/* ==========================================================================
   MUKTO BANGLA ELECTRIC (মুক্ত বাংলা ইলেকট্রিক)
   Official Corporate Design System & Industrial Stylesheet
   Palette: Deep Industrial Navy (#0b1b2b), Brushed Copper (#c86d27), Slate Gray
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
  /* Brand Corporate Colors */
  --color-navy-950: #050c14;
  --color-navy-900: #0b1b2b;
  --color-navy-850: #102338;
  --color-navy-800: #152b45;
  --color-navy-700: #1e3a5f;
  
  --color-copper-600: #9a4e15;
  --color-copper-500: #c86d27;
  --color-copper-400: #e07a2d;
  --color-copper-300: #f59e0b;
  --color-copper-soft: rgba(200, 109, 39, 0.12);
  --color-copper-glow: rgba(200, 109, 39, 0.28);
  
  --color-slate-900: #0f172a;
  --color-slate-800: #1e293b;
  --color-slate-700: #334155;
  --color-slate-600: #475569;
  --color-slate-500: #64748b;
  --color-slate-400: #94a3b8;
  --color-slate-200: #e2e8f0;
  --color-slate-100: #f1f5f9;
  --color-slate-50:  #f8fafc;
  --color-white:     #ffffff;

  /* Accent Metallics */
  --grad-copper: linear-gradient(135deg, #f59e0b 0%, #c86d27 50%, #9a4e15 100%);
  --grad-navy: linear-gradient(180deg, #0b1b2b 0%, #07131e 100%);
  --grad-card-dark: linear-gradient(145deg, #102338 0%, #0c1a29 100%);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Space Grotesk', 'Plus Jakarta Sans', sans-serif;
  --font-bengali: 'Hind Siliguri', 'Plus Jakarta Sans', sans-serif;

  /* Layout & Spacing */
  --container-max: 1240px;
  --nav-height: 84px;
  --topbar-height: 40px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows & Borders */
  --border-subtle-dark: 1px solid rgba(255, 255, 255, 0.08);
  --border-subtle-light: 1px solid rgba(11, 27, 43, 0.09);
  --border-copper: 1px solid rgba(200, 109, 39, 0.35);
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 14px rgba(11, 27, 43, 0.08);
  --shadow-lg: 0 10px 30px rgba(11, 27, 43, 0.12);
  --shadow-dark-card: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-copper: 0 8px 25px rgba(200, 109, 39, 0.25);

  /* Transitions */
  --transition-fast: 0.18s ease;
  --transition-base: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Base Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-slate-50);
  color: var(--color-slate-800);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* --- Typography Helpers --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-navy-900);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.bn-font {
  font-family: var(--font-bengali);
}

.text-copper {
  color: var(--color-copper-500) !important;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Section Header Structure */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-copper-500);
  background: var(--color-copper-soft);
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(200, 109, 39, 0.25);
  margin-bottom: 14px;
}

.section-tag.light {
  background: rgba(255, 255, 255, 0.08);
  color: #f39c12;
  border-color: rgba(243, 156, 18, 0.35);
}

.section-title {
  font-size: clamp(1.85rem, 3.2vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-slate-600);
  line-height: 1.6;
}

.section-header.text-white .section-title {
  color: var(--color-white);
}

.section-header.text-white .section-subtitle {
  color: var(--color-slate-400);
}

/* ==========================================================================
   1. TOP UTILITY BAR (Corporate Contact & Trade Disclosures)
   ========================================================================== */
.top-bar {
  background-color: var(--color-navy-950);
  color: var(--color-slate-400);
  font-size: 0.78rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  position: relative;
  z-index: 101;
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--topbar-height);
  flex-wrap: wrap;
}

.top-bar-left, .top-bar-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.top-bar-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.top-bar-item svg {
  width: 14px;
  height: 14px;
  fill: var(--color-copper-400);
}

.top-bar-item a:hover {
  color: var(--color-white);
}

.trade-affil-pill {
  background: rgba(200, 109, 39, 0.15);
  color: #ffb877;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  border: 1px solid rgba(200, 109, 39, 0.3);
}

/* ==========================================================================
   2. MAIN HEADER & LOGO (Sticky Navigation)
   ========================================================================== */
.main-header {
  background: rgba(11, 27, 43, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-base);
}

.main-header.scrolled {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

/* Brand Logo Container */
.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-svg-logo {
  height: 52px;
  width: auto;
  display: block;
}

/* Navigation Links */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-link {
  color: #d1d5db;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 6px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-copper-500);
  transition: width var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-white);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Primary Button Styling */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-copper {
  background: var(--grad-copper);
  color: var(--color-white);
  box-shadow: var(--shadow-copper);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-copper:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(200, 109, 39, 0.4);
  color: var(--color-white);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-copper-400);
  color: var(--color-white);
}

.btn-navy {
  background: var(--color-navy-900);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-navy:hover {
  background: var(--color-navy-800);
  transform: translateY(-2px);
}

.mobile-menu-toggle {
  display: none;
  color: var(--color-white);
  font-size: 1.5rem;
  padding: 8px;
}

/* ==========================================================================
   3. HERO SECTION (Industrial Authority & Trust)
   ========================================================================== */
.hero-section {
  background: radial-gradient(circle at 80% 20%, rgba(200, 109, 39, 0.12) 0%, rgba(11, 27, 43, 0) 60%),
              linear-gradient(180deg, var(--color-navy-900) 0%, #07131e 100%);
  color: var(--color-white);
  padding: 72px 0 90px 0;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* Subtle Industrial Grid Pattern Background */
.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(200, 109, 39, 0.14);
  border: 1px solid rgba(200, 109, 39, 0.35);
  color: #ffae68;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
  letter-spacing: 0.05em;
}

.hero-badge-pill .pulse-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 10px #22c55e;
}

.hero-title {
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-white);
  margin-bottom: 18px;
  letter-spacing: -0.03em;
}

.hero-title .copper-text {
  background: var(--grad-copper);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-bengali-title {
  font-family: var(--font-bengali);
  font-size: 1.28rem;
  color: #cbd5e1;
  font-weight: 500;
  margin-bottom: 20px;
  display: block;
}

.hero-lead {
  font-size: 1.08rem;
  color: var(--color-slate-400);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

/* Proprietor Micro Card */
.proprietor-card {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 10px 18px;
  border-radius: var(--radius-md);
}

.proprietor-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--grad-copper);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
}

.proprietor-meta .name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-white);
}

.proprietor-meta .role {
  font-size: 0.76rem;
  color: var(--color-copper-400);
  font-weight: 600;
}

/* Hero Visual Showcase Window */
.hero-visual-box {
  position: relative;
}

.hero-feature-frame {
  background: var(--color-navy-850);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-xl);
  padding: 16px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.hero-feature-frame::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-copper);
}

.hero-product-img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  display: block;
}

/* Hero Floating Badges */
.hero-float-badge {
  position: absolute;
  bottom: 28px;
  right: 28px;
  background: rgba(11, 27, 43, 0.92);
  border: 1px solid rgba(200, 109, 39, 0.4);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
}

.hero-float-badge svg {
  width: 28px;
  height: 28px;
  fill: var(--color-copper-400);
}

.hero-float-badge .badge-label {
  font-size: 0.72rem;
  color: var(--color-slate-400);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero-float-badge .badge-val {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-white);
}

/* ==========================================================================
   KPI STATS STRIP
   ========================================================================== */
.stats-strip {
  background: #07131e;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 28px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 6px 12px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-item:last-child {
  border-right: none;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(200, 109, 39, 0.12);
  border: 1px solid rgba(200, 109, 39, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-copper-400);
  flex-shrink: 0;
}

.stat-icon svg {
  width: 22px;
  height: 22px;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
}

.stat-desc {
  font-size: 0.78rem;
  color: var(--color-slate-400);
  font-weight: 600;
}

/* ==========================================================================
   4. ACCREDITATIONS & MEMBERSHIPS (Official Trust Row)
   ========================================================================== */
.accreditations-section {
  padding: 90px 0;
  background-color: var(--color-white);
  position: relative;
}

.accreditations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.accreditation-card {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.accreditation-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-copper-400);
  box-shadow: var(--shadow-md);
}

.accreditation-seal-box {
  width: 130px;
  height: 130px;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: 50%;
  padding: 10px;
  border: 2px solid rgba(11, 27, 43, 0.08);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

.accreditation-seal-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.verified-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: #ecfdf5;
  color: #047857;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid #a7f3d0;
  margin-bottom: 14px;
}

.verified-badge svg {
  width: 14px;
  height: 14px;
  fill: #059669;
}

.accreditation-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-navy-900);
  margin-bottom: 8px;
  line-height: 1.35;
}

.accreditation-bengali {
  font-family: var(--font-bengali);
  font-size: 0.95rem;
  color: var(--color-slate-600);
  margin-bottom: 14px;
}

.accreditation-desc {
  font-size: 0.88rem;
  color: var(--color-slate-600);
  line-height: 1.6;
  margin-bottom: 20px;
}

.accreditation-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--color-slate-200);
  width: 100%;
  font-size: 0.76rem;
  color: var(--color-slate-500);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ==========================================================================
   5. PRODUCT ARCHITECTURE (The Mukto Series Showcase)
   ========================================================================== */
.products-section {
  padding: 95px 0;
  background-color: var(--color-slate-100);
  position: relative;
}

/* Filter Navigation */
.product-filters {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.filter-btn {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-slate-600);
  background: var(--color-white);
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid var(--color-slate-200);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-navy-900);
  border-color: var(--color-copper-500);
}

.filter-btn.active {
  background: var(--color-navy-900);
  color: var(--color-white);
  border-color: var(--color-navy-900);
  box-shadow: 0 4px 12px rgba(11, 27, 43, 0.2);
}

/* Product Cards Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-copper-400);
  box-shadow: var(--shadow-lg);
}

/* Product Canvas & Image Container */
.product-image-canvas {
  position: relative;
  background: #f1f5f9;
  height: 250px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.product-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.4s ease;
}

.product-card:hover .product-img {
  transform: scale(1.04);
}

/* --- THE "MUKTO" SECURITY HOLOGRAM BADGE --- */
/* Authentic tamper-evident laser foil hologram stamp with Mukto text */
.mukto-hologram-seal {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 5;
  background: linear-gradient(135deg, #ffd700 0%, #ff8c00 25%, #00ffff 50%, #ff007f 75%, #ffd700 100%);
  background-size: 300% 300%;
  animation: hologramShine 5s linear infinite;
  padding: 2px;
  border-radius: 8px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.25);
}

.mukto-hologram-inner {
  background: rgba(11, 27, 43, 0.92);
  padding: 4px 10px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.mukto-hologram-text {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  background: linear-gradient(90deg, #ffea79, #ffffff, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-transform: uppercase;
}

.mukto-hologram-sparkle {
  color: #ffae68;
  font-size: 0.75rem;
}

@keyframes hologramShine {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Category Badge */
.product-cat-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(11, 27, 43, 0.85);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}

/* Product Content & Specifications */
.product-details {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-code-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.product-code {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-copper-500);
  letter-spacing: 0.06em;
}

.product-rating-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: #047857;
  background: #ecfdf5;
  padding: 2px 8px;
  border-radius: 4px;
}

.product-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--color-navy-900);
  margin-bottom: 12px;
  line-height: 1.35;
}

.product-specs-table {
  width: 100%;
  margin-bottom: 20px;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.product-specs-table tr {
  border-bottom: 1px solid var(--color-slate-100);
}

.product-specs-table tr:last-child {
  border-bottom: none;
}

.product-specs-table td {
  padding: 6px 0;
}

.product-specs-table td.spec-name {
  color: var(--color-slate-500);
  font-weight: 600;
  width: 42%;
}

.product-specs-table td.spec-val {
  color: var(--color-slate-800);
  font-weight: 700;
  text-align: right;
}

.product-card-footer {
  margin-top: auto;
  display: flex;
  gap: 10px;
}

.product-card-footer .btn {
  flex: 1;
  padding: 10px 14px;
  font-size: 0.8rem;
}

/* ==========================================================================
   6. B2B COMPLETE SERIES CATALOG BROWSER (High Resolution Flyers)
   ========================================================================== */
.series-catalog-section {
  padding: 90px 0;
  background-color: var(--color-navy-900);
  color: var(--color-white);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.catalog-carousel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.catalog-flyer-card {
  background: var(--color-navy-850);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
}

.catalog-flyer-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-copper-400);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}

.catalog-flyer-thumb {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
}

.catalog-flyer-meta {
  padding: 16px;
  background: var(--color-navy-850);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.catalog-flyer-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 4px;
}

.catalog-flyer-sub {
  font-size: 0.75rem;
  color: var(--color-copper-400);
  font-weight: 600;
}

.catalog-zoom-hint {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(11, 27, 43, 0.85);
  color: var(--color-white);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   7. INDUSTRIAL RIGOR & FACTORY TESTING LAB
   ========================================================================== */
.manufacturing-rigor-section {
  padding: 95px 0;
  background-color: var(--color-white);
}

.rigor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.rigor-img-frame {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-slate-200);
}

.rigor-main-img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.rigor-floating-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(11, 27, 43, 0.95), transparent);
  color: var(--color-white);
  padding: 30px 24px 20px 24px;
}

.rigor-features-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.rigor-feature-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.rigor-feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-copper-soft);
  color: var(--color-copper-500);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid rgba(200, 109, 39, 0.25);
}

.rigor-feature-icon svg {
  width: 22px;
  height: 22px;
}

.rigor-feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-navy-900);
  margin-bottom: 6px;
}

.rigor-feature-desc {
  font-size: 0.9rem;
  color: var(--color-slate-600);
  line-height: 1.6;
}

/* ==========================================================================
   8. ASSOCIATED CONCERNS (Sister Enterprise Triad)
   ========================================================================== */
.associated-section {
  padding: 90px 0;
  background-color: var(--color-slate-50);
  border-top: 1px solid var(--color-slate-200);
  border-bottom: 1px solid var(--color-slate-200);
}

.associated-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.associated-card {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.associated-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-copper-400);
  box-shadow: var(--shadow-md);
}

.associated-logo-slot {
  height: 70px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
}

.associated-logo-slot img, .associated-logo-slot svg {
  max-height: 100%;
  width: auto;
}

.associated-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-navy-900);
  margin-bottom: 4px;
}

.associated-role {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-copper-500);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.associated-desc {
  font-size: 0.88rem;
  color: var(--color-slate-600);
  line-height: 1.65;
  margin-bottom: 18px;
}

.associated-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.associated-pill {
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--color-slate-100);
  color: var(--color-slate-700);
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--color-slate-200);
}

/* ==========================================================================
   9. HUMAN-DESIGNED B2B / WHOLESALE INQUIRY FORM
   ========================================================================== */
.inquiry-section {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--color-navy-900) 0%, #081421 100%);
  color: var(--color-white);
  position: relative;
}

.inquiry-grid {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 52px;
  align-items: flex-start;
}

.inquiry-intro-box {
  padding-right: 20px;
}

.inquiry-intro-box .section-tag {
  background: rgba(200, 109, 39, 0.18);
  border-color: rgba(200, 109, 39, 0.4);
  color: #ffae68;
}

.inquiry-title {
  font-size: clamp(2rem, 3.2vw, 2.7rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: 16px;
}

.inquiry-desc {
  font-size: 1rem;
  color: var(--color-slate-300);
  line-height: 1.7;
  margin-bottom: 32px;
}

.inquiry-perks {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 40px;
}

.perk-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.92rem;
  color: var(--color-slate-200);
  font-weight: 600;
}

.perk-item svg {
  width: 20px;
  height: 20px;
  fill: var(--color-copper-400);
  flex-shrink: 0;
}

.inquiry-direct-hotline {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}

.hotline-label {
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--color-copper-400);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.hotline-numbers {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.5;
}

/* Form Card Container */
.inquiry-form-card {
  background: var(--color-white);
  color: var(--color-slate-800);
  border-radius: var(--radius-xl);
  padding: 38px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.form-header-text {
  margin-bottom: 24px;
}

.form-header-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-navy-900);
  margin-bottom: 4px;
}

.form-header-sub {
  font-size: 0.85rem;
  color: var(--color-slate-500);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.col-span-2 {
  grid-column: span 2;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-slate-700);
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  font-size: 0.9rem;
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  color: var(--color-slate-900);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  background: var(--color-white);
  border-color: var(--color-copper-500);
  box-shadow: 0 0 0 3px rgba(200, 109, 39, 0.15);
}

textarea.form-control {
  min-height: 95px;
  resize: vertical;
}

.checkbox-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 4px;
}

.custom-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-slate-700);
  cursor: pointer;
}

.custom-checkbox input[type="checkbox"] {
  accent-color: var(--color-copper-500);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.form-submit-row {
  margin-top: 22px;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   10. TRADE OFFICE & FACTORY HUB (Contact & Location)
   ========================================================================== */
.contact-section {
  padding: 95px 0;
  background-color: var(--color-white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-card-box {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 22px;
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.contact-card-box:hover {
  border-color: var(--color-copper-400);
  box-shadow: var(--shadow-sm);
}

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-copper-soft);
  color: var(--color-copper-500);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-card-icon svg {
  width: 22px;
  height: 22px;
}

.contact-card-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-navy-900);
  margin-bottom: 4px;
}

.contact-card-text {
  font-size: 0.9rem;
  color: var(--color-slate-600);
  line-height: 1.6;
}

.contact-numbers-flex {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.phone-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--color-navy-900);
}

.phone-link-btn:hover {
  background: var(--color-copper-soft);
  border-color: var(--color-copper-400);
  color: var(--color-copper-600);
}

/* Location Map Card */
.map-container-box {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.map-header {
  padding: 20px 24px;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-slate-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.map-header-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-navy-900);
}

.map-visual-placeholder {
  height: 320px;
  background: radial-gradient(circle at 50% 50%, #1e3a5f 0%, #0b1b2b 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
  padding: 24px;
}

.map-pin-pulse {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(200, 109, 39, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px auto;
  animation: pulsePin 2s infinite;
}

.map-pin-core {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-copper-400);
}

@keyframes pulsePin {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(200, 109, 39, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 15px rgba(200, 109, 39, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(200, 109, 39, 0); }
}

.map-hub-meta {
  padding: 20px 24px;
  background: var(--color-white);
  border-top: 1px solid var(--color-slate-200);
}

/* ==========================================================================
   11. CORPORATE FOOTER
   ========================================================================== */
.main-footer {
  background: var(--color-navy-950);
  color: var(--color-slate-400);
  padding: 80px 0 30px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 0.9fr 1.1fr;
  gap: 44px;
  margin-bottom: 60px;
}

.footer-brand-col .brand-svg-logo {
  height: 58px;
  margin-bottom: 20px;
}

.footer-about-text {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--color-slate-400);
  margin-bottom: 22px;
}

.footer-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: 0.04em;
  margin-bottom: 20px;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--color-slate-400);
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-copper-400);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  gap: 12px;
  font-size: 0.86rem;
  color: var(--color-slate-400);
  margin-bottom: 14px;
  line-height: 1.5;
}

.footer-contact-item svg {
  width: 16px;
  height: 16px;
  fill: var(--color-copper-400);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
}

.footer-developer {
  font-size: 0.82rem;
}

.footer-developer a {
  color: var(--color-slate-400);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-fast);
}

.footer-developer a span {
  color: var(--color-copper-400);
  font-weight: 700;
  transition: color var(--transition-fast), text-decoration var(--transition-fast);
}

.footer-developer a:hover {
  color: #cbd5e1;
}

.footer-developer a:hover span {
  color: #ea580c;
  text-decoration: underline;
}

/* ==========================================================================
   12. INTERACTIVE MODALS & TOAST NOTIFICATIONS
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 12, 20, 0.85);
  backdrop-filter: blur(6px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: 20px;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  max-width: 650px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.modal-backdrop.active .modal-box {
  transform: translateY(0);
}

.modal-header {
  padding: 24px 28px;
  border-bottom: 1px solid var(--color-slate-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-close-btn {
  font-size: 1.5rem;
  color: var(--color-slate-400);
  line-height: 1;
  padding: 4px;
  transition: color var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--color-slate-800);
}

.modal-body {
  padding: 28px;
}

/* Toast Notification */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--color-navy-900);
  color: var(--color-white);
  border: 1px solid var(--color-copper-500);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-msg.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   13. RESPONSIVE DESIGN (Tablets & Mobile)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .accreditations-grid, .associated-grid {
    grid-template-columns: 1fr;
  }
  .catalog-carousel-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .inquiry-grid, .contact-grid, .rigor-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 72px;
  }
  .top-bar {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-navy-900);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateY(-150%);
    transition: transform var(--transition-base);
  }
  .nav-menu.open {
    transform: translateY(0);
  }
  .header-actions .btn {
    display: none;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .products-grid {
    grid-template-columns: 1fr;
  }
  .catalog-carousel-grid {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-group.col-span-2 {
    grid-column: span 1;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}