/* ІНФРАСФЕРА × RK Infra. Основа: шаблон vertex-sci (моно, капс, тёмний кадр, каскад fadeSlideUp).
   Достройка в стилі основи: один акцент (лайм RK), кольори лінійок тільки як «жила» труби, кути гострі. */

:root {
  --bg: #070c14;
  --bg-2: #0b1320;
  --bg-3: #101b2c;
  --text: #f2f4f7;
  --t90: rgba(242, 244, 247, .9);
  --t70: rgba(242, 244, 247, .72);
  --t60: rgba(242, 244, 247, .62);
  --t40: rgba(242, 244, 247, .44);
  --t20: rgba(242, 244, 247, .2);
  --t10: rgba(242, 244, 247, .1);
  --accent: #a3cf3e;
  --accent-ink: #0a1405;
  --c-heat: #e5483e;
  --c-san: #3d8be0;
  --c-fibre: #f2c230;
  --c-pro: #f28a2e;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --pad: 24px;
  --sec: 96px;
  --font: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}
@media (min-width: 640px) { :root { --pad: 40px; } }
@media (min-width: 768px) { :root { --pad: 64px; --sec: 128px; } }
@media (min-width: 1024px) { :root { --pad: 80px; --sec: 144px; } }

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input { font: inherit; color: inherit; }
.ic { width: 20px; height: 20px; flex: none; }
.ic--xl { width: 36px; height: 36px; color: var(--accent-t); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--accent); color: var(--accent-ink); padding: 12px 16px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap { width: 100%; max-width: 1440px; margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }
.sec { padding: var(--sec) 0; position: relative; }
.h2 {
  font-size: clamp(1.75rem, 4.2vw, 3rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  font-weight: 700;
  max-width: 20ch;
}
.lead { color: var(--t70); font-size: 16px; line-height: 1.65; max-width: 60ch; font-weight: 400; }
@media (min-width: 1024px) { .lead { font-size: 17px; } }
.muted { color: var(--t60); font-size: 16px; font-weight: 400; }
.eyebrow { color: var(--t40); font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase; font-weight: 400; margin-bottom: 24px; }

/* Кнопки (шаблон: прямокутні, капс, розрядка) */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 12px 22px;
  font-size: 13px; letter-spacing: 0.15em; text-transform: uppercase; font-weight: 500;
  border: 1px solid transparent; white-space: nowrap;
  transition: background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease), transform .15s var(--ease);
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn--sm { min-height: 40px; padding: 8px 18px; font-size: 12px; }
.btn--lg { min-height: 56px; padding: 14px 26px; font-size: 13px; }
.btn--wide { width: 100%; }
@media (max-width: 639px) { .btn--wide { white-space: normal; text-align: center; line-height: 1.35; letter-spacing: .1em; } }
.btn--accent { background: var(--accent); color: var(--accent-ink); font-weight: 700; }
.btn--accent:hover { background: #b6dc5a; }
.btn--ghost { border-color: var(--t20); color: var(--text); font-weight: 400; }
.btn--ghost:hover { border-color: rgba(242,244,247,.6); }
.link-btn { color: var(--t60); font-size: 14px; text-decoration: underline; text-underline-offset: 4px; padding: 10px 0; min-height: 44px; }
.link-btn:hover { color: var(--text); }

/* ===== ШАПКА (vertex-sci) ===== */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 50; transition: background-color .3s, backdrop-filter .3s; }
.nav--solid { background: rgba(255, 255, 255, .9); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); }
.nav__row { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
@media (min-width: 768px) { .nav__row { height: 76px; } }
.nav__logo img { height: 34px; width: auto; }
@media (min-width: 768px) { .nav__logo img { height: 40px; } }
.nav__links { display: none; align-items: center; gap: 28px; }
.nav__links a { color: var(--t70); font-size: 12px; text-transform: uppercase; letter-spacing: 0.18em; font-weight: 400; transition: color .2s; }
.nav__links a:hover { color: var(--text); }
.nav__btns { display: none; align-items: center; gap: 12px; }
.nav__call { margin-left: auto; width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--t20); }
.nav__burger { position: relative; z-index: 51; width: 44px; height: 44px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; }
.nav__burger span { display: block; width: 24px; height: 1.5px; background: var(--text); transition: transform .3s var(--ease), opacity .3s var(--ease); }
.nav--open .nav__burger span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav--open .nav__burger span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav--open .nav__burger span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }
@media (min-width: 1180px) {
  .nav__links, .nav__btns { display: flex; }
  .nav__call, .nav__burger { display: none; }
}

.mmenu { position: fixed; inset: 0; z-index: 49; visibility: hidden; }
.mmenu__bg { position: absolute; inset: 0; background: var(--bg); opacity: 0; transition: opacity .5s var(--ease); }
.mmenu__content { position: relative; height: 100%; display: flex; flex-direction: column; justify-content: space-between; padding-top: 96px; padding-bottom: 40px; opacity: 0; transform: translateY(-16px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.mmenu__links { display: flex; flex-direction: column; }
.mmenu__links .mmenu__link { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; border-bottom: 1px solid var(--t10); }
.mmenu__links .mmenu__link span:first-child { font-size: 26px; letter-spacing: -0.02em; font-weight: 400; opacity: 0; transform: translateX(-24px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.mmenu__links .mmenu__link span:last-child { color: var(--t40); font-size: 12px; opacity: 0; transform: translateX(16px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.mmenu__btns { display: flex; flex-direction: column; gap: 12px; opacity: 0; transform: translateY(24px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.mmenu--open { visibility: visible; }
.mmenu--open .mmenu__bg { opacity: 1; }
.mmenu--open .mmenu__content { opacity: 1; transform: none; }
.mmenu--open .mmenu__links span { opacity: 1 !important; transform: none !important; }
.mmenu--open .mmenu__btns { opacity: 1; transform: none; transition-delay: .4s; }
@media (min-width: 1180px) { .mmenu { display: none; } }

/* ===== ПЕРШИЙ ЕКРАН (vertex-sci) ===== */
.hero { position: relative; width: 100%; min-height: 100vh; min-height: 100dvh; overflow: hidden; background: var(--bg); display: flex; }
.hero__video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; pointer-events: none; }
.hero__video::-webkit-media-controls { display: none !important; }
.hero__video::-webkit-media-controls-start-playback-button { display: none !important; -webkit-appearance: none; }
.hero__video::-webkit-media-controls-panel { display: none !important; }
.hero__shade { position: absolute; inset: 0; z-index: 5; pointer-events: none;
  background: linear-gradient(to top, rgba(7,12,20,.92) 0%, rgba(7,12,20,.55) 32%, rgba(7,12,20,.12) 62%, rgba(7,12,20,.35) 100%); }
@media (max-width: 767px) {
  .hero__shade { background: linear-gradient(to top, rgba(7,12,20,.96) 0%, rgba(7,12,20,.82) 42%, rgba(7,12,20,.35) 68%, rgba(7,12,20,.4) 100%); }
}
.hero { background-size: cover; background-position: center; }
.hero.no-autoplay .hero__video { visibility: hidden; }
.hero__content { position: relative; z-index: 10; display: flex; flex-direction: column; justify-content: flex-end; padding-top: 96px; padding-bottom: 40px; }
@media (min-width: 768px) { .hero__content { padding-bottom: 64px; } }
@media (min-width: 1024px) { .hero__content { padding-bottom: 72px; } }
.hero__label { color: var(--t60); font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase; font-weight: 400; margin-bottom: 24px; }
@media (min-width: 768px) { .hero__label { font-size: 12px; margin-bottom: 40px; } }
.hero__cols { display: flex; flex-direction: column; gap: 28px; }
@media (min-width: 1024px) { .hero__cols { flex-direction: row; align-items: flex-end; justify-content: space-between; gap: 64px; } }
.hero__left { flex-shrink: 0; }
.hero__title { color: var(--text); font-weight: 700; font-size: clamp(2.15rem, 8.6vw, 4.6rem); line-height: 0.94; letter-spacing: -0.06em; text-transform: uppercase; }
.hero__meta { margin-top: 20px; display: flex; align-items: center; gap: 16px; color: var(--t60); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 400; }
@media (min-width: 640px) { .hero__meta { font-size: 12px; } }
.hero__divider { width: 32px; height: 1px; background: var(--t20); display: inline-block; }
.hero__right { display: flex; flex-direction: column; gap: 24px; }
@media (min-width: 1024px) { .hero__right { max-width: 460px; gap: 28px; } }
.hero__desc { color: var(--t70); font-size: 16px; line-height: 1.6; font-weight: 400; }
.hero__stats { display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 28px; }
@media (min-width: 640px) { .hero__stats { gap: 44px; } }
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__v { color: var(--text); font-size: 24px; font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; white-space: nowrap; }
@media (min-width: 640px) { .stat__v { font-size: 30px; } }
.stat__l { color: var(--t60); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 400; }
@media (min-width: 640px) { .stat__l { font-size: 12px; } }
.hero__ctas { display: grid; grid-template-columns: 1fr; gap: 12px; }
.hero__ctas .btn--ghost { display: none; }
@media (min-width: 640px) { .hero__ctas { grid-template-columns: auto auto; justify-content: start; } .hero__ctas .btn--ghost { display: inline-flex; } }

/* каскад шаблону */
@keyframes fadeSlideUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes revealLine { from { clip-path: inset(0 100% 0 0); } to { clip-path: inset(0 0 0 0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(1.05); } to { opacity: 1; transform: scale(1); } }
.anim-video { animation: scaleIn 1.8s var(--ease) forwards; opacity: 0; }
.anim-label { animation: fadeIn 1s var(--ease) .4s forwards; opacity: 0; }
.anim-title { animation: fadeSlideUp 1s var(--ease) .6s forwards; opacity: 0; }
.anim-meta { animation: fadeSlideUp .8s var(--ease) 1s forwards; opacity: 0; }
.anim-desc { animation: fadeSlideUp .8s var(--ease) 1.1s forwards; opacity: 0; }
.anim-stat-1 { animation: fadeSlideUp .7s var(--ease) 1.3s forwards; opacity: 0; }
.anim-stat-2 { animation: fadeSlideUp .7s var(--ease) 1.45s forwards; opacity: 0; }
.anim-stat-3 { animation: fadeSlideUp .7s var(--ease) 1.6s forwards; opacity: 0; }
.anim-ctas { animation: fadeSlideUp .7s var(--ease) 1.75s forwards; opacity: 0; }
.anim-divider { animation: revealLine 1s var(--ease) .9s forwards; clip-path: inset(0 100% 0 0); }

/* поява блоків при прокрутці */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
[data-reveal].is-in { opacity: 1; transform: none; }

/* ===== 2. БУДОВА ТРУБИ ===== */
.budova { border-top: 1px solid var(--t10); }
.budova__grid { display: grid; gap: 48px; }
@media (min-width: 1024px) { .budova__grid { grid-template-columns: 5fr 7fr; gap: 64px; align-items: center; } }
.budova__text .h2 { margin-bottom: 24px; }
.budova__fig { position: relative; }
.rozriz { position: relative; }
.rozriz img, .montazh__head img {
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 5%, #000 95%, transparent 100%), linear-gradient(to bottom, transparent 0, #000 6%, #000 94%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image: linear-gradient(to right, transparent 0, #000 5%, #000 95%, transparent 100%), linear-gradient(to bottom, transparent 0, #000 6%, #000 94%, transparent 100%);
  mask-composite: intersect;
}
.rozriz img { width: 100%; }
.dot { position: absolute; width: 34px; height: 34px; margin: -17px 0 0 -17px; display: flex; align-items: center; justify-content: center; background: var(--accent); color: var(--accent-ink); font-size: 12px; font-weight: 800; transform: scale(0); transition: transform .5s var(--ease); }
@media (max-width: 639px) { .dot { width: 26px; height: 26px; margin: -13px 0 0 -13px; font-size: 11px; } }
.dot::after { content: ""; position: absolute; inset: -6px; border: 1px solid var(--accent); opacity: 0; }
.budova__fig.is-in .dot::after { animation: ping 2.4s var(--ease) 1.2s infinite; }
@keyframes ping { 0% { opacity: .9; transform: scale(.8); } 100% { opacity: 0; transform: scale(1.6); } }
.co.is-hot b { color: var(--accent-t); }
.callouts { list-style: none; display: grid; grid-template-columns: 1fr; gap: 0; margin-top: 24px; counter-reset: co; }
.co { counter-increment: co; display: grid; grid-template-columns: 32px 1fr; column-gap: 12px; padding: 14px 0; border-top: 1px solid var(--t10); opacity: 0; transform: translateY(12px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.co::before { content: counter(co, decimal-leading-zero); grid-row: span 2; color: var(--accent-t); font-size: 13px; padding-top: 2px; font-weight: 800; }
.co b { font-weight: 500; font-size: 16px; }
.co span { color: var(--t60); font-size: 16px; font-weight: 400; }
@media (min-width: 640px) { .callouts { grid-template-columns: 1fr 1fr; column-gap: 32px; } }
.budova__fig.is-in .dot { transform: scale(1); }
.budova__fig.is-in .co { opacity: 1; transform: none; }
.budova__fig.is-in .dot--2, .budova__fig.is-in .co--2 { transition-delay: .2s; }
.budova__fig.is-in .dot--3, .budova__fig.is-in .co--3 { transition-delay: .4s; }
.budova__fig.is-in .dot--4, .budova__fig.is-in .co--4 { transition-delay: .6s; }

/* ===== 3. ПІДБІР ===== */
.pidbir { background: var(--bg-2); }
.pidbir__head { margin-bottom: 40px; }
.pidbir__head .h2 { margin-bottom: 16px; }
.quiz { position: relative; border: 1px solid var(--t10); background: var(--bg); padding: 0 20px 24px; max-width: 1040px; --qc: var(--accent); }
@media (min-width: 768px) { .quiz { padding: 0 40px 40px; } }
.quiz__pipe { height: 10px; margin: 0 -20px; background: #000; position: relative; overflow: hidden;
  background-image: repeating-linear-gradient(90deg, rgba(255,255,255,.06) 0 3px, transparent 3px 7px); }
@media (min-width: 768px) { .quiz__pipe { margin: 0 -40px; } }
.quiz__fill { position: absolute; inset: 0; transform-origin: left; transform: scaleX(.3333); background: var(--qc); transition: transform .7s var(--ease), background-color .5s var(--ease); }
.quiz[data-step="2"] .quiz__fill { transform: scaleX(.6667); }
.quiz[data-step="3"] .quiz__fill, .quiz[data-step="4"] .quiz__fill { transform: scaleX(1); }
.quiz__bar { display: flex; align-items: center; justify-content: space-between; min-height: 56px; margin-bottom: 8px; }
.quiz__count { color: var(--t40); font-size: 13px; letter-spacing: .12em; }
.quiz__count b { color: var(--text); font-weight: 500; }
.quiz__back { display: inline-flex; align-items: center; gap: 8px; color: var(--t60); font-size: 13px; text-transform: uppercase; letter-spacing: .12em; min-height: 44px; padding: 0 4px; }
.quiz__back:hover { color: var(--text); }
.q { border: 0; animation: fadeSlideUp .6s var(--ease); }
.q__title { font-size: clamp(1.25rem, 3vw, 1.75rem); font-weight: 700; letter-spacing: -0.03em; margin-bottom: 20px; line-height: 1.2; }
.q__opts { display: grid; gap: 12px; }
@media (min-width: 768px) { .q__opts { grid-template-columns: repeat(3, 1fr); gap: 16px; } }
.opt { position: relative; text-align: left; display: flex; flex-direction: column; gap: 4px; min-height: 72px; padding: 18px 48px 18px 20px; border: 1px solid var(--t20); background: var(--bg-2); transition: border-color .2s, background-color .2s, transform .15s var(--ease); }
@media (min-width: 768px) { .opt { min-height: 120px; justify-content: flex-end; } }
.opt b { font-size: 18px; font-weight: 700; letter-spacing: -0.02em; }
.opt span { color: var(--t60); font-size: 15px; font-weight: 400; }
.opt__ok { position: absolute; right: 16px; top: 18px; color: var(--accent-ink); background: var(--accent); width: 24px; height: 24px; padding: 3px; opacity: 0; transform: scale(.6); transition: opacity .2s, transform .2s var(--ease); }
.opt:hover { border-color: rgba(242,244,247,.5); }
.opt:active { transform: scale(.99); }
.opt.is-on { border-color: var(--accent-t); background: rgba(163,207,62,.08); }
.opt.is-on .opt__ok { opacity: 1; transform: none; }

.res { animation: fadeSlideUp .6s var(--ease); }
.res__card { display: grid; gap: 16px; padding-bottom: 28px; border-bottom: 1px solid var(--t10); margin-bottom: 28px; }
@media (min-width: 768px) { .res__card { grid-template-columns: 300px 1fr; gap: 40px; align-items: center; } }
.res__img { width: 100%; max-width: 300px; }
.res__kicker { color: var(--qc); font-size: 12px; letter-spacing: .3em; text-transform: uppercase; margin-bottom: 8px; }
.res__name { font-size: clamp(2rem, 5vw, 3rem); line-height: 1; letter-spacing: -0.05em; text-transform: uppercase; font-weight: 800; margin-bottom: 12px; position: relative; padding-bottom: 14px; }
.res__name::after { content: ""; position: absolute; left: 0; bottom: 0; width: 72px; height: 4px; background: var(--qc); }
.res__why { color: var(--t70); font-size: 16px; font-weight: 400; margin-bottom: 12px; max-width: 52ch; }
.res__specs { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; }
.res__specs li { border: 1px solid var(--t20); padding: 6px 12px; font-size: 14px; }
.quiz.is-no .res__name { font-size: clamp(1.5rem, 4vw, 2.25rem); }

/* форми */
.form { display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; max-width: 640px; }
.field { display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; }
.field input { width: 100%; min-width: 0; }
.field label, .field__label { font-size: 14px; color: var(--t90); letter-spacing: .02em; }
.field label i, .field__label i { color: var(--t40); font-style: normal; }
.field input[type="tel"], .field input[type="text"] {
  height: 56px; padding: 0 16px; background: var(--bg-2); border: 1px solid var(--t20); color: var(--text); font-size: 17px; border-radius: 0;
  transition: border-color .2s;
}
.field input::placeholder { color: var(--t40); }
.field input:focus { outline: none; border-color: var(--accent-t); }
.field input.is-bad { border-color: #d84315; }
.field__help { color: var(--t60); font-size: 16px; }
.field__err { color: #c62828; font-size: 14px; }
.seg { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
@media (min-width: 640px) { .seg { grid-template-columns: repeat(4, 1fr); } }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: flex; align-items: center; justify-content: center; min-height: 48px; border: 1px solid var(--t20); font-size: 14px; cursor: pointer; transition: border-color .2s, background-color .2s; }
.seg input:checked + span { border-color: var(--accent-t); background: rgba(163,207,62,.1); color: var(--text); }
.seg input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.form__note { color: var(--t60); font-size: 16px; }
.proof { display: flex; gap: 10px; align-items: flex-start; padding-top: 16px; border-top: 1px solid var(--t10); color: var(--t70); font-size: 16px; line-height: 1.5; }
.proof .ic { color: var(--accent-t); margin-top: 1px; }

/* ===== 4. ЛІНІЙКИ ===== */
.liniyky .h2 { margin-bottom: 48px; }
.lines { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 640px) and (max-width: 1099px) { .lines { grid-template-columns: 1fr 1fr; gap: 16px; } }
@media (min-width: 1100px) { .lines { grid-auto-flow: row; grid-template-columns: repeat(6, 1fr); overflow: visible; margin: 0; padding: 0; } .line { grid-column: span 2; } .line:nth-child(4) { grid-column: 2 / span 2; } }
.line { position: relative; display: flex; flex-direction: column; background: var(--bg-2); border: 1px solid var(--t10); padding: 28px 24px 24px; overflow: hidden; }
@media (max-width: 639px) {
  .line { display: grid; grid-template-columns: 112px minmax(0, 1fr); column-gap: 16px; padding: 20px 16px 16px; }
  .line img { grid-row: 1 / span 2; width: 112px; margin: 0; align-self: start; }
  .line__name { font-size: 18px; margin: 4px 0 6px; }
  .line__use { min-height: 0; margin-bottom: 12px; font-size: 16px; }
  .line__specs { grid-column: 1 / -1; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 16px; margin: 4px 0 16px; padding-top: 12px; border-top: 1px solid var(--t10); }
  .line__specs dd { font-size: 15px; }
  .btn--line { grid-column: 1 / -1; }
}
.line__vein { position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--c); transform: scaleX(0); transform-origin: left; transition: transform 1.2s var(--ease) .2s; }
.line__vein--double { height: 7px; background: linear-gradient(var(--c) 0 3px, transparent 3px 4px, var(--c) 4px 7px); }
.line.is-in .line__vein { transform: scaleX(1); }
.line img { width: 100%; max-width: 320px; margin: 0 auto 20px; aspect-ratio: 561 / 437; object-fit: contain; transition: transform .6s var(--ease); }
.line:hover img { transform: rotate(-3deg) scale(1.03); }
.line__name { font-size: 22px; letter-spacing: -0.03em; text-transform: uppercase; font-weight: 800; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.line__name::before { content: ""; width: 10px; height: 10px; background: var(--c); flex: none; }
.line__use { color: var(--t70); font-size: 16px; font-weight: 400; margin-bottom: 20px; min-height: 3.2em; }
.line__specs { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; margin-bottom: 24px; }
.line__specs dt { color: var(--t40); font-size: 12px; text-transform: uppercase; letter-spacing: .1em; }
.line__specs dd { font-size: 17px; font-weight: 500; }
.line__coil { grid-column: 1 / -1; padding-top: 10px; border-top: 1px solid var(--t10); }
.line__coil dd { color: var(--text); font-weight: 700; }
.sizes { grid-column: 1 / -1; margin: -8px 0 20px; border-top: 1px solid var(--t10); }
.sizes summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; min-height: 44px; font-size: 13px; text-transform: uppercase; letter-spacing: .12em; color: var(--t70); }
.sizes summary::-webkit-details-marker { display: none; }
.sizes summary .ic { width: 18px; height: 18px; color: var(--accent-t); transition: transform .3s var(--ease); }
.sizes[open] summary .ic { transform: rotate(45deg); }
.sizes table { width: 100%; border-collapse: collapse; font-size: 15px; margin-bottom: 8px; }
.sizes th { text-align: left; font-weight: 400; font-size: 12px; color: var(--t40); text-transform: uppercase; letter-spacing: .08em; padding: 6px 0; }
.sizes td { padding: 6px 0; border-top: 1px solid var(--t10); font-variant-numeric: tabular-nums; }
.sizes td:first-child { font-weight: 700; }
.sizes th:last-child, .sizes td:last-child { text-align: right; }
.sizes__n { font-size: 14px; color: var(--t60); margin-bottom: 4px; }
@media (max-width: 639px) { .sizes { margin-top: -4px; } }
.btn--line { margin-top: auto; border-color: var(--t20); justify-content: space-between; font-weight: 400; }
.btn--line:hover { border-color: var(--c); color: var(--text); }

/* ===== 5. ГНУЧКА ЧИ СТАЛЬ ===== */
.stal { background: var(--bg-2); }
.stal .h2 { margin-bottom: 48px; max-width: 22ch; }
.race { display: grid; gap: 32px; margin-bottom: 64px; }
.race__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 16px; margin-bottom: 14px; }
.race__head b { font-size: 16px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.race__head span { color: var(--t60); font-size: 15px; }
.race__track { position: relative; height: 22px; display: flex; gap: 2px; }
.race__row--steel .race__track i { flex: 1; height: 100%; background: #3b4554; position: relative; opacity: .25; transition: opacity .2s; }
.race__row--steel .race__track i::after { content: ""; position: absolute; right: -3px; top: 50%; width: 6px; height: 6px; margin-top: -3px; border-radius: 50%; background: #ff6b3d; box-shadow: 0 0 8px 2px rgba(255,107,61,.7); opacity: 0; transition: opacity .2s; z-index: 1; }
.race__row--steel .race__track i:last-child::after { display: none; }
.race__row--steel .race__track i.on { opacity: 1; }
.race__row--steel .race__track i.on::after { opacity: 1; }
.race__flex { position: absolute; inset: 0; background: #0d0f12; border-top: 1px solid rgba(255,255,255,.1);
  background-image: repeating-linear-gradient(90deg, rgba(255,255,255,.08) 0 3px, transparent 3px 7px), linear-gradient(transparent 46%, var(--accent) 46% 56%, transparent 56%);
  transform: scaleX(0); transform-origin: left; transition: transform 2.6s var(--ease); }
.race.is-run .race__flex { transform: scaleX(1); }
.race__count { margin-top: 10px; color: var(--t60); font-size: 15px; }
.race__count b { color: var(--text); font-size: 28px; font-weight: 800; letter-spacing: -0.03em; margin-right: 6px; }
.race__row--steel .race__count b { color: #d9541e; }
.race__row--flex .race__count b { color: var(--accent-t); }

.cmp { border-top: 1px solid var(--t10); }
.cmp__row { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 16px; padding: 18px 0; border-bottom: 1px solid var(--t10); }
.cmp__row > span { grid-column: 1 / -1; color: var(--t40); font-size: 12px; text-transform: uppercase; letter-spacing: .14em; }
.cmp__row p { font-size: 16px; font-weight: 400; color: var(--t60); }
.cmp__row p.cmp__flex { color: var(--text); font-weight: 400; }
.cmp__row--head { padding: 0 0 14px; }
.cmp__row--head > span { display: none; }
.cmp__row--head b { font-size: 13px; text-transform: uppercase; letter-spacing: .12em; color: var(--t60); }
.cmp__row--head b.cmp__flex { color: var(--accent-t); }
@media (min-width: 768px) {
  .cmp__row { grid-template-columns: 200px 1fr 1fr; gap: 24px; align-items: baseline; }
  .cmp__row > span { grid-column: auto; }
  .cmp__row--head > span { display: block; }
}
.stal__foot { margin-top: 48px; display: grid; gap: 24px; align-items: center; }
.stal__foot p { color: var(--t70); font-size: 16px; font-weight: 400; max-width: 60ch; }
@media (min-width: 1024px) { .stal__foot { grid-template-columns: 1fr auto; gap: 48px; } }

/* ===== 6. МОНТАЖ ===== */
.montazh__grid { display: grid; gap: 48px; }
@media (min-width: 1024px) { .montazh__grid { grid-template-columns: 5fr 7fr; gap: 80px; } }
.montazh__head .h2 { margin-bottom: 32px; }
.montazh__head img { width: 100%; max-width: 560px; margin-bottom: 20px; }
.steps { list-style: none; position: relative; display: grid; gap: 0; }
.steps::before { content: ""; z-index: 0; position: absolute; left: 27px; top: 28px; bottom: 28px; width: 2px; background: var(--t10); }
.steps::after { content: ""; z-index: 0; position: absolute; left: 27px; top: 28px; bottom: 28px; width: 2px; background: var(--accent); transform: scaleY(0); transform-origin: top; transition: transform 2s var(--ease) .3s; }
.steps.is-in::after { transform: scaleY(1); }
.step { display: grid; grid-template-columns: 56px 1fr; gap: 20px; padding: 0 0 36px; position: relative; z-index: 1; }
.step:last-child { padding-bottom: 0; }
.step__n { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--t20); background: var(--bg); font-size: 15px; color: var(--accent-t); position: relative; z-index: 1; }
.step h3 { font-size: 20px; text-transform: uppercase; letter-spacing: -0.02em; font-weight: 700; margin: 12px 0 6px; }
.step p { color: var(--t70); font-size: 16px; font-weight: 400; max-width: 46ch; }

/* ===== 7. ДОВІРА ===== */
.dovira { background: var(--bg-2); padding-bottom: 0; }
.dovira__top { display: grid; gap: 32px; margin-bottom: 56px; }
@media (min-width: 1024px) { .dovira__top { grid-template-columns: 7fr 5fr; align-items: end; gap: 64px; } }
.big { font-size: clamp(3.5rem, 12vw, 9rem); font-weight: 800; letter-spacing: -0.07em; line-height: .9; color: var(--accent-t); margin-bottom: 16px; white-space: nowrap; }
.dovira__h { max-width: 16ch; }
.dovira__grid { display: grid; gap: 16px; }
@media (min-width: 900px) { .dovira__grid { grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; } .tile--zavod { grid-column: 1; grid-row: 1; } .tile--baraban { grid-column: 2; grid-row: 1 / span 2; } .tile--us { grid-column: 1; grid-row: 2; } }
.tile { position: relative; background: var(--bg); border: 1px solid var(--t10); overflow: hidden; }
.tile img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.tile:hover img { transform: scale(1.03); }
.tile--zavod { aspect-ratio: 16 / 9; }
.tile--baraban { aspect-ratio: 3 / 4; }
@media (min-width: 900px) { .tile--baraban { aspect-ratio: auto; } }
.tile figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 48px 20px 18px; background: linear-gradient(transparent, rgba(7,12,20,.92)); font-size: 16px; color: var(--t90); font-weight: 400; }
.tile figcaption b { display: block; font-size: 16px; text-transform: uppercase; letter-spacing: .06em; font-weight: 700; margin-bottom: 4px; }
.tile--us { padding: 28px 24px; display: grid; gap: 16px; align-content: start; }
.tile--us p { font-size: 16px; color: var(--t70); font-weight: 400; max-width: 56ch; }
.tile__logo { width: 200px !important; height: auto !important; object-fit: contain !important; }
.tile__sub { color: var(--t40) !important; font-size: 12px !important; text-transform: uppercase; letter-spacing: .14em; margin-top: 8px; }
.objs { list-style: none; display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px 16px; }
@media (min-width: 480px) { .objs { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 640px) { .objs { grid-template-columns: repeat(3, 1fr); } }
.objs li { border-left: 2px solid var(--accent); padding-left: 12px; font-size: 16px; color: var(--t70); display: grid; overflow-wrap: anywhere; }
.objs b { color: var(--text); font-size: 16px; font-weight: 700; }
.objs__rk { grid-column: 1 / -1; border-left-width: 4px !important; }
.objs__rk b { color: var(--accent-t); }
.marquee { margin-top: 72px; border-top: 1px solid var(--t10); border-bottom: 1px solid var(--t10); overflow: hidden; padding: 22px 0; }
.marquee__track { display: flex; gap: 56px; width: max-content; animation: marquee 32s linear infinite; }
.marquee__track span { font-size: clamp(1.1rem, 2.4vw, 1.6rem); font-weight: 700; letter-spacing: -0.02em; text-transform: uppercase; color: var(--t40); white-space: nowrap; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ===== 8. ПРОЄКТ І ТЕНДЕР ===== */
.proekt .h2 { margin-bottom: 48px; }
.proekt__grid { display: grid; gap: 16px; }
@media (min-width: 900px) { .proekt__grid { grid-template-columns: 1fr 1fr; } }
.pcard { border: 1px solid var(--t10); background: var(--bg-2); padding: 32px 24px; display: flex; flex-direction: column; gap: 16px; align-items: flex-start; }
@media (min-width: 768px) { .pcard { padding: 40px; } }
.pcard h3 { font-size: 22px; text-transform: uppercase; letter-spacing: -0.02em; font-weight: 800; }
.pcard > p { color: var(--t70); font-size: 16px; font-weight: 400; max-width: 52ch; }
.pcard .btn { margin-top: auto; }
.dstu { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.dstu li { border: 1px solid var(--accent); padding: 6px 12px; font-size: 14px; }
.dstu b { font-weight: 500; }
.dstu__note { color: var(--t60); font-size: 16px; font-weight: 400; }
.docs { display: grid; gap: 8px; width: 100%; }
.doc { display: flex; align-items: center; gap: 12px; min-height: 52px; padding: 10px 14px; border: 1px solid var(--t20); font-size: 15px; transition: border-color .2s; }
.doc .ic { color: var(--accent-t); }
.doc i { font-style: normal; color: var(--t40); margin-left: 6px; font-size: 13px; }
.doc:hover { border-color: var(--accent-t); }
.mini { width: 100%; display: grid; gap: 8px; margin-top: auto; }
.mini label { font-size: 14px; color: var(--t90); }
.mini__row { display: grid; gap: 8px; }
@media (min-width: 640px) { .mini__row { grid-template-columns: 1fr auto; } }
.mini input { height: 56px; padding: 0 16px; background: var(--bg); border: 1px solid var(--t20); font-size: 17px; border-radius: 0; min-width: 0; }
.mini input:focus { outline: none; border-color: var(--accent-t); }
.mini .btn { min-height: 56px; }
@media (max-width: 639px) { .mini .btn { white-space: normal; text-align: center; line-height: 1.3; letter-spacing: .08em; } }
.mini.is-sent { color: var(--accent-t); }

/* ===== 9. FAQ ===== */
.faq__grid { display: grid; gap: 40px; }
@media (min-width: 1024px) { .faq__grid { grid-template-columns: 4fr 8fr; gap: 80px; } }
.faq__img { display: none; width: 160px; margin-top: 40px; }
@media (min-width: 1024px) { .faq__img { display: block; } }
.faq__list { border-top: 1px solid var(--t10); }
.faq details { border-bottom: 1px solid var(--t10); }
.faq summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; padding: 16px 0; font-size: 17px; font-weight: 500; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .ic { color: var(--accent-t); transition: transform .3s var(--ease); }
.faq details[open] summary .ic { transform: rotate(45deg); }
.faq details p { color: var(--t70); font-size: 16px; font-weight: 400; padding: 0 40px 22px 0; max-width: 64ch; }

/* ===== 10. КОНТАКТИ ===== */
.kontakty { overflow: hidden; }
.kontakty__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .35; }
.kontakty__shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(244,246,248,.97) 0%, rgba(244,246,248,.9) 50%, rgba(244,246,248,.72) 100%); }
.kontakty__grid { position: relative; display: grid; gap: 48px; }
.kontakty__grid > *, .form, .field, .pcard, .mini { min-width: 0; }
@media (min-width: 1024px) { .kontakty__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 80px; align-items: start; } }
.kontakty .h2 { margin-bottom: 32px; }
.contacts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-bottom: 24px; max-width: 560px; }
.ct { display: flex; align-items: center; gap: 10px; min-height: 52px; padding: 10px 14px; border: 1px solid var(--t20); font-size: 15px; background: var(--bg-2); transition: border-color .2s, background-color .2s; overflow: hidden; }
.ct span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ct .ic { color: var(--accent-t); }
.ct:hover { border-color: var(--accent-t); }
.contacts .ct:nth-child(-n+2), .contacts .ct:last-child { grid-column: 1 / -1; }
@media (min-width: 640px) { .contacts .ct:nth-child(-n+2), .contacts .ct:last-child { grid-column: auto; } }
.addr { display: inline-flex; gap: 10px; align-items: center; color: var(--t60); font-size: 16px; min-height: 44px; }
.addr span { text-decoration: underline; text-underline-offset: 4px; text-decoration-color: var(--t20); }
.addr:hover { color: var(--text); }
.form--card { background: var(--bg-2); border: 1px solid var(--t10); padding: 28px 20px; -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
@media (min-width: 768px) { .form--card { padding: 40px; } }

/* ===== ПІДВАЛ ===== */
.foot { border-top: 1px solid var(--t10); padding: 40px 0 120px; }
@media (min-width: 1180px) { .foot { padding-bottom: 40px; } }
.foot__row { display: grid; gap: 16px; align-items: center; }
.foot__row img { height: 32px; width: auto; }
.foot__row p { color: var(--t60); font-size: 16px; font-weight: 400; }
.rekv { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px 32px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--t10); }
@media (min-width: 640px) { .rekv { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .rekv { grid-template-columns: 1.2fr 2fr 1fr 1fr 1.2fr 1.2fr; } }
.rekv dt { color: var(--t40); font-size: 12px; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 4px; }
.rekv dd { color: var(--t90); font-size: 16px; font-weight: 400; overflow-wrap: anywhere; }
.rekv a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: underline; text-underline-offset: 4px; text-decoration-color: var(--t20); }
.rekv a:hover { color: var(--accent-t); }
@media (min-width: 1024px) { .foot__row { grid-template-columns: auto 1fr auto; gap: 40px; } }

/* ===== ЛИПКА ПАНЕЛЬ ===== */
.sticky { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.25fr); gap: 1px; background: var(--t10);
  padding-bottom: env(safe-area-inset-bottom); transform: translateY(110%); transition: transform .4s var(--ease); }
.sticky.is-on { transform: none; }
.sticky__b { display: flex; align-items: center; justify-content: center; gap: 6px; min-height: 60px; padding: 0 6px; background: var(--bg-2); font-size: 12px; text-transform: uppercase; letter-spacing: .02em; text-align: center; line-height: 1.2; min-width: 0; }
.sticky__b .ic { color: var(--accent-t); }
.sticky__b--accent { background: var(--accent); color: var(--accent-ink); font-weight: 700; }
@media (min-width: 1180px) { .sticky { display: none; } }

/* ===== МОДАЛКА ===== */
.modal { position: fixed; inset: 0; z-index: 60; display: grid; place-items: center; padding: 16px; }
.modal[hidden] { display: none; }
.modal__bg { position: absolute; inset: 0; background: rgba(0,0,0,.7); }
.modal__box { position: relative; width: 100%; max-width: 520px; background: var(--bg-2); border: 1px solid var(--t20); border-top: 4px solid var(--accent); padding: 36px 24px 24px; animation: fadeSlideUp .5s var(--ease); }
.modal__box h3 { font-size: 22px; text-transform: uppercase; letter-spacing: -0.02em; margin-bottom: 12px; }
.modal__box p { color: var(--t70); font-size: 16px; margin-bottom: 20px; }
.modal__x { position: absolute; top: 6px; right: 6px; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; color: var(--t60); }
.modal__ms { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }

/* ===== МЕНШЕ РУХУ ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  [data-reveal], .co { opacity: 1 !important; transform: none !important; }
  .anim-video, .anim-label, .anim-title, .anim-meta, .anim-desc, .anim-stat-1, .anim-stat-2, .anim-stat-3, .anim-ctas { opacity: 1 !important; }
  .marquee__track { animation: none; }
  .izol__row i { transform: none !important; }
}

/* порівняння ізоляцій (приём з каталогів конкурентів, з даними RK) */
.izol { margin-top: 36px; display: grid; gap: 14px; max-width: 520px; }
.izol__t { font-size: 16px; color: var(--t90); }
.izol__t i { font-style: normal; color: var(--t40); margin-left: 6px; }
.izol__row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 12px; align-items: baseline; }
.izol__row span { font-size: 15px; color: var(--t70); }
.izol__row b { font-size: 15px; font-weight: 500; }
.izol__row i { grid-column: 1 / -1; display: block; height: 8px; width: var(--w); background: var(--t20); transform: scaleX(0); transform-origin: left; transition: transform 1.2s var(--ease); }
.izol__row--rk span, .izol__row--rk b { color: var(--accent-t); font-weight: 700; }
.izol__row--rk i { background: var(--accent); }
.izol.is-in .izol__row i { transform: scaleX(1); }
.izol.is-in .izol__row:nth-of-type(2) i { transition-delay: .15s; }
.izol.is-in .izol__row:nth-of-type(3) i { transition-delay: .3s; }
.izol__src { font-size: 13px; color: var(--t40); }

/* калькулятор діаметра */
.calc { display: grid; gap: 0; border: 1px solid var(--t10); background: var(--bg-2); margin-bottom: 16px; }
@media (min-width: 1024px) { .calc { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.calc__in, .calc__out { padding: 28px 20px; min-width: 0; }
@media (min-width: 768px) { .calc__in, .calc__out { padding: 40px; } }
.calc__out { border-top: 1px solid var(--t10); background: var(--bg); display: grid; gap: 18px; align-content: start; }
@media (min-width: 1024px) { .calc__out { border-top: 0; border-left: 1px solid var(--t10); } }
.calc__h { font-size: 22px; text-transform: uppercase; letter-spacing: -0.02em; font-weight: 800; margin-bottom: 10px; }
.calc__lead { color: var(--t70); font-size: 16px; font-weight: 400; margin-bottom: 24px; max-width: 48ch; }
.calc__fields { display: grid; gap: 20px; }
.calc__pair { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.calc__pair > div { display: grid; gap: 8px; min-width: 0; }
.calc__pair label { font-size: 14px; color: var(--t90); }
.calc__pair input { height: 56px; padding: 0 16px; background: var(--bg); border: 1px solid var(--t20); color: var(--text); font-size: 17px; border-radius: 0; width: 100%; min-width: 0; }
.calc__pair input:focus { outline: none; border-color: var(--accent-t); }
.calc .field input[type="text"] { background: var(--bg); }
.seg--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.seg--3 span { font-size: 13px; text-align: center; padding: 0 4px; line-height: 1.2; }
.calc__flow { color: var(--t70); font-size: 16px; }
.calc__flow b { color: var(--text); font-weight: 700; }
.calc__best { display: grid; gap: 4px; padding: 20px; border: 1px solid var(--accent); background: rgba(163,207,62,.06); }
.calc__k { color: var(--accent-t); font-size: 12px; letter-spacing: .24em; text-transform: uppercase; }
.calc__d { font-size: clamp(3rem, 9vw, 4.5rem); font-weight: 800; letter-spacing: -0.06em; line-height: 1; }
.calc__m { color: var(--t70); font-size: 16px; }
.calc__tbl { display: grid; }
.calc__row { display: grid; grid-template-columns: repeat(auto-fit, minmax(0, 1fr)); gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--t10); font-size: 15px; color: var(--t70); }
.calc__row--h { color: var(--t40); font-size: 12px; text-transform: uppercase; letter-spacing: .12em; }
.calc__row.is-on { color: var(--text); font-weight: 700; }
.calc__row.is-on span:first-child { color: var(--accent-t); }
.calc__fn { color: var(--t40); font-size: 13px; margin-top: 8px; }
.calc__note { color: var(--t60); font-size: 16px; font-weight: 400; }
.calc__src { color: var(--t40); font-size: 16px; font-weight: 400; }

/* від заводу до траншеї: фото Федора */
.put { margin-top: 72px; }
.put__h { font-size: clamp(1.4rem, 3vw, 2rem); text-transform: uppercase; letter-spacing: -0.04em; font-weight: 800; margin-bottom: 28px; }
.put__list { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 12px; position: relative; }
@media (min-width: 900px) { .put__list { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; } }
.put__i { display: grid; gap: 6px; align-content: start; min-width: 0; }
.put__i figure { position: relative; aspect-ratio: 3 / 4; overflow: hidden; border: 1px solid var(--t10); margin-bottom: 10px; }
.put__i img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.put__i:hover img { transform: scale(1.04); }
.put__n { color: var(--accent-t); font-size: 13px; font-weight: 800; }
.put__i b { font-size: 18px; text-transform: uppercase; letter-spacing: -0.02em; }
.put__i p { color: var(--t70); font-size: 16px; font-weight: 400; }
@media (min-width: 900px) {
  .put__i:nth-child(2) { transition-delay: .12s; } .put__i:nth-child(3) { transition-delay: .24s; } .put__i:nth-child(4) { transition-delay: .36s; }
}

/* каталог для завантаження */
.katalog { margin-top: 24px; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 16px 20px; align-items: center; padding: 24px 20px; border: 1px solid var(--accent); background: rgba(163,207,62,.05); transition: background-color .25s var(--ease); }
@media (min-width: 900px) { .katalog { grid-template-columns: auto minmax(0, 1fr) auto; padding: 28px 36px; } }
.katalog:hover { background: rgba(163,207,62,.12); }
.katalog__t { display: grid; gap: 4px; }
.katalog__t b { font-size: 20px; text-transform: uppercase; letter-spacing: -0.02em; font-weight: 800; }
.katalog__t span { color: var(--t70); font-size: 16px; font-weight: 400; }
.katalog__btn { grid-column: 1 / -1; display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 52px; padding: 0 22px; background: var(--accent); color: var(--accent-ink); font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; }
.katalog__btn i { font-style: normal; font-weight: 400; opacity: .7; }
@media (min-width: 900px) { .katalog__btn { grid-column: auto; } }

/* з'єднання на ключ */
.kliuch { margin-top: 80px; display: grid; gap: 32px; align-items: start; }
@media (min-width: 1024px) { .kliuch { grid-template-columns: 7fr 5fr; gap: 56px; } }
.kliuch__big { aspect-ratio: 3 / 2; overflow: hidden; border: 1px solid var(--t10); }
.kliuch__big img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.4s var(--ease); }
.kliuch__big:hover img { transform: scale(1.03); }
.kliuch__txt { display: grid; gap: 18px; min-width: 0; }
.kliuch__h { font-size: clamp(1.4rem, 3vw, 2rem); text-transform: uppercase; letter-spacing: -0.04em; font-weight: 800; }
.kliuch__txt > p { color: var(--t70); font-size: 16px; font-weight: 400; max-width: 52ch; }
.kliuch__pts { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.kliuch__pts li { display: grid; gap: 4px; padding-top: 12px; border-top: 2px solid var(--accent); }
.kliuch__pts b { font-size: 18px; font-weight: 800; letter-spacing: -0.02em; }
.kliuch__pts span { color: var(--t60); font-size: 14px; line-height: 1.35; }
@media (max-width: 639px) {
  .kliuch__pts { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .kliuch__pts li { grid-template-columns: 9.5em minmax(0, 1fr); align-items: baseline; gap: 12px; padding: 12px 0; border-top: 1px solid var(--t10); }
  .kliuch__pts li:first-child { border-top: 2px solid var(--accent); }
  .kliuch__pts span { font-size: 15px; }
}
.kliuch__txt > p.kliuch__note { color: var(--t60); font-size: 16px; }
.kliuch__set { -webkit-mask-image: radial-gradient(ellipse at center, #000 62%, transparent 100%); mask-image: radial-gradient(ellipse at center, #000 62%, transparent 100%); }
.kliuch__set img { width: 100%; }

/* для кого: ролі */
.seg-sec { background: var(--bg-2); }
.seg-sec .h2 { margin-bottom: 40px; max-width: 24ch; }
.roles { display: grid; gap: 20px; }
@media (min-width: 1024px) { .roles { grid-template-columns: 4fr 8fr; gap: 0; border: 1px solid var(--t10); } }
.roles__tabs { display: grid; grid-template-columns: minmax(0, 1fr); gap: 6px; }
@media (min-width: 640px) and (max-width: 1023px) { .roles__tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; } .roles__tabs .role-tab:last-child { grid-column: 1 / -1; } }
@media (min-width: 1024px) { .roles__tabs { grid-template-columns: minmax(0, 1fr); gap: 0; border-right: 1px solid var(--t10); } .roles__tabs .role-tab:last-child { grid-column: auto; } }
.role-tab { position: relative; display: flex; align-items: center; gap: 12px; min-height: 56px; padding: 12px 14px; text-align: left; border: 1px solid var(--t20); font-size: 15px; line-height: 1.25; color: var(--t70); transition: color .2s, border-color .2s, background-color .2s; }
@media (min-width: 1024px) { .role-tab { border: 0; border-bottom: 1px solid var(--t10); min-height: 76px; padding: 18px 28px; font-size: 16px; } .role-tab:last-child { border-bottom: 0; } }
.role-tab__n { color: var(--t40); font-size: 12px; font-weight: 800; }
.role-tab:hover { color: var(--text); }
.role-tab.is-on { color: var(--text); border-color: var(--accent-t); background: rgba(163,207,62,.08); font-weight: 700; }
.role-tab.is-on .role-tab__n { color: var(--accent-t); }
@media (min-width: 1024px) {
  .role-tab::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent); transform: scaleY(0); transform-origin: top; transition: transform .4s var(--ease); }
  .role-tab.is-on { border-color: var(--t10); }
  .role-tab.is-on::after { transform: scaleY(1); }
}
.role-panel { padding: 24px 20px 28px; border: 1px solid var(--t10); background: var(--bg); }
@media (min-width: 1024px) { .role-panel { border: 0; padding: 40px 48px; } }
.role-panel.is-on { animation: fadeSlideUp .5s var(--ease); }
.role-panel__who { color: var(--t60); font-size: 16px; margin-bottom: 22px; }
.role-panel__cols { display: grid; gap: 24px; margin-bottom: 28px; }
@media (min-width: 768px) { .role-panel__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; } }
.role-panel__k { font-size: 12px; text-transform: uppercase; letter-spacing: .16em; color: var(--t40); margin-bottom: 12px; }
.pains, .gains { list-style: none; display: grid; gap: 12px; }
.pains li, .gains li { position: relative; padding-left: 28px; font-size: 16px; line-height: 1.45; font-weight: 400; }
.pains li { color: var(--t60); }
.pains li span { background: linear-gradient(rgba(255,107,61,.8), rgba(255,107,61,.8)) no-repeat 0 58% / 0 1px; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.roles.is-in .role-panel.is-on .pains li span { animation: strike .7s var(--ease) .35s forwards; }
.roles.is-in .role-panel.is-on .pains li:nth-child(2) span { animation-delay: .5s; }
.roles.is-in .role-panel.is-on .pains li:nth-child(3) span { animation-delay: .65s; }
@keyframes strike { to { background-size: 100% 1px; color: var(--t40); } }
.pains li::before { content: "×"; position: absolute; left: 4px; top: -1px; color: #d9541e; font-weight: 700; }
.gains li { color: var(--t90); }
.gains li::before { content: ""; position: absolute; left: 2px; top: .35em; width: 14px; height: 8px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
.role-cta { width: 100%; }
@media (min-width: 640px) { .role-cta { width: auto; } }
@media (max-width: 639px) { .role-cta { white-space: normal; text-align: center; line-height: 1.3; letter-spacing: .1em; } }
@media (prefers-reduced-motion: reduce) { .pains li span { background-size: 100% 1px; } }

/* калькулятор: параметри поза стандартним підбором */
.calc.is-special .calc__best { border-color: #e0782f; background: #fff4ec; }
.calc.is-special .calc__k { color: #b4501a; }
.calc.is-special .calc__d { font-size: clamp(1.5rem, 3vw, 2.1rem); line-height: 1.15; letter-spacing: -0.03em; text-transform: uppercase; }
.calc.is-special .calc__note { color: var(--t90); font-weight: 400; }

/* комплект поставки */
.kompl__t { margin-top: 32px; font-size: 13px; text-transform: uppercase; letter-spacing: .14em; color: var(--t60); }
.kompl { list-style: none; display: grid; gap: 10px; margin-top: 14px; }
.kompl li { position: relative; padding-left: 22px; font-size: 16px; color: var(--t90); font-weight: 400; }
.kompl li::before { content: ""; position: absolute; left: 0; top: .7em; width: 10px; height: 2px; background: var(--accent); }


/* ===================== СВІТЛА ТЕМА (Федор, 09.11.2026) =====================
   Сторінка світла, темні зони мають власні токени: перший екран (відео), шапка над відео,
   підвал, вітрини рендерів RK, підписи на фото. */
:root {
  --bg: #f3f5f8;
  --bg-2: #ffffff;
  --bg-3: #e8ecf1;
  --text: #0b1626;
  --t90: rgba(11, 22, 38, .94);
  --t70: rgba(11, 22, 38, .84);
  --t60: rgba(11, 22, 38, .74);
  --t40: rgba(11, 22, 38, .62);
  --t20: rgba(11, 22, 38, .18);
  --t10: rgba(11, 22, 38, .09);
  --accent: #a3cf3e;
  --accent-t: #4d7a10;
  --accent-ink: #0a1405;
}
.dark, .hero, .foot, .shot-dark, .nav {
  --bg: #070c14; --bg-2: #0b1320;
  --text: #f2f4f7;
  --t90: rgba(242, 244, 247, .94); --t70: rgba(242, 244, 247, .84); --t60: rgba(242, 244, 247, .74);
  --t40: rgba(242, 244, 247, .6); --t20: rgba(242, 244, 247, .2); --t10: rgba(242, 244, 247, .1);
  --accent-t: #a3cf3e;
  color: var(--text);
}
/* шапка: над відео світлий текст, після прокрутки і в меню темний на білому */
.nav--solid, .nav--open {
  --text: #0b1626; --t70: rgba(11, 22, 38, .84); --t20: rgba(11, 22, 38, .18); --t10: rgba(11, 22, 38, .09);
  --accent-t: #4d7a10;
  box-shadow: 0 1px 0 rgba(11, 22, 38, .08);
}
.nav--open { background: #ffffff; }
.nav__logo .logo-d { display: none; }
.nav--solid .nav__logo .logo-l, .nav--open .nav__logo .logo-l { display: none; }
.nav--solid .nav__logo .logo-d, .nav--open .nav__logo .logo-d { display: block; }
.nav__call { color: var(--text); }
.mmenu__bg { background: #ffffff; }
.mmenu { color: #0b1626; }
/* підвал темно-синій */
.foot { background: #0b1626; border-top: 0; }
/* підписи на фото лишаються світлими */
.tile figcaption { color: #f2f4f7; }
.tile figcaption b { color: #ffffff; }
/* вітрини рендерів RK (згенеровані на темному тлі) */
.shot-dark { background: #070c14; border: 1px solid rgba(11, 22, 38, .12); }
.rozriz.shot-dark { padding: 8px 0; }
.kliuch__set.shot-dark { padding: 12px 0; }
.montazh__shot { margin-bottom: 20px; max-width: 560px; }
.montazh__shot img { margin-bottom: 0 !important; }
/* картки й блоки на світлому: легка тінь замість темних рамок */
.line, .pcard, .calc, .quiz, .form--card, .role-panel, .katalog, .tile--us { box-shadow: 0 1px 2px rgba(11, 22, 38, .04), 0 8px 24px -12px rgba(11, 22, 38, .12); }
.btn--accent:hover { background: #93bf2e; }
.katalog { background: #f6fbe9; }
.katalog:hover { background: #eef7d8; }
.calc__best { background: #f6fbe9; }
.role-tab.is-on, .opt.is-on, .seg input:checked + span { background: #f1f8e1; }
.objs li { border-left-color: var(--accent); }
.race__row--steel .race__track i { background: #9aa3b0; }
.marquee__track span { color: rgba(11, 22, 38, .32); }
.big { color: var(--accent-t); }
.sticky { background: rgba(11, 22, 38, .1); box-shadow: 0 -6px 20px rgba(11, 22, 38, .08); }
.modal__bg { background: rgba(11, 22, 38, .55); }

/* схема «сталь проти гнучкої» (вид траси збоку) */
.race__pic { margin: 8px 0 6px; }
.race__svg { width: 100%; height: auto; display: block; overflow: visible; }
.race__svg--m { display: none; }
@media (max-width: 639px) { .race__svg--d { display: none; } .race__svg--m { display: block; } }
.race__lbl { fill: var(--t70); font-family: var(--font); letter-spacing: .02em; }
.race__j { opacity: 0; transform-box: fill-box; transform-origin: center; transform: scale(.3); transition: opacity .3s ease, transform .45s var(--ease); transition-delay: calc(var(--i) * 110ms); }
.race.is-run .race__j { opacity: 1; transform: none; }
.race__draw { clip-path: inset(0 100% 0 0); transition: clip-path 2.6s var(--ease) .4s; }
.race.is-run .race__draw { clip-path: inset(0 0 0 0); }
.race__coil { transform-box: fill-box; transform-origin: center; }
.race.is-run .race__coil { animation: coilSpin 2.6s var(--ease) .4s; }
@keyframes coilSpin { from { transform: rotate(-160deg); } to { transform: rotate(0); } }
.race__row--steel .race__count b { color: #d9541e; }
@media (prefers-reduced-motion: reduce) { .race__j { opacity: 1; transform: none; } .race__draw { clip-path: none; } }

/* відео RK з об'єкта (YouTube, вантажиться тільки після натискання) */
.vid { margin-top: 72px; display: grid; gap: 28px; align-items: center; }
@media (min-width: 900px) { .vid { grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: 56px; } }
.vid__frame { position: relative; aspect-ratio: 9 / 16; max-width: 360px; width: 100%; margin: 0 auto; background: #0b1626; overflow: hidden; box-shadow: 0 18px 40px -18px rgba(11,22,38,.35); }
.vid__play { position: absolute; inset: 0; width: 100%; height: 100%; padding: 0; cursor: pointer; }
.vid__play img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.vid__play:hover img { transform: scale(1.03); }
.vid__btn { position: absolute; left: 50%; top: 50%; width: 76px; height: 76px; margin: -38px 0 0 -38px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--accent); color: var(--accent-ink); box-shadow: 0 0 0 10px rgba(163,207,62,.28); transition: transform .25s var(--ease); }
.vid__btn svg { margin-left: 4px; }
.vid__play:hover .vid__btn { transform: scale(1.08); }
.vid__frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.vid__h { font-size: clamp(1.4rem, 3vw, 2rem); text-transform: uppercase; letter-spacing: -0.04em; font-weight: 800; margin-bottom: 14px; }
.vid__txt > p { color: var(--t70); font-size: 16px; font-weight: 400; max-width: 52ch; }
.vid__pts { list-style: none; display: grid; gap: 0; margin: 22px 0 16px; max-width: 560px; }
.vid__pts li { display: grid; gap: 2px; padding: 14px 0; border-top: 1px solid var(--t10); }
.vid__pts li:first-child { border-top: 2px solid var(--accent); }
.vid__pts b { font-size: 17px; font-weight: 700; }
.vid__pts span { color: var(--t60); font-size: 15px; }
.vid__txt > p.vid__src { font-size: 13px; color: var(--t40); }
/* відео монтажу пресового фітинга в блоці «Монтаж» */
.vid16.vid__frame { aspect-ratio: 16 / 9; max-width: 560px; margin: 0 0 12px; background: #eceff5; box-shadow: none; border: 1px solid var(--t10); }
.vid16 .vid__play img { object-fit: contain; -webkit-mask-image: none; mask-image: none; margin: 0; }
.vid16 .vid__btn { width: 64px; height: 64px; margin: -32px 0 0 -32px; }
.vid16__cap { display: flex; align-items: center; gap: 8px; color: var(--t60); font-size: 16px; margin-bottom: 20px; }
.vid16__cap .ic { color: var(--accent-t); width: 18px; height: 18px; }

/* ===== ЗАВОД: відео RK Infra під першим екраном ===== */
.hero__ctas .hero__vid { display: inline-flex; gap: 12px; font-weight: 400; }
.hero__vid-i { width: 28px; height: 28px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; background: var(--accent); color: var(--accent-ink); flex: none; }
.hero__vid-i svg { margin-left: 2px; }
.zavod { padding-bottom: calc(var(--sec) * .75); }
.zavod__head { display: grid; gap: 16px; margin-bottom: 32px; }
.zavod__head .h2 { margin: 0; }
.zavod__sub { color: var(--t70); font-size: 17px; font-weight: 400; max-width: 52ch; }
@media (min-width: 900px) { .zavod__head { grid-template-columns: minmax(0, 1fr) minmax(0, 440px); align-items: end; gap: 56px; margin-bottom: 40px; } }
.zavod__frame.vid__frame { max-width: none; aspect-ratio: 4 / 3; margin: 0; background: #0b1626; box-shadow: 0 30px 60px -30px rgba(11,22,38,.45); }
@media (min-width: 640px) { .zavod__frame.vid__frame { aspect-ratio: 16 / 9; } }
@media (min-width: 1024px) { .zavod__frame.vid__frame { aspect-ratio: 1276 / 557; } }
.zavod__frame.vid__frame.is-playing { aspect-ratio: 16 / 9; max-height: 82vh; }
.zavod__frame .vid__play::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(7,12,20,.55), rgba(7,12,20,0) 45%); pointer-events: none; }
.zavod__frame .vid__btn { width: 72px; height: 72px; margin: -36px 0 0 -36px; z-index: 1; box-shadow: 0 0 0 14px rgba(163,207,62,.3); animation: zavodPulse 2.4s var(--ease) infinite; }
@keyframes zavodPulse { 0%, 100% { box-shadow: 0 0 0 10px rgba(163,207,62,.32); } 50% { box-shadow: 0 0 0 22px rgba(163,207,62,.08); } }
.zavod__chip { position: absolute; left: 20px; bottom: 18px; z-index: 1; color: #fff; font-size: 16px; letter-spacing: .04em; }
@media (min-width: 640px) { .zavod__frame .vid__btn { width: 96px; height: 96px; margin: -48px 0 0 -48px; } .zavod__chip { left: 32px; bottom: 28px; font-size: 18px; } }
.zavod__facts { list-style: none; display: grid; gap: 0; margin-top: 28px; }
.zavod__facts li { display: grid; gap: 4px; padding: 16px 0; border-top: 1px solid var(--t10); }
.zavod__facts li:first-child { border-top: 2px solid var(--accent); }
.zavod__facts b { font-size: 20px; font-weight: 800; text-transform: uppercase; letter-spacing: -0.02em; }
.zavod__facts span { color: var(--t60); font-size: 16px; }
@media (min-width: 768px) { .zavod__facts { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; } .zavod__facts li { border-top: 2px solid var(--t10); } .zavod__facts li:first-child { border-top-color: var(--accent); } }
@media (prefers-reduced-motion: reduce) { .zavod__frame .vid__btn { animation: none; } }

/* ===== ВЕЛИКІ ДІАМЕТРИ: темна смуга з відео FibreFlex ===== */
.bigdn { background: var(--bg); color: var(--text); padding-bottom: var(--sec); }
.bigdn .zavod__frame.vid__frame { aspect-ratio: 16 / 9; box-shadow: 0 30px 70px -30px rgba(0,0,0,.7); }
.bigdn .zavod__facts li { border-top-color: var(--t10); }
.bigdn .zavod__facts li:first-child { border-top-color: var(--accent); }
.line__vid { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; margin-bottom: 12px; color: var(--text); font-size: 16px; text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 4px; }
.line__vid .hero__vid-i { width: 26px; height: 26px; }
.line__vid:hover { text-decoration-thickness: 2px; }
@media (max-width: 639px) { .zavod__chip { right: 16px; left: 16px; bottom: 12px; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; } .zavod__frame .vid__btn { margin-top: -48px; } }

/* ===== ПОДАРУНОК: зразок труби ===== */
.zrazok { background: var(--bg-2); overflow: hidden; }
.zrazok__grid { display: grid; gap: 40px; align-items: center; }
@media (min-width: 1024px) { .zrazok__grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 64px; } }
.zrazok__pic { position: relative; margin: 0; }
.zrazok__pic img { width: 100%; height: auto; display: block; border-radius: 0; }
.zrazok__tag { position: absolute; left: 0; top: 0; background: var(--accent); color: var(--accent-ink); font-size: 13px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; padding: 10px 16px; }
.zrazok__txt .h2 { margin-bottom: 20px; max-width: 18ch; }
.zrazok__lead { color: var(--t70); font-size: 17px; font-weight: 400; max-width: 54ch; margin-bottom: 20px; }
.zrazok__pts { list-style: none; display: grid; gap: 10px; margin-bottom: 28px; }
.zrazok__pts li { display: flex; gap: 10px; align-items: flex-start; font-size: 16px; }
.zrazok__pts .ic { color: var(--accent-t); flex: none; width: 20px; height: 20px; margin-top: 2px; }
.zrazok__form { max-width: none; gap: 18px; }
.zrazok__row { display: grid; gap: 18px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .zrazok__row { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.zrazok__form .field { display: grid; gap: 8px; align-content: start; }

/* ===== НАБІР ПРОЄКТУВАЛЬНИКА В TELEGRAM ===== */
.nabir { display: grid; gap: 40px; align-items: center; margin: 72px 0; padding: 32px 24px; background: var(--bg-2); border: 1px solid var(--t10); border-top: 4px solid var(--accent); }
@media (min-width: 900px) { .nabir { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 56px; padding: 48px 56px; } }
.nabir .eyebrow { margin-bottom: 14px; }
.nabir__h { font-size: clamp(1.5rem, 3vw, 2.25rem); text-transform: uppercase; letter-spacing: -0.04em; font-weight: 800; line-height: 1.05; margin-bottom: 14px; }
.nabir__lead { color: var(--t70); font-size: 17px; font-weight: 400; max-width: 52ch; margin-bottom: 20px; }
.nabir__list { list-style: none; counter-reset: nb; display: grid; gap: 0; margin-bottom: 28px; }
.nabir__list li { counter-increment: nb; display: grid; grid-template-columns: 36px minmax(0, 1fr); column-gap: 8px; padding: 12px 0; border-top: 1px solid var(--t10); }
.nabir__list li::before { content: "0" counter(nb); grid-row: span 2; color: var(--accent-t); font-weight: 700; font-size: 15px; padding-top: 2px; }
.nabir__list b { font-size: 17px; }
.nabir__list span { color: var(--t60); font-size: 16px; }
.nabir__go { gap: 12px; }
@media (max-width: 639px) { .nabir__go { width: 100%; justify-content: center; } }
.nabir__alt { color: var(--t60); font-size: 16px; margin-top: 12px; }
.nabir__phone { display: flex; justify-content: center; }
.tgm { width: 100%; max-width: 330px; background: #0e1621; border-radius: 28px; padding: 10px; box-shadow: 0 30px 60px -30px rgba(11,22,38,.55); }
.tgm__top { display: flex; align-items: center; gap: 10px; padding: 10px 12px 12px; color: #fff; }
.tgm__top b { display: block; font-size: 15px; }
.tgm__top i { font-style: normal; font-size: 13px; color: #8aa0b4; }
.tgm__ava { width: 38px; height: 38px; border-radius: 50%; background: var(--accent); color: #0b1626; display: grid; place-items: center; font-weight: 800; font-size: 14px; }
.tgm__chat { background: #17212b; border-radius: 20px; padding: 14px 12px; display: grid; gap: 8px; }
.tgm__chat p { margin: 0; font-size: 14px; line-height: 1.35; border-radius: 14px; padding: 9px 12px; max-width: 88%; color: #e9eef3; }
.tgm__me { justify-self: end; background: #2b5278; }
.tgm__bot, .tgm__doc { background: #182533; border: 1px solid #22303f; }
.tgm__doc { display: flex; gap: 10px; align-items: center; }
.tgm__doc b { display: block; font-weight: 600; font-size: 13px; }
.tgm__doc i { font-style: normal; color: #8aa0b4; font-size: 12px; }
.tgm__ic { flex: none; width: 34px; height: 34px; border-radius: 50%; background: var(--accent); color: #0b1626; display: grid; place-items: center; font-size: 10px; font-weight: 800; }
.tgm__btn { justify-self: stretch; max-width: none !important; text-align: center; background: #2b5278 !important; color: #fff; font-weight: 600; }
.tgm .tgm__doc { opacity: 0; transform: translateY(8px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.nabir.is-in .tgm__doc { opacity: 1; transform: none; }
.nabir.is-in .tgm__doc:nth-of-type(3) { transition-delay: .25s; } .nabir.is-in .tgm__doc:nth-of-type(4) { transition-delay: .5s; } .nabir.is-in .tgm__doc:nth-of-type(5) { transition-delay: .75s; } .nabir.is-in .tgm__doc:nth-of-type(6) { transition-delay: 1s; }
@media (prefers-reduced-motion: reduce) { .tgm .tgm__doc { opacity: 1; transform: none; } }
.nabir { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .nabir { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); } }
.nabir__h { overflow-wrap: anywhere; }
.nabir.is-in .tgm__doc:nth-of-type(7) { transition-delay: 1.25s; }

/* ===== ВЕРХНЯ СМУГА: месенджери і YouTube ===== */
.topbar { background: #0b1626; color: #e9eef3; }
.topbar__row { display: flex; align-items: center; justify-content: space-between; gap: 4px; min-height: 44px; }
.topbar__t { display: none; font-size: 13px; color: #9fb0c2; letter-spacing: .04em; margin-right: 6px; }
.topbar__m { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-width: 44px; min-height: 44px; padding: 0 6px; color: #e9eef3; font-size: 14px; transition: color .2s; }
.topbar__m .ic { width: 20px; height: 20px; }
.topbar__m span { display: none; }
.topbar__m--vb .ic { color: #a78bfa; }
.topbar__m--tg .ic { color: #5ab0e8; }
.topbar__m--wa .ic { color: #4ad07a; }
.topbar__m--yt .ic { color: #ff5a5a; }
.topbar__m:hover { color: var(--accent); }
.topbar__tel { color: #fff; font-weight: 700; font-size: 15px; letter-spacing: .02em; display: inline-flex; align-items: center; min-height: 44px; padding: 0 4px; white-space: nowrap; }
.topbar__m--yt { margin-left: auto; }
@media (max-width: 380px) { .topbar__tel { font-size: 14px; } }
@media (min-width: 768px) {
  .topbar__row { justify-content: flex-start; gap: 8px; }
  .topbar__t { display: inline; }
  .topbar__m span { display: inline; }
  .topbar__m { padding: 0 10px; }
  .topbar__tel { margin-left: 8px; padding-left: 16px; border-left: 1px solid rgba(255,255,255,.18); }
}
html { scroll-padding-top: 108px; }
@media (min-width: 768px) { html { scroll-padding-top: 120px; } }
.hero__content { padding-top: 140px; }
@media (max-width: 419px) {
  .topbar__row { padding-left: 12px; padding-right: 12px; gap: 0; }
  .topbar__tel { font-size: 14px; letter-spacing: 0; padding: 0 6px; }
}
.mmenu__content { padding-top: 128px; }

/* ===== НАВІГАЦІЯ: читабельніші пункти ===== */
.nav__links { gap: 26px; }
.nav__links a { color: var(--text); font-size: 13px; font-weight: 500; letter-spacing: .08em; white-space: nowrap; padding: 12px 0; position: relative; }
.nav__links a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 6px; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav:not(.nav--solid):not(.nav--open) .nav__links a { color: #fff; text-shadow: 0 1px 8px rgba(0,0,0,.35); }
@media (min-width: 1180px) and (max-width: 1365px) { .nav__links { gap: 20px; } .nav__links a { font-size: 12px; letter-spacing: .06em; } .nav__btns .btn--ghost { display: none; } }
.mmenu__content { overflow-y: auto; }
.mmenu__links .mmenu__link { padding: 12px 0; }
.mmenu__links .mmenu__link span:first-child { font-size: 22px; font-weight: 400; }


/* ===== ЧИТАБЕЛЬНІСТЬ (Федор, 09.11): товщі шрифти, контрастніші підписи, головне виділено ===== */
body { font-weight: 400; }
.eyebrow, .hero__label { font-size: 13px; font-weight: 600; letter-spacing: .16em; color: var(--t60); }
.hero__meta, .stat__l { font-size: 13px; font-weight: 500; color: var(--t70); }
.lead, .hero__desc, .zavod__sub, .zrazok__lead, .nabir__lead, .calc__lead { color: var(--t90); }
/* порівняння «гнучка чи сталь» */
.cmp__row > span { font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--t70); }
.cmp__row p { font-size: 17px; color: var(--t60); }
.cmp__row p.cmp__flex { color: var(--text); font-weight: 700; position: relative; }
.cmp__row--head b { font-size: 15px; font-weight: 800; letter-spacing: .1em; color: var(--t70); }
.cmp__row--head b.cmp__flex { color: var(--accent-t); }
@media (min-width: 900px) { .cmp__row p.cmp__flex { padding-left: 16px; border-left: 3px solid var(--accent); } }
.stal__foot p { color: var(--t90); font-weight: 500; }
/* картки, кроки, списки */
.step h3, .put__i b, .line__name, .faq summary { font-weight: 800; }
.step p, .put__i p, .line__use, .kliuch__txt > p, .pcard > p, .tile--us p, .vid__txt > p, .faq details p { color: var(--t90); }
.pains li, .gains li, .kompl li { font-weight: 500; }
.line__specs dt { font-weight: 600; color: var(--t60); }
.line__specs dd { font-weight: 700; color: var(--text); }
.co span, .opt span, .calc__note, .calc__src, .dstu__note, .form__note, .field__help { color: var(--t70); }
.nabir__list span, .zavod__facts span, .vid__pts span { color: var(--t70); }
.field label, .field__label { font-weight: 600; }
.foot__row p, .rekv dd { color: var(--t90); }
.faq summary { font-weight: 700; }
.line__specs dt { font-size: 13px; }

/* ===== ПЕРЕМИКАЧ МОВИ ===== */
.nav__lang { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; height: 44px; padding: 0 10px; border: 1px solid var(--t20); color: var(--text); font-size: 13px; font-weight: 700; letter-spacing: .1em; margin-left: auto; transition: border-color .2s, background-color .2s; }
.nav__lang:hover { border-color: var(--accent); background: rgba(163,207,62,.12); }
.nav__lang + .nav__call { margin-left: 0; }
@media (min-width: 1180px) { .nav__lang { margin-left: 0; order: 3; } .nav__btns { order: 4; } }
@media (min-width: 640px) { .hero__ctas { display: flex; flex-wrap: wrap; gap: 12px; } }

/* ===== ТРУБИ ПІД ПЕРШИМ ЕКРАНОМ ===== */
.truby { background: var(--bg); padding: 72px 0 56px; overflow: hidden; }
@media (min-width: 768px) { .truby { padding: 104px 0 72px; } }
.truby__head { display: grid; gap: 12px; margin-bottom: 28px; }
.truby__head .h2 { margin: 0; max-width: 22ch; }
.truby__sub { color: var(--t70); font-size: 16px; font-weight: 500; letter-spacing: .02em; }
@media (min-width: 900px) { .truby__head { grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 48px; margin-bottom: 36px; } }
.truby__stage { position: relative; width: 100%; max-width: 1640px; margin: 0 auto 0 0; }
.truby__img { display: block; width: 100%; height: auto; filter: drop-shadow(0 22px 18px rgba(11,22,38,.18)); }
.truby__stage[data-reveal] { opacity: 0; transform: translateX(-6%); transition: opacity 1s var(--ease), transform 1.2s var(--ease); }
.truby__stage[data-reveal].is-in { opacity: 1; transform: none; }
.truby__tags { list-style: none; display: grid; gap: 0; margin-top: 18px; }
.truby__tags a { display: grid; grid-template-columns: 14px minmax(0, 1fr); column-gap: 12px; align-items: baseline; padding: 14px 0; border-top: 1px solid var(--t10); color: var(--text); text-decoration: none; min-height: 44px; }
.truby__tags i { grid-row: span 2; width: 14px; height: 14px; border-radius: 50%; background: var(--c); align-self: center; box-shadow: 0 0 0 4px color-mix(in srgb, var(--c) 22%, transparent); }
.truby__tags b { font-size: 18px; font-weight: 800; text-transform: uppercase; letter-spacing: -0.01em; }
.truby__tags span { color: var(--t70); font-size: 16px; }
.truby__tags a:hover b { color: var(--accent-t); }
/* на телефоні показуємо кінці труб крупніше: обрізаємо ліву частину */
@media (max-width: 767px) {
  .truby__stage { aspect-ratio: 2.3 / 1; }
  .truby__img { width: auto; height: 100%; max-width: none; position: absolute; right: -2%; top: 0; }
}
/* на комп'ютері підписи стоять під кінцем своєї труби */
@media (min-width: 900px) {
  .truby__tags { position: relative; height: 92px; margin-top: 10px; }
  .truby__tags li { position: absolute; left: var(--x); top: 0; transform: translateX(-50%); }
  .truby__tags a { border-top: 0; padding: 12px 0 0; grid-template-columns: 14px auto; }
  .truby__tags li::before { content: ""; position: absolute; left: 50%; top: -14px; width: 1px; height: 18px; background: var(--c); }
}
@media (prefers-reduced-motion: reduce) { .truby__stage[data-reveal] { opacity: 1; transform: none; } }
.truby__tags { padding: 0 var(--pad); }
@media (max-width: 767px) { .truby__stage { aspect-ratio: auto; } .truby__img { position: static; width: 100%; height: auto; } .truby__crop { } }
@media (min-width: 900px) { .truby__tags { padding: 0; } .truby__stage { padding-bottom: 0; } }
@media (max-width: 767px) { .truby__stage { overflow: hidden; } .truby__img { width: 160%; max-width: none; margin-left: -58%; } }
@media (max-width: 767px) { .truby__img { width: 112%; margin-left: -9%; } }
@media (min-width: 900px) { .truby__tags span { white-space: nowrap; } .truby__tags li:last-child { transform: translateX(-70%); } }
@media (min-width: 900px) { .truby__tags { height: 70px; } .truby { padding-bottom: 40px; } }

/* ===== РЕФЕРЕНС-ЛИСТ ===== */
.tile__gov { display: flex; gap: 10px; align-items: flex-start; font-size: 16px; color: var(--t90) !important; font-weight: 500 !important; }
.tile__gov .ic { color: var(--accent-t); flex: none; width: 22px; height: 22px; margin-top: 2px; }
.tile__more { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-weight: 700; color: var(--text); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 5px; }
.ref { margin-top: 72px; }
.ref__head { max-width: 760px; margin-bottom: 28px; }
.ref__head .eyebrow { margin-bottom: 12px; }
.ref__h { font-size: clamp(1.5rem, 3vw, 2.25rem); text-transform: uppercase; letter-spacing: -0.04em; font-weight: 800; line-height: 1.05; margin-bottom: 12px; }
.ref__lead { color: var(--t90); font-size: 17px; max-width: 60ch; }
.ref__stats { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; margin-bottom: 24px; border-top: 2px solid var(--accent); }
@media (min-width: 900px) { .ref__stats { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.ref__stats li { display: grid; gap: 4px; padding: 18px 16px 18px 0; }
.ref__stats b { font-size: clamp(1.6rem, 3.4vw, 2.6rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1; }
.ref__stats span { color: var(--t70); font-size: 16px; }
.ref__gov { display: flex; gap: 12px; align-items: flex-start; padding: 18px 20px; margin-bottom: 28px; background: var(--bg-2); border: 1px solid var(--t10); border-left: 4px solid var(--accent); font-size: 16px; font-weight: 500; line-height: 1.55; max-width: 980px; }
.ref__gov .ic { color: var(--accent-t); flex: none; width: 24px; height: 24px; margin-top: 1px; }
.ref__tbl { background: var(--bg-2); border: 1px solid var(--t10); }
.ref__list { list-style: none; }
.ref__row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 16px; padding: 16px 18px; border-top: 1px solid var(--t10); font-size: 16px; }
.ref__list .ref__row:first-child { border-top: 0; }
.ref__row--h { display: none; }
.ref__city { font-weight: 800; font-size: 17px; }
.ref__date { color: var(--t70); font-variant-numeric: tabular-nums; text-align: right; }
.ref__net, .ref__who { color: var(--t70); }
.ref__d { grid-column: 1 / -1; font-weight: 600; overflow-wrap: anywhere; }
.ref__who { grid-column: 1 / -1; font-size: 15px; }
@media (min-width: 1024px) {
  .ref__row { grid-template-columns: 1.15fr .7fr 1fr 2fr 1fr; gap: 16px; align-items: baseline; padding: 14px 20px; }
  .ref__row--h { display: grid; border-top: 0; border-bottom: 2px solid var(--text); font-size: 13px; font-weight: 700; color: var(--t70); text-transform: uppercase; letter-spacing: .1em; }
  .ref__date { text-align: left; }
  .ref__d, .ref__who { grid-column: auto; }
  .ref__who { font-size: 16px; }
}
.ref__note { color: var(--t70); font-size: 16px; margin-top: 14px; max-width: 80ch; }
.line__vid { grid-column: 1 / -1; justify-self: start; }
/* новий ролик першого екрану світліший: трохи більше затемнення під текстом */
.hero__shade::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(7,12,20,.55), rgba(7,12,20,.15) 55%, rgba(7,12,20,.25)); pointer-events: none; }
@media (min-width: 1024px) { .hero__shade::after { background: linear-gradient(to top, rgba(7,12,20,.6), rgba(7,12,20,.12) 60%, rgba(7,12,20,.3)), linear-gradient(to left, rgba(7,12,20,.35), rgba(7,12,20,0) 45%); } }

/* квіз на 4 питання: заповнення «труби» прогресу */
.quiz[data-step="1"] .quiz__fill { transform: scaleX(.25); }
.quiz[data-step="2"] .quiz__fill { transform: scaleX(.5); }
.quiz[data-step="3"] .quiz__fill { transform: scaleX(.75); }
.quiz[data-step="4"] .quiz__fill, .quiz[data-step="5"] .quiz__fill { transform: scaleX(1); }
/* DUO у картках лінійок */
.line__duo { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px; align-items: start; margin: -6px 0 18px; padding: 12px 14px; background: color-mix(in srgb, var(--c) 10%, var(--bg-2)); border-left: 3px solid var(--c); }
.line__duo b { font-size: 13px; font-weight: 800; letter-spacing: .12em; background: var(--text); color: var(--bg-2); padding: 3px 7px; line-height: 1.2; }
.line__duo span { font-size: 16px; line-height: 1.45; color: var(--t90); }
.sizes__cap { font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--t70); margin: 14px 0 6px; }
.sizes .sizes__cap:first-of-type { margin-top: 4px; }
/* пошта у верхній смузі */
.topbar__m--em .ic { color: #f2c230; }
@media (max-width: 419px) { .topbar__m--yt { display: none; } .topbar__tel { margin-left: auto; } }
@media (min-width: 768px) and (max-width: 1199px) { .topbar__m--em span { display: none; } }
/* довший заголовок першого екрану: трохи менший кегль, акцент на «770 м без жодного стику» */
.hero__title--long { font-size: clamp(1.9rem, 7vw, 3.9rem); line-height: 1; max-width: 17ch; text-wrap: balance; }
.hero__title--long .hero__title-k { display: block; color: var(--accent); margin-top: .12em; }
.line__duo { grid-column: 1 / -1; }