/* ЦветСплав — инженерный швейцарский ч/б
   Токены см. CLAUDE.md проекта. Единственный цвет страницы — металл на фото. */

:root {
  --paper: #FCFCFA;
  --ink: #111110;
  --graphite: #5F5E59;
  --line: #E4E3DD;
  --line-strong: #111110;
  --footer-bg: #161614;
  --footer-ink: #F4F3EF;
  --footer-muted: #8B8A84;
  --max-w: 1280px;
  --gutter: clamp(20px, 4vw, 56px);
  --display: 'Geologica', system-ui, sans-serif;
  --text: 'Golos Text', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--text);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  position: relative;
}
/* бумажное зерно */
body::after {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
}

.wrap { max-width: var(--max-w); margin: 0 auto; padding-inline: var(--gutter); }
.mono { font-family: var(--mono); font-weight: 400; letter-spacing: .08em; }

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }

::selection { background: var(--ink); color: var(--paper); }

:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.ftr :focus-visible { outline-color: var(--footer-ink); }

.skip {
  position: absolute; left: var(--gutter); top: -48px;
  z-index: 10000;
  background: var(--ink); color: var(--paper);
  font-size: 11px; letter-spacing: .12em;
  padding: 10px 16px;
  transition: top .15s;
}
.skip:focus-visible { top: 10px; }

/* ---------- КНОПКИ ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .7em;
  background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: 13px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  padding: 16px 26px;
  border: 1px solid var(--ink);
  transition: background .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn:hover { background: var(--paper); color: var(--ink); }
.btn__arr { font-family: var(--text); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--big { padding: 20px 34px; font-size: 14px; }

.kicker {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: .18em; color: var(--graphite);
  text-transform: uppercase;
}
.stock__num { color: var(--ink); font-weight: 500; margin-right: .9em; }

/* ---------- ШАПКА ---------- */
.hdr { border-bottom: 1px solid var(--line-strong); }
.hdr__in {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: 18px;
}
.hdr__brand { display: flex; flex-direction: column; gap: 3px; }
.hdr__logo {
  font-family: var(--display); font-weight: 800; font-size: 24px;
  letter-spacing: .02em; line-height: 1;
}
.hdr__sub { font-size: 10px; color: var(--graphite); letter-spacing: .22em; }
.hdr__contacts { display: flex; align-items: baseline; gap: 28px; }
.hdr__phone {
  font-family: var(--display); font-weight: 600; font-size: 20px;
  letter-spacing: .01em;
  border-bottom: 2px solid transparent;
  transition: border-color .15s;
}
.hdr__phone:hover { border-color: var(--ink); }
.hdr__mail { font-size: 12px; color: var(--graphite); letter-spacing: .06em; }
.hdr__mail:hover { color: var(--ink); }

/* ---------- ПОЛОСА НАЛИЧИЯ ---------- */
.stock { border-bottom: 1px solid var(--line); background: var(--paper); }
.stock__in {
  display: flex; align-items: center; gap: 28px;
  padding-block: 16px;
}
.stock__label {
  font-family: var(--display); font-weight: 600; font-size: 18px;
  white-space: nowrap;
}
.stock__note { font-size: 11px; color: var(--graphite); flex: 1; }
@media (max-width: 720px) { .stock__note { display: none; } }

/* ---------- HERO (сплит: типографика + фото) ---------- */
.hero {
  position: relative;
  border-bottom: 1px solid var(--line-strong);
  min-height: clamp(520px, 80vh, 840px);
  display: grid;
  align-items: center;
  overflow: hidden;
}
/* инженерная сетка-фон, гаснет к фото */
.hero::before {
  content: '';
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(90deg, #000 0%, #000 42%, transparent 68%);
          mask-image: linear-gradient(90deg, #000 0%, #000 42%, transparent 68%);
  opacity: .7;
}
.hero__photo {
  position: absolute; top: 0; right: 0; bottom: 0; z-index: 1;
  width: clamp(280px, 35vw, 560px);
  overflow: hidden;
  border-left: 1px solid var(--line-strong);
  background: #E8E7E3;
}
.hero__photo img {
  width: 100%; height: 118%;
  position: relative; top: -9%;
  object-fit: cover; object-position: center;
  will-change: transform;
}
.hero__seam {
  position: absolute; z-index: 3;
  right: calc(clamp(280px, 35vw, 560px) + 15px);
  bottom: 24px;
  writing-mode: vertical-rl; transform: rotate(180deg);
  font-size: 10px; letter-spacing: .26em; color: var(--graphite);
}
.hero__type {
  position: relative; z-index: 2;
  width: 100%;
  padding-left: max(var(--gutter), calc(50vw - var(--max-w) / 2 + var(--gutter)));
  padding-right: clamp(300px, 39vw, 600px);
  padding-block: clamp(40px, 7vw, 96px);
}
.hero__h1 {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(40px, 4.9vw, 72px);
  line-height: .96; letter-spacing: -.02em;
  text-transform: uppercase;
  margin-block: 20px 26px;
}
.hero__line { display: block; white-space: nowrap; }
.hero__lead {
  font-size: clamp(17px, 1.6vw, 21px);
  max-width: 26em; color: var(--ink);
}
.hero__cta { display: flex; align-items: center; gap: 22px; margin-top: 34px; flex-wrap: wrap; }
.hero__cta-link {
  font-size: 12px; font-weight: 500; letter-spacing: .14em;
  border-bottom: 1px solid var(--ink); padding-bottom: 3px;
  transition: opacity .15s;
}
.hero__cta-link:hover { opacity: .55; }

/* ---------- МЕХАНИЧЕСКАЯ ОБРАБОТКА ---------- */
.mech { border-bottom: 1px solid var(--line); }
.mech__in {
  display: flex; align-items: baseline; gap: clamp(14px, 2vw, 28px);
  padding-block: 22px; flex-wrap: wrap;
}
.mech__plus { font-size: 22px; color: var(--graphite); line-height: 1; }
.mech__h {
  font-family: var(--display); font-weight: 600; font-size: clamp(18px, 2vw, 24px);
  white-space: nowrap;
}
.mech__p { font-size: 15px; color: var(--graphite); flex: 1; min-width: 220px; }
.mech__link {
  font-size: 12px; font-weight: 500; letter-spacing: .14em;
  border-bottom: 1px solid var(--ink); padding-bottom: 3px;
  white-space: nowrap; transition: opacity .15s;
}
.mech__link:hover { opacity: .55; }

/* ---------- ТИКЕР МАРОК ---------- */
.marks { border-top: 1px solid var(--line); overflow: hidden; }
.marks__track {
  display: flex; width: max-content;
  animation: marks-scroll 64s linear infinite;
}
.marks:hover .marks__track { animation-play-state: paused; }
.marks__set {
  display: flex; gap: 34px; padding-right: 34px;
  padding-block: 12px;
  font-size: 11px; color: var(--graphite);
  white-space: nowrap;
}
@keyframes marks-scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .marks__track { animation: none; }
}

/* ---------- ПРЕИМУЩЕСТВА ---------- */
.why { border-bottom: 1px solid var(--line-strong); padding-block: clamp(44px, 7vw, 90px); }
.why__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(24px, 3vw, 44px);
  margin-top: 38px;
}
.why__item {
  border-top: 1px solid var(--line-strong);
  padding-top: 18px;
  display: flex; flex-direction: column; gap: 10px;
}
.why__num { font-size: 11px; color: var(--graphite); }
.why__h {
  font-family: var(--display); font-weight: 600;
  font-size: 19px; line-height: 1.2;
}
.why__p { font-size: 14.5px; color: var(--graphite); }

/* ---------- КАТАЛОГ ---------- */
.cat { padding-top: clamp(44px, 7vw, 90px); }
.cat > .wrap { padding-bottom: 26px; }
.cat__list { border-top: 1px solid var(--line-strong); counter-reset: cat; }
.cat__row { border-bottom: 1px solid var(--line); position: relative; }
.cat__row:last-child { border-bottom: 1px solid var(--line-strong); }
.cat__in {
  display: grid;
  grid-template-columns: 70px 1fr minmax(280px, 420px);
  align-items: center;
  gap: clamp(20px, 3vw, 48px);
  padding-block: clamp(26px, 3.5vw, 44px);
}
.cat__num { font-size: 13px; color: var(--graphite); align-self: start; padding-top: 10px; }
.cat__h {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(30px, 4.6vw, 64px);
  line-height: .98; letter-spacing: -.015em;
  transition: letter-spacing .25s ease;
}
.cat__row:hover .cat__h { letter-spacing: .002em; }
.cat__forms { margin-top: 14px; font-size: 15.5px; color: var(--ink); }
.cat__marks { margin-top: 8px; font-size: 11px; color: var(--graphite); letter-spacing: .12em; }
.cat__media {
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 3 / 2;
  background: #E8E7E3;
}
.cat__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  transition: transform .5s cubic-bezier(.2,.6,.2,1);
  will-change: transform;
}
.cat__row:hover .cat__media img { transform: scale(1.0); }

/* ---------- CTA ---------- */
.cta { padding-block: clamp(56px, 9vw, 110px); border-bottom: 1px solid var(--line-strong); }
.cta__in { display: flex; flex-direction: column; align-items: flex-start; gap: 28px; }
.cta__h {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(32px, 5vw, 60px); line-height: 1.02;
  letter-spacing: -.015em;
  max-width: 14em;
}
.cta__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.cta__note { font-size: 11px; color: var(--graphite); }

/* ---------- ФУТЕР ---------- */
.ftr { background: var(--footer-bg); color: var(--footer-ink); }
.ftr a:hover { opacity: .65; }
.ftr__top {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.4fr;
  gap: clamp(32px, 5vw, 72px);
  padding-block: clamp(44px, 6vw, 76px) clamp(32px, 4vw, 56px);
}
.ftr__logo {
  font-family: var(--display); font-weight: 800; font-size: 26px;
  letter-spacing: .02em;
}
.ftr__tag { margin-top: 10px; font-size: 14.5px; color: var(--footer-muted); max-width: 18em; }
.ftr__h { font-size: 11px; font-weight: 500; letter-spacing: .2em; color: var(--footer-muted); margin-bottom: 16px; }
.ftr__p { font-size: 15px; margin-bottom: 12px; line-height: 1.5; }
.ftr__p a { border-bottom: 1px solid transparent; transition: opacity .15s; }
.ftr__muted { color: var(--footer-muted); }
.ftr__req { display: flex; flex-direction: column; gap: 7px; font-size: 12px; letter-spacing: .04em; }
.ftr__req > div { display: grid; grid-template-columns: 56px 1fr; gap: 12px; }
.ftr__req dt { color: var(--footer-muted); }
.ftr__req dd { word-break: break-word; }
.ftr__bottom {
  border-top: 1px solid #2A2A27;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding-block: 22px;
  flex-wrap: wrap;
}
.ftr__copy, .ftr__policy { font-size: 11px; color: var(--footer-muted); letter-spacing: .12em; }
.ftr__policy { border-bottom: 1px solid #2A2A27; padding-bottom: 2px; }
.ftr__policy:hover { color: var(--footer-ink); }

/* ---------- РЕВИЛЫ (включаются JS-ом) ---------- */
.js .rv { opacity: 0; transform: translateY(22px); }
.js .rv--in { opacity: 1; transform: none; transition: opacity .7s ease, transform .7s cubic-bezier(.2,.6,.2,1); }
@media (prefers-reduced-motion: reduce) {
  .js .rv { opacity: 1; transform: none; }
}

/* ---------- АДАПТИВ ---------- */
@media (max-width: 980px) {
  .why__grid { grid-template-columns: repeat(2, 1fr); }
  .cat__in { grid-template-columns: 44px 1fr minmax(220px, 300px); }
}
@media (max-width: 760px) {
  .hdr__in { flex-wrap: wrap; gap: 12px; }
  .hdr__mail { display: none; }
  .hdr__phone { font-size: 18px; }
  .hero {
    display: flex; flex-direction: column;
    min-height: 0;
  }
  .hero__type { order: 1; max-width: none; padding-right: 0; padding-block: clamp(32px, 8vw, 52px); }
  .hero__line { white-space: normal; }
  .hero__photo {
    order: 2; position: static; width: 100%;
    aspect-ratio: 16 / 11;
    border-left: 0; border-top: 1px solid var(--line-strong);
  }
  .hero::before { -webkit-mask-image: none; mask-image: none; opacity: .5; }
  .hero__seam { display: none; }
  .mech__in { padding-block: 18px; }
  .stock__in { flex-wrap: wrap; gap: 14px; }
  .cat__in {
    grid-template-columns: 1fr;
    grid-template-areas: "num" "media" "body";
    gap: 16px;
  }
  .cat__num { grid-area: num; padding-top: 0; }
  .cat__media { grid-area: media; }
  .cat__in > .cat__body { grid-area: body; }
  .why__grid { grid-template-columns: 1fr; gap: 20px; }
  .ftr__top { grid-template-columns: 1fr; gap: 36px; }
  .ftr__bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- design-review фиксы ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
/* hit-area текстовых ссылок ≥44px без визуального сдвига */
.hdr__phone, .hdr__mail, .hero__cta-link, .mech__link, .ftr__policy, .ftr__p a, .hdr__nav a {
  padding-block: 10px; margin-block: -10px;
  position: relative; z-index: 1;
}
/* цифры реквизитов — табличные */
.ftr__req { font-variant-numeric: tabular-nums; }
/* навигация в шапке */
.hdr__nav { display: flex; gap: 26px; font-size: 12px; letter-spacing: .16em; }
.hdr__nav a { color: var(--graphite); transition: color .15s; }
.hdr__nav a:hover { color: var(--ink); }
@media (max-width: 760px) { .hdr__nav { display: none; } }