/* ===================================================================
   KUSO AIR FILTRATION SYSTEMS (kusoair.com)
   Design Language: Restrained Industrial Engineering (Graphite & Cold White)
   Corporate Palette:
   - Primary (Graphite Slate): #202A2E
   - Background (Cold White):  #F5F7F6
   - Accent (Industrial Teal):  #68B6A2
   - Muted/Secondary (Steel):  #68767A
   =================================================================== */

:root {
  /* Brand Palette (Graphite / Cold White / Industrial Sage Teal) */
  --primary-navy: #202A2E;          /* Primary Graphite Slate */
  --primary-navy-dark: #172023;     /* Deep Technical Charcoal */
  --primary-navy-light: #2D393E;    /* Elevated Graphite */
  
  --primary-blue: #202A2E;          /* Mapped to deep graphite for unified industrial tech tone */
  --primary-blue-hover: #2D393E;
  
  --accent-cyan: #68B6A2;           /* Industrial Sage / Teal Accent (Controlled Touch) */
  --accent-cyan-light: #8DC7B8;
  --accent-cyan-subtle: #EBF3F0;    /* Controlled Cold Tint */
  --accent-cyan-hover: #56A38F;
  
  --color-steel: #68767A;           /* Steel Gray for Secondary Meta / Borders */
  
  /* Neutral Grays & Fresh Backgrounds */
  --bg-pure: #FFFFFF;
  --bg-canvas: #F5F7F6;            /* Cold White Technical Canvas */
  --bg-card: #FFFFFF;
  --bg-subtle: #EEF2F1;            /* Subtle Technical Platinum */
  --border-light: #E0E6E4;         /* Crisp Minimal Gray Border */
  --border-medium: #CBD4D1;
  --border-focus: #68B6A2;
  
  --text-primary: #202A2E;         /* Deep Graphite High-Contrast Text */
  --text-secondary: #3F4B50;       /* Crisp High-Legibility Dark Gray Body Text */
  --text-muted: #68767A;           /* Steel Gray Subtitles / Badges */
  --text-inverse: #FFFFFF;
  
  /* Engineering Shadows */
  --shadow-sm: 0 1px 3px rgba(32, 42, 46, 0.05), 0 1px 2px rgba(32, 42, 46, 0.03);
  --shadow-md: 0 4px 12px -2px rgba(32, 42, 46, 0.07), 0 2px 4px -1px rgba(32, 42, 46, 0.04);
  --shadow-lg: 0 12px 24px -4px rgba(32, 42, 46, 0.09), 0 4px 8px -2px rgba(32, 42, 46, 0.04);
  --shadow-xl: 0 20px 40px -6px rgba(32, 42, 46, 0.12);
  
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 14px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

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

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Navigation (MANN+HUMMEL Benchmark) */
.top-bar {
  background-color: var(--primary-navy-dark);
  color: #A0ACB0;
  font-size: 0.8125rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Language Selector (Top Utility Bar & Mobile) */
.lang-selector-wrap {
  position: relative;
  display: inline-block;
  margin-left: 20px;
}

.lang-selector-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  color: #D4DCD9;
  padding: 5px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  user-select: none;
}

.lang-selector-btn:hover,
.lang-selector-wrap.open .lang-selector-btn {
  background: rgba(255, 255, 255, 0.16);
  color: #FFFFFF;
  border-color: var(--accent-cyan);
}

.lang-selector-btn .lang-arrow {
  font-size: 0.6875rem;
  transition: transform 0.2s ease;
}

.lang-selector-wrap.open .lang-selector-btn .lang-arrow {
  transform: rotate(180deg);
}

.lang-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  min-width: 175px;
  padding: 6px 0;
  display: none;
  z-index: 10000;
  animation: slideDownFade 0.18s ease-out;
}

@keyframes slideDownFade {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.lang-selector-wrap.open .lang-dropdown-menu {
  display: block;
}

.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 16px;
  color: var(--primary-navy);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.lang-option:hover {
  background-color: var(--bg-canvas);
  color: #0077B6;
}

.lang-option.active {
  color: #0077B6;
  font-weight: 800;
  background-color: var(--accent-cyan-subtle);
}

.lang-option-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-option .lang-code {
  font-size: 0.6875rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-weight: 700;
}

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

.top-bar-links a {
  color: #CBD4D1;
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: color 0.18s ease;
}

.top-bar-links a:hover {
  color: var(--accent-cyan);
}

.site-header {
  background-color: #FFFFFF;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 4px rgba(32, 42, 46, 0.05);
  border-bottom: 1px solid var(--border-light);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
  display: block;
}

.footer-logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  display: block;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 20px;
  align-items: center;
  flex-wrap: nowrap;
}

.nav-item {
  position: relative;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s ease;
}

.nav-link:hover, .nav-item.active .nav-link {
  color: var(--accent-cyan-hover);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-cyan);
  transition: width 0.25s ease;
}

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

/* Mega Menu Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background-color: #FFFFFF;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
  border: 1px solid var(--border-light);
  border-top: 3px solid var(--accent-cyan);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding: 24px 26px;
  width: 590px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1000;
}

.nav-item:hover .nav-dropdown,
.nav-item.dropdown-open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-item.dropdown-open .nav-link,
.nav-item:hover .nav-link {
  color: var(--accent-cyan-hover);
}

.nav-item.dropdown-open .nav-link::after,
.nav-item:hover .nav-link::after {
  width: 100%;
}

.dropdown-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.dropdown-col-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--color-steel);
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 8px;
}

.dropdown-list {
  list-style: none;
}

.dropdown-list li a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 6px 0;
  font-weight: 500;
  transition: all 0.18s ease;
}

.dropdown-list li a:hover {
  color: #0077B6;
  font-weight: 600;
  padding-left: 6px;
}

.dropdown-footer-bar {
  grid-column: 1 / -1;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dropdown-footer-link {
  font-size: 0.8125rem;
  font-weight: 800;
  color: #0077B6;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease, color 0.2s ease;
}

.dropdown-footer-link:hover {
  gap: 10px;
  color: var(--accent-cyan);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Mobile Menu Toggle Button */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
}

.mobile-toggle svg {
  width: 26px;
  height: 26px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* Restrained Industrial Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 700;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  text-decoration: none;
}

/* Primary Inquiry Action: Industrial Teal Base + Dark Graphite Text */
.btn-primary, .btn-accent {
  background-color: var(--accent-cyan);
  color: var(--primary-navy-dark);
  border-color: var(--accent-cyan);
  box-shadow: 0 1px 3px rgba(32, 42, 46, 0.1);
}

.btn-primary:hover, .btn-accent:hover {
  background-color: var(--accent-cyan-hover);
  border-color: var(--accent-cyan-hover);
  color: #101618;
  transform: translateY(-1px);
}

/* Secondary Button: Clean Light/Transparent Base + Subtle Border */
.btn-outline {
  border-color: var(--border-medium);
  background-color: #FFFFFF;
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--primary-navy);
  color: var(--primary-navy-dark);
  background-color: var(--bg-subtle);
}

.btn-outline-white {
  border-color: rgba(255, 255, 255, 0.3);
  color: #FFFFFF;
  background-color: transparent;
}

.btn-outline-white:hover {
  border-color: #FFFFFF;
  background-color: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

/* Hero Section: Centered Cinematic Industrial Presentation (Benchmark: Image 1) */
.hero-section {
  position: relative;
  background: #111A20 url('../assets/images/hero_cnc_machining_bg.jpg') center/cover no-repeat;
  color: #FFFFFF;
  padding: 100px 0 80px;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(16, 26, 33, 0.86) 0%, rgba(12, 20, 26, 0.92) 100%);
  z-index: 1;
}

.hero-section > *,
.hero-section .container {
  position: relative;
  z-index: 2;
}

.hero-inner-centered {
  position: relative;
  z-index: 2;
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Dedicated High-Contrast Subpage Hero (Engineering, OEM/ODM, etc.) */
.subpage-hero {
  position: relative;
  background: #172023;
  background: linear-gradient(135deg, #141C20 0%, #1D272B 50%, #222E33 100%);
  color: #FFFFFF;
  padding: 76px 0 84px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.subpage-hero .container {
  position: relative;
  z-index: 2;
}

.subpage-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}

.subpage-hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.16;
  color: #FFFFFF;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.subpage-hero-title span {
  color: #00B4D8;
}

.subpage-hero-desc {
  font-size: 1.0625rem;
  color: #D4DCD9;
  line-height: 1.68;
  max-width: 780px;
  margin-bottom: 32px;
}

.hero-capsule-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 180, 216, 0.4);
  background: rgba(0, 180, 216, 0.08);
  color: #00B4D8;
  border-radius: 24px;
  font-size: 0.75rem;
  letter-spacing: 2px;
  padding: 7px 20px;
  margin-bottom: 24px;
  text-transform: uppercase;
  font-weight: 700;
  backdrop-filter: blur(4px);
}

.hero-title-centered {
  font-size: 3.5rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
  text-align: center;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
}

.hero-title-centered span.highlight-esp {
  color: #00B4D8;
}

.hero-lead-text {
  font-size: 1.1875rem;
  color: #E2ECF4;
  margin-bottom: 12px;
  font-weight: 500;
}

.hero-sub-text {
  font-size: 0.9375rem;
  color: #A0ACB0;
  line-height: 1.6;
  max-width: 780px;
  margin: 0 auto 36px;
}

.hero-btn-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
}

.btn-hero-primary {
  background-color: #00B4D8;
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 14px 32px;
  border-radius: 4px;
  border: none;
  box-shadow: 0 4px 14px rgba(0, 180, 216, 0.35);
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.btn-hero-primary:hover {
  background-color: #0096C7;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 180, 216, 0.45);
}

.btn-hero-outline {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 14px 32px;
  border-radius: 4px;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.btn-hero-outline:hover {
  border-color: #FFFFFF;
  background: rgba(255, 255, 255, 0.1);
}

/* 4-Columns Stats Grid (Benchmark: Image 1) */
.hero-stats-4col {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 36px;
}

.hero-stat-box .num {
  font-size: 2.25rem;
  font-weight: 800;
  color: #00B4D8;
  line-height: 1;
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.hero-stat-box .label {
  font-size: 0.75rem;
  color: #A0ACB0;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-weight: 600;
}

/* Old hero styles preserved for compatibility */
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
  color: #FFFFFF;
}

.hero-description {
  font-size: 1.0625rem;
  color: #D4DCD9;
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 600px;
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stat-item .num {
  font-size: 2rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1;
  font-family: var(--font-mono);
}

.hero-stat-item .label {
  font-size: 0.8125rem;
  color: #94A3B8;
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-card {
  width: 100%;
  max-width: 540px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-top: 1px solid rgba(104, 182, 162, 0.45);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}

.hero-card-img-wrap {
  width: 100%;
  height: 360px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #172023;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-md);
  transition: transform 0.4s ease;
}

.hero-card:hover .hero-card-img {
  transform: scale(1.02);
}

.hero-card-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding: 0 4px;
  font-size: 0.8125rem;
  color: #CBD4D1;
}

.hero-card-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #FFFFFF;
}

.hero-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  display: inline-block;
}

.badge-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  line-height: 1.3;
}

/* Section Header Typography */
.section {
  padding: 96px 0;
}

.section-light {
  background-color: #FFFFFF;
}

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

.section-dark {
  background-color: var(--primary-navy);
  color: #FFFFFF;
}

.section-header {
  margin-bottom: 56px;
}

.section-header.text-center {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.section-kicker {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.8px;
  color: var(--primary-blue);
  margin-bottom: 12px;
  display: block;
}

.section-dark .section-kicker {
  color: var(--accent-cyan-light);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--primary-navy);
  letter-spacing: -0.3px;
  margin-bottom: 16px;
}

.section-dark .section-title {
  color: #FFFFFF;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.section-dark .section-desc {
  color: #E2ECF4;
}

/* Category Tabs & Filter */
.division-selector {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 44px;
}

.division-btn {
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  padding: 11px 24px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.division-btn:hover {
  color: var(--primary-navy);
  border-color: var(--primary-navy);
  background-color: var(--bg-canvas);
}

.division-btn.active {
  background-color: var(--primary-navy);
  color: #FFFFFF;
  border-color: var(--primary-navy);
  box-shadow: 0 2px 8px rgba(32, 42, 46, 0.2);
}

/* Product Cards Grid: Clean Cold White Cards */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 28px;
}

.product-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}

.product-card-img-wrap {
  position: relative;
  height: 260px;
  background-color: #FAFCFB;
  border-bottom: 1px solid var(--border-light);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card-img-wrap img {
  max-height: 100%;
  width: auto;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.product-card:hover .product-card-img-wrap img {
  transform: scale(1.03);
}

.product-card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background-color: var(--primary-navy);
  color: #FFFFFF;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.product-card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-card-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-steel);
  margin-bottom: 8px;
}

.product-card-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 8px;
  line-height: 1.35;
}

.product-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.product-card-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  background-color: var(--bg-canvas);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  border: 1px solid var(--border-light);
}

.metric-item .key {
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.metric-item .val {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary-navy);
  font-family: var(--font-mono);
}

.product-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary-navy);
  transition: all 0.2s ease;
}

.link-arrow:hover {
  gap: 8px;
  color: var(--accent-cyan-hover);
}

/* Technical Specification Tables (MANN+HUMMEL Benchmark) */
.spec-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background-color: #FFFFFF;
  box-shadow: var(--shadow-sm);
  margin-top: 24px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.spec-table th {
  background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
  color: #FFFFFF;
  padding: 15px 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  white-space: nowrap;
}

.spec-table th:last-child {
  border-right: none;
}

.spec-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-light);
  border-right: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-family: var(--font-sans);
}

.spec-table td:last-child {
  border-right: none;
}

.spec-table td.code-col {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--primary-blue);
}

.spec-table tbody tr:nth-child(even) {
  background-color: #F8FBFE;
}

.spec-table tbody tr:hover {
  background-color: var(--accent-cyan-subtle);
}

/* Solutions & Application Scene Cards (With Top Environmental Photography) */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.solution-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.solution-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
  transform: translateY(-4px);
}

.solution-thumb {
  width: 100%;
  height: 220px;
  overflow: hidden;
  position: relative;
  background-color: #E6ECE9;
}

.solution-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

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

.solution-card-body {
  padding: 26px 24px 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.solution-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-steel);
  margin-bottom: 10px;
}

.solution-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 10px;
  line-height: 1.35;
}

.solution-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.solution-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin-bottom: 18px;
}

.solution-tags li {
  font-size: 0.75rem;
  background-color: var(--bg-canvas);
  color: var(--primary-navy);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-weight: 600;
}

/* ===================================================================
   PENMARCH AIR BENCHMARK ARCHITECTURE STYLES
   =================================================================== */

/* ===================================================================
   PENMARCH AIR BENCHMARK ARCHITECTURE STYLES
   =================================================================== */

/* 1. Market Pillars: 3 Application Markets (Exact Match: Image 2) */
.market-pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
}

.market-pillar-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.28s ease;
}

.market-pillar-card:hover {
  transform: translateY(-6px);
  border-color: #00A3E0;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
}

.market-pillar-top-box {
  position: relative;
  width: 100%;
  height: 230px;
  overflow: hidden;
  background-color: #1A242A;
}

.market-pillar-real-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.market-pillar-card:hover .market-pillar-real-img {
  transform: scale(1.05);
}

.market-pillar-gradient-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(16, 26, 33, 0.2) 0%, rgba(12, 20, 26, 0.88) 100%);
  z-index: 1;
}

.market-pillar-text-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 22px 24px;
  z-index: 2;
  color: #FFFFFF;
}

.market-pillar-title-text {
  font-size: 1.45rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 6px;
  line-height: 1.2;
  letter-spacing: -0.3px;
}

.market-pillar-sub-text {
  font-size: 0.8125rem;
  color: #D4DCD9;
  font-weight: 500;
  letter-spacing: 0.3px;
}

.market-pillar-body {
  padding: 26px 24px 22px;
  background: #FFFFFF;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.market-pillar-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.pill-badge {
  background-color: #E8F4F8;
  color: #0077B6;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid rgba(0, 119, 182, 0.15);
  display: inline-block;
  letter-spacing: 0.2px;
}

.market-pillar-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.market-pillar-action-link {
  font-size: 0.8125rem;
  font-weight: 800;
  color: #0077B6;
  text-transform: uppercase;
  letter-spacing: 1px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease, color 0.2s ease;
}

.market-pillar-card:hover .market-pillar-action-link {
  gap: 10px;
  color: #00A3E0;
}

/* ===================================================================
   QUICK ACCESS FLIGHT BAR (Exact Match: Image 3)
   =================================================================== */
.quick-access-dock {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 99999;
  display: flex;
  align-items: flex-start;
  font-family: var(--font-sans);
}

.quick-access-tab {
  background: #FFFFFF;
  border: 1px solid #D0DCE5;
  border-right: none;
  border-radius: 8px 0 0 8px;
  box-shadow: -4px 4px 16px rgba(0, 0, 0, 0.1);
  padding: 14px 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  user-select: none;
  transition: background-color 0.2s ease;
}

.quick-access-tab:hover {
  background-color: #F8FBFE;
}

.quick-access-tab-text {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 0.6875rem;
  font-weight: 800;
  color: #0088CC;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  line-height: 1;
}

.quick-access-tab-arrow {
  color: #0088CC;
  font-size: 0.75rem;
  font-weight: 800;
  transition: transform 0.25s ease;
}

.quick-access-dock.open .quick-access-tab-arrow {
  transform: rotate(180deg);
}

.quick-access-menu {
  width: 240px;
  background: #FFFFFF;
  border: 1px solid #D0DCE5;
  border-right: none;
  border-radius: 8px 0 0 8px;
  box-shadow: -10px 10px 30px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  display: none;
}

.quick-access-dock.open .quick-access-menu {
  display: block;
  animation: slideInDock 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideInDock {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.quick-access-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.quick-access-item {
  border-bottom: 1px solid #E8EEF2;
}

.quick-access-item:last-child {
  border-bottom: none;
}

.quick-access-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  color: #172023;
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.quick-access-item a:hover {
  background-color: #F4F8FA;
  color: #0088CC;
}

.quick-access-item .qa-icon {
  font-size: 1.1rem;
  width: 22px;
  text-align: center;
}

.quick-access-item.highlight a {
  background-color: #00A3E0;
  background: linear-gradient(135deg, #00A3E0 0%, #0088CC 100%);
  color: #FFFFFF;
  font-weight: 800;
}

.quick-access-item.highlight a:hover {
  background: linear-gradient(135deg, #0088CC 0%, #0077B6 100%);
  color: #FFFFFF;
}

/* 2. Why Choose ESP 6-Grid */
.why-esp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.why-esp-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.why-esp-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-md);
}

.why-esp-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.why-esp-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 10px;
}

.why-esp-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 3. Engineering Turnkey Box */
.engineering-overview-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.engineering-checklist {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 28px 0;
}

.engineering-checklist li {
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.engineering-checklist li::before {
  content: "✔";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-cyan-subtle);
  color: var(--accent-cyan-hover);
  font-size: 0.75rem;
  font-weight: 800;
}

/* 4. Case Examples Grid */
.case-examples-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 32px;
}

.case-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
}

.case-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--color-steel);
  margin-bottom: 10px;
}

.case-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-navy);
  margin-bottom: 12px;
}

.case-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

/* Dual Button Group on Product Cards */
.card-action-group {
  display: flex;
  gap: 10px;
  width: 100%;
}

.card-action-group .btn {
  flex: 1;
  padding: 8px 12px;
  font-size: 0.8125rem;
}

/* Contact & RFQ Form */
.rfq-box {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-xl);
  padding: 50px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-full {
  grid-column: 1 / -1;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 13px 18px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--text-primary);
  background-color: #FFFFFF;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 119, 182, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* Breadcrumbs & Product Detail Hero */
.breadcrumbs {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--primary-blue);
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.detail-gallery-main {
  background: linear-gradient(180deg, #FFFFFF 0%, #F1F6FB 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  margin-bottom: 24px;
  position: relative;
}

.detail-gallery-main img {
  max-height: 480px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 10px 24px rgba(10, 37, 64, 0.1));
  transition: transform 0.4s ease;
}

.detail-gallery-main:hover img {
  transform: scale(1.02);
}

.detail-feature-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.detail-feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-md);
}

/* Footer (MANN+HUMMEL Benchmark) */
.site-footer {
  background-color: var(--primary-navy-dark);
  color: #94A3B8;
  padding: 84px 0 36px;
  border-top: 4px solid var(--accent-cyan);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.6;
  margin-top: 18px;
  color: #CBDCEB;
  max-width: 320px;
}

.footer-col-title {
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: #FFFFFF;
  margin-bottom: 22px;
  border-left: 3px solid var(--accent-cyan);
  padding-left: 10px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  font-size: 0.875rem;
  color: #94A3B8;
  transition: all 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent-cyan-light);
  padding-left: 6px;
}

.footer-contact-item {
  display: flex;
  gap: 12px;
  font-size: 0.875rem;
  color: #CBDCEB;
  margin-bottom: 14px;
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8125rem;
}

.footer-legal-links a {
  margin-left: 20px;
  color: #94A3B8;
}

.footer-legal-links a:hover {
  color: #FFFFFF;
}

/* ===================================================================
   ENHANCED COMPONENTS (Benchmark: PenmarchAir Structure)
   =================================================================== */

/* 1. Pollutant Matrix Grid */
.pollutant-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  margin-top: 24px;
}

.pollutant-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.pollutant-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-md);
  background: var(--accent-cyan-subtle);
}

.pollutant-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  line-height: 1;
}

.pollutant-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 6px;
}

.pollutant-apps {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* 2. Process Pipeline (5-Stage Engineered Flow) */
.process-pipeline {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 12px;
  position: relative;
  margin-top: 36px;
}

.pipeline-step {
  flex: 1;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 18px;
  position: relative;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

.pipeline-step:hover {
  transform: translateY(-4px);
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
}

.pipeline-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-navy) 100%);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 0.75rem;
  margin-bottom: 12px;
}

.pipeline-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.pipeline-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 8px;
}

.pipeline-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.pipeline-arrow {
  display: flex;
  align-items: center;
  color: var(--primary-blue);
  font-size: 1.5rem;
  font-weight: 700;
}

/* 3. Technology Comparison Matrix */
.comp-matrix-table {
  width: 100%;
  border-collapse: collapse;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  margin-top: 24px;
}

.comp-matrix-table th {
  background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
  color: #FFFFFF;
  padding: 16px 20px;
  font-weight: 700;
  font-size: 0.9375rem;
  text-align: left;
}

.comp-matrix-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.comp-matrix-table tr:hover {
  background: var(--accent-cyan-subtle);
}

.comp-matrix-table .tag-ideal {
  color: #059669;
  font-weight: 700;
}

.comp-matrix-table .tag-fair {
  color: #D97706;
  font-weight: 600;
}

.comp-matrix-table .tag-poor {
  color: #DC2626;
  font-weight: 600;
}

/* 4. OEM & ODM 6-Step Grid */
.oem-steps-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.oem-step-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all 0.25s ease;
}

.oem-step-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
}

.oem-step-num {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  line-height: 1;
  margin-bottom: 12px;
}

.oem-step-card h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 8px;
}

.oem-step-card p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* 5. Resources Grid */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 30px;
}

.resource-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px 20px;
  text-align: center;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
  display: block;
}

.resource-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
  background: var(--accent-cyan-subtle);
}

.resource-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.resource-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 6px;
}

.resource-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 6. Floating Action WhatsApp */
.floating-whatsapp {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 56px;
  height: 56px;
  background-color: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
  z-index: 9999;
  transition: all 0.25s ease;
}

.floating-whatsapp:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.6);
}

.floating-whatsapp svg {
  width: 32px;
  height: 32px;
  fill: #FFFFFF;
}

/* Responsive Overrides */
@media (max-width: 1240px) and (min-width: 1025px) {
  .nav-menu {
    gap: 14px;
  }
  .nav-link {
    font-size: 0.8125rem;
  }
  .header-actions .btn {
    padding: 8px 16px;
    font-size: 0.8125rem;
  }
  .brand-logo-img {
    height: 38px;
  }
}

@media (max-width: 1024px) {
  .hero-title-centered {
    font-size: 2.75rem;
    text-align: center;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .pollutant-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .oem-steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .resources-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Switch navigation to clean drawer on tablets and below */
  .top-bar {
    display: none;
  }
  .header-inner {
    height: 70px;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    flex-direction: column;
    padding: 20px 24px 28px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--border-light);
    gap: 16px;
    align-items: flex-start;
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-dropdown {
    position: static;
    transform: none;
    width: 100%;
    box-shadow: none;
    border: none;
    padding: 12px 0 0 12px;
    display: none;
    opacity: 1;
    visibility: visible;
  }
  .nav-item.open-mobile .nav-dropdown,
  .nav-item.dropdown-open .nav-dropdown {
    display: block;
  }
}

@media (max-width: 768px) {
  .hero-title-centered {
    font-size: 2.125rem;
    text-align: center;
  }
  .hero-title {
    font-size: 2rem;
  }
  .solutions-grid, .product-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pollutant-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .oem-steps-grid {
    grid-template-columns: 1fr;
  }
  .resources-grid {
    grid-template-columns: 1fr;
  }
  .process-pipeline {
    flex-direction: column;
    gap: 16px;
  }
  .pipeline-arrow {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  .footer-legal-links a {
    margin: 0 8px;
  }
}