/* MERAKSA TOV — industrial equipment, pumps & engineering supply, Kyiv.
   Bespoke stylesheet, prefix mrk-. Cool-steel / hydro-teal identity.
   Not shared with, and deliberately unlike, any sibling site. */

:root {
  --mrk-bg:        #eaeef2;
  --mrk-surface:   #ffffff;
  --mrk-panel:     #f3f6f8;
  --mrk-panel-2:   #e6ebef;
  --mrk-ink:       #101821;
  --mrk-ink-2:     #46545f;
  --mrk-ink-3:     #6b7883;
  --mrk-steel:     #16222d;
  --mrk-steel-2:   #21313f;
  --mrk-steel-3:   #2d4152;
  --mrk-hydro:     #0e7c8b;
  --mrk-hydro-2:   #14a2b5;
  --mrk-hydro-lt:  #d5eef1;
  --mrk-amber:     #d97318;
  --mrk-amber-2:   #ef8b2b;
  --mrk-line:      #d3dae0;
  --mrk-line-2:    #bcc6ce;
  --mrk-max:       1160px;
  --mrk-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mrk-mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Roboto Mono", Consolas, monospace;
  --mrk-r: 4px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--mrk-sans);
  color: var(--mrk-ink);
  background: var(--mrk-bg);
  line-height: 1.62;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--mrk-hydro); }
h1, h2, h3, h4 { line-height: 1.14; letter-spacing: -.012em; }
:focus-visible { outline: 3px solid var(--mrk-hydro-2); outline-offset: 2px; border-radius: 2px; }

.mrk-skip {
  position: absolute; left: -9999px; top: 0; z-index: 90;
  background: var(--mrk-amber); color: #fff; padding: .65rem 1.1rem;
  font-weight: 600; border-radius: 0 0 6px 0;
}
.mrk-skip:focus { left: 0; }

.mrk-wrap { width: 100%; max-width: var(--mrk-max); margin: 0 auto; padding: 0 1.6rem; }

/* ---------- utility strip ---------- */
.mrk-util {
  background: var(--mrk-steel);
  color: #9db3c1;
  font-size: .74rem;
  letter-spacing: .02em;
}
.mrk-util-in {
  max-width: var(--mrk-max); margin: 0 auto; padding: .42rem 1.6rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.mrk-util-r { display: flex; gap: 1.3rem; align-items: center; }
.mrk-util a { color: var(--mrk-hydro-2); text-decoration: none; }
.mrk-util a:hover { color: #fff; }
.mrk-util .mrk-hide-sm { white-space: nowrap; }

/* ---------- nav ---------- */
.mrk-nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(1.3) blur(8px);
  border-bottom: 1px solid var(--mrk-line);
}
.mrk-nav-in {
  max-width: var(--mrk-max); margin: 0 auto; padding: .7rem 1.6rem;
  display: flex; align-items: center; gap: 1.2rem;
}
.mrk-brand { display: flex; align-items: center; gap: .65rem; text-decoration: none; color: var(--mrk-ink); margin-right: auto; }
.mrk-brand-mark { width: 40px; height: 40px; flex: none; }
.mrk-brand-text b { display: block; font-size: 1.15rem; font-weight: 800; letter-spacing: .06em; }
.mrk-brand-text span { display: block; font-size: .62rem; letter-spacing: .28em; text-transform: uppercase; color: var(--mrk-ink-3); margin-top: 1px; }
.mrk-menu { display: flex; gap: .3rem; }
.mrk-menu a {
  text-decoration: none; color: var(--mrk-ink-2); font-size: .88rem; font-weight: 600;
  padding: .5rem .85rem; border-radius: var(--mrk-r); position: relative;
}
.mrk-menu a:hover { color: var(--mrk-ink); background: var(--mrk-panel); }
.mrk-menu a[aria-current="page"] { color: var(--mrk-hydro); }
.mrk-menu a[aria-current="page"]::after {
  content: ""; position: absolute; left: .85rem; right: .85rem; bottom: .2rem; height: 2px; background: var(--mrk-hydro);
}
.mrk-nav-toggle {
  display: none; margin-left: auto; background: var(--mrk-steel); color: #fff;
  border: 0; border-radius: var(--mrk-r); padding: .5rem .9rem; font: inherit; font-weight: 600; cursor: pointer;
}

/* ---------- buttons ---------- */
.mrk-btn {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--mrk-hydro); color: #fff; text-decoration: none;
  padding: .8rem 1.5rem; border-radius: var(--mrk-r); font-size: .92rem; font-weight: 700;
  letter-spacing: .01em; border: 1px solid var(--mrk-hydro);
  transition: background .15s ease, transform .15s ease;
}
.mrk-btn:hover { background: var(--mrk-hydro-2); transform: translateY(-1px); }
.mrk-btn-ghost { background: transparent; color: var(--mrk-ink); border-color: var(--mrk-line-2); }
.mrk-btn-ghost:hover { background: var(--mrk-surface); border-color: var(--mrk-ink-3); }
.mrk-btn-amber { background: var(--mrk-amber); border-color: var(--mrk-amber); color: #fff; }
.mrk-btn-amber:hover { background: var(--mrk-amber-2); }

/* ---------- hero (dark steel) ---------- */
.mrk-hero {
  background:
    linear-gradient(180deg, var(--mrk-steel) 0%, var(--mrk-steel-2) 100%);
  color: #e7eef3;
  position: relative;
  overflow: hidden;
  border-bottom: 3px solid var(--mrk-hydro);
}
.mrk-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(120deg, #000 20%, transparent 78%);
  opacity: .6;
}
.mrk-hero::after {
  content: ""; position: absolute; right: -120px; bottom: -140px; width: 420px; height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(20,162,181,.32), transparent 62%);
  pointer-events: none;
}
.mrk-hero-in { position: relative; z-index: 1; padding: 4.4rem 0 0; }
.mrk-hero-grid { display: grid; grid-template-columns: 1.55fr 1fr; gap: 2.6rem; align-items: center; }
.mrk-kicker {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--mrk-mono); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--mrk-hydro-2);
}
.mrk-kicker::before { content: ""; width: 30px; height: 2px; background: var(--mrk-amber); }
.mrk-hero h1 {
  font-size: clamp(2.15rem, 5.4vw, 3.7rem); font-weight: 800; margin: 1.1rem 0 1.15rem;
  max-width: 16ch; letter-spacing: -.02em;
}
.mrk-hero h1 em { font-style: normal; color: var(--mrk-hydro-2); }
.mrk-hero-lead { font-size: 1.1rem; color: #b9cad6; max-width: 48ch; margin: 0 0 1.7rem; }
.mrk-hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; }

.mrk-spec {
  border: 1px solid rgba(255,255,255,.14); border-radius: 8px;
  background: rgba(11,20,28,.5); backdrop-filter: blur(3px);
  padding: 1.2rem 1.25rem;
}
.mrk-spec h4 {
  margin: 0 0 .9rem; font-family: var(--mrk-mono); font-size: .68rem; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase; color: #7f97a6;
}
.mrk-spec-row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  padding: .5rem 0; border-bottom: 1px dashed rgba(255,255,255,.12);
  font-size: .88rem;
}
.mrk-spec-row:last-child { border-bottom: 0; }
.mrk-spec-row span:first-child { color: #cfdbe4; }
.mrk-spec-code { font-family: var(--mrk-mono); font-size: .78rem; color: var(--mrk-hydro-2); }

/* hero index strip */
.mrk-index {
  position: relative; z-index: 1; margin-top: 3rem;
  border-top: 1px solid rgba(255,255,255,.12);
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.mrk-index div {
  padding: 1.05rem 0; border-right: 1px solid rgba(255,255,255,.12);
}
.mrk-index div:last-child { border-right: 0; }
.mrk-index dt { font-family: var(--mrk-mono); font-size: .66rem; letter-spacing: .14em; text-transform: uppercase; color: #7f97a6; margin: 0 0 .25rem; }
.mrk-index dd { margin: 0; font-size: 1rem; font-weight: 700; color: #eaf1f5; }

/* ---------- section scaffold ---------- */
.mrk-sec { padding: 4rem 0; }
.mrk-sec-alt { background: var(--mrk-surface); border-top: 1px solid var(--mrk-line); border-bottom: 1px solid var(--mrk-line); }
.mrk-sec-head { max-width: 62ch; margin-bottom: 2.2rem; }
.mrk-tag {
  font-family: var(--mrk-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--mrk-hydro); font-weight: 600;
}
.mrk-sec-head h2 { font-size: clamp(1.6rem, 3.6vw, 2.35rem); font-weight: 800; margin: .55rem 0 .7rem; }
.mrk-sec-head p { margin: 0; color: var(--mrk-ink-2); font-size: 1.02rem; }

/* ---------- product families (spec cards w/ top bar + code) ---------- */
.mrk-fam { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.mrk-fam-card {
  background: var(--mrk-surface); border: 1px solid var(--mrk-line);
  border-radius: 6px; padding: 1.35rem 1.3rem 1.25rem; position: relative;
  border-top: 3px solid var(--mrk-hydro);
  transition: box-shadow .16s ease, transform .16s ease, border-color .16s ease;
}
.mrk-fam-card:nth-child(3n+2) { border-top-color: var(--mrk-amber); }
.mrk-fam-card:nth-child(3n) { border-top-color: var(--mrk-steel-3); }
.mrk-fam-card:hover { transform: translateY(-3px); box-shadow: 0 16px 34px -24px rgba(16,24,33,.55); }
.mrk-fam-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: .85rem; }
.mrk-fam-code { font-family: var(--mrk-mono); font-size: .74rem; color: var(--mrk-ink-3); letter-spacing: .04em; }
.mrk-fam-ic { width: 34px; height: 34px; color: var(--mrk-hydro); }
.mrk-fam-card:nth-child(3n+2) .mrk-fam-ic { color: var(--mrk-amber); }
.mrk-fam-card:nth-child(3n) .mrk-fam-ic { color: var(--mrk-steel-3); }
.mrk-fam-card h3 { font-size: 1.14rem; font-weight: 700; margin: 0 0 .45rem; }
.mrk-fam-card p { margin: 0 0 .9rem; font-size: .92rem; color: var(--mrk-ink-2); }
.mrk-chiprow { display: flex; flex-wrap: wrap; gap: .35rem; }
.mrk-chip {
  font-family: var(--mrk-mono); font-size: .68rem; letter-spacing: .02em;
  background: var(--mrk-panel); border: 1px solid var(--mrk-line); color: var(--mrk-ink-2);
  padding: .18rem .5rem; border-radius: 3px;
}

/* ---------- capabilities (connected steps) ---------- */
.mrk-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: mrkstep; }
.mrk-step {
  padding: 1.5rem 1.4rem 1.5rem 0; position: relative;
}
.mrk-step + .mrk-step { padding-left: 1.6rem; }
.mrk-step::before {
  counter-increment: mrkstep; content: counter(mrkstep, decimal-leading-zero);
  font-family: var(--mrk-mono); font-size: .82rem; color: var(--mrk-hydro); font-weight: 700;
  display: block; margin-bottom: .7rem;
}
.mrk-step::after {
  content: ""; position: absolute; left: 0; top: 1.85rem; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--mrk-hydro) 0 34px, var(--mrk-line) 34px 100%);
}
.mrk-step:last-child::after { background: var(--mrk-hydro); width: 34px; }
.mrk-step h3 { font-size: 1.05rem; font-weight: 700; margin: .3rem 0 .4rem; }
.mrk-step p { margin: 0; font-size: .9rem; color: var(--mrk-ink-2); }

/* ---------- about + registry ---------- */
.mrk-about { display: grid; grid-template-columns: 1.35fr 1fr; gap: 2.6rem; align-items: start; }
.mrk-about h2 { font-size: clamp(1.5rem, 3.4vw, 2.15rem); font-weight: 800; margin: .5rem 0 1rem; }
.mrk-about p { color: var(--mrk-ink-2); margin: 0 0 1rem; }
.mrk-registry {
  background: var(--mrk-steel); color: #d8e3ea; border-radius: 8px; padding: 1.6rem 1.6rem;
  border: 1px solid var(--mrk-steel-3);
}
.mrk-registry h4 { margin: 0 0 1.1rem; font-family: var(--mrk-mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--mrk-hydro-2); }
.mrk-registry dl { margin: 0; display: grid; grid-template-columns: 1fr; gap: .1rem; }
.mrk-registry dt { font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: #7f97a6; margin-top: .85rem; }
.mrk-registry dt:first-child { margin-top: 0; }
.mrk-registry dd { margin: .1rem 0 0; font-size: .94rem; }
.mrk-registry a { color: var(--mrk-hydro-2); }

/* ---------- CTA ---------- */
.mrk-cta { background: var(--mrk-hydro); color: #eafcff; position: relative; overflow: hidden; }
.mrk-cta::after {
  content: ""; position: absolute; left: -60px; top: -60px; width: 260px; height: 260px;
  background: repeating-linear-gradient(45deg, transparent 0 18px, rgba(255,255,255,.07) 18px 20px);
  pointer-events: none;
}
.mrk-cta .mrk-wrap { padding: 3.4rem 1.6rem; position: relative; z-index: 1; text-align: center; }
.mrk-cta h2 { font-size: clamp(1.7rem, 4vw, 2.5rem); font-weight: 800; margin: 0 0 .7rem; }
.mrk-cta p { color: #cbeef4; max-width: 54ch; margin: 0 auto 1.6rem; }
.mrk-cta .mrk-btn { background: #fff; color: var(--mrk-hydro); border-color: #fff; }
.mrk-cta .mrk-btn:hover { background: var(--mrk-steel); color: #fff; border-color: var(--mrk-steel); }

/* ---------- footer ---------- */
.mrk-footer { background: var(--mrk-steel); color: #a8bcc9; padding: 3.2rem 0 1.8rem; }
.mrk-foot-grid { display: grid; grid-template-columns: 2fr 1fr 1.3fr; gap: 2rem; }
.mrk-foot-brand .mrk-brand { color: #fff; margin-bottom: .9rem; }
.mrk-foot-brand .mrk-brand-text span { color: #7f97a6; }
.mrk-footer h4 { color: #eaf1f5; font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 .9rem; }
.mrk-footer p { margin: .25rem 0; font-size: .9rem; }
.mrk-footer ul { list-style: none; margin: 0; padding: 0; }
.mrk-footer li { padding: .2rem 0; font-size: .9rem; }
.mrk-footer a { color: #a8bcc9; text-decoration: none; }
.mrk-footer a:hover { color: var(--mrk-hydro-2); }
.mrk-foot-reg { font-family: var(--mrk-mono); font-size: .82rem; color: #8ba1af; line-height: 1.7; }
.mrk-foot-base {
  border-top: 1px solid var(--mrk-steel-3); margin-top: 2.2rem; padding-top: 1.3rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem;
  font-size: .78rem; color: #7f97a6;
}

/* ---------- interior pages ---------- */
.mrk-page-hero {
  background: linear-gradient(180deg, var(--mrk-steel) 0%, var(--mrk-steel-2) 100%);
  color: #e7eef3; border-bottom: 3px solid var(--mrk-hydro); position: relative; overflow: hidden;
}
.mrk-page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(0deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 46px 46px; mask-image: linear-gradient(120deg, #000 10%, transparent 70%); opacity: .5;
}
.mrk-page-hero .mrk-wrap { position: relative; z-index: 1; padding: 3.4rem 1.6rem 2.6rem; }
.mrk-page-hero h1 { font-size: clamp(1.9rem, 4.6vw, 3rem); font-weight: 800; margin: .8rem 0 .6rem; }
.mrk-page-hero p { color: #b9cad6; max-width: 62ch; margin: 0; font-size: 1.05rem; }

/* product detail rows (products.html) */
.mrk-detail { display: grid; grid-template-columns: 210px 1fr; gap: 1.4rem 2rem; }
.mrk-detail + .mrk-detail { margin-top: 1.4rem; padding-top: 1.4rem; border-top: 1px solid var(--mrk-line); }
.mrk-detail-aside { }
.mrk-detail-aside .mrk-fam-code { display: block; margin-bottom: .5rem; }
.mrk-detail-aside h3 { font-size: 1.25rem; font-weight: 800; margin: 0 0 .5rem; }
.mrk-detail-body p { color: var(--mrk-ink-2); margin: 0 0 .9rem; }
.mrk-detail-body ul { margin: 0; padding-left: 1.15rem; color: var(--mrk-ink-2); }
.mrk-detail-body li { margin: .25rem 0; }

/* industries grid */
.mrk-ind { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.mrk-ind-card {
  background: var(--mrk-surface); border: 1px solid var(--mrk-line); border-left: 4px solid var(--mrk-hydro);
  border-radius: 4px; padding: 1.3rem 1.3rem;
}
.mrk-ind-card:nth-child(4n+2) { border-left-color: var(--mrk-amber); }
.mrk-ind-card:nth-child(4n+3) { border-left-color: var(--mrk-steel-3); }
.mrk-ind-card h3 { font-size: 1.08rem; font-weight: 700; margin: 0 0 .45rem; }
.mrk-ind-card p { margin: 0; font-size: .9rem; color: var(--mrk-ink-2); }

/* contact */
.mrk-contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.6rem; }
.mrk-contact-card {
  background: var(--mrk-surface); border: 1px solid var(--mrk-line); border-radius: 6px; padding: 1.5rem;
}
.mrk-contact-card h3 { font-size: 1.1rem; font-weight: 700; margin: 0 0 .5rem; }
.mrk-contact-card p { color: var(--mrk-ink-2); margin: .2rem 0; font-size: .95rem; }
.mrk-contact-card a { font-weight: 600; }
.mrk-kv { display: grid; grid-template-columns: auto 1fr; gap: .45rem 1.1rem; margin: .3rem 0 0; font-size: .92rem; }
.mrk-kv dt { color: var(--mrk-ink-3); font-family: var(--mrk-mono); font-size: .78rem; }
.mrk-kv dd { margin: 0; color: var(--mrk-ink); }

/* prose (privacy) */
.mrk-prose { max-width: 74ch; }
.mrk-prose h2 { font-size: 1.35rem; font-weight: 700; margin: 2.1rem 0 .6rem; color: var(--mrk-ink); }
.mrk-prose h3 { font-size: 1.05rem; font-weight: 700; margin: 1.4rem 0 .4rem; }
.mrk-prose p, .mrk-prose li { color: var(--mrk-ink-2); }
.mrk-prose ul { padding-left: 1.2rem; }
.mrk-prose li { margin: .3rem 0; }
.mrk-prose a { color: var(--mrk-hydro); }
.mrk-note {
  font-family: var(--mrk-mono); font-size: .82rem; color: var(--mrk-ink-2);
  border-left: 3px solid var(--mrk-amber); background: var(--mrk-panel);
  padding: .7rem .9rem; margin: 1.5rem 0; border-radius: 0 4px 4px 0;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .mrk-hero-grid { grid-template-columns: 1fr; gap: 1.8rem; }
  .mrk-index { grid-template-columns: repeat(2, 1fr); }
  .mrk-index div:nth-child(2) { border-right: 0; }
  .mrk-index div:nth-child(1), .mrk-index div:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,.12); }
  .mrk-fam, .mrk-ind { grid-template-columns: repeat(2, 1fr); }
  .mrk-steps { grid-template-columns: repeat(2, 1fr); }
  .mrk-step, .mrk-step + .mrk-step { padding-left: 0; padding-right: 1.2rem; }
  .mrk-step::after { display: none; }
  .mrk-about, .mrk-contact-grid { grid-template-columns: 1fr; }
  .mrk-foot-grid { grid-template-columns: 1fr 1fr; }
  .mrk-detail { grid-template-columns: 1fr; gap: .6rem; }
}
@media (max-width: 620px) {
  .mrk-util .mrk-hide-sm { display: none; }
  .mrk-nav-toggle { display: inline-block; }
  .mrk-menu {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; gap: .15rem; background: var(--mrk-surface);
    border-bottom: 1px solid var(--mrk-line); padding: .5rem 1.6rem 1rem;
  }
  .mrk-menu.mrk-open { display: flex; }
  .mrk-menu a[aria-current="page"]::after { display: none; }
  .mrk-fam, .mrk-ind, .mrk-steps { grid-template-columns: 1fr; }
  .mrk-foot-grid { grid-template-columns: 1fr; }
  .mrk-index { grid-template-columns: 1fr; }
  .mrk-index div { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.12); }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}