@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg: #f4f6f4;
  --bg-card: #ffffff;
  --bg-mute: #e8eee9;
  --ink: #0c1210;
  --ink-2: #2c3532;
  --ink-3: #5a6763;
  --line: #d4dcd8;
  --accent: #156b5c;
  --accent-d: #0d4a40;
  --accent-soft: rgba(21, 107, 92, 0.12);
  --accent-glow: rgba(21, 107, 92, 0.08);
  --max: 1120px;
  --max-narrow: 640px;
  --sans: 'Manrope', system-ui, sans-serif;
  --serif: 'Manrope', system-ui, sans-serif;
  --ease: cubic-bezier(0.25, 1, 0.5, 1);
  --paper: var(--bg);
  --paper-2: #ecf1ed;
  --paper-3: #e0e8e3;
  --ruled: var(--line);
  --water: var(--accent);
  --water-d: var(--accent-d);
  --water-l: #3d9a86;
  --water-pale: #e6f2ef;
  --water-tint: var(--accent-glow);
  --green-tick: #156b5c;
  --red-pen: #b42318;
  --yellow-hl: #eef7f4;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(21, 107, 92, 0.06), transparent 50%),
    var(--bg);
  color: var(--ink-2);
  line-height: 1.65;
  overflow-x: hidden;
  font-weight: 400;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--accent-d); text-underline-offset: 3px; }
.wrap { width: min(100% - 40px, var(--max)); margin-inline: auto; position: relative; }
.wrap--narrow { max-width: var(--max-narrow); }

/* ── Sticky nav ── */
.os-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(244, 246, 244, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.os-nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.os-nav__brand {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}
.os-nav__brand span { color: var(--accent); }
.os-nav__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
}
.os-nav__links a {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  text-decoration: none;
}
.os-nav__links a:hover { color: var(--accent-d); }
.os-nav__cta {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--accent);
  color: #fff !important;
  padding: 10px 18px;
  text-decoration: none;
}
.os-nav__cta:hover { background: var(--accent-d); }

/* ── Masthead (legacy pages) ── */
.masthead {
  border-bottom: 1px solid var(--line);
  padding: 18px 0 16px;
  background: var(--bg);
}
.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.masthead-logo { display: flex; flex-direction: column; line-height: 1.15; }
.logo-title {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
}
.logo-sub {
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  margin-top: 4px;
}
.masthead-meta {
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: right;
}
.masthead-cta {
  font-size: 11px;
  font-weight: 700;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.masthead-cta:hover { background: var(--accent-d); color: #fff; }

/* ── Buttons ── */
.btn-zen {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--accent);
  color: #fff;
  padding: 15px 28px;
  text-decoration: none;
  border: none;
  transition: background 0.2s;
}
.btn-zen:hover { background: var(--accent-d); color: #fff; }
.btn-zen--ghost {
  background: transparent;
  color: var(--ink);
  border: 2px solid var(--ink);
}
.btn-zen--ghost:hover { background: var(--ink); color: #fff; }
.btn-zen--light {
  background: #fff;
  color: var(--accent-d);
}
.btn-zen--light:hover { background: var(--bg-mute); color: var(--accent-d); }

/* ── Hero split ── */
.os-hero {
  padding: clamp(32px, 6vw, 56px) 0 clamp(48px, 8vw, 80px);
}
.os-hero__grid {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 420px);
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}
.os-hero__eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.os-hero__title {
  font-size: clamp(1.85rem, 4.2vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  color: var(--ink);
  max-width: 14ch;
}
.os-hero__lead {
  margin-top: 22px;
  font-size: 16px;
  color: var(--ink-3);
  max-width: 38rem;
  line-height: 1.75;
}
.os-hero__tags {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.os-tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: var(--bg-card);
  color: var(--ink-3);
}
.os-hero__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.os-hero__note {
  margin-top: 18px;
  font-size: 12px;
  color: var(--ink-3);
  max-width: 34rem;
  line-height: 1.65;
}

.os-mosaic {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto minmax(140px, 1fr);
  gap: 8px;
  align-content: start;
}
.os-mosaic__cell {
  overflow: hidden;
  border-radius: 3px;
  border: 1px solid var(--line);
  background: var(--bg-mute);
  min-height: 140px;
}
.os-mosaic__cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.os-mosaic__cell--wide {
  grid-column: 1 / -1;
  min-height: 160px;
  max-height: 220px;
}

/* Photo strip */
.os-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.os-strip__img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-right: 1px solid var(--line);
}
.os-strip__img:last-child { border-right: none; }
.os-strip__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92);
  transition: transform 0.5s var(--ease);
}
.os-strip__img:hover img { transform: scale(1.04); }
.os-strip--tri {
  grid-template-columns: repeat(3, 1fr);
}

/* Zigzag band */
.os-band { padding: clamp(56px, 10vw, 96px) 0; }
.os-band--paper { background: var(--bg-card); }
.os-band--mute { background: var(--water-pale); }
.os-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 6vw, 64px);
  align-items: center;
}
.os-split--flip .os-split__text { order: 2; }
.os-split--flip .os-split__visual { order: 1; }
.os-split__visual {
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 4/3;
}
.os-split__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.os-split__k {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.os-split__h {
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 14px;
}
.os-split__p {
  font-size: 15px;
  color: var(--ink-3);
  line-height: 1.8;
}

/* Diagram section — side view */
.os-dia {
  padding: clamp(56px, 10vw, 100px) 0;
  border-top: 1px solid var(--line);
}
.os-dia__single {
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg-card);
  max-width: 720px;
}
.os-dia__single img {
  width: 100%;
  height: auto;
  display: block;
}
.os-dia__intro {
  max-width: 38rem;
  margin-bottom: 40px;
}
.os-dia__k {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.os-dia__h {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.os-dia__sub {
  font-size: 15px;
  color: var(--ink-3);
  line-height: 1.75;
}
.os-dia__pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.os-dia__panel {
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: clamp(20px, 4vw, 32px);
}
.os-dia__panel--dark {
  background: var(--ink);
  border-color: var(--ink);
  color: rgba(255, 255, 255, 0.88);
}
.os-dia__cap {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--ink-3);
}
.os-dia__panel--dark .os-dia__cap {
  color: rgba(255, 255, 255, 0.5);
}
.os-dia__svg {
  max-width: 100%;
  height: auto;
  margin-bottom: 14px;
}
.os-dia__legend {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-3);
}
.os-dia__panel--dark .os-dia__legend {
  color: rgba(255, 255, 255, 0.55);
}
.os-dia__keynum {
  font-size: 36px;
  font-weight: 300;
  letter-spacing: -0.03em;
  color: var(--line);
  margin-bottom: 6px;
}
.os-dia__panel--dark .os-dia__keynum {
  color: rgba(255, 255, 255, 0.2);
}

/* Science timeline */
.os-sci {
  padding: clamp(56px, 10vw, 100px) 0;
  background: var(--bg-card);
  border-top: 1px solid var(--line);
}
.os-sci__head { margin-bottom: 40px; max-width: 40rem; }
.os-sci__k {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.os-sci__h {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
}
.os-sci__lead {
  font-size: 15px;
  color: var(--ink-3);
  line-height: 1.75;
}
.os-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--accent);
  margin-left: 12px;
  padding-left: 0;
}
.os-tl-item {
  position: relative;
  padding: 24px 24px 24px 28px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.os-tl-item:last-child { border-bottom: none; }
.os-tl-item::before {
  content: '';
  position: absolute;
  left: -15px;
  top: 28px;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--bg);
}
.os-tl-item__n {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 8px;
}
.os-tl-item__t {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.os-tl-item__body {
  font-size: 14px;
  color: var(--ink-3);
  line-height: 1.75;
  margin-bottom: 12px;
}
.os-tl-item__src {
  font-size: 12px;
  color: var(--ink-2);
  line-height: 1.55;
}
.os-tl-item__src a { font-weight: 600; }

/* Product showcase */
.os-prod {
  padding: clamp(56px, 10vw, 100px) 0;
  border-top: 1px solid var(--line);
}
.os-prod__head { margin-bottom: 32px; }
.os-prod__gallery {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 10px;
  margin-bottom: 36px;
  min-height: 280px;
}
.os-prod__shot--hero {
  grid-column: 1;
  grid-row: 1 / -1;
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.os-prod__shot--hero img {
  max-height: 280px;
  width: auto;
  object-fit: contain;
}
.os-prod__shot {
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
  background: #fff;
}
.os-prod__shot img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 8px;
}
.os-prod__layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: start;
}
.os-prod__spec {
  border: 1px solid var(--line);
  padding: 20px;
  background: var(--bg-card);
}
.os-prod__spec dl {
  display: grid;
  gap: 12px;
}
.os-prod__spec dt {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.os-prod__spec dd {
  font-size: 14px;
  color: var(--ink-2);
}

/* Steps horizontal */
.os-steps {
  padding: clamp(48px, 9vw, 88px) 0;
  background: linear-gradient(180deg, var(--water-pale) 0%, var(--bg) 100%);
  border-top: 1px solid var(--line);
}
.os-steps__bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.os-step-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 24px 20px;
  text-align: left;
  position: relative;
  padding-top: 48px;
}
.os-step-card__blob {
  position: absolute;
  top: 16px;
  left: 20px;
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.os-step-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}
.os-step-card p {
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.7;
}

/* CTA */
.os-cta {
  padding: clamp(44px, 8vw, 72px) 0;
  background: var(--ink);
  color: rgba(255, 255, 255, 0.65);
}
.os-cta__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
}
.os-cta__grid h2 {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}
.os-cta__note {
  font-size: 10px;
  margin-top: 10px;
  opacity: 0.55;
  letter-spacing: 0.06em;
}

/* FAQ */
.os-faq {
  padding: 56px 0 72px;
  border-top: 1px solid var(--line);
}
.os-faq__wrap {
  max-width: 560px;
  margin: 0 auto;
}
.faq-item-min {
  border-bottom: 1px solid var(--line);
}
.faq-q-min {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 18px 0;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.faq-q-min:hover { color: var(--accent-d); }
.faq-toggle-min {
  font-size: 20px;
  font-weight: 300;
  color: var(--ink-3);
  transition: transform 0.25s var(--ease);
}
.faq-item-min.open .faq-toggle-min {
  transform: rotate(45deg);
  color: var(--accent);
}
.faq-a-min {
  max-height: 0;
  overflow: hidden;
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.7;
  transition: max-height 0.35s var(--ease), padding 0.25s;
}
.faq-item-min.open .faq-a-min {
  max-height: 320px;
  padding-bottom: 18px;
}

/* Legal strip */
.os-legal {
  padding: 28px 0 36px;
  background: #070908;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.os-legal p {
  font-size: 11px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.45);
  max-width: 720px;
}
.os-legal strong { color: rgba(255, 255, 255, 0.65); font-weight: 600; }

/* Footer */
.site-footer {
  background: #050706;
  color: rgba(255, 255, 255, 0.42);
  padding: 32px 0 24px;
  font-size: 11px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}
.footer-brand .f-logo {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.88);
}
.footer-brand p {
  max-width: 280px;
  margin-top: 8px;
  line-height: 1.65;
}
.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.38);
  text-decoration: none;
}
.footer-links a:hover { color: rgba(255, 255, 255, 0.85); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

/* Legacy subpage helpers */
.section-rule {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.rule-line { flex: 1; height: 1px; background: var(--line); }
.rule-text {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
}
.section-h {
  font-size: clamp(1.4rem, 2.8vw, 1.85rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.reveal.vis { opacity: 1; transform: none; }
.rl {
  opacity: 0;
  transform: translateX(-14px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.rl.vis { opacity: 1; transform: none; }
.rr {
  opacity: 0;
  transform: translateX(14px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.rr.vis { opacity: 1; transform: none; }
.d1 { transition-delay: 0.06s; }
.d2 { transition-delay: 0.12s; }

/* ═══ LP Chiluxendo — layout ze zdjęciami (2026) ═══ */
.os-nav--elevated {
  box-shadow: 0 8px 32px rgba(12, 18, 16, 0.06);
}

.os-hero--full {
  position: relative;
  overflow: hidden;
  background: linear-gradient(155deg, #071815 0%, #124a42 42%, #156b5c 72%, #0a2822 100%);
  color: rgba(255, 255, 255, 0.92);
  padding: clamp(52px, 9vw, 110px) 0 clamp(60px, 10vw, 120px);
}
.os-hero--full .os-hero__eyebrow {
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.14em;
  margin-bottom: 18px;
}
.os-hero--full .os-hero__title {
  color: #fff;
  max-width: 22ch;
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.15rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
}
.os-hero--full .os-hero__lead {
  color: rgba(255, 255, 255, 0.78);
  max-width: 46rem;
  font-size: clamp(1rem, 1.35vw, 1.125rem);
  line-height: 1.8;
  margin-top: 22px;
}
.os-hero--full .os-hero__lead strong { color: #fff; font-weight: 600; }
.os-hero--full .os-tag {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.88);
}
.os-hero__bg-art {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.os-hero__bg-art::before,
.os-hero__bg-art::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.4;
}
.os-hero__bg-art::before {
  width: min(65vw, 460px);
  height: min(65vw, 460px);
  background: #2a9d86;
  top: -18%;
  right: -8%;
}
.os-hero__bg-art::after {
  width: min(55vw, 380px);
  height: min(55vw, 380px);
  background: rgba(100, 200, 180, 0.35);
  bottom: -22%;
  left: -12%;
}
.os-hero__layout {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}
.os-hero__side-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.os-hero__figure {
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.38);
  background: rgba(0, 0, 0, 0.15);
}
.os-hero__figure img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 1;
  object-fit: cover;
}
.os-hero__side-panel {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 18px;
  padding: 28px 26px;
  background: rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(14px);
}
.os-hero__side-panel .hp-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.55;
  margin-bottom: 14px;
}
.os-hero__side-panel p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}
.os-hero--full .btn-zen {
  background: #fff;
  color: var(--accent-d);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}
.os-hero--full .btn-zen:hover {
  background: var(--water-pale);
  color: var(--accent-d);
}
.os-hero--full .btn-zen--ghost {
  border: 2px solid rgba(255, 255, 255, 0.45);
  color: #fff;
  background: transparent;
}
.os-hero--full .btn-zen--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.65);
  color: #fff;
}

.os-section {
  padding: clamp(56px, 10vw, 96px) 0;
}
.os-section--lift {
  margin-top: -32px;
  padding-top: 0;
}
.os-section--lift .wrap {
  background: var(--bg-card);
  border-radius: 20px;
  border: 1px solid var(--line);
  padding: clamp(36px, 6vw, 56px) clamp(28px, 5vw, 48px);
  box-shadow: 0 24px 80px rgba(13, 74, 64, 0.08);
}
.os-section__head { margin-bottom: 36px; max-width: 720px; }
.os-section__k {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.os-section__h {
  font-size: clamp(1.45rem, 2.8vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 14px;
  line-height: 1.15;
}
.os-section__lead {
  font-size: 16px;
  color: var(--ink-3);
  line-height: 1.75;
}

.os-pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.os-pillar {
  padding: 26px 22px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fafcfb 0%, var(--bg-card) 100%);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.os-pillar:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(13, 74, 64, 0.1);
}
.os-pillar__n {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--accent);
  margin-bottom: 12px;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-d) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.os-pillar__t {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.os-pillar__p {
  font-size: 14px;
  color: var(--ink-3);
  line-height: 1.7;
}

.os-section--muted {
  background: linear-gradient(180deg, var(--water-pale) 0%, var(--bg) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.os-split-text {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 0.42fr);
  gap: clamp(28px, 5vw, 48px);
  align-items: start;
}
.os-split-text__aside {
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.os-split-text__fig {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 14px 44px rgba(13, 74, 64, 0.08);
  background: var(--bg-card);
}
.os-split-text__fig img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 11 / 8;
  object-fit: cover;
}
.os-prose {
  font-size: 16px;
  color: var(--ink-3);
  line-height: 1.85;
  max-width: 52rem;
}
.os-prose strong { color: var(--ink-2); font-weight: 600; }

.os-pullquote {
  margin: 0;
  padding: 26px 24px;
  border-left: 4px solid var(--accent);
  border-radius: 0 14px 14px 0;
  background: var(--bg-card);
  box-shadow: 0 12px 40px rgba(13, 74, 64, 0.07);
}
.os-pullquote p {
  font-size: 15px;
  font-style: italic;
  color: var(--ink-2);
  line-height: 1.75;
}

.os-prod-long .os-prose-stack {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 28px;
}
.os-prod-long .os-prose-stack p {
  font-size: 16px;
  color: var(--ink-3);
  line-height: 1.85;
  max-width: 52rem;
}

.os-prod-long__gallery {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 32px;
  align-items: stretch;
}
.os-prod-long__gallery-main {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-card);
  min-height: 200px;
}
.os-prod-long__gallery-main img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  display: block;
}
.os-prod-long__gallery-side {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 14px;
  min-height: 0;
}
.os-prod-long__gallery-cell {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-card);
  min-height: 0;
}
.os-prod-long__gallery-cell img {
  width: 100%;
  height: 100%;
  min-height: 120px;
  object-fit: cover;
  display: block;
}

.os-checklist {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.os-checklist li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.65;
}
.os-checklist li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-d));
}

.os-spec-card {
  padding: 28px 26px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--water-pale);
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}
.os-spec-card__dl {
  display: grid;
  gap: 14px;
  flex: 1;
  min-width: 220px;
}
.os-spec-card__dl dt {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 4px;
}
.os-spec-card__dl dd {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.os-section--sci {
  background: var(--bg-card);
  border-top: 1px solid var(--line);
}
.os-sci-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.os-sci-card {
  padding: 26px 22px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--bg);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.os-sci-card:hover {
  border-color: rgba(21, 107, 92, 0.35);
  box-shadow: 0 12px 36px rgba(13, 74, 64, 0.08);
}
.os-sci-card__badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 12px;
}
.os-sci-card__t {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.os-sci-card__p {
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.65;
  margin-bottom: 14px;
}
.os-sci-card__link {
  font-size: 13px;
  font-weight: 600;
}

.os-section--steps {
  background: linear-gradient(180deg, var(--bg) 0%, var(--water-pale) 55%, var(--bg) 100%);
}
.os-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.os-section--steps .os-step-card {
  border-radius: 16px;
  padding-top: 52px;
  box-shadow: 0 8px 32px rgba(13, 74, 64, 0.06);
}

.os-cta--gradient {
  background: linear-gradient(125deg, var(--accent-d) 0%, var(--accent) 48%, #0f5c50 100%);
  border: none;
}
.os-cta--gradient h2 {
  color: #fff;
}
.os-cta__lead {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.75;
  margin-top: 8px;
}
.os-cta--gradient .btn-zen--light {
  background: #fff;
  color: var(--accent-d);
}
.os-cta--gradient .btn-zen--light:hover {
  background: rgba(255, 255, 255, 0.92);
}
.os-cta--gradient .os-cta__note {
  color: rgba(255, 255, 255, 0.5);
}

.os-section--faq {
  padding-bottom: 72px;
}

@media (max-width: 960px) {
  .os-hero__layout { grid-template-columns: 1fr; }
  .os-prod-long__gallery {
    grid-template-columns: 1fr;
  }
  .os-prod-long__gallery-side {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: none;
  }
  .os-section--lift { margin-top: 0; padding-top: clamp(40px, 8vw, 64px); }
  .os-pillar-grid,
  .os-sci-cards,
  .os-steps-grid { grid-template-columns: 1fr; }
  .os-split-text { grid-template-columns: 1fr; }
  .os-hero__grid { grid-template-columns: 1fr; }
  .os-mosaic { max-height: 360px; }
  .os-strip { grid-template-columns: repeat(3, 1fr); }
  .os-strip__img:nth-child(4),
  .os-strip__img:nth-child(5) { display: none; }
  .os-split { grid-template-columns: 1fr; }
  .os-split--flip .os-split__text,
  .os-split--flip .os-split__visual { order: unset; }
  .os-dia__pair { grid-template-columns: 1fr; }
  .os-prod__gallery {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }
  .os-prod__shot--hero { grid-row: span 1; grid-column: span 2; min-height: 200px; }
  .os-prod__layout { grid-template-columns: 1fr; }
  .os-steps__bar { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .os-strip { grid-template-columns: 1fr 1fr; }
  .os-strip__img:nth-child(3) { display: none; }
  .os-strip--tri {
    grid-template-columns: 1fr;
  }
  .os-strip--tri .os-strip__img:nth-child(3) {
    display: block;
  }
  .os-prod-long__gallery-side {
    grid-template-columns: 1fr;
  }
  .os-nav__links { display: none; }
}