/* SK ENTERPRISE - A Symbol of Quality */
/* International Corporate Manufacturing Design System */

:root {
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --bg-dark: #0a192f;
  --bg-dark-card: #112240;
  
  --primary-navy: #0f294a;
  --primary-navy-light: #1e3a8a;
  --brand-cyan: #0284c7;
  --brand-cyan-light: #e0f2fe;
  --brand-gold: #d97706;
  --brand-gold-light: #fef3c7;
  
  --text-heading: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-brand: rgba(2, 132, 199, 0.3);
  
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', 'Inter', system-ui, sans-serif;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 16px -2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 30px -10px rgba(15, 23, 42, 0.12);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Global */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 85px;
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.modal-open {
  overflow: hidden !important;
  height: 100vh !important;
  touch-action: none;
}

section {
  scroll-margin-top: 85px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-heading);
}

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

a:hover {
  color: var(--primary-navy-light);
}

.container {
  max-width: 1260px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Clean Sleek Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-wrapper {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.official-logo-box {
  background: transparent;
  padding: 0;
  display: flex;
  align-items: center;
}

.official-logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0 16px;
}

.nav-link {
  color: var(--text-body);
  font-size: 0.92rem;
  font-weight: 600;
  white-space: nowrap;
  position: relative;
  padding: 8px 0;
}

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

.nav-link.active::after, .nav-link:hover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--brand-cyan);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary-navy);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 41, 74, 0.2);
}

.btn-primary:hover {
  background: #173866;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(15, 41, 74, 0.3);
}

.btn-outline {
  background: #ffffff;
  color: var(--primary-navy);
  border-color: var(--border-medium);
}

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

.btn-gold {
  background: var(--brand-gold);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.25);
}

.btn-gold:hover {
  background: #b45309;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(217, 119, 6, 0.35);
}

.btn-whatsapp {
  background: #25d366;
  color: #ffffff;
  font-weight: 600;
}

.btn-whatsapp:hover {
  background: #1fba58;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.3);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.88rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--primary-navy);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 70px 0 60px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border-bottom: 1px solid var(--border-light);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--brand-cyan-light);
  border: 1px solid rgba(2, 132, 199, 0.2);
  border-radius: var(--radius-full);
  color: var(--brand-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.85rem;
  letter-spacing: -0.5px;
  color: var(--text-heading);
  margin-bottom: 16px;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* PROMINENT BIG BOLD HIGHLIGHTS IN HERO */
.spec-highlight-container {
  margin: 24px 0 28px;
  padding: 22px;
  background: #ffffff;
  border: 2px solid var(--primary-navy);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(15, 41, 74, 0.08);
}

.spec-highlight-title {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--brand-gold);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.spec-highlight-tags {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.highlight-item-lg {
  background: var(--bg-body);
  border: 1.5px solid var(--border-medium);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition);
}

.highlight-item-lg:hover {
  background: #ffffff;
  border-color: var(--brand-cyan);
  box-shadow: var(--shadow-md);
}

.highlight-item-lg i {
  font-size: 1.4rem;
  color: var(--brand-cyan);
  flex-shrink: 0;
}

.highlight-item-lg span {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-navy);
  font-family: var(--font-heading);
  line-height: 1.2;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.stat-item h3 {
  font-size: 1.8rem;
  color: var(--primary-navy);
  margin-bottom: 4px;
}

.stat-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  background: #ffffff;
}

.hero-image-wrapper img {
  width: 100%;
  height: 460px;
  object-fit: cover;
  display: block;
}

.hero-overlay-card {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  padding: 18px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 16px;
}

.overlay-icon {
  width: 46px;
  height: 46px;
  background: var(--brand-cyan-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-cyan);
  font-size: 1.4rem;
  flex-shrink: 0;
}

/* SPECIALIZATION SHOWCASE SECTION */
.featured-specs-section {
  padding: 64px 0;
  background: #ffffff;
  border-bottom: 1px solid var(--border-light);
}

.spec-grid-lg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.spec-card-lg {
  background: var(--bg-body);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  align-items: flex-start;
  gap: 18px;
  transition: var(--transition);
  cursor: pointer;
}

.spec-card-lg:hover {
  background: #ffffff;
  border-color: var(--brand-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.spec-icon-lg {
  font-size: 2rem;
  color: var(--brand-cyan);
  background: #ffffff;
  padding: 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.spec-card-lg h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--primary-navy);
  margin-bottom: 6px;
  line-height: 1.2;
}

.spec-card-lg p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.section-subtitle {
  color: var(--brand-cyan);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  color: var(--text-heading);
  margin-bottom: 14px;
}

.section-description {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Products Section */
.products-section {
  padding: 80px 0;
}

.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--border-light);
  color: var(--text-body);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.tab-btn:hover, .tab-btn.active {
  background: var(--primary-navy);
  color: #ffffff;
  border-color: var(--primary-navy);
}

.oem-search-bar {
  max-width: 580px;
  margin: 0 auto 40px;
}

.oem-search-input {
  width: 100%;
  padding: 14px 22px;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--border-medium);
  color: var(--text-heading);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.oem-search-input:focus {
  border-color: var(--brand-cyan);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 32px;
}

.product-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

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

.product-img-wrapper {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: #f1f5f9;
}

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

.product-card:hover .product-img-wrapper img {
  transform: scale(1.05);
}

.product-category-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  color: var(--primary-navy);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.product-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 10px;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex: 1;
}

.spec-list {
  list-style: none;
  margin-bottom: 24px;
  padding: 14px 16px;
  background: var(--bg-body);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  border: 1px solid var(--border-light);
}

.spec-list li {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px dashed #cbd5e1;
}

.spec-list li:last-child {
  border-bottom: none;
}

.spec-list .label {
  color: var(--text-muted);
  font-weight: 500;
}

.spec-list .val {
  color: var(--primary-navy);
  font-weight: 600;
}

.product-actions {
  display: flex;
  gap: 12px;
}

/* Custom RFQ Calculator Section */
.rfq-section {
  padding: 80px 0;
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.rfq-container-box {
  background: var(--bg-body);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow-md);
}

.rfq-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--border-medium);
  color: var(--text-heading);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

select.form-control {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  padding-right: 28px;
}

.form-control:focus {
  border-color: var(--brand-cyan);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.dimension-inputs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.dim-sublabel {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.calc-summary-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
}

.summary-row:last-child {
  border-bottom: none;
}

.calc-result-val {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--brand-gold);
}

/* CAPTCHA ANTI-SPAM BOX DESIGN */
.captcha-box {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.captcha-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary-navy);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.captcha-question {
  background: #ffffff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  color: var(--brand-gold);
  font-family: monospace;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 1px;
}

.captcha-input {
  width: 90px;
  max-width: 90px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  outline: none;
}

.captcha-input:focus {
  border-color: var(--brand-cyan);
  box-shadow: 0 0 0 2px rgba(2, 132, 199, 0.2);
}

.captcha-refresh-btn {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.captcha-refresh-btn:hover {
  color: var(--primary-navy);
  border-color: var(--primary-navy);
  background: var(--bg-body);
}

.captcha-refresh-btn:hover {
  color: var(--primary-navy);
  border-color: var(--primary-navy);
  background: var(--bg-body);
}

/* Plant Infrastructure Section */
.infra-section {
  padding: 80px 0;
}

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

.infra-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

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

.infra-icon {
  font-size: 2.2rem;
  color: var(--brand-cyan);
  margin-bottom: 18px;
}

/* Contact Section */
.contact-section {
  padding: 80px 0;
  background: var(--bg-body);
  border-top: 1px solid var(--border-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.info-item {
  display: flex;
  gap: 18px;
  margin-bottom: 28px;
}

.info-icon {
  width: 48px;
  height: 48px;
  background: var(--brand-cyan-light);
  border-radius: var(--radius-md);
  color: var(--brand-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.info-text h4 {
  font-size: 1rem;
  margin-bottom: 4px;
  color: var(--text-heading);
}

.info-text p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Executive Footer */
.footer {
  background: var(--bg-dark);
  color: #ffffff;
  padding: 70px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-about p {
  color: var(--text-light);
  font-size: 0.92rem;
  margin-top: 16px;
  line-height: 1.7;
}

.footer-title {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: #ffffff;
}

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

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

.footer-links a {
  color: var(--text-light);
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-light);
  font-size: 0.88rem;
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 62px;
  height: 62px;
  background: #25d366;
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
  z-index: 999;
  transition: var(--transition);
}

.whatsapp-float:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.5);
  color: white;
}

/* Toast Notification */
.toast-container {
  position: fixed;
  bottom: 30px;
  left: 30px;
  z-index: 3000;
}

.toast {
  background: var(--text-heading);
  color: white;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideIn 0.3s forwards;
}

@keyframes slideIn {
  from { transform: translateX(-100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* MOBILE OPTIMIZED MODAL POPUP & SCROLL LOCK */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: #ffffff;
  border-radius: var(--radius-lg);
  max-width: 680px;
  width: 100%;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
  overflow: hidden;
}

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

/* STICKY TOP MODAL HEADER WITH EASY CLOSE BUTTON */
.modal-header-sticky {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #ffffff;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header-sticky h3 {
  font-size: 1.25rem;
  color: var(--text-heading);
  margin: 0;
  padding-right: 12px;
}

.modal-close-btn {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-medium);
  color: var(--text-heading);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
  flex-shrink: 0;
}

.modal-close-btn:hover {
  background: var(--primary-navy);
  color: #ffffff;
  border-color: var(--primary-navy);
}

/* INNER SCROLLABLE BODY CONTAINER (MOBILE TOUCH SCROLL ENABLED) */
.modal-scroll-body {
  padding: 24px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  flex: 1;
}

.modal-footer-sticky {
  padding: 16px 24px;
  background: var(--bg-body);
  border-top: 1px solid var(--border-light);
  display: flex;
  gap: 12px;
}

/* Responsive Breakpoints */
@media (max-width: 1180px) {
  .nav-links {
    gap: 18px;
  }
  .nav-link {
    font-size: 0.88rem;
  }
}

@media (max-width: 1024px) {
  .hero-grid, .rfq-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .spec-grid-lg, .infra-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .spec-highlight-tags {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

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

  .nav-links.mobile-active {
    display: flex !important;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: #ffffff;
    padding: 24px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
    gap: 16px;
  }
  
  .nav-actions {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  
  .rfq-container-box {
    padding: 20px 14px;
    border-radius: var(--radius-md);
  }
  
  .rfq-grid {
    gap: 24px;
  }
  
  .calc-summary-card {
    padding: 20px 14px;
  }
  
  .contact-info-card {
    padding: 24px 14px;
  }
  
  .spec-grid-lg, .infra-grid {
    grid-template-columns: 1fr;
  }
  
  .dimension-inputs {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .modal-content {
    max-height: 92vh;
    border-radius: var(--radius-md);
  }
  
  .modal-header-sticky {
    padding: 14px 18px;
  }
  
  .modal-scroll-body {
    padding: 18px;
  }

  .modal-footer-sticky {
    flex-direction: column;
    padding: 14px 18px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
  
  .rfq-container-box {
    padding: 16px 10px;
  }

  .form-control {
    padding: 10px 12px;
    font-size: 0.9rem;
  }
  
  .captcha-box {
    padding: 10px 10px;
    gap: 6px;
  }

  .captcha-label {
    font-size: 0.82rem;
    gap: 4px;
  }

  .captcha-question {
    font-size: 0.95rem;
    padding: 3px 8px;
  }

  .captcha-input {
    width: 70px;
    max-width: 70px;
    padding: 6px 8px;
  }
}