:root {
  --navy: #0a2647;
  --slate: #5c6b7a;
  --green: #1b7a46;
  --cyan: #00b8c9;
  --paper: #f7f4ef;
  --warm: #fffdf8;
  --charcoal: #241f1a;
  --line: #d7d2ca;
  --shadow: 0 24px 70px rgba(10, 38, 71, 0.14);
  --max: 1180px;
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--charcoal);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--navy);
  background: var(--warm);
  border: 1px solid var(--line);
  border-radius: 6px;
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 44px;
  color: var(--navy);
  background: rgba(247, 244, 239, 0.95);
  border-bottom: 1px solid rgba(10, 38, 71, 0.08);
  backdrop-filter: blur(14px);
}

.site-header.is-scrolled,
.site-header.is-open { box-shadow: 0 16px 38px rgba(10, 38, 71, 0.1); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand__mark {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.brand__wordmark {
  display: grid;
  gap: 0;
  color: var(--navy);
  font-size: 1rem;
  font-weight: 900;
  line-height: 0.9;
  text-transform: uppercase;
}

.brand__wordmark span {
  color: var(--green);
  letter-spacing: 0.16em;
}

.brand__wordmark small {
  margin-top: 7px;
  color: var(--slate);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--navy);
  font-size: 0.78rem;
  font-weight: 850;
  text-transform: uppercase;
}

.site-nav a,
.footer-nav a {
  position: relative;
  padding: 8px 0;
}

.site-nav a::after,
.footer-nav a::after {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  content: "";
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.footer-nav a:hover::after,
.footer-nav a:focus-visible::after { transform: scaleX(1); }

.back-link {
  color: var(--green);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid rgba(10, 38, 71, 0.25);
  border-radius: 6px;
  color: inherit;
  background: transparent;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: currentColor;
}

.sticky-cta {
  position: fixed;
  z-index: 28;
  left: 14px;
  right: 14px;
  bottom: 14px;
  display: none;
  gap: 8px;
  padding: 8px;
  border: 1px solid rgba(10, 38, 71, 0.12);
  border-radius: 8px;
  background: rgba(247, 244, 239, 0.97);
  box-shadow: 0 18px 48px rgba(10, 38, 71, 0.18);
  backdrop-filter: blur(14px);
  transform: translateY(140%);
  transition: transform 180ms ease;
}

.sticky-cta.is-visible { transform: translateY(0); }

.sticky-cta a {
  display: inline-flex;
  flex: 1;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  color: var(--navy);
  background: var(--cyan);
  font-size: 0.78rem;
  font-weight: 900;
  text-align: center;
  text-transform: uppercase;
}

.catalogue-hero,
.part-hero {
  position: relative;
  display: grid;
  width: min(var(--max), calc(100% - 88px));
  margin: 0 auto;
  padding: 150px 0 72px;
}

.catalogue-hero {
  min-height: 610px;
  align-content: end;
}

.catalogue-hero--compact {
  min-height: 430px;
}

.catalogue-hero::before,
.part-hero::before {
  position: absolute;
  inset: 96px -44px 0;
  z-index: -1;
  content: "";
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(10, 38, 71, 0.96), rgba(10, 38, 71, 0.76)),
    radial-gradient(circle at 85% 18%, rgba(0, 184, 201, 0.32), transparent 30%),
    linear-gradient(120deg, var(--navy), #14385d);
}

.catalogue-hero h1,
.part-hero h1 {
  max-width: 930px;
  margin: 0;
  color: var(--warm);
  font-size: 4.55rem;
  line-height: 0.96;
}

.catalogue-hero p:not(.eyebrow),
.part-hero p:not(.eyebrow) {
  max-width: 760px;
  margin: 24px 0 0;
  color: rgba(247, 244, 239, 0.8);
  font-size: 1.16rem;
  line-height: 1.7;
}

.eyebrow,
.mini-eyebrow {
  margin: 0 0 16px;
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.catalogue-hero .eyebrow,
.part-hero .eyebrow {
  color: var(--cyan);
}

.hero__actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0;
  text-align: center;
  text-transform: uppercase;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(10, 38, 71, 0.14);
}

.button--primary {
  color: var(--navy);
  background: var(--cyan);
}

.button--secondary,
.button--ghost-light {
  color: var(--warm);
  border-color: rgba(247, 244, 239, 0.42);
  background: rgba(247, 244, 239, 0.08);
}

.button--light {
  color: var(--navy);
  background: var(--warm);
}

.button--outline-dark {
  color: var(--navy);
  border-color: rgba(10, 38, 71, 0.26);
  background: transparent;
}

.catalogue-stats,
.signal-strip {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  width: min(var(--max), calc(100% - 88px));
  margin: -36px auto 0;
  background: var(--line);
  box-shadow: var(--shadow);
}

.catalogue-stats div,
.signal-strip div {
  min-height: 126px;
  padding: 24px;
  background: var(--warm);
}

.catalogue-stats strong,
.catalogue-stats span {
  display: block;
}

.catalogue-stats strong {
  color: var(--navy);
  font-size: 2.2rem;
  line-height: 1;
}

.catalogue-stats span {
  margin-top: 10px;
  color: var(--slate);
  font-weight: 800;
}

.catalogue-search,
.section,
.contact {
  width: min(var(--max), calc(100% - 88px));
  margin: 0 auto;
  padding: 86px 0;
}

.section--tight {
  padding-top: 48px;
}

.catalogue-search {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: start;
}

.catalogue-search h2,
.section h2,
.contact h2,
.cta-band h2 {
  margin: 0;
  color: var(--navy);
  font-size: 3rem;
  line-height: 1.05;
}

.catalogue-search__form,
.contact-form {
  display: grid;
  gap: 14px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--warm);
  box-shadow: var(--shadow);
}

label {
  display: grid;
  gap: 7px;
  color: var(--navy);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 13px 14px;
  color: var(--charcoal);
  background: #fff;
  text-transform: none;
}

.catalogue-search__status {
  grid-column: 2;
  margin: -22px 0 0;
  color: var(--slate);
  font-weight: 800;
}

.section__header {
  max-width: 860px;
  margin-bottom: 34px;
}

.parts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.part-card,
.term-card,
.faq-list article {
  min-height: 285px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--warm);
  box-shadow: 0 16px 44px rgba(10, 38, 71, 0.06);
}

.part-card a,
.term-card a {
  display: grid;
  height: 100%;
  align-content: start;
  padding: 24px;
}

.part-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.oem-visual {
  display: inline-grid;
  width: 58px;
  height: 58px;
  flex: 0 0 auto;
  place-items: center;
  overflow: hidden;
  border-radius: 50%;
  border: 1px solid rgba(10, 38, 71, 0.12);
  object-fit: cover;
  background: var(--warm);
}

.oem-visual--large {
  width: 150px;
  height: 150px;
}

.oem-visual--badge {
  color: var(--warm);
  background: hsl(var(--badge-hue), 42%, 32%);
  font-weight: 950;
  letter-spacing: 0.03em;
}

.category-pill {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  padding: 8px 10px;
  border-radius: 999px;
  color: hsl(var(--tag-hue), 48%, 23%);
  background: hsl(var(--tag-hue), 58%, 91%);
  font-size: 0.72rem;
  font-weight: 900;
  line-height: 1.1;
  text-transform: uppercase;
}

.part-card h2,
.term-card h2,
.faq-list h3 {
  overflow-wrap: anywhere;
  margin: 0 0 12px;
  color: var(--navy);
  font-size: 1.28rem;
  line-height: 1.18;
}

.part-card p,
.term-card p,
.section__copy p,
.faq-list p,
.contact__content p {
  margin: 0;
  color: var(--slate);
  font-size: 1.02rem;
  line-height: 1.65;
}

.part-card__oem {
  margin-bottom: 14px !important;
  color: var(--navy) !important;
  font-weight: 850;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 38px;
}

.pagination a,
.pagination span,
.pagination button {
  display: inline-flex;
  min-width: 42px;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--navy);
  background: var(--warm);
  font-weight: 900;
  font: inherit;
}

.pagination .is-current {
  color: var(--warm);
  background: var(--navy);
}

.pagination button {
  cursor: pointer;
}

.term-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.term-card {
  min-height: 190px;
}

.term-card span {
  margin-bottom: 18px;
  color: var(--green);
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.part-hero {
  grid-template-columns: 190px 1fr;
  gap: 42px;
  align-items: end;
}

.part-hero__visual {
  align-self: center;
  padding-bottom: 18px;
}

.part-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.part-meta span {
  display: inline-grid;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid rgba(247, 244, 239, 0.18);
  border-radius: 6px;
  color: var(--warm);
  background: rgba(247, 244, 239, 0.08);
}

.part-meta strong {
  color: var(--cyan);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.split {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 70px;
  align-items: start;
}

.section--bordered {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.faq-list article {
  padding: 26px;
}

.cta-band {
  display: flex;
  width: min(var(--max), calc(100% - 88px));
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto 86px;
  padding: 42px;
  color: var(--warm);
  border-radius: 8px;
  background: var(--green);
}

.cta-band h2 {
  color: var(--warm);
}

.contact {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 42px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.form-note {
  margin: 0;
  color: var(--slate);
  font-weight: 800;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 34px;
  padding: 46px 44px;
  border-top: 1px solid var(--line);
  background: var(--warm);
}

.site-footer__brand {
  display: grid;
  gap: 16px;
  max-width: 520px;
}

.site-footer p {
  margin: 0;
  color: var(--slate);
  line-height: 1.6;
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.footer-actions .button {
  min-width: 190px;
  padding-inline: 18px;
}

.footer-nav {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px 22px;
  color: var(--navy);
  font-size: 0.92rem;
  font-weight: 800;
}

@media (max-width: 1120px) {
  .site-nav { gap: 12px; font-size: 0.72rem; }
  .catalogue-hero h1, .part-hero h1 { font-size: 3.8rem; }
  .parts-grid, .term-grid { grid-template-columns: repeat(2, 1fr); }
  .catalogue-search, .split, .contact { grid-template-columns: 1fr; gap: 42px; }
  .catalogue-search__status { grid-column: auto; margin-top: 0; }
}

@media (max-width: 880px) {
  .site-header { min-height: 68px; padding: 12px 20px; }
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed;
    top: 68px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    border: 1px solid rgba(10, 38, 71, 0.12);
    border-radius: 8px;
    background: var(--warm);
    box-shadow: var(--shadow);
  }
  .site-nav.is-open { display: flex; }
  .catalogue-hero, .part-hero, .catalogue-search, .section, .contact, .catalogue-stats, .cta-band { width: calc(100% - 40px); }
  .catalogue-hero, .part-hero { padding-top: 116px; min-height: auto; }
  .catalogue-hero::before, .part-hero::before { inset: 82px -20px 0; }
  .catalogue-hero h1, .part-hero h1 { font-size: 2.7rem; }
  .catalogue-search h2, .section h2, .contact h2, .cta-band h2 { font-size: 2rem; }
  .catalogue-stats { grid-template-columns: 1fr; margin-top: -18px; }
  .parts-grid, .term-grid, .faq-list, .form-grid { grid-template-columns: 1fr; }
  .part-hero { grid-template-columns: 1fr; }
  .part-hero__visual { padding-bottom: 0; }
  .cta-band, .site-footer { display: grid; grid-template-columns: 1fr; padding: 30px 20px; }
  .footer-actions, .footer-nav { grid-column: auto; justify-content: flex-start; }
  .sticky-cta { display: flex; }
}

@media (max-width: 420px) {
  .catalogue-hero h1, .part-hero h1 { font-size: 2.28rem; }
  .button { width: 100%; }
  .hero__actions, .cta-actions { width: 100%; }
  .brand__wordmark { font-size: 0.88rem; }
}