/* ============================================
   Tianjin HBIC Group Limited — design system
   ============================================ */

:root {
  /* Logo-led palette: black, white, subtle gray + orange accent */
  --color-ink: #0a0a0a;
  --color-ink-soft: #1c1c1c;
  --color-steel: #1c1c1c;
  --color-steel-dark: #0a0a0a;
  --color-iron: #4a4a4a;
  --color-accent: #e67e22;
  --color-accent-hover: #cf6f1a;
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-text: #0a0a0a;
  --color-text-muted: #5c5c5c;
  --color-border: #e5e5e5;
  --color-bg-alt: #f6f6f6;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
  --radius: 10px;
  --radius-sm: 6px;
  --header-height: 84px;
  --transition: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
}

/* Subtle vertical guide — modern grid line */
.page-wrap {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-wrap::before {
  content: "";
  position: fixed;
  top: 0;
  left: max(0px, calc(50% - min(560px, 50vw - 1.5rem)));
  width: 1px;
  height: 100vh;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(0, 0, 0, 0.06) 15%,
    rgba(0, 0, 0, 0.06) 85%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 0;
}

@media (max-width: 768px) {
  .page-wrap::before {
    display: none;
  }
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-steel);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent);
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  margin-top: 0;
  color: var(--color-steel-dark);
}

p {
  margin-top: 0;
}

.container {
  width: min(920px, 100% - 3rem);
  margin-inline: auto;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  padding: 0.75rem 1rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header & nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  /* Ensures absolutely-positioned mobile nav anchors to this element */
  isolation: isolate;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 72px, transparent 72px);
  pointer-events: none;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-height);
  flex-wrap: wrap;
}

@media (min-width: 900px) {
  .header-inner {
    flex-wrap: nowrap;
  }
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-steel);
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--color-steel);
}

.logo--img {
  gap: 0;
  line-height: 0;
}

.logo-img {
  height: 58px;
  width: auto;
  max-width: min(280px, 52vw);
  object-fit: contain;
  display: block;
}

@media (min-width: 900px) {
  .logo-img {
    height: 72px;
    max-width: 320px;
  }
}

.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-steel), var(--color-steel-dark));
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-steel);
  margin-inline: auto;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
}


.site-nav {
  display: none;
  width: 100%;
  order: 3;
}

.site-nav.is-open {
  display: block;
  padding-bottom: 1rem;
}

@media (min-width: 900px) {
  .site-nav {
    display: block;
    width: auto;
    order: 0;
    padding-bottom: 0;
  }
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

@media (min-width: 900px) {
  .site-nav ul {
    flex-direction: row;
    align-items: center;
    gap: 0.15rem;
  }
}

.site-nav a {
  display: block;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--color-iron);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--color-steel);
  background: var(--color-bg);
}

.site-nav a.is-active {
  color: var(--color-accent);
  background: rgba(230, 126, 34, 0.08);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.35rem;
  font: inherit;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition),
    transform 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border-color: var(--color-ink);
  color: var(--color-ink);
}

.btn-outline:hover {
  background: var(--color-ink);
  color: #fff;
  border-color: var(--color-ink);
}

.btn-ghost {
  background: transparent;
  color: var(--color-steel);
}

.btn-ghost:hover {
  background: var(--color-bg);
}

/* Hero */
.hero {
  position: relative;
  min-height: min(82vh, 680px);
  display: flex;
  align-items: center;
  padding: clamp(3rem, 8vw, 5rem) 0;
  background: var(--color-ink);
  color: #fff;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: #fff;
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 1.25rem;
  max-width: 20ch;
}

.hero p {
  font-size: 1.125rem;
  opacity: 0.92;
  max-width: 38ch;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero .btn-primary {
  box-shadow: 0 4px 24px rgba(230, 126, 34, 0.4);
}

.hero .btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

.hero .btn-outline:hover {
  background: #fff;
  color: var(--color-ink);
  border-color: #fff;
}

/* Home hero: full-bleed photo, light overlay so the image stays visible */
.hero--home {
  background-color: #0a0a0a;
  background-image: url("../assets/images/hero-home.png");
  background-size: cover;
  background-position: center;
  text-align: center;
  justify-content: center;
}

.hero--home::before {
  background: linear-gradient(
      180deg,
      rgba(0, 0, 0, 0.35) 0%,
      rgba(0, 0, 0, 0.28) 45%,
      rgba(0, 0, 0, 0.45) 100%
    ),
    linear-gradient(90deg, rgba(230, 126, 34, 0.12) 0%, transparent 35%);
}

.hero--home .container {
  max-width: 40rem;
}

.hero--home h1 {
  margin-left: auto;
  margin-right: auto;
  max-width: none;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.45);
}

.hero--home .hero-actions {
  justify-content: center;
}

.hero--home::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent) 30%, var(--color-accent) 70%, transparent);
  z-index: 1;
  pointer-events: none;
}

/* Sections */
.section {
  padding: clamp(4.5rem, 11vw, 7.5rem) 0;
}

.section-header {
  text-align: center;
  max-width: 36rem;
  margin: 0 auto 3.5rem;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 0.5rem;
}

.section-header p {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.7;
}

.section-alt {
  background: var(--color-bg-alt);
}

/* Cards grid */
.grid-3 {
  display: grid;
  gap: 2.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.grid-4 {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.06);
  color: var(--color-steel);
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Product cards */
.product-card {
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.product-thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(145deg, #e2e8f0, #cbd5e0);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  display: grid;
  place-items: center;
  color: var(--color-steel);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.product-card .specs {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.product-card .btn {
  width: 100%;
}

.products-grid {
  display: grid;
  gap: 2.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card.is-hidden {
  display: none;
}

/* Products page: tabbed Steel / Machine + image cards */
.section-products-tabs {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
}

.product-tabs {
  display: flex;
  justify-content: center;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.product-tab {
  min-width: 148px;
  padding: 0.8rem 2.25rem;
  font: inherit;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 2px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-iron);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition),
    box-shadow var(--transition);
}

.product-tab:hover {
  border-color: var(--color-steel);
  color: var(--color-steel);
}

.product-tab.is-active {
  background: var(--color-steel);
  border-color: var(--color-steel);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.product-tab.is-active:hover {
  color: #fff;
  border-color: var(--color-steel-dark);
  background: var(--color-steel-dark);
}

.product-panel:not(.is-active) {
  display: none;
}

.product-panel.is-active {
  display: block;
}

.machine-panel-mount {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.machine-family {
  margin-bottom: clamp(2.5rem, 6vw, 3.75rem);
}

.machine-family:last-child {
  margin-bottom: 0;
}

.machine-family-title {
  margin: 0 0 1.5rem;
  font-size: clamp(1.35rem, 2.8vw, 1.75rem);
  font-weight: 800;
  color: var(--color-steel-dark);
  letter-spacing: -0.03em;
  line-height: 1.25;
  padding-bottom: 0.65rem;
  border-bottom: 2px solid var(--color-border);
}

.machine-family .machine-subgroup {
  margin-bottom: 1.75rem;
}

.machine-family .machine-subgroup:last-child {
  margin-bottom: 0;
}

.machine-subgroup {
  margin-bottom: clamp(2.25rem, 5vw, 3.25rem);
}

.machine-subgroup:last-child {
  margin-bottom: 0;
}

.machine-subgroup-title {
  margin: 0 0 1.35rem;
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  font-weight: 800;
  color: var(--color-steel-dark);
  letter-spacing: -0.02em;
  padding-left: 0.85rem;
  border-left: 4px solid var(--color-accent);
  line-height: 1.3;
}

.products-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 520px) {
  .products-card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .products-card-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
  }
}

.product-card-tile {
  scroll-margin-top: calc(var(--header-height) + 16px);
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition), transform 0.2s ease, border-color var(--transition);
}

.product-card-tile:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(0, 0, 0, 0.1);
}

.product-card-tile__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: linear-gradient(145deg, #e2e8f0, #cbd5e1);
}

.product-card-tile__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-card-tile__name {
  display: block;
  padding: 1rem 1.15rem 1.15rem;
  font-weight: 700;
  font-size: 0.94rem;
  line-height: 1.4;
  color: var(--color-steel-dark);
}

.product-card-tile:hover .product-card-tile__name {
  color: var(--color-accent);
}

/* Product detail page (product.html) */
.product-detail-page {
  padding: 1.5rem 0 3.5rem;
  max-width: 56rem;
}

.product-detail-breadcrumb {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.product-detail-breadcrumb a {
  color: var(--color-steel);
  text-decoration: none;
  font-weight: 500;
}

.product-detail-breadcrumb a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.product-detail-breadcrumb__sep {
  margin: 0 0.35rem;
  opacity: 0.6;
}

.product-detail-title {
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-steel-dark);
  margin: 0 0 1.5rem;
  line-height: 1.2;
}

.product-detail-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
  .product-detail-gallery {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

.product-detail-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: linear-gradient(145deg, #e2e8f0, #cbd5e1);
  aspect-ratio: 4 / 3;
}

.product-detail-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-detail-brief {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-iron);
  margin: 0 0 1.75rem;
  max-width: 42rem;
}

.product-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.product-detail-error {
  padding: 2rem 0;
}

.product-detail-error__title {
  font-size: 1.5rem;
  margin: 0 0 0.75rem;
  color: var(--color-steel-dark);
}

.product-detail-error p {
  color: var(--color-text-muted);
  margin: 0 0 1rem;
  max-width: 36rem;
  line-height: 1.55;
}

/* Home + legacy: Steel (wide strips) vs Machine (pill grid) */
.products-division-title {
  font-size: clamp(1.85rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin: 0 0 2rem;
  color: var(--color-steel-dark);
  letter-spacing: -0.03em;
}

.products-division-title--machine {
  color: var(--color-steel);
}

.products-name-grid--steel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
}

@media (min-width: 540px) {
  .products-name-grid--steel {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem 1rem;
  }
}

@media (min-width: 900px) {
  .products-name-grid--steel {
    grid-template-columns: repeat(3, 1fr);
  }
}

.products-name-grid--machine {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

@media (min-width: 480px) {
  .products-name-grid--machine {
    grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  }
}

.product-name-tile {
  scroll-margin-top: calc(var(--header-height) + 12px);
  display: flex;
  align-items: center;
  min-height: 3.1rem;
  padding: 0.9rem 1.15rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-steel-dark);
  font-weight: 600;
  font-size: 0.92rem;
  line-height: 1.35;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition),
    box-shadow var(--transition);
}

.product-name-tile:hover {
  background: #f8fafc;
  border-left-color: var(--color-steel);
  color: var(--color-steel-dark);
  box-shadow: var(--shadow-sm);
}

.products-name-grid--machine .product-name-tile {
  border-left-width: 1px;
  border-radius: 999px;
  justify-content: center;
  text-align: center;
  min-height: auto;
  padding: 0.65rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  background: linear-gradient(165deg, #ffffff 0%, #f1f5f9 100%);
}

.products-name-grid--machine .product-name-tile:hover {
  border-color: var(--color-accent);
  background: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

/* Home: two columns Steel / Machine */
.home-product-split {
  display: grid;
  gap: 2.75rem;
}

@media (min-width: 800px) {
  .home-product-split {
    grid-template-columns: 1fr 1fr;
    gap: 3rem 3.5rem;
    align-items: start;
  }
}

.home-product-column .products-name-grid--steel,
.home-product-column .products-name-grid--machine {
  grid-template-columns: 1fr;
}

@media (min-width: 480px) {
  .home-product-column .products-name-grid--machine {
    grid-template-columns: repeat(2, 1fr);
  }
}

.home-division-label {
  margin: 0 0 1.1rem;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-steel-dark);
}

.home-division-label a {
  color: inherit;
  text-decoration: none;
  border-bottom: 3px solid var(--color-accent);
  padding-bottom: 0.15rem;
}

.home-division-label a:hover {
  color: var(--color-accent);
}

.home-products-cta {
  text-align: center;
  margin: 2.75rem 0 0;
}

/* About page */
.prose {
  max-width: 38rem;
  margin-inline: auto;
}

.prose p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
  line-height: 1.8;
}

.prose h2 {
  margin-bottom: 1.25rem;
  font-size: 1.65rem;
}

.about-closing {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.85;
  color: var(--color-text-muted);
}

.mission-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.team-card {
  text-align: center;
}

.team-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--color-steel), var(--color-iron));
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.25rem;
}

.team-card .role {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.logo-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: center;
}

.logo-strip span {
  padding: 0.65rem 1.25rem;
  background: var(--color-bg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

/* Contact */
.contact-layout {
  display: grid;
  gap: 3rem;
}

@media (min-width: 900px) {
  .contact-layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.form-group {
  margin-bottom: 1.1rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  color: var(--color-steel-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
  background: var(--color-surface);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-group .error-msg {
  display: none;
  font-size: 0.8rem;
  color: #c53030;
  margin-top: 0.25rem;
}

.form-group.has-error input,
.form-group.has-error textarea,
.form-group.has-error select {
  border-color: #c53030;
}

.form-group.has-error .error-msg {
  display: block;
}

.contact-info-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.contact-info-block h3 {
  margin-bottom: 1rem;
}

.contact-info-block dl {
  margin: 0;
}

.contact-info-block dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-top: 1rem;
}

.contact-info-block dt:first-child {
  margin-top: 0;
}

.contact-info-block dd {
  margin: 0.25rem 0 0;
  font-weight: 500;
}

.map-embed {
  margin-top: 2rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  min-height: 280px;
  background: var(--color-border);
}

.map-embed iframe {
  width: 100%;
  height: 280px;
  border: 0;
  display: block;
}

/* Footer */
.site-footer {
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.85);
  padding: clamp(3.5rem, 8vw, 5rem) 0 2rem;
  margin-top: auto;
  border-top: 2px solid var(--color-accent);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.9);
}

.site-footer a:hover {
  color: var(--color-accent);
}

.footer-restyle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  text-align: center;
  max-width: 36rem;
  margin: 0 auto;
}

.footer-nav-inline {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 2rem;
  order: 1;
}

.footer-nav-inline a {
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.95);
}

.footer-nav-inline a:hover {
  color: var(--color-accent);
}

.footer-contact-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.35rem 0.75rem;
  font-size: 0.92rem;
  line-height: 1.5;
  order: 2;
}

.footer-dot {
  opacity: 0.35;
  user-select: none;
}

.footer-brand-block {
  order: 3;
  padding-top: 0.25rem;
}

.footer-brand-name {
  margin: 0 0 0.5rem;
  font-weight: 800;
  font-size: 1.12rem;
  color: #fff;
}

.site-footer .footer-brand-text {
  margin: 0;
  max-width: 32ch;
  margin-inline: auto;
  line-height: 1.75;
  opacity: 0.88;
}

.footer-brand-text {
  margin-top: 1.25rem;
  max-width: 34ch;
  line-height: 1.75;
  opacity: 0.88;
}

.footer-legal {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer-legal .footer-logo-legal {
  height: 64px;
  width: auto;
  max-width: min(260px, 78vw);
  object-fit: contain;
  display: block;
  background: #fff;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
}

.footer-copyright {
  margin: 0;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.78);
}

/* Page hero (inner pages) */
.page-hero {
  position: relative;
  background: var(--color-ink);
  color: #fff;
  padding: clamp(3rem, 8vw, 4.5rem) 0 clamp(2.5rem, 6vw, 3.5rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), transparent 55%);
  opacity: 0.85;
}

.page-hero .container {
  position: relative;
}

.page-hero h1 {
  color: #fff;
  margin-bottom: 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
}

.page-hero p {
  margin: 0;
  opacity: 0.88;
  max-width: 42ch;
  line-height: 1.75;
}

.page-wrap main {
  flex: 1;
  position: relative;
  z-index: 1;
}

/* Photo mosaic — about & contact */
.photo-mosaic {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(2, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 720px) {
  .photo-mosaic {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.85rem;
  }
}

.photo-mosaic li {
  margin: 0;
  padding: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.photo-mosaic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.photo-mosaic li:hover img {
  transform: scale(1.04);
}

.photo-mosaic--about {
  margin-top: 2.25rem;
}

.photo-mosaic--contact {
  margin-bottom: 2.25rem;
}

.photo-strip-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  font-weight: 600;
  margin: 0 0 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.photo-strip-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-border), transparent);
  max-width: 180px;
}

/* Mission — editorial layout */
.mission-section {
  position: relative;
}

.mission-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100% - 3rem, 920px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border) 20%, var(--color-border) 80%, transparent);
}

.mission-layout {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

@media (min-width: 880px) {
  .mission-layout {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.2fr);
    gap: 3rem;
  }
}

.mission-intro {
  position: relative;
  padding-left: 1.15rem;
  border-left: 3px solid var(--color-accent);
}

.mission-kicker {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.65rem;
}

.mission-intro h2 {
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  margin: 0 0 0.75rem;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--color-text);
}

.mission-intro > p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 38ch;
}

.mission-panels {
  display: grid;
  gap: 1rem;
}

@media (min-width: 520px) {
  .mission-panels {
    grid-template-columns: repeat(2, 1fr);
  }
}

.mission-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1.35rem 1.5rem 1.4rem;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.mission-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.mission-panel:hover {
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: var(--shadow-md);
}

.mission-panel:hover::before {
  opacity: 1;
}

.mission-panel__num {
  font-size: 2rem;
  font-weight: 800;
  color: rgba(0, 0, 0, 0.07);
  line-height: 1;
  margin-bottom: 0.35rem;
  letter-spacing: -0.04em;
}

.mission-panel h3 {
  font-size: 0.98rem;
  margin: 0 0 0.5rem;
  color: var(--color-text);
  font-weight: 700;
}

.mission-panel p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* About + Contact: one shared background image, very subtle */
body.page-atmosphere {
  background-color: var(--color-bg);
}

body.page-atmosphere::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image: url("../assets/images/page-atmosphere-bg.png");
  background-size: cover;
  background-position: center;
  opacity: 0.07;
  pointer-events: none;
}

body.page-atmosphere .page-wrap {
  position: relative;
  z-index: 1;
}

body.page-atmosphere .site-header {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
}

body.page-atmosphere .section:not(.page-hero) {
  background-color: rgba(255, 255, 255, 0.93);
}

body.page-atmosphere .section-alt {
  background-color: rgba(246, 246, 246, 0.93);
}

body.page-atmosphere .card {
  background-color: rgba(255, 255, 255, 0.97);
}

body.page-atmosphere .contact-info-block {
  background-color: rgba(255, 255, 255, 0.97);
}

body.page-atmosphere .page-hero {
  background: var(--color-ink);
}

body.page-atmosphere .site-footer {
  position: relative;
  z-index: 1;
}

/* Anchor offset */
[id] {
  scroll-margin-top: calc(var(--header-height) + 12px);
}

/* ============================================================
   Mobile-first responsive enhancements
   ============================================================ */

/* ── Header ── */
@media (max-width: 899px) {
  :root {
    --header-height: 68px;
  }

  .header-inner {
    flex-wrap: nowrap;
    gap: 0;
    padding: 0;
    min-height: var(--header-height);
    justify-content: space-between;
  }

  .logo-img {
    height: 46px;
    max-width: min(200px, 60vw);
  }

  .site-nav {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    z-index: 999;
    box-shadow: var(--shadow-md);
    padding: 0.5rem 0 1rem;
    display: none;
    width: 100%;
    order: unset;
  }

  .site-nav.is-open {
    display: block;
    padding-bottom: 1rem;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 0 1rem;
  }

  .site-nav a {
    padding: 0.85rem 1rem;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    display: block;
  }
}

/* ── Container: tighter gutters on very small screens ── */
@media (max-width: 480px) {
  .container {
    width: min(920px, 100% - 2rem);
  }
}

/* ── Hero ── */
@media (max-width: 640px) {
  .hero {
    min-height: min(65vh, 460px);
    padding: clamp(2.5rem, 7vw, 4rem) 0;
  }

  .hero h1 {
    font-size: clamp(1.65rem, 7vw, 2.5rem);
    margin-bottom: 1rem;
  }

  .hero p {
    font-size: 1rem;
    margin-bottom: 1.75rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 320px;
    justify-content: center;
    padding: 0.85rem 1.5rem;
    font-size: 1rem;
  }
}

/* ── Page hero (inner pages) ── */
@media (max-width: 640px) {
  .page-hero h1 {
    font-size: clamp(1.5rem, 6vw, 2rem);
  }

  .page-hero p {
    font-size: 0.95rem;
    max-width: 100%;
  }
}

/* ── Sections ── */
@media (max-width: 640px) {
  .section {
    padding: clamp(3rem, 8vw, 5rem) 0;
  }

  .section-header {
    margin-bottom: 2.5rem;
  }
}

/* ── Product tabs ── */
@media (max-width: 480px) {
  .product-tab {
    flex: 1;
    min-width: 0;
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
  }

  .product-tabs {
    gap: 0.5rem;
  }
}

/* ── Product card tiles ── */
@media (max-width: 399px) {
  .products-card-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Product detail ── */
@media (max-width: 640px) {
  .product-detail-page {
    padding: 1rem 0 2.5rem;
  }

  .product-detail-title {
    font-size: clamp(1.35rem, 5.5vw, 1.75rem);
  }

  .product-detail-actions {
    flex-direction: column;
  }

  .product-detail-actions .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}

/* ── Contact page ── */
@media (max-width: 899px) {
  .contact-layout {
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .contact-layout {
    gap: 1.75rem;
  }

  .contact-info-block {
    padding: 1.25rem;
  }

  #contact-form {
    padding: 1.25rem;
  }
}

/* ── Form elements: ensure full-width touch targets ── */
.form-group input,
.form-group textarea,
.form-group select {
  font-size: 1rem; /* prevents iOS zoom on focus */
  -webkit-appearance: none;
}

/* ── Map embed: fully responsive ── */
.map-embed {
  min-height: 0;
}

.map-embed iframe {
  width: 100%;
  height: clamp(220px, 50vw, 380px);
}

/* ── Footer: mobile stacking ── */
@media (max-width: 480px) {
  .footer-contact-row {
    flex-direction: column;
    gap: 0.25rem;
    text-align: center;
  }

  .footer-dot {
    display: none;
  }

  .footer-nav-inline {
    gap: 0.4rem 1.5rem;
  }
}

/* ── Mission panels: single column on xs ── */
@media (max-width: 399px) {
  .mission-panels {
    grid-template-columns: 1fr;
  }
}

/* ── Buttons: comfortable touch targets on mobile ── */
@media (max-width: 640px) {
  .btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
  }
}

/* ── About closing: better line length on small screens ── */
@media (max-width: 640px) {
  .about-closing {
    font-size: 1rem;
    line-height: 1.7;
  }
}

/* ── Machine family titles: better sizing on mobile ── */
@media (max-width: 480px) {
  .machine-family-title {
    font-size: clamp(1.1rem, 5vw, 1.5rem);
  }

  .machine-subgroup-title {
    font-size: clamp(1rem, 4.5vw, 1.2rem);
    padding-left: 0.65rem;
  }
}

/* ── Grid 4 fallback for smallest screens ── */
@media (max-width: 360px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }
}