/* ==========================================================================
   Metal Engineering & Trading Corporation — main.css
   Modern industrial design system
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand colors - drawn from the logo's deep navy + silver */
  --c-navy-900: #0a1f3d;
  --c-navy-800: #0f2a52;
  --c-navy-700: #143a6e;
  --c-navy-600: #1a4a8c;
  --c-blue-500: #1e5bb8;
  --c-blue-400: #3577d4;
  --c-blue-100: #e3edfa;
  --c-silver-100: #f5f7fa;
  --c-silver-200: #e5eaf0;
  --c-silver-300: #cbd3df;
  --c-silver-500: #8895a7;
  --c-silver-700: #4a5568;
  --c-silver-900: #1a202c;
  --c-success: #16a34a;
  --c-whatsapp: #25d366;
  --c-whatsapp-dark: #128c7e;
  --c-danger: #dc2626;
  --c-warning: #d97706;

  /* Spacing scale */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.25rem;
  --s-6: 1.5rem;
  --s-8: 2rem;
  --s-10: 2.5rem;
  --s-12: 3rem;
  --s-16: 4rem;
  --s-20: 5rem;
  --s-24: 6rem;
  --s-32: 8rem;

  /* Type */
  --f-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
  --f-display: 'Inter', 'Segoe UI', system-ui, sans-serif;

  /* Radii & shadows */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 20px;
  --r-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(10, 31, 61, 0.06), 0 1px 3px rgba(10, 31, 61, 0.04);
  --shadow-md: 0 4px 12px rgba(10, 31, 61, 0.08), 0 2px 4px rgba(10, 31, 61, 0.04);
  --shadow-lg: 0 12px 32px rgba(10, 31, 61, 0.12), 0 4px 8px rgba(10, 31, 61, 0.06);
  --shadow-xl: 0 24px 56px rgba(10, 31, 61, 0.18);

  /* Layout */
  --container: 1200px;
  --header-h: 76px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 150ms;
  --t-base: 250ms;
  --t-slow: 400ms;
}

/* --------------------------------------------------------------------------
   2. Reset + base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-silver-900);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, picture, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--c-blue-500);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}
a:hover { color: var(--c-navy-700); }
a:focus-visible {
  outline: 3px solid var(--c-blue-400);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--f-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-navy-900);
  margin: 0 0 var(--s-4) 0;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4vw + 1rem, 3.25rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 2.4vw + 0.8rem, 2.25rem); }
h3 { font-size: clamp(1.25rem, 1.2vw + 0.8rem, 1.5rem); }
h4 { font-size: 1.125rem; }

p { margin: 0 0 var(--s-4) 0; }
ul, ol { margin: 0 0 var(--s-4) 0; padding-left: 1.4em; }
li { margin-bottom: var(--s-2); }

hr {
  border: 0;
  border-top: 1px solid var(--c-silver-200);
  margin: var(--s-12) 0;
}

::selection {
  background: var(--c-blue-500);
  color: #fff;
}

/* --------------------------------------------------------------------------
   3. Layout primitives
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--s-6);
}

.section {
  padding: var(--s-20) 0;
}
.section--tight { padding: var(--s-12) 0; }
.section--dark {
  background: linear-gradient(180deg, var(--c-navy-900), var(--c-navy-800));
  color: #e6edf7;
}
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 { color: #fff; }
.section--alt { background: var(--c-silver-100); }

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-blue-500);
  margin-bottom: var(--s-3);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--s-12);
}
.section-head p {
  font-size: 1.0625rem;
  color: var(--c-silver-700);
  margin: 0;
}

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border: 1.5px solid transparent;
  border-radius: var(--r-md);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t-base) var(--ease);
  white-space: nowrap;
  user-select: none;
}
.btn:focus-visible {
  outline: 3px solid var(--c-blue-400);
  outline-offset: 2px;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn--primary {
  background: var(--c-blue-500);
  color: #fff;
  border-color: var(--c-blue-500);
}
.btn--primary:hover {
  background: var(--c-navy-700);
  border-color: var(--c-navy-700);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background: #fff;
  color: var(--c-navy-900);
  border-color: var(--c-silver-300);
}
.btn--secondary:hover {
  border-color: var(--c-navy-700);
  color: var(--c-navy-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background: transparent;
  color: var(--c-navy-900);
  border-color: transparent;
}
.btn--ghost:hover { color: var(--c-blue-500); }

.btn--whatsapp {
  background: var(--c-whatsapp);
  color: #fff;
  border-color: var(--c-whatsapp);
}
.btn--whatsapp:hover {
  background: var(--c-whatsapp-dark);
  border-color: var(--c-whatsapp-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--lg { padding: 1rem 1.875rem; font-size: 1rem; }
.btn--sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn--block { width: 100%; }

/* --------------------------------------------------------------------------
   5. Top utility bar
   -------------------------------------------------------------------------- */
.topbar {
  background: var(--c-navy-900);
  color: #c8d4e3;
  font-size: 0.8125rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-3);
}
.topbar a { color: #c8d4e3; }
.topbar a:hover { color: #fff; }
.topbar__contact {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  flex-wrap: wrap;
}
.topbar__contact span {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}
.topbar__contact svg { width: 14px; height: 14px; opacity: 0.8; }

@media (max-width: 720px) {
  .topbar { display: none; }
  .topbar__contact { gap: var(--s-3); }
}

/* --------------------------------------------------------------------------
   6. Header + navigation
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-silver-200);
  transition: box-shadow var(--t-base) var(--ease);
}
.header.is-scrolled { box-shadow: var(--shadow-md); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: var(--s-6);
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}
.header__brand img {
  height: 70px;
  width: auto;
}
.header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.header__brand-text strong {
  font-size: 0.95rem;
  color: var(--c-navy-900);
  font-weight: 800;
  letter-spacing: -0.01em;
}
.header__brand-text small {
  font-size: 0.7rem;
  color: var(--c-silver-500);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Desktop nav */
.nav {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  margin-left: auto;
  margin-right: var(--s-4);
}
.nav__item {
  position: relative;
}
.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.5rem 0.85rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--c-silver-900);
  border-radius: var(--r-md);
  transition: all var(--t-fast) var(--ease);
  text-decoration: none;
  white-space: nowrap;
}
.nav__link:hover { color: var(--c-blue-500); background: var(--c-blue-100); }
.nav__link.is-active {
  color: var(--c-blue-500);
  background: var(--c-blue-100);
  font-weight: 600;
}
.nav__link svg.chev { width: 14px; height: 14px; opacity: 0.7; transition: transform var(--t-fast) var(--ease); }
.nav__item:hover .nav__link svg.chev { transform: rotate(180deg); }

/* Dropdown */
.nav__dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 280px;
  background: #fff;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--s-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all var(--t-base) var(--ease-out);
  z-index: 60;
}
.nav__item:hover .nav__dropdown,
.nav__item:focus-within .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav__dropdown a {
  display: block;
  padding: 0.55rem 0.75rem;
  font-size: 0.9rem;
  color: var(--c-silver-900);
  border-radius: var(--r-sm);
  text-decoration: none;
}
.nav__dropdown a:hover { background: var(--c-blue-100); color: var(--c-blue-500); }
.nav__dropdown a small { display: block; color: var(--c-silver-500); font-size: 0.75rem; }

/* Header CTA */
.header__cta {
  display: flex;
  align-items: center;
  gap: var(--s-2);
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-md);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  color: var(--c-navy-900);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: background var(--t-fast) var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform var(--t-base) var(--ease), top var(--t-base) var(--ease);
}
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after  { top:  7px; }
.nav-toggle.is-open span { background: transparent; }
.nav-toggle.is-open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.is-open span::after  { top: 0; transform: rotate(-45deg); }

/* Mobile nav drawer */
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .header__cta .btn:not(.btn--whatsapp) { display: none; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    margin: 0;
    padding: var(--s-4);
    border-bottom: 1px solid var(--c-silver-200);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--t-base) var(--ease-out);
  }
  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav__item { width: 100%; }
  .nav__link {
    width: 100%;
    padding: 0.85rem 1rem;
    font-size: 1rem;
    justify-content: space-between;
    border-bottom: 1px solid var(--c-silver-100);
    border-radius: 0;
  }
  .nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding: 0 0 var(--s-3) 0;
    background: var(--c-silver-100);
    display: none;
  }
  .nav__item.is-open .nav__dropdown { display: block; }
  .nav__dropdown a { padding-left: 1.5rem; }
  .nav__link svg.chev { display: none; }
  /* Show toggle in mobile via .nav-toggle */
}

/* --------------------------------------------------------------------------
   7. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  background: var(--c-navy-900);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}
.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(10,31,61,0.92) 0%, rgba(10,31,61,0.65) 50%, rgba(20,58,110,0.6) 100%);
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--s-12);
  align-items: center;
  padding: var(--s-16) 0;
}
.hero__content h1 {
  color: #fff;
  margin-bottom: var(--s-5);
}
.hero__lead {
  font-size: 1.125rem;
  color: #c8d4e3;
  margin-bottom: var(--s-8);
  max-width: 56ch;
}
.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-bottom: var(--s-8);
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.4rem 0.85rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--r-full);
  font-size: 0.8125rem;
  color: #d8e3f0;
}
.hero__badge svg { width: 14px; height: 14px; color: var(--c-blue-400); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); }

.hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--r-lg);
  padding: var(--s-6);
  backdrop-filter: blur(8px);
}
.hero__stat {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
}
.hero__stat-num {
  font-size: 2.25rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.02em;
}
.hero__stat-label {
  font-size: 0.8125rem;
  color: #97a8c0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

@media (max-width: 860px) {
  .hero__inner {
    grid-template-columns: 1fr;
    padding: var(--s-12) 0 var(--s-10);
  }
  .hero__stats { grid-template-columns: 1fr 1fr; }
}

/* Page hero (smaller, used for subpages) */
.page-hero {
  background: linear-gradient(135deg, var(--c-navy-900) 0%, var(--c-navy-700) 100%);
  color: #fff;
  padding: var(--s-10) 0 var(--s-8);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 20%, rgba(53, 119, 212, 0.18), transparent 50%),
                    radial-gradient(circle at 80% 80%, rgba(53, 119, 212, 0.12), transparent 50%);
  z-index: 0;
}
.page-hero__inner { position: relative; z-index: 1; }
.page-hero h1 { color: #fff; }
.page-hero__lead { color: #c8d4e3; max-width: 60ch; font-size: 1.0625rem; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
  font-size: 0.8125rem;
  color: #97a8c0;
  margin-bottom: var(--s-4);
}
.breadcrumb a { color: #c8d4e3; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { opacity: 0.5; }

/* --------------------------------------------------------------------------
   8. Cards & grids
   -------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--s-6);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.card {
  background: #fff;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-lg);
  padding: var(--s-6);
  transition: all var(--t-base) var(--ease);
  display: flex;
  flex-direction: column;
}
.card:hover {
  border-color: var(--c-blue-400);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-blue-100);
  color: var(--c-blue-500);
  border-radius: var(--r-md);
  margin-bottom: var(--s-4);
  flex-shrink: 0;
}
.card__icon svg { width: 24px; height: 24px; }
.card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-navy-900);
  margin-bottom: var(--s-2);
}
.card__body { color: var(--c-silver-700); flex: 1; margin-bottom: var(--s-4); }
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--c-blue-500);
}
.card__link::after {
  content: "→";
  transition: transform var(--t-fast) var(--ease);
}
.card:hover .card__link::after { transform: translateX(3px); }

/* Product card - image-forward */
.product-card {
  background: #fff;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--t-base) var(--ease);
  text-decoration: none;
  color: inherit;
}
.product-card:hover {
  border-color: var(--c-blue-400);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  color: inherit;
}
.product-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--c-silver-100), var(--c-silver-200));
  overflow: hidden;
}
.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow) var(--ease);
}
.product-card:hover .product-card__media img { transform: scale(1.05); }
.product-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(10, 31, 61, 0.4));
  pointer-events: none;
}
.product-card__media-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-silver-500);
}
.product-card__body {
  padding: var(--s-5);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.product-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--c-navy-900);
  margin-bottom: var(--s-2);
}
.product-card__desc {
  font-size: 0.9rem;
  color: var(--c-silver-700);
  margin: 0 0 var(--s-4) 0;
  flex: 1;
}
.product-card__cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-blue-500);
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
}
.product-card:hover .product-card__cta { color: var(--c-navy-700); }

/* Industry card */
.industry-card {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-4);
  background: #fff;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-md);
  transition: all var(--t-base) var(--ease);
}
.industry-card:hover {
  border-color: var(--c-blue-400);
  transform: translateX(4px);
}
.industry-card__icon {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-blue-500);
  background: var(--c-blue-100);
  border-radius: var(--r-sm);
  flex-shrink: 0;
}
.industry-card__icon svg { width: 20px; height: 20px; }
.industry-card__name { font-weight: 600; color: var(--c-navy-900); font-size: 0.9375rem; }

/* --------------------------------------------------------------------------
   9. Tables (for technical pages)
   -------------------------------------------------------------------------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-md);
  background: #fff;
  margin: var(--s-6) 0;
}
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  white-space: nowrap;
}
table.data caption {
  caption-side: top;
  text-align: left;
  padding: var(--s-3) var(--s-4);
  background: var(--c-navy-900);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
table.data th,
table.data td {
  padding: 0.6rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--c-silver-200);
}
table.data thead th {
  background: var(--c-silver-100);
  font-weight: 700;
  color: var(--c-navy-900);
  position: sticky;
  top: 0;
}
table.data tbody tr:nth-child(even) { background: var(--c-silver-100); }
table.data tbody tr:hover { background: var(--c-blue-100); }
table.data td.center, table.data th.center { text-align: center; }

/* --------------------------------------------------------------------------
   10. Product detail layout
   -------------------------------------------------------------------------- */
.product-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: var(--s-12);
  margin: var(--s-8) 0;
}
@media (max-width: 900px) {
  .product-detail { grid-template-columns: 1fr; }
}
.product-detail__main h2 { margin-top: var(--s-6); }
.product-detail__main p { font-size: 1.0625rem; line-height: 1.7; color: var(--c-silver-700); }
.product-detail__main ul { color: var(--c-silver-700); }
.product-detail__main ul li { padding-left: 0.25rem; }
.product-detail__main img {
  max-width: 100%;
  height: auto;
}

.spec-list {
  background: #fff;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-lg);
  padding: var(--s-6);
}
.spec-list h3 {
  font-size: 1rem;
  color: var(--c-navy-900);
  border-bottom: 2px solid var(--c-blue-100);
  padding-bottom: var(--s-3);
  margin-bottom: var(--s-4);
}
.spec-list dl { margin: 0; }
.spec-list dt {
  font-weight: 600;
  color: var(--c-navy-900);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--s-3);
}
.spec-list dt:first-child { margin-top: 0; }
.spec-list dd {
  margin: 0.2em 0 0 0;
  color: var(--c-silver-700);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--s-3);
  margin: var(--s-6) 0;
}
.gallery img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid var(--c-silver-200);
}

/* --------------------------------------------------------------------------
   11. Sidebar (product list)
   -------------------------------------------------------------------------- */
.layout-with-side {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: var(--s-8);
  margin: var(--s-8) 0;
}
@media (max-width: 900px) {
  .layout-with-side { grid-template-columns: 1fr; }
  .sidebar { position: static !important; }
}
.sidebar {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  align-self: start;
  background: #fff;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-lg);
  padding: var(--s-5);
}
.sidebar h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-navy-900);
  margin: 0 0 var(--s-3) 0;
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--c-silver-200);
}
.sidebar ul { list-style: none; padding: 0; margin: 0; }
.sidebar li { margin: 0; }
.sidebar a {
  display: flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.55rem 0.7rem;
  border-radius: var(--r-sm);
  color: var(--c-silver-900);
  font-size: 0.9rem;
  text-decoration: none;
  transition: all var(--t-fast) var(--ease);
}
.sidebar a::before {
  content: "›";
  color: var(--c-blue-500);
  font-weight: 700;
  opacity: 0.6;
  transition: transform var(--t-fast) var(--ease);
}
.sidebar a:hover {
  background: var(--c-blue-100);
  color: var(--c-blue-500);
}
.sidebar a:hover::before { transform: translateX(2px); }
.sidebar a.is-active {
  background: var(--c-blue-100);
  color: var(--c-blue-500);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   12. Contact
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-8);
  margin: var(--s-8) 0;
}
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact-card {
  background: #fff;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-lg);
  padding: var(--s-6);
}
.contact-card h3 {
  display: flex;
  align-items: center;
  gap: 0.5em;
  font-size: 1.125rem;
  color: var(--c-navy-900);
  margin-bottom: var(--s-4);
}
.contact-card h3 .badge {
  font-size: 0.7rem;
  background: var(--c-blue-100);
  color: var(--c-blue-500);
  padding: 0.2em 0.6em;
  border-radius: var(--r-full);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.contact-info {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--s-3) var(--s-4);
  margin: 0;
}
.contact-info dt {
  font-weight: 600;
  color: var(--c-silver-700);
  font-size: 0.875rem;
  padding-top: 0.1em;
}
.contact-info dd {
  margin: 0;
  color: var(--c-navy-900);
  font-size: 0.9375rem;
}
.contact-info dd a { color: var(--c-navy-900); font-weight: 500; }
.contact-info dd a:hover { color: var(--c-blue-500); }

.contact-form {
  background: #fff;
  border: 1px solid var(--c-silver-200);
  border-radius: var(--r-lg);
  padding: var(--s-6);
}
.contact-form h3 { margin-bottom: var(--s-2); }
.contact-form .form-intro {
  color: var(--c-silver-700);
  font-size: 0.9375rem;
  margin-bottom: var(--s-5);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
  margin-bottom: var(--s-4);
}
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 0.35em; margin-bottom: var(--s-4); }
.form-field label { font-size: 0.875rem; font-weight: 600; color: var(--c-silver-900); }
.form-field label .req { color: var(--c-danger); }
.form-field input,
.form-field select,
.form-field textarea {
  font: inherit;
  padding: 0.7rem 0.85rem;
  border: 1.5px solid var(--c-silver-300);
  border-radius: var(--r-md);
  background: #fff;
  color: var(--c-navy-900);
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
  width: 100%;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--c-blue-500);
  box-shadow: 0 0 0 3px var(--c-blue-100);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-field.has-error input,
.form-field.has-error select,
.form-field.has-error textarea { border-color: var(--c-danger); }
.form-field .err {
  font-size: 0.8125rem;
  color: var(--c-danger);
  margin-top: 0.2em;
  display: none;
}
.form-field.has-error .err { display: block; }
.form-status {
  padding: var(--s-4);
  border-radius: var(--r-md);
  margin-top: var(--s-3);
  display: none;
  font-size: 0.9375rem;
}
.form-status.is-success {
  display: block;
  background: #ecfdf5;
  color: #047857;
  border: 1px solid #a7f3d0;
}
.form-status.is-error {
  display: block;
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fecaca;
}

/* Map */
.map-frame {
  margin-top: var(--s-8);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-silver-200);
  aspect-ratio: 16/7;
  background: var(--c-silver-100);
}
.map-frame iframe { width: 100%; height: 100%; border: 0; display: block; }

/* --------------------------------------------------------------------------
   13. CTA banner
   -------------------------------------------------------------------------- */
.cta {
  background: linear-gradient(135deg, var(--c-navy-900), var(--c-navy-700));
  color: #fff;
  border-radius: var(--r-xl);
  padding: var(--s-12) var(--s-8);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 80% 20%, rgba(53,119,212,0.2), transparent 50%);
  pointer-events: none;
}
.cta h2 { color: #fff; }
.cta p { color: #c8d4e3; max-width: 60ch; margin: 0 auto var(--s-6); }
.cta__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); justify-content: center; position: relative; }

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.footer {
  background: #061528;
  color: #97a8c0;
  padding: var(--s-16) 0 var(--s-6);
  font-size: 0.9375rem;
}
.footer a { color: #c8d4e3; }
.footer a:hover { color: #fff; }
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--s-8);
  margin-bottom: var(--s-10);
}
@media (max-width: 860px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .footer__grid { grid-template-columns: 1fr; }
}
.footer__brand img { height: 56px; width: auto; margin-bottom: var(--s-4); }
.footer__brand p { color: #97a8c0; max-width: 32ch; }
.footer__col h4 {
  color: #fff;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--s-4);
  font-weight: 700;
}
.footer__col ul { list-style: none; padding: 0; margin: 0; }
.footer__col li { margin-bottom: var(--s-2); }
.footer__contact { display: flex; flex-direction: column; gap: var(--s-2); }
.footer__contact span { display: flex; gap: 0.6em; align-items: flex-start; }
.footer__contact svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--c-blue-400); margin-top: 0.2em; }
.footer__social { display: flex; gap: var(--s-2); margin-top: var(--s-4); }
.footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--r-md);
  color: #c8d4e3;
  transition: all var(--t-fast) var(--ease);
}
.footer__social a:hover { background: var(--c-blue-500); border-color: var(--c-blue-500); color: #fff; }
.footer__social svg { width: 18px; height: 18px; }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--s-6);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-3);
  font-size: 0.8125rem;
  color: #6b7a91;
}

/* --------------------------------------------------------------------------
   15. Floating WhatsApp button
   -------------------------------------------------------------------------- */
.fab-whatsapp {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.75rem 1.125rem;
  background: var(--c-whatsapp);
  color: #fff;
  border-radius: var(--r-full);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45), 0 4px 8px rgba(0,0,0,0.15);
  transition: all var(--t-base) var(--ease);
  animation: fab-pulse 2.4s ease-in-out infinite;
}
.fab-whatsapp:hover {
  background: var(--c-whatsapp-dark);
  color: #fff;
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 12px 32px rgba(37, 211, 102, 0.55);
}
.fab-whatsapp svg { width: 22px; height: 22px; flex-shrink: 0; }
.fab-whatsapp .fab-tooltip {
  display: none;
}
@media (min-width: 480px) {
  .fab-whatsapp .fab-tooltip {
    display: inline;
  }
}
@keyframes fab-pulse {
  0%, 100% { box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45), 0 4px 8px rgba(0,0,0,0.15), 0 0 0 0 rgba(37, 211, 102, 0.6); }
  50%      { box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45), 0 4px 8px rgba(0,0,0,0.15), 0 0 0 12px rgba(37, 211, 102, 0); }
}
@media (prefers-reduced-motion: reduce) {
  .fab-whatsapp { animation: none; }
}

/* --------------------------------------------------------------------------
   16. Section dividers + utilities
   -------------------------------------------------------------------------- */
.divider {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin: var(--s-8) 0;
  color: var(--c-silver-500);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--c-silver-200);
}

.text-center { text-align: center; }
.text-muted  { color: var(--c-silver-700); }
.mt-0  { margin-top: 0; }
.mb-0  { margin-bottom: 0; }
.mt-2  { margin-top: var(--s-2); }
.mt-4  { margin-top: var(--s-4); }
.mt-6  { margin-top: var(--s-6); }
.mt-8  { margin-top: var(--s-8); }
.mb-2  { margin-bottom: var(--s-2); }
.mb-4  { margin-bottom: var(--s-4); }
.mb-6  { margin-bottom: var(--s-6); }
.mb-8  { margin-bottom: var(--s-8); }
.hidden-mobile { }
@media (max-width: 600px) { .hidden-mobile { display: none !important; } }

/* --------------------------------------------------------------------------
   17. Animations (entrance, gentle)
   -------------------------------------------------------------------------- */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}
.fade-up.is-in {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .fade-up { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* --------------------------------------------------------------------------
   18. Print
   -------------------------------------------------------------------------- */
@media print {
  .topbar, .header, .footer, .fab-whatsapp, .nav, .cta, .header__cta { display: none !important; }
  body { color: #000; background: #fff; }
  a { color: #000; text-decoration: underline; }
  .section { padding: 1rem 0; }
}