/* ============================================================
   INVERSIS — site-wide layout (new design system)
   Used by: home, category pages, product pages
   Loaded after colors_and_type.css
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img { max-width: 100%; display: block; }

body {
  background: var(--inv-paper);
  color: var(--inv-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

/* ---------- Layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-8);
}
.wrap--narrow { max-width: 1080px; }
.section-pad { padding: var(--sp-20) 0; }
.section-pad-sm { padding: var(--sp-12) 0; }

/* =============================================================
   Header / Nav
   ============================================================= */
.site-header {
  background: var(--inv-paper);
  border-bottom: 1px solid transparent;
  position: relative;
  z-index: 50;
}
.site-header__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--sp-5) var(--sp-8);
  display: grid;
  grid-template-columns: 200px 1fr 200px;
  align-items: center;
  gap: var(--sp-6);
}
.site-header__logo img {
  height: 38px;
  width: auto;
}
.site-header__nav {
  display: flex;
  justify-content: center;
  gap: var(--sp-10);
  align-items: center;
}
.site-header__nav a {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--inv-ink);
  text-decoration: none;
  padding: var(--sp-2) 0;
  position: relative;
  transition: color var(--t-base) var(--ease-out);
}
.site-header__nav a:hover { color: var(--inv-orange); }
.site-header__nav a.is-active {
  color: var(--inv-orange);
  font-weight: 600;
}
.site-header__nav a.is-active::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--inv-orange);
}
.site-header__actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--sp-4);
}

/* Lang toggle */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--inv-ink-3);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.lang-toggle button {
  background: transparent;
  border: 0;
  padding: 0;
  font: inherit;
  cursor: pointer;
  color: var(--inv-ink-3);
}
.lang-toggle button.is-active { color: var(--inv-orange); }
.lang-toggle .lang-sep { color: var(--inv-line-2); }

/* =============================================================
   Breadcrumb
   ============================================================= */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--sp-6) var(--sp-8) 0;
  display: flex;
  gap: var(--sp-3);
  align-items: center;
  font-size: 14px;
  color: var(--inv-ink-3);
}
.breadcrumb a { color: var(--inv-ink-3); text-decoration: none; }
.breadcrumb a:hover { color: var(--inv-orange); }
.breadcrumb .sep { color: var(--inv-ink-4); }
.breadcrumb .current { color: var(--inv-orange); font-weight: 500; }

/* =============================================================
   Page eyebrow (— KATEGORIA 01 / ENERGETYKA)
   ============================================================= */
.page-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--inv-orange);
  margin-bottom: var(--sp-5);
}
.page-eyebrow::before {
  content: '';
  width: 22px;
  height: 2px;
  background: var(--inv-orange);
}

/* =============================================================
   Hero (category / product / home)
   ============================================================= */
.hero {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--sp-6) var(--sp-8) var(--sp-10);
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: var(--sp-16);
  align-items: center;
}
.hero__copy h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(48px, 5.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--inv-ink);
  margin: 0 0 var(--sp-6);
  text-transform: none;
}
.hero__copy h1 .dot { color: var(--inv-orange); }
.hero__lead {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 21px;
  line-height: 1.45;
  color: var(--inv-ink-2);
  margin: 0 0 var(--sp-5);
  max-width: 28ch;
}
.hero__desc {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--inv-ink-3);
  margin: 0 0 var(--sp-8);
  max-width: 45ch;
}
.hero__media {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero__media img {
  width: 100%;
  height: auto;
  max-height: 460px;
  object-fit: contain;
}

/* =============================================================
   Buttons
   ============================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-4);
  padding: 14px 26px;
  border: none;
  background: transparent;
  border-radius: var(--r-3);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0;
  cursor: pointer;
  transition: background var(--t-base) var(--ease-out), color var(--t-base) var(--ease-out), border-color var(--t-base) var(--ease-out), box-shadow var(--t-base) var(--ease-out);
  text-decoration: none;
  line-height: 1;
}
.btn .arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 11px;
  transition: transform var(--t-base) var(--ease-out);
}
.btn .arrow svg { width: 22px; height: 11px; }

.btn--primary {
  background: var(--inv-orange);
  color: var(--inv-white);
  box-shadow: var(--sh-cta);
}
.btn--primary:hover { background: var(--inv-orange-600); color: var(--inv-white); }
.btn--primary:hover .arrow { transform: translateX(3px); }

.btn--ghost {
  background: transparent;
  color: var(--inv-white);
  border: 1px solid var(--inv-white);
}
.btn--ghost:hover { background: rgba(255,255,255,.08); }

.btn--outline {
  background: transparent;
  color: var(--inv-ink);
  border: 1px solid var(--inv-line-2);
}
.btn--outline:hover { border-color: var(--inv-orange); color: var(--inv-orange); }

/* small inline link with arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--inv-orange);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  transition: gap var(--t-base) var(--ease-out);
}
.link-arrow:hover { color: var(--inv-orange-600); gap: var(--sp-3); }
.link-arrow svg { width: 16px; height: 10px; }

/* =============================================================
   Parameters strip (4 cells with icon)
   ============================================================= */
.params-strip {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--sp-8);
}
.params-strip__inner {
  background: var(--inv-paper-2);
  border-radius: var(--r-3);
  padding: var(--sp-6) var(--sp-8);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
}
.param {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}
.param__icon {
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: var(--inv-white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--inv-orange);
}
.param__icon svg { width: 26px; height: 26px; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.param__text { display: flex; flex-direction: column; gap: 2px; }
.param__label {
  font-size: 11px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--inv-ink-3);
  font-weight: 600;
}
.param__value {
  font-size: 15px;
  color: var(--inv-ink);
  font-weight: 500;
  line-height: 1.25;
}

/* =============================================================
   Section heading (centered with orange underline)
   ============================================================= */
.section-head {
  text-align: center;
  margin-bottom: var(--sp-12);
}
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(34px, 3.5vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--inv-ink);
  margin: 0;
  text-transform: none;
  display: inline-block;
  position: relative;
}
.section-head h2::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -10px;
  width: 70px;
  height: 3px;
  background: var(--inv-orange);
  transform: translateX(-50%);
}
.section-head__sub {
  margin-top: var(--sp-6);
  color: var(--inv-ink-3);
  font-size: 16px;
}

/* =============================================================
   Solutions / scenarios cards (white tile, big render)
   ============================================================= */
.sol-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-5);
}
.sol-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sol-grid--2 { grid-template-columns: repeat(2, 1fr); }

.sol-card {
  background: var(--inv-white);
  border: 1px solid var(--inv-line);
  border-radius: var(--r-3);
  padding: var(--sp-6) var(--sp-6) var(--sp-5);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--t-base) var(--ease-out), transform var(--t-base) var(--ease-out), box-shadow var(--t-base) var(--ease-out);
  position: relative;
}
.sol-card:hover {
  border-color: var(--inv-orange);
  transform: translateY(-2px);
  box-shadow: var(--sh-2);
}
.sol-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.2;
  color: var(--inv-ink);
  margin: 0 0 var(--sp-5);
  min-height: 2.4em;
  text-transform: none;
  letter-spacing: -0.005em;
}
.sol-card__media {
  width: 100%;
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-5);
  overflow: hidden;
}
.sol-card__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.sol-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--inv-ink-2);
  margin: 0 0 var(--sp-6);
  flex: 1;
}
.sol-card__arrow {
  color: var(--inv-orange);
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
}
.sol-card__arrow svg { width: 24px; height: 12px; transition: transform var(--t-base) var(--ease-out); }
.sol-card:hover .sol-card__arrow svg { transform: translateX(3px); }

/* =============================================================
   Use-case / equipment cards (icon top-left, title, text)
   ============================================================= */
.use-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.use-grid--4 { grid-template-columns: repeat(4, 1fr); }

.use-card {
  background: var(--inv-white);
  border: 1px solid var(--inv-line);
  border-radius: var(--r-3);
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}
.use-card__icon {
  width: 44px;
  height: 44px;
  color: var(--inv-orange);
  display: flex;
  align-items: center;
}
.use-card__icon svg { width: 44px; height: 44px; stroke: currentColor; fill: none; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.use-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 20px;
  line-height: 1.2;
  text-transform: none;
  color: var(--inv-ink);
  margin: 0;
  letter-spacing: -0.005em;
}
.use-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--inv-ink-2);
  margin: 0;
}

/* =============================================================
   Related cards (icon halo + text + link)
   ============================================================= */
.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-5);
}
.related-card {
  background: var(--inv-white);
  border: 1px solid var(--inv-line);
  border-radius: var(--r-3);
  padding: var(--sp-6) var(--sp-8);
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}
.related-card__icon {
  width: 72px;
  height: 72px;
  border-radius: 999px;
  background: var(--inv-paper-2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--inv-ink-3);
}
.related-card__icon svg { width: 36px; height: 36px; stroke: currentColor; fill: none; stroke-width: 1.2; stroke-linecap: round; stroke-linejoin: round; }
.related-card__body { flex: 1; min-width: 0; }
.related-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 20px;
  text-transform: none;
  line-height: 1.25;
  margin: 0 0 var(--sp-2);
  color: var(--inv-ink);
  letter-spacing: -0.005em;
}
.related-card p {
  font-size: 14px;
  color: var(--inv-ink-3);
  margin: 0 0 var(--sp-3);
  line-height: 1.5;
}

/* =============================================================
   Process strip (5 numbered steps)
   ============================================================= */
.process-strip {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  align-items: start;
  gap: 0;
}
.process-step {
  grid-column: span 2;
  text-align: center;
  padding: 0 var(--sp-3);
}
.process-step__icon {
  width: 64px;
  height: 64px;
  border-radius: 999px;
  background: var(--inv-paper-2);
  margin: 0 auto var(--sp-4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--inv-ink-3);
}
.process-step__icon svg { width: 32px; height: 32px; stroke: currentColor; fill: none; stroke-width: 1.3; stroke-linecap: round; stroke-linejoin: round; }
.process-step__num {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--inv-orange);
  display: block;
  line-height: 1;
  margin-bottom: 4px;
}
.process-step h4 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  color: var(--inv-ink);
  margin: 0 0 var(--sp-3);
}
.process-step p {
  font-size: 13px;
  color: var(--inv-ink-3);
  margin: 0;
  line-height: 1.55;
}
.process-arrow {
  grid-column: span 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 18px;
  color: var(--inv-line-2);
}
.process-arrow svg { width: 26px; height: 12px; fill: none; stroke: currentColor; stroke-width: 1.2; }

/* =============================================================
   Dark CTA bar (above footer)
   ============================================================= */
.cta-bar {
  background: #18352E;
  color: var(--inv-white);
  padding: var(--sp-12) 0;
}
.cta-bar__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--sp-8);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--sp-8);
  align-items: center;
}
.cta-bar h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 var(--sp-3);
  text-transform: none;
  letter-spacing: -0.005em;
  color: var(--inv-white);
}
.cta-bar p {
  font-size: 15px;
  color: rgba(255,255,255,.7);
  margin: 0;
}
.cta-bar__actions {
  display: flex;
  gap: var(--sp-4);
  align-items: center;
}

/* =============================================================
   Footer
   ============================================================= */
.site-footer {
  background: var(--inv-paper);
  color: var(--inv-ink);
  padding: var(--sp-12) 0 var(--sp-6);
  border-top: 1px solid var(--inv-line);
}
.site-footer__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--sp-8);
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr 1.4fr;
  gap: var(--sp-10);
  margin-bottom: var(--sp-8);
}
.site-footer__brand img {
  height: 32px;
  margin-bottom: var(--sp-4);
}
.site-footer__tag {
  font-size: 13px;
  color: var(--inv-ink-3);
  margin: 0 0 var(--sp-5);
  line-height: 1.5;
  max-width: 24ch;
}
.site-footer__social {
  display: flex;
  gap: var(--sp-3);
}
.site-footer__social a {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--inv-ink-3);
  background: transparent;
  border: 1px solid var(--inv-line);
  transition: color var(--t-base) var(--ease-out), border-color var(--t-base) var(--ease-out);
}
.site-footer__social a:hover { color: var(--inv-orange); border-color: var(--inv-orange); }
.site-footer__social svg { width: 14px; height: 14px; fill: currentColor; }
.site-footer__col h4 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--inv-ink);
  margin: 0 0 var(--sp-4);
}
.site-footer__col a, .site-footer__col p {
  display: block;
  font-size: 14px;
  color: var(--inv-ink-2);
  text-decoration: none;
  margin-bottom: var(--sp-3);
  line-height: 1.5;
}
.site-footer__col a:hover { color: var(--inv-orange); }
.site-footer__col a.is-active { color: var(--inv-orange); }

.site-footer__contact {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px var(--sp-3);
  font-size: 14px;
  color: var(--inv-ink-2);
}
.site-footer__contact .ic {
  color: var(--inv-ink-3);
  display: flex;
  align-items: center;
  justify-content: center;
}
.site-footer__contact .ic svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.site-footer__contact a { color: var(--inv-ink-2); text-decoration: none; }
.site-footer__contact a:hover { color: var(--inv-orange); }

.site-footer__bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--sp-5) var(--sp-8) 0;
  border-top: 1px solid var(--inv-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-6);
  font-size: 13px;
  color: var(--inv-ink-3);
  flex-wrap: wrap;
}
.site-footer__bottom .legal {
  display: flex;
  gap: var(--sp-6);
}
.site-footer__bottom a { color: var(--inv-ink-3); text-decoration: none; }
.site-footer__bottom a:hover { color: var(--inv-orange); }

/* =============================================================
   Responsive
   ============================================================= */
@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; gap: var(--sp-10); }
  .params-strip__inner { grid-template-columns: repeat(2, 1fr); }
  .sol-grid, .sol-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .use-grid, .use-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .site-header__inner { grid-template-columns: 140px 1fr auto; }
  .site-header__nav { gap: var(--sp-5); }
  .process-strip { grid-template-columns: 1fr; }
  .process-step, .process-arrow { grid-column: 1; }
  .process-arrow { display: none; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 var(--sp-5); }
  .section-pad { padding: var(--sp-12) 0; }
  .params-strip__inner { grid-template-columns: 1fr; }
  .sol-grid, .sol-grid--3, .use-grid, .use-grid--4 { grid-template-columns: 1fr; }
  .cta-bar__inner { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-header__nav { display: none; }
}