:root {
  --ink: #172028;
  --muted: #66717c;
  --line: #dde4ea;
  --paper: #f5f7f8;
  --white: #ffffff;
  --dark: #10161c;
  --gold: #c48a39;
  --gold-dark: #9d6825;
  --shadow: 0 18px 42px rgba(16, 22, 28, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  width: 100%;
  min-height: 76px;
  padding: 0 5vw;
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}
.site-header.is-scrolled, .site-header.is-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 28px rgba(16, 22, 28, 0.08);
  backdrop-filter: blur(16px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 190px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  color: var(--white);
  background: var(--gold);
  font-weight: 800;
  letter-spacing: 0;
}
.brand strong, .brand small { display: block; }
.brand strong { font-size: 18px; line-height: 1; }
.brand small {
  margin-top: 4px;
  color: currentColor;
  font-size: 11px;
  letter-spacing: 0;
  opacity: 0.78;
  text-transform: uppercase;
}
.main-nav {
  display: flex;
  justify-content: center;
  gap: 30px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}
.main-nav a { position: relative; padding: 28px 0; }
.main-nav a::after {
  position: absolute;
  right: 0;
  bottom: 20px;
  left: 0;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
  content: "";
}
.main-nav a:hover::after { transform: scaleX(1); }
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  color: var(--white);
  background: var(--gold);
  font-weight: 800;
  text-transform: uppercase;
}
.site-header.is-scrolled .header-cta, .site-header.is-open .header-cta { color: var(--white); }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  background: transparent;
}
.nav-toggle span {
  display: block;
  height: 2px;
  margin: 6px 0;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: 700px;
  overflow: hidden;
  color: var(--white);
}
.hero-media, .hero-slide, .hero-overlay { position: absolute; inset: 0; }
.hero-slide {
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 1s ease, transform 5.5s ease;
}
.hero-slide.is-active { opacity: 1; transform: scale(1); }
.hero-overlay {
  background: linear-gradient(90deg, rgba(5, 9, 12, 0.78), rgba(5, 9, 12, 0.38) 50%, rgba(5, 9, 12, 0.2));
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 690px;
  padding: 170px 5vw 190px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--gold);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}
.eyebrow::before {
  width: 30px;
  height: 2px;
  background: currentColor;
  content: "";
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 660px;
  margin-bottom: 20px;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.04;
  letter-spacing: 0;
}
h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 3.4vw, 46px);
  line-height: 1.12;
  letter-spacing: 0;
}
h3 { margin-bottom: 10px; font-size: 21px; line-height: 1.18; }
.hero-content p {
  max-width: 560px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 18px;
}
.hero-actions, .cta-band {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: var(--white); background: var(--gold); }
.btn-primary:hover { background: var(--gold-dark); }
.btn-secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.08);
}
.hero-panel {
  position: absolute;
  right: 5vw;
  bottom: 0;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(600px, 88vw);
  background: var(--white);
  color: var(--ink);
  box-shadow: var(--shadow);
}
.hero-panel div { padding: 24px 24px; border-right: 1px solid var(--line); }
.hero-panel div:last-child { border-right: 0; }
.hero-panel strong {
  display: block;
  color: var(--gold);
  font-size: 32px;
  line-height: 1;
}
.hero-panel span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.category-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--dark);
}
.category-card {
  position: relative;
  min-height: 220px;
  overflow: hidden;
  color: var(--white);
}
.category-card img {
  height: 100%;
  object-fit: cover;
  opacity: 0.68;
  transition: transform 0.45s ease, opacity 0.45s ease;
}
.category-card::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.62));
  content: "";
}
.category-card span {
  position: absolute;
  right: 24px;
  bottom: 24px;
  left: 24px;
  z-index: 1;
  font-size: 21px;
  font-weight: 900;
  line-height: 1.1;
}
.category-card:hover img { opacity: 0.9; transform: scale(1.08); }

.section { padding: 92px 5vw; }
.about, .contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.82fr);
  gap: 64px;
  align-items: center;
}
.section-copy p, .section-heading p, .contact-info p {
  color: var(--muted);
  font-size: 17px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 36px;
  background: var(--line);
}
.feature-grid div { padding: 24px; background: var(--paper); }
.feature-grid strong {
  display: block;
  color: var(--ink);
  font-size: 24px;
}
.feature-grid span { color: var(--muted); font-weight: 700; }
.about-media img {
  height: 560px;
  object-fit: cover;
  box-shadow: var(--shadow);
}
.section-heading { max-width: 640px; margin-bottom: 40px; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(16, 22, 28, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-card img { height: 230px; object-fit: cover; }
.product-card div { padding: 24px; }
.product-card span { color: var(--gold); font-weight: 900; }
.product-card p, .project-card p, .quality-item p, .site-footer p { color: var(--muted); }
.product-card a {
  display: inline-flex;
  margin-top: 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}
.product-card a::after {
  margin-left: 8px;
  content: ">";
}

.split-dark {
  display: grid;
  grid-template-columns: minmax(340px, 0.9fr) minmax(0, 1fr);
  gap: 66px;
  align-items: center;
  color: var(--white);
  background: var(--dark);
}
.split-dark .section-copy p, .split-dark .check-list { color: rgba(255, 255, 255, 0.74); }
.factory-gallery {
  display: grid;
  grid-template-columns: 1fr 0.76fr;
  gap: 20px;
  align-items: end;
}
.factory-gallery img { height: 470px; object-fit: cover; }
.factory-gallery img:nth-child(2) { height: 350px; }
.check-list {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}
.check-list li { position: relative; padding-left: 28px; }
.check-list li::before {
  position: absolute;
  top: 10px;
  left: 0;
  width: 10px;
  height: 10px;
  background: var(--gold);
  content: "";
}

.projects { background: var(--paper); }
.project-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.9fr 0.9fr;
  gap: 24px;
}
.project-card {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  color: var(--white);
}
.project-card img {
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}
.project-card::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.04), rgba(0, 0, 0, 0.72));
  content: "";
}
.project-card div {
  position: absolute;
  right: 30px;
  bottom: 28px;
  left: 30px;
  z-index: 1;
}
.project-card p { color: rgba(255, 255, 255, 0.78); }
.project-card:hover img { transform: scale(1.07); }

.quality {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) 1fr;
  gap: 46px;
  align-items: start;
}
.quality-card {
  position: sticky;
  top: 110px;
  padding: 36px;
  color: var(--white);
  background: var(--dark);
}
.quality-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.quality-item {
  min-height: 205px;
  padding: 30px;
  border: 1px solid var(--line);
  background: var(--white);
}
.quality-item strong { color: var(--gold); }

.cta-band {
  justify-content: space-between;
  margin: 0 5vw;
  padding: 40px;
  color: var(--white);
  background: linear-gradient(120deg, rgba(16, 22, 28, 0.94), rgba(16, 22, 28, 0.72)), url("https://images.unsplash.com/photo-1503387762-592deb58ef4e?auto=format&fit=crop&w=1800&q=80") center/cover;
}
.cta-band h2 { margin-bottom: 0; }
.contact { align-items: start; }
.contact-methods {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}
.contact-methods a, .contact-methods span {
  padding: 16px 18px;
  border-left: 4px solid var(--gold);
  background: var(--paper);
  font-weight: 800;
}
.inquiry-form {
  display: grid;
  gap: 18px;
  padding: 30px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}
.inquiry-form label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}
.inquiry-form input, .inquiry-form select, .inquiry-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 14px 15px;
  color: var(--ink);
  outline: none;
}
.inquiry-form input:focus, .inquiry-form select:focus, .inquiry-form textarea:focus { border-color: var(--gold); }
.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1.45fr repeat(3, 1fr);
  gap: 46px;
  padding: 64px 5vw;
  color: rgba(255, 255, 255, 0.78);
  background: #0b0f13;
}
.site-footer h4 {
  margin: 0 0 18px;
  color: var(--white);
  text-transform: uppercase;
}
.site-footer a { display: block; margin-bottom: 10px; }
.footer-brand { margin-bottom: 18px; color: var(--white); }
.footer-link { color: var(--gold); font-weight: 900; }

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1100px) {
  .site-header {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }
  .nav-toggle { display: block; }
  .main-nav, .header-cta { display: none; }
  .site-header.is-open .main-nav {
    position: absolute;
    top: 76px;
    right: 0;
    left: 0;
    display: grid;
    justify-content: stretch;
    gap: 0;
    padding: 18px 5vw 26px;
    background: var(--white);
    box-shadow: 0 18px 30px rgba(16, 22, 28, 0.1);
  }
  .main-nav a {
    padding: 15px 0;
    border-bottom: 1px solid var(--line);
  }
  .category-strip, .product-grid, .quality-list { grid-template-columns: repeat(2, 1fr); }
  .about, .split-dark, .quality, .contact, .site-footer { grid-template-columns: 1fr; }
  .quality-card { position: static; }
}

@media (max-width: 760px) {
  .site-header {
    min-height: 72px;
    padding: 0 22px;
  }
  .brand { min-width: 0; }
  .brand small { display: none; }
  .hero { min-height: 660px; }
  .hero-content { padding: 122px 22px 220px; }
  h1 { font-size: 38px; }
  .hero-content p { font-size: 16px; }
  .hero-panel {
    right: 22px;
    left: 22px;
    grid-template-columns: 1fr;
    width: auto;
  }
  .hero-panel div {
    padding: 18px 20px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .category-strip, .product-grid, .project-grid, .quality-list, .feature-grid, .factory-gallery {
    grid-template-columns: 1fr;
  }
  .category-card { min-height: 200px; }
  .section { padding: 66px 22px; }
  .about, .split-dark, .contact { gap: 38px; }
  .about-media img, .factory-gallery img, .factory-gallery img:nth-child(2) { height: 340px; }
  .project-card { min-height: 360px; }
  .quality-card, .quality-item, .inquiry-form, .cta-band { padding: 28px; }
  .cta-band { margin: 0 22px; }
  .site-footer { padding: 54px 22px; }
}