:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-2: #eaf0f7;
  --ink: #101827;
  --muted: #5e6a7d;
  --dark: #07111f;
  --dark-2: #0c1b2e;
  --line: #d9e2ee;
  --accent: #35d0a3;
  --accent-2: #89f0d1;
  --accent-dark: #0f8a69;
  --radius: 22px;
  --shadow: 0 24px 70px rgba(7, 17, 31, .10);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 1000;
  padding: 10px 14px;
  background: var(--accent);
  color: var(--dark);
  border-radius: 10px;
  font-weight: 800;
}
.skip-link:focus { top: 12px; }

.container {
  width: min(calc(100% - 40px), var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 17, 31, .92);
  border-bottom: 1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(16px);
}
.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--accent);
  color: var(--dark);
  font-size: .92rem;
  font-weight: 900;
  letter-spacing: -.04em;
}
.brand-text { display: grid; line-height: 1.12; }
.brand-text strong { font-size: 1rem; letter-spacing: -.01em; }
.brand-text small { margin-top: 4px; color: #97a9c2; font-size: .68rem; text-transform: uppercase; letter-spacing: .16em; }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a {
  text-decoration: none;
  color: #c9d5e5;
  font-size: .93rem;
  font-weight: 650;
}
.main-nav a:hover, .main-nav a:focus-visible { color: #fff; }
.main-nav .nav-cta {
  padding: 10px 16px;
  border: 1px solid rgba(53,208,163,.46);
  border-radius: 999px;
  color: var(--accent-2);
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 10%, rgba(53,208,163,.14), transparent 32%),
    linear-gradient(180deg, var(--dark), #0a1727);
  color: #fff;
}
.hero-grid {
  position: absolute;
  inset: 0;
  opacity: .24;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, #000, transparent 90%);
}
.hero-inner {
  position: relative;
  min-height: 690px;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(360px, .94fr);
  align-items: center;
  gap: 68px;
  padding-block: 96px;
}
.eyebrow {
  margin: 0 0 16px;
  color: var(--accent-dark);
  font-size: .76rem;
  font-weight: 850;
  letter-spacing: .17em;
  text-transform: uppercase;
}
.hero .eyebrow, .section-dark .eyebrow { color: var(--accent-2); }
.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(2.7rem, 5.4vw, 5.25rem);
  line-height: .98;
  letter-spacing: -.055em;
}
.hero-lead {
  max-width: 690px;
  margin: 28px 0 0;
  color: #b9c8dc;
  font-size: clamp(1.05rem, 1.6vw, 1.24rem);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 13px 20px;
  border-radius: 13px;
  text-decoration: none;
  font-weight: 800;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.button:hover { transform: translateY(-2px); }
.button:focus-visible, a:focus-visible { outline: 3px solid rgba(53,208,163,.38); outline-offset: 3px; }
.button-primary { background: var(--accent); color: #041511; }
.button-primary:hover { background: var(--accent-2); }
.button-secondary { border: 1px solid rgba(255,255,255,.18); color: #fff; background: rgba(255,255,255,.04); }
.button-secondary:hover { border-color: rgba(255,255,255,.36); background: rgba(255,255,255,.08); }

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 48px 0 0;
  padding: 28px 0 0;
  border-top: 1px solid rgba(255,255,255,.10);
  list-style: none;
}
.hero-points li { display: grid; gap: 2px; }
.hero-points strong { color: #fff; font-size: 1.02rem; }
.hero-points span { color: #8497b1; font-size: .8rem; }

.hero-visual { display: grid; place-items: center; }
.board {
  position: relative;
  width: min(100%, 470px);
  aspect-ratio: 1.05;
  border: 1px solid rgba(137,240,209,.33);
  border-radius: 30px;
  background:
    linear-gradient(145deg, rgba(53,208,163,.12), rgba(53,208,163,.025)),
    #0d2130;
  box-shadow: 0 40px 100px rgba(0,0,0,.34), inset 0 0 0 10px rgba(255,255,255,.018);
  transform: perspective(900px) rotateY(-8deg) rotateX(4deg);
}
.board::before, .board::after {
  content: "";
  position: absolute;
  inset: 22px;
  border: 1px dashed rgba(137,240,209,.17);
  border-radius: 20px;
}
.board::after { inset: 42px; border-style: solid; opacity: .34; }
.chip {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  border: 1px solid rgba(137,240,209,.28);
  border-radius: 10px;
  background: #071721;
  color: var(--accent-2);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
  box-shadow: inset 0 0 0 5px rgba(255,255,255,.018);
}
.chip-a { width: 96px; height: 96px; left: 50%; top: 49%; transform: translate(-50%,-50%); }
.chip-b { width: 68px; height: 52px; left: 12%; top: 21%; }
.chip-c { width: 72px; height: 52px; right: 13%; top: 18%; }
.chip-d { width: 78px; height: 56px; right: 13%; bottom: 18%; }
.node { position: absolute; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 20px rgba(53,208,163,.7); }
.n1 { left: 21%; bottom: 20%; }.n2 { right: 33%; top: 17%; }.n3 { right: 24%; bottom: 37%; }
.trace { position: absolute; z-index: 1; border-color: rgba(53,208,163,.55); border-style: solid; }
.t1 { width: 33%; height: 24%; left: 25%; top: 25%; border-width: 1px 0 0 1px; }
.t2 { width: 28%; height: 27%; right: 21%; top: 28%; border-width: 1px 1px 0 0; }
.t3 { width: 32%; height: 22%; left: 24%; bottom: 22%; border-width: 0 0 1px 1px; }
.t4 { width: 29%; height: 26%; right: 20%; bottom: 24%; border-width: 0 1px 1px 0; }
.board-label { position: absolute; left: 44px; bottom: 45px; display: grid; color: #fff; line-height: 1; }
.board-label span { font-weight: 900; letter-spacing: .08em; }
.board-label small { margin-top: 6px; color: #7293a7; font-size: .52rem; letter-spacing: .26em; }

.section { padding-block: 108px; }
.section-heading { max-width: 720px; margin-bottom: 48px; }
.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.55rem);
  line-height: 1.04;
  letter-spacing: -.045em;
}
.section-heading > p:last-child { margin: 20px 0 0; color: var(--muted); font-size: 1.06rem; }

.cards { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.card {
  position: relative;
  min-height: 290px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 10px 36px rgba(7,17,31,.045);
}
.card-number { display: inline-block; margin-bottom: 38px; color: var(--accent-dark); font-weight: 850; font-size: .74rem; letter-spacing: .12em; }
.card h3 { margin: 0; font-size: 1.5rem; letter-spacing: -.025em; }
.card p { max-width: 520px; margin: 14px 0 48px; color: var(--muted); }
.card-tag { position: absolute; bottom: 30px; left: 34px; color: #8090a4; font-size: .72rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }

.section-dark { background: var(--dark); color: #fff; }
.section-heading-light > p:last-child { color: #a9b9cc; }
.process { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.12); }
.process li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  padding: 30px 0;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.process li > span { color: var(--accent); font-size: .84rem; font-weight: 900; }
.process h3 { margin: 0; font-size: 1.3rem; }
.process p { max-width: 720px; margin: 7px 0 0; color: #9fb0c3; }

.about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: start; }
.about-grid .section-heading { margin-bottom: 0; }
.about-copy { color: var(--muted); font-size: 1.08rem; }
.about-copy p:first-child { margin-top: 0; }
.about-facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 36px; }
.about-facts div { padding: 22px; border-radius: 16px; background: var(--surface-2); }
.about-facts strong, .about-facts span { display: block; }
.about-facts strong { color: var(--ink); font-size: 1.18rem; }
.about-facts span { margin-top: 4px; font-size: .83rem; }

.contact-section { padding-top: 0; }
.contact-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 60px;
  padding: 58px;
  border-radius: 30px;
  background: #eaf1f7;
}
.contact-grid h2 { max-width: 620px; margin: 0; font-size: clamp(2rem, 4vw, 3.7rem); line-height: 1.04; letter-spacing: -.045em; }
.contact-lead { max-width: 630px; margin: 20px 0 28px; color: var(--muted); }
.contact-card { padding: 30px; border: 1px solid #d5e0ea; border-radius: 20px; background: #fff; font-style: normal; box-shadow: var(--shadow); }
.contact-card h3 { margin-top: 0; }
.contact-card > p { color: var(--muted); }
.contact-card p span { display: block; margin-top: 18px; color: #8795a7; font-size: .7rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.contact-card p a { color: var(--ink); text-decoration: none; font-weight: 750; }
.text-link { display: inline-block; margin-top: 10px; color: var(--accent-dark); text-decoration: none; font-weight: 800; }

.site-footer { background: #050c15; color: #9babbe; }
.footer-inner { min-height: 180px; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 48px; }
.footer-inner strong { color: #fff; }
.footer-inner p { margin: 5px 0 0; font-size: .86rem; }
.footer-links { display: flex; gap: 22px; }
.footer-links a { color: #b9c7d6; text-decoration: none; font-size: .88rem; }
.copyright { white-space: nowrap; }

@media (max-width: 900px) {
  .main-nav { gap: 16px; }
  .main-nav a:not(.nav-cta) { display: none; }
  .hero-inner { grid-template-columns: 1fr; min-height: 0; padding-block: 82px; }
  .hero-visual { display: none; }
  .hero-copy { max-width: 780px; }
  .cards { grid-template-columns: 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .contact-grid { padding: 40px; }
  .footer-inner { grid-template-columns: 1fr; gap: 20px; padding-block: 42px; }
}

@media (max-width: 620px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .header-inner { min-height: 68px; }
  .brand-text small { display: none; }
  .main-nav .nav-cta { padding: 8px 13px; }
  .hero-inner { padding-block: 64px 68px; }
  .hero h1 { font-size: clamp(2.55rem, 12vw, 4rem); }
  .hero-points { grid-template-columns: 1fr; gap: 14px; }
  .section { padding-block: 78px; }
  .section-heading { margin-bottom: 34px; }
  .card { min-height: 250px; padding: 28px; }
  .card-number { margin-bottom: 26px; }
  .card-tag { left: 28px; bottom: 25px; }
  .process li { grid-template-columns: 42px 1fr; gap: 12px; }
  .about-facts { grid-template-columns: 1fr; }
  .contact-section { padding-top: 0; }
  .contact-grid { padding: 28px; border-radius: 22px; }
  .contact-card { padding: 24px; }
  .footer-links { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* --- Rozszerzenia: montaż PCB, produkty i rozwijana specyfikacja TSzB --- */
.trust-strip { background: #fff; border-bottom: 1px solid var(--line); }
.trust-grid { min-height: 72px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); align-items: center; gap: 18px; color: #516075; font-size: .86rem; font-weight: 800; text-align: center; }
.section-soft { background: #edf3f8; }
.wide-heading { max-width: 840px; }
.three-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.pcb-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 26px; align-items: stretch; }
.pcb-feature { padding: 38px; border-radius: var(--radius); background: var(--dark-2); color: #fff; box-shadow: var(--shadow); }
.pcb-feature p { color: #b7c6d7; }
.feature-kicker { display: inline-block; margin-bottom: 18px; color: var(--accent-2); font-size: .72rem; font-weight: 900; letter-spacing: .14em; }
.pcb-feature h3 { margin: 0; font-size: 2rem; }
.check-list, .feature-list { margin: 24px 0 0; padding: 0; list-style: none; }
.check-list li, .feature-list li { position: relative; padding-left: 27px; margin: 11px 0; }
.check-list li::before, .feature-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--accent-dark); font-weight: 900; }
.pcb-feature .check-list li::before { color: var(--accent); }
.pcb-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.mini-card { padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.mini-card > span { color: var(--accent-dark); font-size: .73rem; font-weight: 900; }
.mini-card h3 { margin: 24px 0 8px; font-size: 1.15rem; }
.mini-card p { margin: 0; color: var(--muted); font-size: .92rem; }
.pcb-cta { margin-top: 20px; padding: 24px 28px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.pcb-cta div { display: grid; gap: 3px; }
.pcb-cta span { color: var(--muted); font-size: .9rem; }

.product-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, .55fr); gap: 20px; align-items: start; }
.product-card { position: relative; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 10px 36px rgba(7,17,31,.045); }
.product-current { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 30px; }
.product-badge { position: absolute; right: 22px; top: 20px; padding: 7px 11px; border-radius: 999px; background: #e1f8f0; color: #087052; font-size: .65rem; font-weight: 900; letter-spacing: .11em; }
.product-photo-frame { margin: 0; border: 1px solid var(--line); border-radius: 16px; background: #f7fafc; overflow: hidden; }
.product-card-photo { align-self: start; margin-top: 28px; }
.product-card-photo img { width: 100%; height: auto; display: block; image-rendering: auto; }
.product-copy { padding-top: 28px; }
.product-copy h3 { margin: 0; font-size: clamp(1.5rem, 2.5vw, 2.15rem); line-height: 1.08; letter-spacing: -.035em; }
.product-copy > p:not(.eyebrow) { color: var(--muted); }
.product-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 22px; }
.product-archive { min-height: 100%; }
.archive-symbol { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; background: var(--surface-2); color: var(--accent-dark); font-size: 1.5rem; font-weight: 900; }
.button-outline { border: 1px solid #b9c9d9; background: #fff; color: var(--ink); }
.button-light { border: 1px solid rgba(7,17,31,.12); background: #fff; color: var(--ink); }

.product-details { grid-column: 1 / -1; margin-top: 4px; border-top: 1px solid var(--line); padding-top: 22px; }
.product-details > summary { width: fit-content; cursor: pointer; list-style: none; user-select: none; border: 0; }
.product-details > summary::-webkit-details-marker { display: none; }
.product-details > summary::marker { content: ""; }
.details-state::before { content: "+"; display: inline-block; margin-left: 10px; font-size: 1.15rem; line-height: 1; font-weight: 900; }
.product-details[open] .details-state::before { content: "−"; }
.product-details[open] > summary { margin-bottom: 28px; }
.product-details-content { padding: 34px; border: 1px solid var(--line); border-radius: 20px; background: #f7fafc; }
.details-intro { max-width: 900px; }
.details-intro h4, .details-section > h4 { margin: 0; font-size: clamp(1.45rem, 2.5vw, 2.15rem); line-height: 1.15; letter-spacing: -.035em; }
.details-intro > p:last-child { color: var(--muted); }
.details-section { margin-top: 42px; padding-top: 34px; border-top: 1px solid var(--line); }
.feature-list { color: var(--muted); }
.feature-list.two-columns { columns: 2; column-gap: 42px; }
.feature-list.two-columns li { break-inside: avoid; margin-top: 0; margin-bottom: 12px; }
.spec-highlights { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 28px; }
.spec-highlights > div { padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.spec-highlights span, .spec-highlights strong, .spec-highlights small { display: block; }
.spec-highlights span { color: #7b8a9d; font-size: .7rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.spec-highlights strong { margin-top: 6px; font-size: 1rem; }
.spec-highlights small { margin-top: 3px; color: var(--muted); }
.technical-note { margin: 10px 0 0; color: var(--muted); font-size: .8rem; }
.measurement-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 22px; }
.measurement-card { padding: 22px; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.measurement-card > strong { color: var(--accent-dark); font-size: .7rem; letter-spacing: .1em; }
.measurement-card h5 { margin: 12px 0 7px; font-size: 1.05rem; }
.measurement-card p { margin: 0; color: var(--muted); font-size: .9rem; }
.table-wrap { margin-top: 22px; overflow-x: auto; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.spec-table { width: 100%; min-width: 860px; border-collapse: collapse; font-size: .88rem; }
.spec-table th, .spec-table td { padding: 13px 15px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.spec-table th { position: sticky; top: 0; background: #e8f0f6; color: #26364a; font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; }
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table td:first-child { font-weight: 750; color: #25364b; }
.details-footer-grid { display: grid; grid-template-columns: 1fr .8fr; gap: 24px; }
.details-footer-grid p { color: var(--muted); }
.details-contact { padding: 24px; border-radius: 16px; background: #e8f3ef; }
.details-contact h4 { margin: 0; font-size: 1.25rem; }
.details-contact .button { margin-top: 8px; }

@media (max-width: 900px) {
  .trust-grid { grid-template-columns: repeat(2, 1fr); padding-block: 16px; }
  .three-cards, .pcb-layout, .product-grid { grid-template-columns: 1fr; }
  .product-current { grid-template-columns: 180px minmax(0, 1fr); }
  .pcb-cta { align-items: flex-start; flex-direction: column; }
  .spec-highlights { grid-template-columns: repeat(2, 1fr); }
  .details-footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .pcb-cards, .measurement-grid, .spec-highlights { grid-template-columns: 1fr; }
  .product-current { grid-template-columns: 1fr; }
  .product-card-photo { width: min(100%, 320px); margin-top: 34px; }
  .product-copy { padding-top: 0; }
  .product-badge { left: 22px; right: auto; }
  .product-details-content { padding: 22px; }
  .feature-list.two-columns { columns: 1; }
}