-numeric: tabular-nums;
}
.applications-footnote {
  margin-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 32px;
  flex-wrap: wrap;
  border-top: 1px solid var(--hairline);
  padding-top: 24px;
}
.applications-footnote .note {
  font-size: 13px;
  color: var(--text-dim);
  max-width: 560px;
  line-height: 1.6;
}
.applications-footnote .note strong { color: #fff; font-weight: 400; }
.applications-footnote .stamp {
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

@media (max-width: 1100px) {
  .applications-grid { grid-template-columns: 1fr; }
  .app-cell { min-height: 0; padding: 32px 24px; min-width: 0; }
}

/* ─── ABOUT ─── */
.about {
  background: var(--bg);
  padding-top: 40px;
  padding-bottom: 40px;
}

/* hero — массивный заголовок-обложка */
.about-hero {
  display: grid;
  grid-template-columns: 200px 1fr;
  align-items: end;
  gap: 48px;
  padding: 120px 0 64px;
  border-bottom: 1px solid var(--hairline);
}
.about-hero-marker {
  width: 100%;
  height: 1px;
  background: var(--accent);
  margin-bottom: 28px;
}
.about-hero h2 {
  font-family: var(--display);
  font-size: clamp(72px, 13vw, 200px);
  line-height: 0.86;
  letter-spacing: -0.04em;
  color: #fff;
  margin: 0;
}

/* лид — крупный текст с декоративной риской слева */
.about-lede-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  padding: 80px 0 100px;
  border-bottom: 1px solid var(--hairline);
  align-items: start;
}
.about-lede-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 14px;
}
.about-lede-meta .meta-tick {
  width: 28px;
  height: 1px;
  background: var(--hairline-strong);
}
.about-lede-meta .meta-tick:first-child {
  background: var(--accent);
  width: 56px;
}
.about-lede-row .lede {
  font-family: var(--display);
  font-size: clamp(24px, 2.4vw, 38px);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: #fff;
  max-width: 1100px;
  font-weight: 400;
}

/* треки — три полноширинные горизонтальные карточки */
.about-tracks {
  display: flex;
  flex-direction: column;
}
.about-track {
  display: grid;
  grid-template-columns: 200px 1fr 1.2fr;
  gap: 48px;
  padding: 88px 0;
  border-bottom: 1px solid var(--hairline);
  align-items: start;
  position: relative;
  transition: background 0.5s ease;
}
.about-track:hover { background: var(--surface); }
.about-track:hover .track-num { color: var(--accent); }

.about-track .track-num {
  font-family: var(--display);
  font-size: clamp(72px, 8vw, 128px);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  transition: color 0.4s ease;
}

.about-track .track-body h3 {
  font-family: var(--display);
  font-size: clamp(32px, 3.4vw, 48px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  color: #fff;
  margin: 18px 0 0;
}

.about-track .track-text {
  padding-top: 28px;
}
.about-track .track-text p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  max-width: 620px;
}

@media (max-width: 1100px) {
  .about-hero,
  .about-lede-row,
  .about-track {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 56px 0;
  }
  .about-hero { padding-top: 80px; }
  .about-hero-marker { width: 56px; margin-bottom: 0; }
  .about-lede-row .lede { font-size: 22px; }
  .about-lede-meta { flex-direction: row; padding-top: 0; }
  .about-track .track-num { font-size: 64px; }
  .about-track .track-body h3 { margin-top: 0; }
  .about-track .track-text { padding-top: 0; }
}

/* ─── CTA / FOOTER ─── */
.cta {
  border-top: 1px solid var(--hairline);
  padding: 140px 0 80px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.cta-mega {
  font-family: var(--display);
  font-size: clamp(80px, 13vw, 220px);
  line-height: 0.84;
  letter-spacing: -0.04em;
  color: #fff;
  margin-bottom: 80px;
}
.cta-mega .accent { color: var(--accent); }

/* ─── CTA LEAD: heading + form split ─── */
.cta-lead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 560px);
  gap: 64px;
  align-items: start;
  margin-bottom: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--hairline);
}
.cta-lead > * { min-width: 0; }
.cta-lead .cta-mega {
  font-size: clamp(64px, 8.5vw, 160px);
  line-height: 0.88;
  overflow-wrap: break-word;
  margin-bottom: 40px;
}
.cta-sub {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  max-width: 520px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-dim);
  padding-top: 8px;
}
.cta-sub-tick {
  width: 32px;
  height: 1px;
  background: var(--accent);
  margin-top: 12px;
  flex: 0 0 auto;
}

/* ─── FORM ─── */
.cta-form {
  position: relative;
  padding: 36px 36px 32px;
  border: 1px solid var(--hairline);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.cta-form-head {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--body);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.cta-form-tag {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.cta-form-rule {
  flex: 1;
  height: 1px;
  background: var(--hairline);
}

.cta-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 28px;
}
.cta-field--wide { grid-column: 1 / -1; }

.cta-field {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.cta-field-label {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.cta-form input,
.cta-form textarea {
  font: inherit;
  font-family: var(--body);
  font-size: 15px;
  color: #fff;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--hairline-strong);
  padding: 8px 0 12px;
  outline: none;
  width: 100%;
  border-radius: 0;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.cta-form textarea {
  resize: vertical;
  min-height: 72px;
  line-height: 1.5;
}
.cta-form input::placeholder,
.cta-form textarea::placeholder {
  color: var(--text-faint);
  font-family: var(--body);
}
.cta-form input:focus,
.cta-form textarea:focus,
.cta-form input:hover,
.cta-form textarea:hover {
  border-bottom-color: var(--accent);
}
.cta-form input:user-invalid,
.cta-form textarea:user-invalid {
  border-bottom-color: var(--accent);
}

/* ─── footer of form: consent + submit ─── */
.cta-form-foot {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  padding-top: 8px;
  border-top: 1px solid var(--hairline);
  margin-top: 4px;
  padding-top: 24px;
}
.cta-consent {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}
.cta-consent input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.cta-consent-box {
  width: 14px;
  height: 14px;
  border: 1px solid var(--hairline-strong);
  flex: 0 0 auto;
  position: relative;
  margin-top: 2px;
  transition: border-color 0.2s, background 0.2s;
}
.cta-consent input:checked + .cta-consent-box {
  background: var(--accent);
  border-color: var(--accent);
}
.cta-consent input:checked + .cta-consent-box::after {
  content: '';
  position: absolute;
  inset: 3px;
  background: #000;
  clip-path: polygon(14% 50%, 0 64%, 38% 100%, 100% 22%, 86% 10%, 36% 72%);
}
.cta-consent-text {
  font-size: 11px;
  line-height: 1.5;
  color: var(--text-dim);
  max-width: 320px;
}

.cta-submit {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 18px 28px;
  background: var(--accent);
  color: #000;
  border: 1px solid var(--accent);
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
  font-weight: 600;
}
.cta-submit:hover {
  background: transparent;
  color: var(--accent);
}
.cta-submit:active { transform: translateY(1px); }
.cta-submit-arrow {
  font-family: var(--body);
  font-size: 18px;
  line-height: 1;
  transition: transform 0.3s ease;
}
.cta-submit:hover .cta-submit-arrow { transform: translateX(4px); }

/* success state */
.cta-form-success {
  display: none;
  position: absolute;
  inset: 0;
  background: var(--surface);
  border: 1px solid var(--accent);
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 48px 48px;
  gap: 20px;
}
.cta-form.is-success .cta-form-head,
.cta-form.is-success .cta-form-grid,
.cta-form.is-success .cta-form-foot { visibility: hidden; }
.cta-form.is-success .cta-form-success { display: flex; }
.cta-form-success-mark {
  width: 48px;
  height: 48px;
  border: 1px solid var(--accent);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.cta-form-success-title {
  font-family: var(--display);
  font-size: 24px;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
  font-weight: 600;
}
.cta-form-success-sub {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
  max-width: 380px;
}

.cta-contacts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 48px 0;
  margin-bottom: 80px;
}
.cta-contact .label {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.cta-contact .val {
  font-family: var(--display);
  font-size: 28px;
  color: #fff;
  letter-spacing: -0.01em;
  transition: color 0.2s;
}
.cta-contact a:hover .val { color: var(--accent); }

.footer {
  display: flex;
  align-items: end;
  justify-content: space-between;
  padding: 40px 0 0;
  border-top: 1px solid var(--hairline);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}
.footer-brand svg { width: 56px; height: auto; color: var(--accent); }
.footer-brand .name {
  font-family: var(--display);
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
}
.footer-brand .sub {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 4px;
}
.footer-meta {
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  text-align: right;
  line-height: 1.8;
}

/* ─── REVEAL ANIMATIONS ─── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in {
  opacity: 1;
  transform: none;
}
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }

/* ─── RESPONSIVE ─── */
@media (max-width: 1240px) {
  .cta-lead { grid-template-columns: minmax(0, 1fr) minmax(400px, 480px); }
  .cta-lead .cta-form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 1100px) {
  .cta-lead { grid-template-columns: 1fr; gap: 56px; padding-bottom: 56px; margin-bottom: 56px; }
  .cta-lead .cta-mega { font-size: clamp(64px, 11vw, 140px); }
}
@media (max-width: 1100px) {
  .hero { grid-template-columns: 1fr; padding-top: 120px; min-height: auto; }
  .hero-figure { min-height: 60vh; }
  .hero-marker { display: none; }
  .section-head { grid-template-columns: 1fr; gap: 24px; margin-bottom: 56px; }
  .anatomy-row, .anatomy-row:nth-child(even) { grid-template-columns: 1fr; gap: 40px; }
  .anatomy-row:nth-child(even) .anatomy-figure { order: 0; }
  .config-grid { grid-template-columns: 1fr; gap: 56px; }
  .config-readout { position: static; }
  .contents-grid { grid-template-columns: 1fr; gap: 56px; }
  .contents-aside { position: static; }
  .detail-shot-inner { grid-template-columns: 1fr; }
  .detail-shot-text { padding: 56px 32px; }
  .cta-contacts { grid-template-columns: 1fr; gap: 24px; }
  .cta-form { padding: 28px 24px 24px; }
  .cta-form-grid { grid-template-columns: 1fr; gap: 20px; }
  .cta-form-foot { grid-template-columns: 1fr; gap: 20px; align-items: stretch; }
  .cta-submit { justify-content: center; width: 100%; }
  .cta-form-success { padding: 32px 24px; }
  .nav { padding: 18px 24px; }
  .nav-links { display: none; }
  .container { padding: 0 24px; }
  .hero { padding-left: 24px; padding-right: 24px; }
}