/* ==========================================================================
   ALBS | Indochina Travel Services (albs.itsvietnam.vn)
   Modern, Authentic & Responsive Design System
   ========================================================================== */

/* 1. Design Tokens & Variables */
:root {
  /* Brand Colors */
  --primary-deep: #0A2540;
  --primary-navy: #0D1F2D;
  --primary-teal: #0F4C5C;
  --accent-gold: #E6A15C;
  --accent-gold-hover: #F3B154;
  --accent-gold-dark: #C47F35;
  --emerald-lotus: #1D5D4E;
  --emerald-light: #2D7D68;
  
  /* Neutral Shades */
  --bg-parchment: #FAF7F2;
  --bg-card-light: #FFFFFF;
  --bg-dark: #081420;
  --bg-dark-card: #0F2336;
  
  --text-main: #1C2833;
  --text-muted: #566573;
  --text-light: #F4F6F7;
  --text-gold: #E6A15C;
  
  /* Border & Shadows */
  --border-subtle: rgba(14, 37, 64, 0.1);
  --border-gold: rgba(230, 161, 92, 0.3);
  --shadow-sm: 0 4px 12px rgba(10, 37, 64, 0.05);
  --shadow-md: 0 10px 30px rgba(10, 37, 64, 0.08);
  --shadow-lg: 0 20px 40px rgba(10, 37, 64, 0.15);
  --shadow-glow: 0 0 25px rgba(230, 161, 92, 0.25);
  
  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  
  /* Layout & Transitions */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 50px;
  --transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1280px;
}

/* Dark Mode Overrides */
body.dark-mode {
  --bg-parchment: #060E17;
  --bg-card-light: #0C1B2A;
  --text-main: #EAECEE;
  --text-muted: #A6ACAF;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* 2. Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-parchment);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

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

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

ul {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  border: none;
}

button {
  cursor: pointer;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--primary-deep);
}

body.dark-mode h1, body.dark-mode h2, body.dark-mode h3, body.dark-mode h4 {
  color: #FFFFFF;
}

.text-gold {
  color: var(--accent-gold) !important;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(230, 161, 92, 0.12);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-gold-dark);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

body.dark-mode .section-tag {
  color: var(--accent-gold);
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.85rem;
  }
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 40px auto;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-gold {
  background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(230, 161, 92, 0.35);
}

.btn-gold:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(230, 161, 92, 0.5);
  background: linear-gradient(135deg, var(--accent-gold-hover) 0%, var(--accent-gold) 100%);
}

.btn-outline-gold {
  background: transparent;
  color: var(--accent-gold);
  border: 2px solid var(--accent-gold);
}

.btn-outline-gold:hover {
  background: var(--accent-gold);
  color: #FFFFFF;
  transform: translateY(-3px);
}

.btn-dark {
  background: var(--primary-deep);
  color: #FFFFFF;
}

.btn-dark:hover {
  background: var(--primary-teal);
  transform: translateY(-3px);
}

/* 3. Top Announcement Bar */
.top-bar {
  background: var(--primary-navy);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.825rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

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

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

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

.currency-select, .lang-select {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  cursor: pointer;
}

.currency-select option, .lang-select option {
  background: var(--primary-navy);
  color: #FFFFFF;
}

/* 4. Main Header Navigation */
.main-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

body.dark-mode .main-header {
  background: rgba(6, 14, 23, 0.92);
}

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

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

.brand-logo-img {
  height: 52px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(10, 37, 64, 0.1);
  transition: var(--transition);
}

.brand-logo-img:hover {
  transform: scale(1.03);
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary-deep), var(--primary-teal));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold);
  font-size: 1.4rem;
  box-shadow: 0 4px 12px rgba(10, 37, 64, 0.15);
  border: 1px solid var(--border-gold);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--primary-deep);
  line-height: 1.1;
}

body.dark-mode .logo-title {
  color: #FFFFFF;
}

.logo-subtitle {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-gold-dark);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Nav Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
  position: relative;
  padding: 8px 0;
}

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

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

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

body.dark-mode .nav-link:hover {
  color: var(--accent-gold);
}

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

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(10, 37, 64, 0.05);
  color: var(--primary-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
}

body.dark-mode .theme-toggle-btn {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-gold);
}

.theme-toggle-btn:hover {
  transform: rotate(15deg) scale(1.08);
}

/* Mobile Nav Toggle */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  cursor: pointer;
}

.hamburger span {
  width: 100%;
  height: 3px;
  background: var(--primary-deep);
  border-radius: 2px;
  transition: var(--transition);
}

body.dark-mode .hamburger span {
  background: #FFFFFF;
}

/* Mobile Drawer Navigation */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 380px;
  height: 100vh;
  background: var(--bg-card-light);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.25);
  z-index: 2000;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-drawer.open {
  right: 0;
}

.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.close-drawer-btn {
  background: transparent;
  font-size: 1.5rem;
  color: var(--text-main);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-nav-link {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
}

/* 5. Hero Section */
.hero-section {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(rgba(10, 37, 64, 0.65), rgba(10, 37, 64, 0.85)), url('../assets/images/hero-halong.png') center/cover no-repeat;
  color: #FFFFFF;
  padding: 100px 0 120px 0;
  text-align: center;
}

.hero-overlay-glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 40%, rgba(230, 161, 92, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-gold);
  margin-bottom: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 20px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 40px;
  font-weight: 400;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Search Engine Box */
.search-engine-box {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.5);
  margin-top: 30px;
}

body.dark-mode .search-engine-box {
  background: rgba(12, 27, 42, 0.95);
  border: 1px solid rgba(230, 161, 92, 0.3);
}

.search-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  align-items: end;
}

@media (max-width: 992px) {
  .search-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .search-grid {
    grid-template-columns: 1fr;
  }
}

.search-field {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.search-label {
  font-size: 0.825rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

body.dark-mode .search-label {
  color: #A6ACAF;
}

.search-select, .search-input {
  width: 100%;
  padding: 12px 16px;
  background: #F4F6F7;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-weight: 600;
  transition: var(--transition);
}

body.dark-mode .search-select, body.dark-mode .search-input {
  background: #081420;
  border-color: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

.search-select:focus, .search-input:focus {
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px rgba(230, 161, 92, 0.2);
}

/* 6. Stats & Trust Bar */
.stats-section {
  margin-top: -50px;
  position: relative;
  z-index: 10;
  padding-bottom: 60px;
}

.stats-card {
  background: var(--bg-card-light);
  border-radius: var(--radius-md);
  padding: 32px 40px;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border: 1px solid var(--border-subtle);
}

@media (max-width: 768px) {
  .stats-card {
    grid-template-columns: repeat(2, 1fr);
    padding: 24px;
  }
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(230, 161, 92, 0.15);
  color: var(--accent-gold-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--primary-deep);
  line-height: 1.1;
}

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

.stat-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* 7. Destinations Section */
.destinations-section {
  padding: 80px 0;
}

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

.tab-btn {
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  background: var(--bg-card-light);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}

.tab-btn:hover, .tab-btn.active {
  background: var(--primary-deep);
  color: #FFFFFF;
  border-color: var(--primary-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

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

@media (max-width: 992px) {
  .destinations-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .destinations-grid {
    grid-template-columns: 1fr;
  }
}

.dest-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 380px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  cursor: pointer;
}

.dest-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.dest-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.dest-card:hover .dest-img {
  transform: scale(1.08);
}

.dest-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10, 37, 64, 0.92) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  color: #FFFFFF;
}

.dest-country {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.dest-name {
  font-size: 1.6rem;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.dest-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
}

/* 8. Featured Tours Section */
.tours-section {
  padding: 80px 0;
  background: rgba(10, 37, 64, 0.03);
}

body.dark-mode .tours-section {
  background: rgba(255, 255, 255, 0.02);
}

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

@media (max-width: 992px) {
  .tours-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .tours-grid {
    grid-template-columns: 1fr;
  }
}

.tour-card {
  background: var(--bg-card-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-subtle);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.tour-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-gold);
}

.tour-img-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
}

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

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

.tour-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--primary-deep);
  color: var(--accent-gold);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.tour-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.tour-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
  line-height: 1.3;
}

.tour-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tour-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tour-price-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.tour-price-val {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-gold-dark);
}

body.dark-mode .tour-price-val {
  color: var(--accent-gold);
}

/* 9. ALBS B2B Technology Section */
.albs-tech-section {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary-deep) 0%, var(--primary-navy) 100%);
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.albs-tech-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(230, 161, 92, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.albs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

@media (max-width: 992px) {
  .albs-grid {
    grid-template-columns: 1fr;
  }
}

.albs-content h2 {
  color: #FFFFFF;
  font-size: 2.6rem;
  margin-bottom: 20px;
}

.albs-features {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 32px 0;
}

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

.albs-feat-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 12px;
  background: rgba(230, 161, 92, 0.15);
  border: 1px solid var(--border-gold);
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.albs-feat-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.albs-feat-desc {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
}

.albs-dashboard-mockup {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 24px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.mockup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 20px;
}

.mockup-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #FF5F56; }
.dot-yellow { background: #FFBD2E; }
.dot-green { background: #27C93F; }

.mockup-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mockup-row {
  background: rgba(255, 255, 255, 0.06);
  padding: 16px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.status-badge {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
}

.status-confirmed {
  background: rgba(39, 201, 63, 0.2);
  color: #27C93F;
}

.status-processing {
  background: rgba(255, 189, 46, 0.2);
  color: #FFBD2E;
}

/* 10. Interactive B2B Custom Estimator Section */
.estimator-section {
  padding: 90px 0;
}

.estimator-card {
  background: var(--bg-card-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-subtle);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

@media (max-width: 992px) {
  .estimator-card {
    grid-template-columns: 1fr;
    padding: 24px;
  }
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-parchment);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  transition: var(--transition);
}

body.dark-mode .form-control {
  background: #081420;
  border-color: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

.form-control:focus {
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px rgba(230, 161, 92, 0.2);
}

.estimator-output {
  background: var(--primary-deep);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.calc-price-display {
  margin: 24px 0;
  text-align: center;
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-gold);
}

.calc-price-amount {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent-gold);
  line-height: 1;
}

/* 11. Authentic Cultural Experiences Section */
.culture-section {
  padding: 90px 0;
  background: rgba(29, 93, 78, 0.04);
}

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

@media (max-width: 992px) {
  .culture-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .culture-grid {
    grid-template-columns: 1fr;
  }
}

.culture-card {
  background: var(--bg-card-light);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-subtle);
  transition: var(--transition);
  text-align: center;
}

.culture-card:hover {
  transform: translateY(-6px);
  border-color: var(--emerald-lotus);
  box-shadow: var(--shadow-md);
}

.culture-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px auto;
  border-radius: 50%;
  background: rgba(29, 93, 78, 0.12);
  color: var(--emerald-lotus);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.culture-title {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.culture-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 12. Testimonials Section */
.testimonials-section {
  padding: 90px 0;
}

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

@media (max-width: 992px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

.testimonial-card {
  background: var(--bg-card-light);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-subtle);
  position: relative;
}

.quote-icon {
  font-size: 2.5rem;
  color: var(--accent-gold);
  opacity: 0.4;
  margin-bottom: 12px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-deep);
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.author-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

.author-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 13. Footer */
.footer {
  background: var(--primary-navy);
  color: rgba(255, 255, 255, 0.8);
  padding: 80px 0 30px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 60px;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 576px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand .logo-title {
  color: #FFFFFF;
}

.footer-desc {
  font-size: 0.9rem;
  margin: 16px 0 24px 0;
  line-height: 1.6;
}

.footer-heading {
  color: #FFFFFF;
  font-size: 1.1rem;
  margin-bottom: 20px;
  font-family: var(--font-heading);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--accent-gold);
  transform: translateX(4px);
}

.footer-contact-item {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

/* 14. Modals & Lightbox */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-card-light);
  border-radius: var(--radius-lg);
  max-width: 650px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 36px;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-backdrop.open .modal-card {
  transform: translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(0, 0, 0, 0.06);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--text-main);
  transition: var(--transition);
}

body.dark-mode .modal-close-btn {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

.modal-close-btn:hover {
  background: var(--accent-gold);
  color: #FFFFFF;
}

/* Animation Utilities */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}