/* =========================================
   SIMLAB VIỆT NAM - Main Stylesheet
   Design System: Dark Tech Theme
   ========================================= */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700;800&display=swap');

/* --- CSS Variables (Design Tokens) --- */
:root {
  --primary: #0a1628;
  --primary-mid: #0f2040;
  --secondary: #1e3a5f;
  --accent-cyan: #00d4ff;
  --accent-cyan-dim: rgba(0, 212, 255, 0.15);
  --accent-cyan-glow: rgba(0, 212, 255, 0.4);
  --accent-orange: #ff6b35;
  --accent-orange-dim: rgba(255, 107, 53, 0.15);
  --accent-green: #00e676;
  --text-primary: #e8f4f8;
  --text-secondary: #a0bdd0;
  --text-muted: #5a7a95;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-bg-hover: rgba(0, 212, 255, 0.08);
  --shadow-cyan: 0 0 30px rgba(0, 212, 255, 0.2);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --border-radius: 16px;
  --border-radius-sm: 8px;
  --border-radius-lg: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-heading: 'Be Vietnam Pro', 'Inter', sans-serif;
  --font-body: 'Inter', 'Be Vietnam Pro', sans-serif;
  --nav-height: 70px;
}

/* --- Reset & Base --- */
*, *::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(--primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.2rem; }

p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

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

a:hover { color: #66e0ff; }

ul { list-style: none; }

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

/* --- Utility Classes --- */
.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }
.mt-6 { margin-top: 4rem !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }
.mb-6 { margin-bottom: 4rem !important; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding { padding: 100px 0; }
.section-padding-sm { padding: 60px 0; }

.text-center { text-align: center; }
.text-gradient {
  background: linear-gradient(135deg, var(--accent-cyan), #7b61ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-orange {
  background: linear-gradient(135deg, var(--accent-orange), #ffb347);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-cyan { color: var(--accent-cyan); }
.text-orange { color: var(--accent-orange); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.badge-cyan {
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 212, 255, 0.3);
}

.badge-orange {
  background: var(--accent-orange-dim);
  color: var(--accent-orange);
  border: 1px solid rgba(255, 107, 53, 0.3);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-cyan);
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 60px;
  line-height: 1.8;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
  color: #000;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5);
  color: #000;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
  transform: translateY(-2px);
}

.btn-orange {
  background: linear-gradient(135deg, var(--accent-orange), #ff8c42);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 107, 53, 0.35);
}

.btn-orange:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 107, 53, 0.5);
  color: #fff;
}

.btn-lg {
  padding: 18px 44px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.85rem;
}

/* --- Glass Card --- */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: var(--transition);
  overflow: hidden;
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(0, 212, 255, 0.25);
  box-shadow: var(--shadow-cyan);
  transform: translateY(-4px);
}

/* --- Grid Layouts --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* =========================================
   NAVIGATION
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: var(--nav-height);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo img {
  height: 38px;
  filter: brightness(1.1);
}

.nav-logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.2;
}

.nav-logo-text span:first-child {
  display: block;
  color: var(--text-primary);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.nav-logo-text span:last-child {
  color: var(--accent-cyan);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--glass-bg);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
}

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

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  padding: 4px;
  gap: 2px;
}

.lang-btn {
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: transparent;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.lang-btn.active {
  background: var(--accent-cyan);
  color: #000;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #040d1a 0%, #0a1628 40%, #0f2040 70%, #0a1a35 100%);
  padding-top: var(--nav-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(123, 97, 255, 0.12) 0%, transparent 70%);
  bottom: 0;
  left: -50px;
  animation-delay: 3s;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  animation-delay: 6s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -20px) scale(1.05); }
  66% { transform: translate(-15px, 15px) scale(0.95); }
}

/* Particles canvas */
#particles-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
  width: 100%;
}

.hero-text { max-width: 580px; }

.hero-badge {
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-title .line-1 { color: var(--text-primary); }
.hero-title .line-2 {
  background: linear-gradient(135deg, var(--accent-cyan), #7b61ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--glass-border);
}

.hero-stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1;
  font-family: var(--font-heading);
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Hero Visual - Product Cards */
.hero-visual {
  position: relative;
}

.hero-product-cards {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-product-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  padding: 24px;
  backdrop-filter: blur(20px);
  transition: var(--transition);
  cursor: pointer;
}

.hero-product-card:hover {
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: var(--shadow-cyan);
  transform: translateX(8px);
}

.hero-product-card.card-composer {
  animation: cardFloat 6s ease-in-out infinite;
}

.hero-product-card.card-vr {
  animation: cardFloat 6s ease-in-out infinite 2s;
  margin-left: 24px;
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hero-product-card.card-vr:hover { transform: translateX(8px); }

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.hero-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.icon-composer { background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 212, 255, 0.05)); }
.icon-vr { background: linear-gradient(135deg, rgba(123, 97, 255, 0.2), rgba(123, 97, 255, 0.05)); }

.hero-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.hero-card-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.hero-card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

.hero-card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.tag {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 500;
  background: rgba(255,255,255,0.07);
  color: var(--text-secondary);
  border: 1px solid var(--glass-border);
}

.hero-floating-badge {
  position: absolute;
  top: -20px;
  right: -10px;
  background: linear-gradient(135deg, var(--accent-orange), #ff8c42);
  color: white;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 0.75rem;
  font-weight: 700;
  text-align: center;
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.4);
  animation: badgePulse 3s ease-in-out infinite;
  line-height: 1.3;
}

@keyframes badgePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* =========================================
   SECTION: ABOUT / TRUSTED PARTNERS
   ========================================= */
.about-strip {
  background: rgba(255,255,255,0.02);
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
  padding: 32px 0;
}

.about-strip-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.strip-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.strip-item svg, .strip-item .strip-icon {
  color: var(--accent-cyan);
  font-size: 1.2rem;
}

/* =========================================
   SECTION: PRODUCTS
   ========================================= */
.products-section { background: var(--primary); }

.product-card {
  padding: 40px;
  border-radius: var(--border-radius-lg);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.product-card.composer::before {
  background: linear-gradient(90deg, var(--accent-cyan), #7b61ff);
}

.product-card.vr-studio::before {
  background: linear-gradient(90deg, #7b61ff, var(--accent-orange));
}

.product-icon-area {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.product-icon-box {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.icon-box-cyan {
  background: linear-gradient(135deg, rgba(0,212,255,0.2), rgba(0,212,255,0.05));
  border: 1px solid rgba(0,212,255,0.2);
}

.icon-box-purple {
  background: linear-gradient(135deg, rgba(123,97,255,0.2), rgba(123,97,255,0.05));
  border: 1px solid rgba(123,97,255,0.2);
}

.product-version {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(0,212,255,0.1);
  color: var(--accent-cyan);
  letter-spacing: 0.5px;
}

.product-card h3 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.product-card > p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 0.95rem;
}

.feature-list {
  margin-bottom: 32px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

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

.feature-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(0,212,255,0.15);
  border: 1px solid rgba(0,212,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  font-size: 0.65rem;
  color: var(--accent-cyan);
}

.feature-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

/* Plugin badges */
.plugins-section { margin-top: 60px; }
.plugins-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.plugin-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

.plugin-badge:hover {
  border-color: rgba(0,212,255,0.3);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* =========================================
   SECTION: WHY CHOOSE US
   ========================================= */
.why-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-mid) 100%);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.why-card {
  padding: 32px;
  border-radius: var(--border-radius);
}

.why-card-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  background: var(--accent-cyan-dim);
  border: 1px solid rgba(0,212,255,0.2);
}

.why-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.why-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* =========================================
   SECTION: SERVICES
   ========================================= */
.services-section { background: var(--primary); }

.service-card {
  padding: 36px;
  border-radius: var(--border-radius);
  text-align: center;
  position: relative;
}

.service-number {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 3rem;
  font-weight: 900;
  color: rgba(255,255,255,0.04);
  font-family: var(--font-heading);
  line-height: 1;
}

.service-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: var(--accent-cyan-dim);
  border-color: rgba(0,212,255,0.3);
  transform: scale(1.1);
}

.service-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.87rem;
  line-height: 1.7;
  margin: 0;
}

/* =========================================
   SECTION: TRAINING
   ========================================= */
.training-section { background: linear-gradient(180deg, var(--primary-mid) 0%, var(--primary) 100%); }

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

.training-card {
  padding: 32px;
  border-radius: var(--border-radius);
  position: relative;
  overflow: hidden;
}

.training-card-level {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.training-card h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.training-duration {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.training-topics {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.training-topic {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.training-topic::before {
  content: '→';
  color: var(--accent-cyan);
  font-size: 0.75rem;
}

/* =========================================
   SECTION: CTA
   ========================================= */
.cta-section {
  background: linear-gradient(135deg, #0a1628 0%, #0f1f40 50%, #0a1628 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 120px 0;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse at center, rgba(0,212,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content { position: relative; z-index: 1; }

.cta-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 20px;
}

.cta-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 40px;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-contact-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-item-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

/* =========================================
   FOOTER
   ========================================= */
footer {
  background: #050d1a;
  border-top: 1px solid var(--glass-border);
  padding: 60px 0 30px;
}

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

.footer-brand {}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  text-decoration: none;
}

.footer-logo img { height: 32px; filter: brightness(1.1); }

.footer-logo-vn {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--accent-cyan);
}

.footer-desc {
  font-size: 0.87rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  text-decoration: none;
  transition: var(--transition);
  color: var(--text-muted);
}

.social-btn:hover {
  background: var(--accent-cyan-dim);
  border-color: rgba(0,212,255,0.3);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.footer-col h5 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.87rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

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

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

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.87rem;
  color: var(--text-muted);
}

.footer-contact-icon { color: var(--accent-cyan); font-size: 0.9rem; flex-shrink: 0; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-bottom-links a:hover { color: var(--accent-cyan); }

/* =========================================
   PAGE HERO (sub-pages)
   ========================================= */
.page-hero {
  min-height: 340px;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  background: linear-gradient(135deg, #040d1a 0%, #0a1628 60%, #0f2040 100%);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.page-hero::after {
  content: '';
  position: absolute;
  top: 50%; left: 30%;
  transform: translate(-50%, -50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse at center, rgba(0,212,255,0.1) 0%, transparent 70%);
}

.page-hero-content {
  position: relative;
  z-index: 1;
  padding: 60px 0;
}

.page-hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.page-hero-breadcrumb a { color: var(--text-muted); text-decoration: none; transition: var(--transition); }
.page-hero-breadcrumb a:hover { color: var(--accent-cyan); }
.page-hero-breadcrumb span { color: var(--accent-cyan); }

/* =========================================
   CONTACT PAGE
   ========================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info-card {
  padding: 40px;
  border-radius: var(--border-radius-lg);
}

.contact-info-items {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 32px 0;
}

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

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--accent-cyan-dim);
  border: 1px solid rgba(0,212,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-info-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-info-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
}

.contact-info-value a {
  color: var(--text-primary);
  text-decoration: none;
}

.contact-info-value a:hover { color: var(--accent-cyan); }

.working-hours {
  margin-top: 32px;
  padding: 20px;
  border-radius: var(--border-radius-sm);
  background: rgba(0,212,255,0.05);
  border: 1px solid rgba(0,212,255,0.1);
}

.working-hours h5 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--accent-cyan);
}

.wh-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  padding: 4px 0;
  color: var(--text-secondary);
}

/* Form placeholder */
.contact-form-card {
  padding: 40px;
  border-radius: var(--border-radius-lg);
}

.placeholder-notice {
  text-align: center;
  padding: 40px 20px;
}

.placeholder-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.placeholder-notice h4 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.placeholder-notice p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* =========================================
   CHATBOT WIDGET
   ========================================= */
.chatbot-widget {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9999;
  font-family: var(--font-body);
}

.chatbot-toggle-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px rgba(0,212,255,0.4);
  transition: var(--transition);
  position: relative;
  z-index: 2;
}

.chatbot-toggle-btn:hover { transform: scale(1.1); box-shadow: 0 12px 40px rgba(0,212,255,0.5); }

.chatbot-toggle-btn svg { width: 26px; height: 26px; color: #000; }

.chatbot-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(0,212,255,0.3);
  animation: chatPulse 2.5s ease-out infinite;
}

@keyframes chatPulse {
  0% { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(1.8); opacity: 0; }
}

.chatbot-notification {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-orange);
  border: 2px solid var(--primary);
  font-size: 0.6rem;
  font-weight: 700;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chatbot-window {
  position: absolute;
  bottom: 76px;
  right: 0;
  width: 380px;
  max-height: 560px;
  background: #0d1f35;
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,212,255,0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform-origin: bottom right;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  transform: scale(0);
  opacity: 0;
  pointer-events: none;
}

.chatbot-window.open {
  transform: scale(1);
  opacity: 1;
  pointer-events: all;
}

.chatbot-header {
  background: linear-gradient(135deg, #0a1e38, #0d2540);
  border-bottom: 1px solid var(--glass-border);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.chatbot-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), #7b61ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  position: relative;
}

.chatbot-avatar::after {
  content: '';
  position: absolute;
  bottom: 1px;
  right: 1px;
  width: 10px;
  height: 10px;
  background: var(--accent-green);
  border-radius: 50%;
  border: 2px solid #0d1f35;
}

.chatbot-header-info { flex: 1; }

.chatbot-header-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-heading);
}

.chatbot-header-status {
  font-size: 0.72rem;
  color: var(--accent-green);
  display: flex;
  align-items: center;
  gap: 4px;
}

.chatbot-header-status::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
}

.chatbot-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}

.chatbot-close-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }

.chatbot-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.chatbot-messages::-webkit-scrollbar { width: 4px; }
.chatbot-messages::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.chat-message {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  animation: msgFadeIn 0.3s ease-out;
}

@keyframes msgFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message.user { flex-direction: row-reverse; }

.msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), #7b61ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.msg-bubble {
  max-width: 78%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 0.85rem;
  line-height: 1.6;
  position: relative;
}

.chat-message.bot .msg-bubble {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.08);
  border-bottom-left-radius: 4px;
  color: var(--text-primary);
}

.chat-message.user .msg-bubble {
  background: linear-gradient(135deg, #00a8cc, #0090b8);
  color: #000;
  border-bottom-right-radius: 4px;
  font-weight: 500;
}

.msg-time {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 4px;
  padding: 0 4px;
}

/* Quick replies */
.quick-replies {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 0;
}

.quick-reply-btn {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid rgba(0,212,255,0.3);
  background: rgba(0,212,255,0.08);
  color: var(--accent-cyan);
  white-space: nowrap;
}

.quick-reply-btn:hover {
  background: rgba(0,212,255,0.2);
  transform: translateY(-1px);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

.typing-dots {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  border-bottom-left-radius: 4px;
  padding: 12px 16px;
  display: flex;
  gap: 4px;
  align-items: center;
}

.typing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typingBounce 1.2s ease-in-out infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(-5px); opacity: 1; }
}

.chatbot-input-area {
  border-top: 1px solid var(--glass-border);
  padding: 14px 16px;
  display: flex;
  gap: 10px;
  align-items: center;
  background: rgba(0,0,0,0.2);
  flex-shrink: 0;
}

.chatbot-input {
  flex: 1;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 24px;
  padding: 10px 16px;
  font-size: 0.87rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  outline: none;
  transition: var(--transition);
  resize: none;
  height: 40px;
  line-height: 20px;
}

.chatbot-input:focus {
  border-color: rgba(0,212,255,0.4);
  background: rgba(0,212,255,0.05);
}

.chatbot-input::placeholder { color: var(--text-muted); }

.chatbot-send-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.chatbot-send-btn:hover { transform: scale(1.1); box-shadow: 0 4px 16px rgba(0,212,255,0.4); }
.chatbot-send-btn svg { width: 16px; height: 16px; color: #000; }

/* =========================================
   SCROLL TO TOP
   ========================================= */
.scroll-top-btn {
  position: fixed;
  bottom: 104px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-secondary);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 999;
}

.scroll-top-btn.visible {
  opacity: 1;
  pointer-events: all;
}

.scroll-top-btn:hover {
  background: var(--accent-cyan-dim);
  border-color: rgba(0,212,255,0.3);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .training-cards { grid-template-columns: 1fr 1fr; }
  .hero-content { gap: 48px; }
}

@media (max-width: 768px) {
  :root { --nav-height: 64px; }
  
  .hamburger { display: flex; }
  
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid var(--glass-border);
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
    z-index: 999;
  }
  
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .nav-link { width: 100%; padding: 12px 16px; }
  
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .hero-title { font-size: 2.2rem; }
  
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .training-cards { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  
  .hero-stats { gap: 16px; }
  .section-padding { padding: 70px 0; }
  
  .chatbot-window { width: 330px; }
  
  .about-strip-inner { gap: 24px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .chatbot-widget { bottom: 16px; right: 16px; }
  .chatbot-window { width: calc(100vw - 32px); right: -8px; }
}

/* =========================================
   CUSTOM SERVICES REDESIGN
   ========================================= */
.services-section .service-card {
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.services-section .service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.15), inset 0 0 20px rgba(255, 255, 255, 0.02);
}

.services-section .service-card:hover .service-icon {
  transform: scale(1.1) rotate(5deg);
}

.btn-pulse {
  animation: pulse-glow 2s infinite;
  box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.7);
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.7); }
  70% { box-shadow: 0 0 0 15px rgba(0, 212, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0); }
}