/* ==========================================================================
   CÔNG TY TNHH ĐỖ KIÊN 36 - MAIN STYLESHEET
   Design System: Sapphire Blue & Royal Gold (Logistics & Distribution)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&display=swap');

:root {
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  
  /* Brand Palette */
  --brand-primary: #0f4c81;       /* Sapphire Blue */
  --brand-primary-dark: #0a355c;  /* Deep Navy */
  --brand-primary-light: #0284c7; /* Sky Accent */
  --brand-accent: #f59e0b;        /* Royal Gold / Amber */
  --brand-accent-hover: #d97706;  /* Deep Gold */
  --brand-accent-light: #fef3c7;  /* Gold Tint */
  
  /* Surfaces & Backgrounds */
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --border-color: #e2e8f0;
  
  /* Text */
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  /* Utilities */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.12);
  --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Mode Tokens */
body.dark-mode {
  --bg-body: #090e17;
  --bg-surface: #111827;
  --bg-surface-alt: #1f2937;
  --bg-glass: rgba(17, 24, 39, 0.92);
  --border-color: #374151;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.6);
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

ul {
  list-style: none;
}

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

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   TOP BAR (HOTLINE & LEGAL HIGHLIGHT)
   ========================================================================== */
.top-bar {
  background: linear-gradient(90deg, #0a355c 0%, #0f4c81 100%);
  color: #e2e8f0;
  font-size: 0.82rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.top-bar-left, .top-bar-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.top-bar-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.top-bar-item strong {
  color: var(--brand-accent);
}

.badge-legal {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.72rem;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

/* ==========================================================================
   NAVIGATION HEADER
   ========================================================================== */
.main-header {
  position: sticky;
  top: 0;
  z-index: 990;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 82px;
}

.brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 56px;
}

.brand-logo-img {
  height: 56px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2.5px;
  background: var(--brand-accent);
  transition: width 0.25s ease;
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--brand-primary);
}

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

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

.btn-theme-toggle {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  transition: var(--transition);
}

.btn-theme-toggle:hover {
  background: var(--border-color);
  transform: rotate(20deg);
}

.nav-toggle-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 0.92rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(217, 119, 6, 0.45);
}

.btn-secondary {
  background: var(--brand-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(15, 76, 129, 0.3);
}

.btn-secondary:hover {
  background: var(--brand-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(15, 76, 129, 0.4);
}

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

.btn-outline:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: rgba(15, 76, 129, 0.04);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.82rem;
}

/* ==========================================================================
   HERO SHOWCASE SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 70px 0 80px;
  background: radial-gradient(circle at top right, rgba(2, 132, 199, 0.12) 0%, transparent 50%),
              radial-gradient(circle at bottom left, rgba(245, 158, 11, 0.08) 0%, transparent 40%),
              var(--bg-body);
  overflow: hidden;
}

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

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 76, 129, 0.08);
  border: 1px solid rgba(15, 76, 129, 0.2);
  color: var(--brand-primary);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 800;
  margin-bottom: 20px;
}

body.dark-mode .hero-badge-pill {
  background: rgba(2, 132, 199, 0.15);
  border-color: rgba(2, 132, 199, 0.3);
  color: #38bdf8;
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.8px;
  margin-bottom: 20px;
  color: var(--text-main);
}

.hero-title .highlight {
  background: linear-gradient(135deg, #0284c7 0%, #0f4c81 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title .highlight-gold {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 32px;
}

.hero-legal-box {
  background: var(--bg-surface);
  border-left: 4px solid var(--brand-accent);
  padding: 14px 18px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow: var(--shadow-sm);
  margin-bottom: 30px;
  font-size: 0.9rem;
}

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

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 1.65rem;
  font-weight: 900;
  color: var(--brand-primary);
  line-height: 1.1;
}

body.dark-mode .stat-num {
  color: #38bdf8;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Hero Visual Card */
.hero-visual-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.hero-visual-card img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.5s ease;
}

.hero-visual-card:hover img {
  transform: scale(1.03);
}

.hero-visual-badge {
  position: absolute;
  top: 18px;
  left: 18px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  color: #ffffff;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-visual-badge .dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
}

.hero-visual-footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.95) 100%);
  color: #ffffff;
  padding: 24px 20px 18px;
}

.hero-visual-title {
  font-size: 1.15rem;
  font-weight: 900;
  margin-bottom: 4px;
}

.hero-visual-sub {
  font-size: 0.82rem;
  color: #cbd5e1;
}

/* ==========================================================================
   SECTION HEADERS
   ========================================================================== */
.section {
  padding: 80px 0;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-badge {
  display: inline-block;
  background: var(--brand-accent-light);
  color: #b45309;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

body.dark-mode .section-badge {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
  color: var(--text-main);
  line-height: 1.3;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   CORE SERVICES / 3 MAIN PILLARS
   ========================================================================== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: transparent;
  transition: var(--transition);
}

.pillar-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(15, 76, 129, 0.3);
}

.pillar-card:hover::before {
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
}

.pillar-icon-box {
  width: 64px;
  height: 64px;
  background: rgba(15, 76, 129, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.85rem;
  margin-bottom: 20px;
  color: var(--brand-primary);
  transition: var(--transition);
}

body.dark-mode .pillar-icon-box {
  background: rgba(2, 132, 199, 0.15);
  color: #38bdf8;
}

.pillar-card:hover .pillar-icon-box {
  transform: scale(1.1);
  background: var(--brand-primary);
  color: #ffffff;
}

.pillar-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.pillar-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.pillar-features-list {
  font-size: 0.85rem;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pillar-features-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pillar-features-list li::before {
  content: '✓';
  color: #10b981;
  font-weight: 900;
}

/* ==========================================================================
   PRODUCTS & WHOLESALE CATALOG
   ========================================================================== */
.catalog-section {
  background: var(--bg-surface-alt);
}

.filter-tabs-wrapper {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-tab-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-tab-btn:hover,
.filter-tab-btn.active {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 76, 129, 0.25);
}

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

.product-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(245, 158, 11, 0.4);
}

.product-img-wrap {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: #e2e8f0;
}

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

.product-card:hover .product-img-wrap img {
  transform: scale(1.06);
}

.product-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--brand-accent);
  color: #ffffff;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 800;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.product-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-cat-name {
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--brand-primary-light);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.product-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-main);
  line-height: 1.35;
}

.product-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-price-block {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 12px 0;
  border-top: 1px dashed var(--border-color);
  margin-bottom: 14px;
}

.price-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
}

.price-value {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--brand-accent);
}

.min-order-pill {
  font-size: 0.72rem;
  background: rgba(15, 76, 129, 0.08);
  color: var(--brand-primary);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 700;
}

body.dark-mode .min-order-pill {
  background: rgba(2, 132, 199, 0.2);
  color: #38bdf8;
}

.product-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

/* ==========================================================================
   INTERACTIVE ORDER ESTIMATOR TOOL
   ========================================================================== */
.estimator-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.estimator-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-body);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.15);
}

.estimator-result-card {
  background: linear-gradient(135deg, rgba(15, 76, 129, 0.05) 0%, rgba(245, 158, 11, 0.08) 100%);
  border: 1px solid rgba(15, 76, 129, 0.2);
  border-radius: var(--radius-md);
  padding: 30px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 0.92rem;
}

body.dark-mode .result-row {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.result-row.total {
  border-bottom: none;
  padding-top: 18px;
  font-size: 1.15rem;
  font-weight: 800;
}

.result-row.total .total-price {
  font-size: 1.6rem;
  color: var(--brand-accent);
  font-weight: 900;
}

.result-per-item {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.result-bonus {
  margin-top: 16px;
  padding: 12px;
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-sm);
  color: #059669;
  font-size: 0.82rem;
  font-weight: 700;
}

body.dark-mode .result-bonus {
  color: #34d399;
}

/* ==========================================================================
   CONTACT, SHOWROOM & GOOGLE MAPS
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.contact-info-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: rgba(15, 76, 129, 0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

body.dark-mode .contact-icon {
  background: rgba(2, 132, 199, 0.15);
}

.legal-box-badge {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  padding: 18px;
  border-radius: var(--radius-md);
  margin-top: 10px;
  font-size: 0.88rem;
  line-height: 1.7;
}

.legal-box-badge strong {
  color: var(--brand-primary);
}

body.dark-mode .legal-box-badge strong {
  color: #38bdf8;
}

.maps-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  min-height: 420px;
  display: flex;
  flex-direction: column;
}

.maps-header {
  padding: 16px 20px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.maps-iframe-wrap {
  flex-grow: 1;
  width: 100%;
  min-height: 380px;
}

.maps-iframe-wrap iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ==========================================================================
   MAIN FOOTER
   ========================================================================== */
.main-footer {
  background: #0a192f;
  color: #e2e8f0;
  padding: 60px 0 30px;
  border-top: 4px solid var(--brand-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  font-size: 1.1rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--brand-accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
  color: #94a3b8;
}

.footer-links a:hover {
  color: var(--brand-accent);
  transform: translateX(4px);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.82rem;
  color: #64748b;
}

/* ==========================================================================
   BRAND ASSISTANT CHAT WIDGET (3-TIER ARCHITECTURE)
   ========================================================================== */
.brand-fab-launcher {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  background: linear-gradient(135deg, #0f4c81 0%, #0284c7 100%);
  color: #ffffff;
  padding: 10px 18px 10px 12px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 8px 24px rgba(15, 76, 129, 0.45);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.brand-fab-launcher:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 12px 32px rgba(15, 76, 129, 0.6);
}

.brand-fab-icon-box {
  position: relative;
  width: 44px;
  height: 44px;
  background: #ffffff;
  color: var(--brand-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.brand-fab-pulse {
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 50%;
  border: 2px solid var(--brand-accent);
  animation: fabPulse 2s infinite;
}

@keyframes fabPulse {
  0% { transform: scale(0.95); opacity: 1; }
  100% { transform: scale(1.4); opacity: 0; }
}

.brand-fab-text {
  display: flex;
  flex-direction: column;
}

.brand-fab-title {
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0.3px;
  line-height: 1.2;
}

.brand-fab-sub {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
}

.brand-fab-badge {
  background: var(--brand-accent);
  color: #ffffff;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
}

/* Chat Window */
.brand-chat-window {
  position: fixed;
  bottom: 96px;
  right: 24px;
  width: 390px;
  max-width: calc(100vw - 32px);
  height: 580px;
  max-height: calc(100vh - 120px);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.brand-chat-window.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.brand-chat-header {
  background: linear-gradient(135deg, #0f4c81 0%, #0a355c 100%);
  color: #ffffff;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-chat-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-avatar {
  position: relative;
  width: 40px;
  height: 40px;
  background: #ffffff;
  color: var(--brand-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.brand-online-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 11px;
  height: 11px;
  background: #10b981;
  border: 2px solid #ffffff;
  border-radius: 50%;
}

.brand-title {
  font-size: 1rem;
  font-weight: 800;
}

.brand-status-text {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.85);
}

.brand-header-actions {
  display: flex;
  gap: 8px;
}

.brand-icon-btn {
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #ffffff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
}

.brand-icon-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Quick Suggestion Chips */
.brand-quick-suggestions {
  padding: 10px 14px;
  background: var(--bg-surface-alt);
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--border-color);
}

.brand-quick-suggestions::-webkit-scrollbar {
  display: none;
}

.suggestion-chip {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.74rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.suggestion-chip:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #ffffff;
}

.brand-chat-body {
  flex-grow: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--bg-body);
}

.brand-msg {
  display: flex;
  gap: 10px;
  max-width: 86%;
}

.brand-msg.bot {
  align-self: flex-start;
}

.brand-msg.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.brand-msg-avatar {
  width: 30px;
  height: 30px;
  background: rgba(15, 76, 129, 0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.brand-msg-bubble {
  padding: 11px 15px;
  border-radius: 14px;
  font-size: 0.88rem;
  line-height: 1.5;
  box-shadow: var(--shadow-sm);
}

.brand-msg.bot .brand-msg-bubble {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-top-left-radius: 2px;
}

.brand-msg.user .brand-msg-bubble {
  background: var(--brand-primary);
  color: #ffffff;
  border-top-right-radius: 2px;
}

.brand-chat-footer {
  padding: 12px 14px 10px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
}

.brand-input-form {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 4px 6px 4px 14px;
}

.brand-input-field {
  flex-grow: 1;
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--text-main);
  resize: none;
  height: 24px;
  line-height: 24px;
}

.brand-input-field:focus {
  outline: none;
}

.brand-send-btn {
  width: 34px;
  height: 34px;
  background: var(--brand-primary);
  border: none;
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.brand-send-btn:hover {
  background: var(--brand-accent);
}

.brand-footer-note {
  text-align: center;
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 600;
}

/* Modal Popup */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

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

.modal-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  border: 1px solid var(--border-color);
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}

/* Toast */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 999999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.88rem;
  font-weight: 700;
  animation: slideIn 0.3s ease;
}

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

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-badge-pill, .hero-cta-group {
    justify-content: center;
  }
  .hero-legal-box {
    border-left: none;
    border-top: 4px solid var(--brand-accent);
    border-radius: var(--radius-md);
  }
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   13-YEAR JOURNEY & FOUNDER STORY
   ========================================================================== */
.journey-section {
  background: var(--bg-surface-alt);
  position: relative;
  overflow: hidden;
}

.journey-quote-banner {
  background: linear-gradient(135deg, #0a355c 0%, #0f4c81 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  margin-bottom: 48px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  gap: 24px;
}

.journey-quote-icon {
  font-size: 3rem;
  line-height: 1;
  color: var(--brand-accent);
  flex-shrink: 0;
}

.journey-quote-text {
  font-size: 1.22rem;
  font-weight: 800;
  line-height: 1.45;
  color: #ffffff;
  font-style: italic;
}

.journey-quote-author {
  font-size: 0.88rem;
  color: #fbbf24;
  margin-top: 8px;
  font-weight: 700;
}

.journey-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.journey-step-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.journey-step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(245, 158, 11, 0.4);
}

.journey-step-number {
  font-size: 0.78rem;
  font-weight: 900;
  color: var(--brand-accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.journey-step-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.3;
}

.journey-step-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   B2B STRATEGIC PARTNERSHIP & BNI REFERRAL
   ========================================================================== */
.b2b-section {
  position: relative;
}

.b2b-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.b2b-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.b2b-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 28px;
  right: 28px;
  height: 3px;
  background: transparent;
  transition: var(--transition);
  border-radius: 2px;
}

.b2b-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(15, 76, 129, 0.3);
}

.b2b-card:hover::after {
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
}

.b2b-index-badge {
  font-size: 0.8rem;
  font-weight: 900;
  color: var(--brand-primary);
  background: rgba(15, 76, 129, 0.08);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 16px;
}

body.dark-mode .b2b-index-badge {
  background: rgba(2, 132, 199, 0.2);
  color: #38bdf8;
}

.b2b-title {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.3;
}

.b2b-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.b2b-features-list {
  font-size: 0.86rem;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 22px;
}

.b2b-features-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.b2b-features-list li::before {
  content: '★';
  color: var(--brand-accent);
}

/* BNI Referral Banner */
.bni-referral-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border: 2px solid var(--brand-accent);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  color: #ffffff;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.3);
  position: relative;
  overflow: hidden;
}

.bni-referral-banner::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.35) 0%, transparent 70%);
}

.bni-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand-accent);
  color: #ffffff;
  font-size: 0.76rem;
  font-weight: 900;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.bni-quote-text {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.45;
  color: #f8fafc;
  font-style: italic;
  margin-bottom: 8px;
}

.bni-quote-sub {
  font-size: 0.88rem;
  color: #94a3b8;
}

/* Responsive updates */
@media (max-width: 1024px) {
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .journey-steps-grid {
    grid-template-columns: 1fr;
  }
  .b2b-grid {
    grid-template-columns: 1fr;
  }
  .bni-referral-banner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .estimator-card {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .top-bar {
    display: none;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 82px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
  }
  .nav-menu.active {
    display: flex;
  }
  .nav-toggle-btn {
    display: block;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .products-grid {
    grid-template-columns: 1fr;
  }
  .brand-fab-sub {
    display: none;
  }
  .brand-chat-window {
    right: 16px;
    bottom: 84px;
    width: calc(100vw - 32px);
    height: 520px;
  }
}

/* ==========================================================================
   HANOI SHOWCASE & LEADERSHIP SECTION
   ========================================================================== */
.hanoi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.hanoi-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
  display: flex;
  flex-direction: column;
}

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

.hanoi-card-img-wrap {
  position: relative;
  width: 100%;
  height: 280px;
  overflow: hidden;
  background: #0f172a;
}

.hanoi-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hanoi-card:hover .hanoi-card-img-wrap img {
  transform: scale(1.06);
}

.hanoi-card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  color: #fbbf24;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 800;
  border: 1px solid rgba(251, 191, 36, 0.4);
}

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

.hanoi-card-tag {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--brand-primary);
  margin-bottom: 8px;
}

body.dark-mode .hanoi-card-tag {
  color: #38bdf8;
}

.hanoi-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.35;
}

.hanoi-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.hanoi-card-points {
  list-style: none;
  padding: 0;
  margin: 0;
  margin-top: auto;
  border-top: 1px dashed var(--border-color);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hanoi-card-points li {
  font-size: 0.82rem;
  color: var(--text-main);
  position: relative;
  padding-left: 20px;
  line-height: 1.45;
}

.hanoi-card-points li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: #10b981;
  font-weight: 900;
}

/* Director Banner Card */
.director-banner-card {
  display: grid;
  grid-template-columns: 360px 1fr;
  background: linear-gradient(135deg, rgba(15, 76, 129, 0.06) 0%, rgba(245, 158, 11, 0.08) 100%), var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  align-items: center;
}

.director-banner-visual {
  height: 100%;
  min-height: 420px;
  background: #0f172a;
  overflow: hidden;
}

.director-banner-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.5s ease;
}

.director-banner-card:hover .director-banner-visual img {
  transform: scale(1.03);
}

.director-banner-content {
  padding: 36px 40px;
}

.director-banner-title {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--text-main);
  margin: 14px 0 16px;
  line-height: 1.3;
}

.director-banner-quote {
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-main);
  line-height: 1.7;
  margin-bottom: 18px;
  border-left: 3px solid var(--brand-accent);
  padding-left: 16px;
}

.director-banner-meta {
  font-size: 0.92rem;
  color: var(--brand-primary);
  margin-bottom: 24px;
}

body.dark-mode .director-banner-meta {
  color: #38bdf8;
}

.director-banner-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 992px) {
  .hanoi-grid {
    grid-template-columns: 1fr;
  }
  .director-banner-card {
    grid-template-columns: 1fr;
  }
  .director-banner-visual {
    height: 380px;
  }
  .director-banner-content {
    padding: 24px;
  }
}

/* ==========================================================================
   LIGHTBOX MODAL & SCROLL TO TOP
   ========================================================================== */
.lightbox-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(10, 15, 29, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.25s ease;
}

.lightbox-modal.active {
  display: flex;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: zoomIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox-img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.lightbox-caption {
  margin-top: 14px;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
  background: rgba(15, 23, 42, 0.8);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox-close {
  position: absolute;
  top: -46px;
  right: -10px;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.lightbox-close:hover {
  background: #ef4444;
  border-color: #ef4444;
  transform: scale(1.1);
}

/* Scroll To Top */
.btn-scroll-top {
  position: fixed;
  bottom: 28px;
  left: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-surface);
  color: var(--brand-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  font-size: 1.25rem;
  font-weight: 900;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s ease;
  z-index: 900;
}

.btn-scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.btn-scroll-top:hover {
  background: var(--brand-primary);
  color: #ffffff;
  border-color: var(--brand-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

body.dark-mode .btn-scroll-top {
  color: #38bdf8;
}

body.dark-mode .btn-scroll-top:hover {
  color: #ffffff;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes zoomIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}